[CI] Increase timeout for Quantization Test in nightly build to 60 minutes (#3845)

Signed-off-by: zhumingjue <zhumingjue@huawei.com>

.buildkite/bootstrap-amd-omni.sh

@@ -56,6 +56,88 @@ check_run_all_label() {
     fi
 }
 
+is_docs_only_change() {
+    local file_path
+    local has_any=0
+
+    while IFS= read -r file_path; do
+        [[ -z "${file_path}" ]] && continue
+        has_any=1
+
+        if [[ "${file_path}" == docs/* ]]; then
+            continue
+        fi
+        if [[ "${file_path}" == *.md ]]; then
+            continue
+        fi
+        if [[ "${file_path}" == "mkdocs.yml" ]]; then
+            continue
+        fi
+        return 1
+    done
+
+    [[ "${has_any}" -eq 1 ]]
+}
+
+resolve_skip_ci() {
+    local is_pr_build=0
+    local files
+    local base_branch base_ref
+
+    if [[ "${BUILDKITE_PULL_REQUEST:-false}" != "false" && -n "${BUILDKITE_PULL_REQUEST:-}" ]]; then
+        is_pr_build=1
+    fi
+
+    if [[ "${is_pr_build}" -eq 1 ]]; then
+        base_branch="${BUILDKITE_PULL_REQUEST_BASE_BRANCH:-main}"
+        if ! git rev-parse --verify "origin/${base_branch}" >/dev/null 2>&1; then
+            echo "resolve_skip_ci: origin/${base_branch} not found locally; trying fetch" >&2
+            git fetch --depth=200 origin "${base_branch}" >/dev/null 2>&1 || true
+        fi
+
+        base_ref=""
+        if git rev-parse --verify "origin/${base_branch}" >/dev/null 2>&1; then
+            base_ref="origin/${base_branch}"
+        elif git rev-parse --verify "${base_branch}" >/dev/null 2>&1; then
+            base_ref="${base_branch}"
+        else
+            echo "resolve_skip_ci: cannot resolve PR base ${base_branch}; skip-ci=0" >&2
+            echo -n 0
+            return 0
+        fi
+
+        if ! files="$(git diff --name-only "${base_ref}...${BUILDKITE_COMMIT}" 2>/dev/null)"; then
+            echo "resolve_skip_ci: failed to compute PR changed files; skip-ci=0" >&2
+            echo -n 0
+            return 0
+        fi
+    elif [[ "${BUILDKITE_BRANCH:-}" == "main" ]]; then
+        if ! git rev-parse --verify "${BUILDKITE_COMMIT}^" >/dev/null 2>&1; then
+            echo "resolve_skip_ci: commit has no parent on main; skip-ci=0" >&2
+            echo -n 0
+            return 0
+        fi
+        if ! files="$(git diff --name-only "${BUILDKITE_COMMIT}^..${BUILDKITE_COMMIT}" 2>/dev/null)"; then
+            echo "resolve_skip_ci: failed to compute main changed files; skip-ci=0" >&2
+            echo -n 0
+            return 0
+        fi
+    else
+        echo "resolve_skip_ci: not PR/main build; skip-ci=0" >&2
+        echo -n 0
+        return 0
+    fi
+
+    if is_docs_only_change <<< "${files}"; then
+        echo "resolve_skip_ci: docs-only change detected; skip-ci=1" >&2
+        echo -n 1
+        return 0
+    fi
+
+    echo "resolve_skip_ci: non-doc changes detected; skip-ci=0" >&2
+    echo -n 0
+}
+
 if [[ -z "${COV_ENABLED:-}" ]]; then
     COV_ENABLED=0
 fi
@@ -91,8 +173,24 @@ upload_pipeline() {
 
     cd .buildkite
 
-    # Select test definition file: merge suite for main, ready suite for PRs
-    if [[ $BUILDKITE_BRANCH == "main" ]]; then
+    # Select test definition file: merge suite for main, ready suite for PRs.
+    # For debugging, DEBUG_TEST_YAML can override the selection — accepts
+    # "merge" or "ready" (case-insensitive).
+    if [[ -n "${DEBUG_TEST_YAML:-}" ]]; then
+        case "${DEBUG_TEST_YAML,,}" in
+            merge)
+                TEST_YAML="test-amd-merge.yml"
+                ;;
+            ready)
+                TEST_YAML="test-amd-ready.yaml"
+                ;;
+            *)
+                echo "ERROR: DEBUG_TEST_YAML must be 'merge' or 'ready', got '$DEBUG_TEST_YAML'" >&2
+                exit 1
+                ;;
+        esac
+        echo "DEBUG_TEST_YAML override: using $TEST_YAML"
+    elif [[ $BUILDKITE_BRANCH == "main" ]]; then
         TEST_YAML="test-amd-merge.yml"
     else
         TEST_YAML="test-amd-ready.yaml"
@@ -140,30 +238,13 @@ fi
 # Early exit start: skip pipeline if conditions are met
 # ----------------------------------------------------------------------
 
-# skip pipeline if all changed files are under docs/
+# Match CUDA Buildkite skip-ci behavior for docs/markdown-only changes.
 if [[ "${DOCS_ONLY_DISABLE}" != "1" ]]; then
-  if [[ -n "${file_diff:-}" ]]; then
-    docs_only=1
-    # Robust iteration over newline-separated file_diff
-    while IFS= read -r f; do
-      [[ -z "$f" ]] && continue
-      # **Policy:** only skip if *every* path starts with docs/
-      if [[ "$f" != docs/* ]]; then
-        docs_only=0
-        break
-      fi
-    done < <(printf '%s\n' "$file_diff" | tr ' ' '\n' | tr -d '\r')
-
-    if [[ "$docs_only" -eq 1 ]]; then
-      buildkite-agent annotate ":memo: CI skipped — docs/** only changes detected
-
-\`\`\`
-${file_diff}
-\`\`\`" --style "info" || true
-      echo "[docs-only] All changes are under docs/. Exiting before pipeline upload."
-      exit 0
+    SKIP_CI="$(resolve_skip_ci)"
+    if [[ "${SKIP_CI}" == "1" ]]; then
+        echo "[docs-only] Docs/markdown-only changes detected. Exiting before pipeline upload."
+        exit 0
     fi
-  fi
 fi
 
 # ----------------------------------------------------------------------

.buildkite/nightly-release-pipeline.yaml

@@ -1,20 +0,0 @@
-steps:
-  - label: "Build and upload wheel"
-    key: "build-wheel"
-    agents:
-      queue: cpu_queue_release
-    commands:
-      - "curl -LsSf https://astral.sh/uv/install.sh | sh"
-      - 'export PATH="$HOME/.local/bin:$PATH"'
-      - "uv venv --python=3.12 && source .venv/bin/activate"
-      - "uv pip install --upgrade build"
-      - "python3 -m build"
-      - "bash .buildkite/scripts/upload-nightly-wheels.sh"
-
-  - label: "Generate and upload wheel indices"
-    depends_on: "build-wheel"
-    allow_dependency_failure: true
-    agents:
-      queue: small_cpu_queue_release
-    commands:
-      - "bash .buildkite/scripts/generate-and-upload-nightly-index.sh"

.buildkite/pipeline-intel.yaml

@@ -10,7 +10,7 @@ steps:
           DOCKER_BUILDKIT: "1"
           # Buildkite will automatically replace this with the actual commit hash
           VLLM_IMAGE_TAG: "${BUILDKITE_COMMIT}"
-          VLLM_VERSION: "v0.20.0"
+          VLLM_VERSION: "v0.21.0"
         priority: 100
         timeout_in_minutes: 60
         soft_fail: false

.buildkite/pipeline-npu-a3.yaml

@@ -0,0 +1,110 @@
+# steps:
+#   - label: ":buildkit: Build and Push NPU Test Image - A3"
+#     key: image-build-a3
+#     agents:
+#       queue: "ascend-a3"
+#       resource_class: "npu-2"
+#     plugins:
+#       - kubernetes:
+#           metadata:
+#             annotations:
+#               vault.hashicorp.com/agent-init-first: "true"
+#               vault.hashicorp.com/agent-inject: "true"
+#               vault.hashicorp.com/agent-inject-perms-ca.pem: "0400"
+#               vault.hashicorp.com/agent-inject-perms-cert.pem: "0400"
+#               vault.hashicorp.com/agent-inject-perms-config.json: "0400"
+#               vault.hashicorp.com/agent-inject-perms-key.pem: "0400"
+#               vault.hashicorp.com/agent-inject-secret-ca.pem: internal/data/ascend/buildkitd
+#               vault.hashicorp.com/agent-inject-secret-cert.pem: internal/data/ascend/buildkitd
+#               vault.hashicorp.com/agent-inject-secret-config.json: internal/data/ascend/buildkitd
+#               vault.hashicorp.com/agent-inject-secret-key.pem: internal/data/ascend/buildkitd
+#               vault.hashicorp.com/agent-inject-template-ca.pem: "{{- with secret \"internal/data/ascend/buildkitd\" -}}\n{{ .Data.data.RootCA }}\n{{- end }}"
+#               vault.hashicorp.com/agent-inject-template-cert.pem: "{{- with secret \"internal/data/ascend/buildkitd\" -}}\n{{ .Data.data.ClientCaCert }}\n{{- end }}"
+#               vault.hashicorp.com/agent-inject-template-config.json: "{{- with secret \"internal/data/ascend/buildkitd\" -}}\n{{ .Data.data.dockerConfig }}\n{{- end }}"
+#               vault.hashicorp.com/agent-inject-template-key.pem: "{{- with secret \"internal/data/ascend/buildkitd\" -}}\n{{ .Data.data.ClientCaKey }}\n{{- end }}"
+#               vault.hashicorp.com/agent-pre-populate-only: "true"
+#               vault.hashicorp.com/agent-run-as-group: "1000"
+#               vault.hashicorp.com/agent-run-as-user: "1000"
+#               vault.hashicorp.com/agent-service-account-token-volume-name: token-vol
+#               vault.hashicorp.com/role: ascend-gha-runners
+#               vault.hashicorp.com/secret-volume-path: /home/user/.docker/
+#               vault.hashicorp.com/tls-skip-verify: "true"
+#           podSpecPatch:
+#             volumes:
+#             - name: token-vol
+#               projected:
+#                 defaultMode: 420
+#                 sources:
+#                 - serviceAccountToken:
+#                     audience: api
+#                     expirationSeconds: 600
+#                     path: token
+#     env:
+#       VLLM_IMAGE_TAG: "${BUILDKITE_COMMIT}"
+#       IMAGE_NAME: "vllm-omni-ci-npu"
+#       IMAGE_REGISTRY: "swr.cn-southwest-2.myhuaweicloud.com/modelfoundry"
+#       BUILDKITD_ADDR: "tcp://buildkitd-service.buildkitd:1234"
+#     command: |
+#       set -ex
+
+#       echo "--- Building and pushing NPU Test Image"
+#       echo "Image: $${IMAGE_REGISTRY}/$${IMAGE_NAME}:$${VLLM_IMAGE_TAG}"
+#       echo "buildkitd address: $${BUILDKITD_ADDR}"
+
+#       git config --global url."https://gh-proxy.test.osinfra.cn/https://github.com/".insteadOf "https://github.com/"
+
+#       if ! command -v buildctl &> /dev/null; then
+#         echo "Installing buildctl..."
+#         mkdir -p /tmp/buildkit
+#         BUILDKIT_VERSION="v0.29.0"
+#         wget -q "https://gh-proxy.test.osinfra.cn/https://github.com/moby/buildkit/releases/download/$${BUILDKIT_VERSION}/buildkit-$${BUILDKIT_VERSION}.linux-arm64.tar.gz" -O /tmp/buildkit.tar.gz
+#         tar -xzf /tmp/buildkit.tar.gz -C /tmp/buildkit
+#         cp /tmp/buildkit/bin/buildctl /usr/local/bin/
+#       fi
+
+#       export DOCKER_CONFIG=/home/user/.docker
+#       buildctl \
+#         --addr="$${BUILDKITD_ADDR}" \
+#         --tlscacert=/home/user/.docker/ca.pem \
+#         --tlscert=/home/user/.docker/cert.pem \
+#         --tlskey=/home/user/.docker/key.pem \
+#         build \
+#         --frontend dockerfile.v0 \
+#         --local context=. \
+#         --local dockerfile=./docker \
+#         --opt filename=Dockerfile.npu.ci.a3 \
+#         --secret id=dockerconfig,src=/home/user/.docker/config.json \
+#         --output type=image,name=$${IMAGE_REGISTRY}/$${IMAGE_NAME}:$${VLLM_IMAGE_TAG},push=true \
+#         --progress=plain
+
+#       echo "--- Image pushed successfully"
+#       echo "$${IMAGE_REGISTRY}/$${IMAGE_NAME}:$${VLLM_IMAGE_TAG}"
+
+#   # - label: "Upload Ready Pipeline - A3"
+#   #   depends_on: image-build-a3
+#   #   key: upload-ready-pipeline-a3
+#   #   if: build.branch != "main" && build.pull_request.labels includes "npu-test"
+#   #   agents:
+#   #     queue: "ascend-a3"
+#   #     resource_class: "npu-2"
+#   #   command: |
+#   #     buildkite-agent pipeline upload .buildkite/test-npu-ready.yaml
+
+  # # L4 Test — main+NIGHTLY=1 (scheduled), or PR with specific label (e.g. add label then Rebuild)
+  # - label: "Upload Nightly Pipeline"
+  #   depends_on: image-build
+  #   key: upload-nightly-pipeline
+  #   if: >-
+  #     (build.branch == "main" && build.env("NIGHTLY") == "1") ||
+  #     (build.branch != "main" && (
+  #       build.pull_request.labels includes "nightly-test" ||
+  #       build.pull_request.labels includes "omni-test" ||
+  #       build.pull_request.labels includes "tts-test" ||
+  #       build.pull_request.labels includes "diffusion-x2iat-test" ||
+  #       build.pull_request.labels includes "diffusion-x2v-test"
+  #     ))
+  #   commands:
+  #     - buildkite-agent pipeline upload .buildkite/test-npu-nightly.yaml
+  #   agents:
+  #     queue: "ascend-a3"
+  #     resource_class: "npu-2"

.buildkite/pipeline-npu.yaml

@@ -0,0 +1,112 @@
+steps:
+  - label: ":buildkit: Build and Push NPU Test Image - A2"
+    key: image-build
+    agents:
+      queue: "ascend-a2b3"
+      resource_class: "npu-1"
+    plugins:
+      - kubernetes:
+          metadata:
+            annotations:
+              vault.hashicorp.com/agent-init-first: "true"
+              vault.hashicorp.com/agent-inject: "true"
+              vault.hashicorp.com/agent-inject-perms-ca.pem: "0400"
+              vault.hashicorp.com/agent-inject-perms-cert.pem: "0400"
+              vault.hashicorp.com/agent-inject-perms-config.json: "0400"
+              vault.hashicorp.com/agent-inject-perms-key.pem: "0400"
+              vault.hashicorp.com/agent-inject-secret-ca.pem: internal/data/ascend/buildkitd
+              vault.hashicorp.com/agent-inject-secret-cert.pem: internal/data/ascend/buildkitd
+              vault.hashicorp.com/agent-inject-secret-config.json: internal/data/ascend/buildkitd
+              vault.hashicorp.com/agent-inject-secret-key.pem: internal/data/ascend/buildkitd
+              vault.hashicorp.com/agent-inject-template-ca.pem: "{{- with secret \"internal/data/ascend/buildkitd\" -}}\n{{ .Data.data.RootCA }}\n{{- end }}"
+              vault.hashicorp.com/agent-inject-template-cert.pem: "{{- with secret \"internal/data/ascend/buildkitd\" -}}\n{{ .Data.data.ClientCaCert }}\n{{- end }}"
+              vault.hashicorp.com/agent-inject-template-config.json: "{{- with secret \"internal/data/ascend/buildkitd\" -}}\n{{ .Data.data.dockerConfig }}\n{{- end }}"
+              vault.hashicorp.com/agent-inject-template-key.pem: "{{- with secret \"internal/data/ascend/buildkitd\" -}}\n{{ .Data.data.ClientCaKey }}\n{{- end }}"
+              vault.hashicorp.com/agent-pre-populate-only: "true"
+              vault.hashicorp.com/agent-run-as-group: "1000"
+              vault.hashicorp.com/agent-run-as-user: "1000"
+              vault.hashicorp.com/agent-service-account-token-volume-name: token-vol
+              vault.hashicorp.com/role: ascend-gha-runners
+              vault.hashicorp.com/secret-volume-path: /home/user/.docker/
+              vault.hashicorp.com/tls-skip-verify: "true"
+          podSpecPatch:
+            volumes:
+            - name: token-vol
+              projected:
+                defaultMode: 420
+                sources:
+                - serviceAccountToken:
+                    audience: api
+                    expirationSeconds: 600
+                    path: token
+    env:
+      VLLM_IMAGE_TAG: "${BUILDKITE_COMMIT}"
+      IMAGE_NAME: "vllm-omni-ci-npu"
+      IMAGE_REGISTRY: "swr.cn-southwest-2.myhuaweicloud.com/modelfoundry"
+      BUILDKITD_ADDR: "tcp://buildkitd-service.buildkitd:1234"
+    command: |
+      set -ex
+
+      echo "--- Building and pushing NPU Test Image"
+      echo "Image: $${IMAGE_REGISTRY}/$${IMAGE_NAME}:$${VLLM_IMAGE_TAG}"
+      echo "buildkitd address: $${BUILDKITD_ADDR}"
+
+      if ! command -v buildctl &> /dev/null; then
+        echo "Installing buildctl..."
+        mkdir -p /tmp/buildkit
+        BUILDKIT_VERSION="v0.29.0"
+        wget -q "https://github.com/moby/buildkit/releases/download/$${BUILDKIT_VERSION}/buildkit-$${BUILDKIT_VERSION}.linux-arm64.tar.gz" -O /tmp/buildkit.tar.gz
+        tar -xzf /tmp/buildkit.tar.gz -C /tmp/buildkit
+        cp /tmp/buildkit/bin/buildctl /usr/local/bin/
+      fi
+
+      export DOCKER_CONFIG=/home/user/.docker
+      buildctl \
+        --addr="$${BUILDKITD_ADDR}" \
+        --tlscacert=/home/user/.docker/ca.pem \
+        --tlscert=/home/user/.docker/cert.pem \
+        --tlskey=/home/user/.docker/key.pem \
+        build \
+        --frontend dockerfile.v0 \
+        --local context=. \
+        --local dockerfile=./docker \
+        --opt filename=Dockerfile.npu.ci \
+        --secret id=dockerconfig,src=/home/user/.docker/config.json \
+        --output type=image,name=$${IMAGE_REGISTRY}/$${IMAGE_NAME}:$${VLLM_IMAGE_TAG},push=true \
+        --progress=plain
+
+      echo "--- Image pushed successfully"
+      echo "$${IMAGE_REGISTRY}/$${IMAGE_NAME}:$${VLLM_IMAGE_TAG}"
+
+  - label: "Upload Ready Pipeline"
+    depends_on: image-build
+    key: upload-ready-pipeline
+    if: >-
+      build.branch != "main" && (
+        build.pull_request.labels includes "npu-test" ||
+        build.pull_request.labels includes "ready"
+      )
+    agents:
+      queue: "ascend-a2b3"
+      resource_class: "npu-1"
+    command: |
+      buildkite-agent pipeline upload .buildkite/test-npu-ready.yaml
+
+  # L4 Test — main+NIGHTLY=1 (scheduled), or PR with specific label (e.g. add label then Rebuild)
+  - label: "Upload Nightly Pipeline"
+    depends_on: image-build
+    key: upload-nightly-pipeline
+    if: >-
+      (build.branch == "main" && build.env("NIGHTLY") == "1") ||
+      (build.branch != "main" && (
+        build.pull_request.labels includes "nightly-test" ||
+        build.pull_request.labels includes "omni-test" ||
+        build.pull_request.labels includes "tts-test" ||
+        build.pull_request.labels includes "diffusion-x2iat-test" ||
+        build.pull_request.labels includes "diffusion-x2v-test"
+      ))
+    commands:
+      - buildkite-agent pipeline upload .buildkite/test-npu-nightly.yaml
+    agents:
+      queue: "ascend-a2b3"
+      resource_class: "npu-1"

.buildkite/rebase-pipeline.yaml

@@ -0,0 +1,38 @@
+steps:
+  - label: ":docker: Build image"
+    key: image-build
+    commands:
+      - "aws ecr-public get-login-password --region us-east-1 | docker login --username AWS --password-stdin public.ecr.aws/q9t5s3a7"
+      - "docker build --progress=plain --file docker/Dockerfile.ci -t vllm-omni-ci ."
+      - "docker tag vllm-omni-ci public.ecr.aws/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT"
+      - "docker push public.ecr.aws/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT"
+    agents:
+      queue: "cpu_queue_premerge"
+
+  # L2 Test
+  - label: "Upload Ready Pipeline"
+    depends_on: image-build
+    key: upload-ready-pipeline
+    commands:
+      - buildkite-agent pipeline upload .buildkite/test-ready.yml
+    agents:
+      queue: "cpu_queue_premerge"
+
+  # L3 Test
+  - label: "Upload Merge Pipeline"
+    depends_on: image-build
+    key: upload-merge-pipeline
+    commands:
+      - buildkite-agent pipeline upload .buildkite/test-merge.yml
+    agents:
+      queue: "cpu_queue_premerge"
+
+  # L4 Test
+  - label: "Upload Nightly Pipeline"
+    depends_on: image-build
+    key: upload-nightly-pipeline
+    if: build.env("NIGHTLY") == "1"
+    commands:
+      - buildkite-agent pipeline upload .buildkite/test-nightly.yml
+    agents:
+      queue: "cpu_queue_premerge"

.buildkite/release-pipeline.yaml

@@ -1,38 +1,110 @@
 steps:
-  - label: ":docker: Build image"
-    key: image-build
-    commands:
-      - "aws ecr-public get-login-password --region us-east-1 | docker login --username AWS --password-stdin public.ecr.aws/q9t5s3a7"
-      - "docker build --progress=plain --file docker/Dockerfile.ci -t vllm-omni-ci ."
-      - "docker tag vllm-omni-ci public.ecr.aws/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT"
-      - "docker push public.ecr.aws/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT"
-    agents:
-      queue: "cpu_queue_premerge"
+  - input: "Provide Release version here"
+    id: input-release-version
+    fields:
+      - text: "What is the release version?"
+        key: release-version
 
-  # L2 Test
-  - label: "Upload Ready Pipeline"
-    depends_on: image-build
-    key: upload-ready-pipeline
-    commands:
-      - buildkite-agent pipeline upload .buildkite/test-ready.yml
+  - label: "Build and upload wheel"
+    depends_on: ~
+    key: "build-wheel"
     agents:
-      queue: "cpu_queue_premerge"
+      queue: cpu_queue_release
+    commands:
+      - "curl -LsSf https://astral.sh/uv/install.sh | sh"
+      - 'export PATH="$HOME/.local/bin:$PATH"'
+      - "uv venv --python=3.12 && source .venv/bin/activate"
+      - "uv pip install --upgrade build"
+      - "python3 -m build"
+      - "bash .buildkite/scripts/upload-nightly-wheels.sh"
 
-  # L3 Test
-  - label: "Upload Merge Pipeline"
-    depends_on: image-build
-    key: upload-merge-pipeline
-    commands:
-      - buildkite-agent pipeline upload .buildkite/test-merge.yml
+  - label: "Generate and upload wheel indices"
+    depends_on: "build-wheel"
+    allow_dependency_failure: true
     agents:
-      queue: "cpu_queue_premerge"
+      queue: small_cpu_queue_release
+    commands:
+      - "bash .buildkite/scripts/generate-and-upload-nightly-index.sh"
 
-  # L4 Test
-  - label: "Upload Nightly Pipeline"
-    depends_on: image-build
-    key: upload-nightly-pipeline
-    if: build.env("NIGHTLY") == "1"
-    commands:
-      - buildkite-agent pipeline upload .buildkite/test-nightly.yml
+  - block: "Upload release wheels to PyPI"
+    depends_on: "build-wheel"
+    key: block-upload-release-wheels
+
+  - label: "Upload release wheels to PyPI"
+    depends_on:
+      - block-upload-release-wheels
+      - input-release-version
+    key: upload-release-wheels
     agents:
-      queue: "cpu_queue_premerge"
+      queue: small_cpu_queue_release
+    commands:
+      - "bash .buildkite/scripts/publish-release-wheels-pypi.sh"
+
+  - block: "Unblock to build release Docker images"
+    depends_on: ~
+    key: block-build-release-images
+
+  - group: "Build release Docker images"
+    key: "build-release-images"
+    depends_on: block-build-release-images
+    allow_dependency_failure: true
+    steps:
+      - label: "Build release image - x86_64"
+        key: build-release-image-x86
+        depends_on: ~
+        agents:
+          queue: cpu_queue_release
+        commands:
+          - "aws ecr-public get-login-password --region us-east-1 | docker login --username AWS --password-stdin public.ecr.aws/q9t5s3a7"
+          - |
+            DOCKER_BUILDKIT=1 docker build \
+              --build-arg max_jobs=16 \
+              --tag public.ecr.aws/q9t5s3a7/vllm-omni-release-repo:$BUILDKITE_COMMIT-$(uname -m) \
+              --progress plain \
+              -f docker/Dockerfile.cuda .
+          - "docker push public.ecr.aws/q9t5s3a7/vllm-omni-release-repo:$BUILDKITE_COMMIT-$(uname -m)"
+          # re-tag to default image tag and push, just in case arm64 build fails
+          - "docker tag public.ecr.aws/q9t5s3a7/vllm-omni-release-repo:$BUILDKITE_COMMIT-$(uname -m) public.ecr.aws/q9t5s3a7/vllm-omni-release-repo:$BUILDKITE_COMMIT"
+          - "docker push public.ecr.aws/q9t5s3a7/vllm-omni-release-repo:$BUILDKITE_COMMIT"
+        env:
+          DOCKER_BUILDKIT: "1"
+
+      - label: "Build release image - aarch64"
+        key: build-release-image-arm64
+        depends_on: ~
+        agents:
+          queue: arm64_cpu_queue_release
+        commands:
+          - "aws ecr-public get-login-password --region us-east-1 | docker login --username AWS --password-stdin public.ecr.aws/q9t5s3a7"
+          - |
+            DOCKER_BUILDKIT=1 docker build \
+              --build-arg max_jobs=16 \
+              --tag public.ecr.aws/q9t5s3a7/vllm-omni-release-repo:$BUILDKITE_COMMIT-$(uname -m) \
+              --progress plain \
+              -f docker/Dockerfile.cuda .
+          - "docker push public.ecr.aws/q9t5s3a7/vllm-omni-release-repo:$BUILDKITE_COMMIT-$(uname -m)"
+        env:
+          DOCKER_BUILDKIT: "1"
+
+  - block: "Publish release images to DockerHub"
+    key: block-publish-release-images
+    depends_on:
+      - build-release-image-x86
+      - build-release-image-arm64
+      - input-release-version
+
+  - label: "Publish release images to DockerHub"
+    depends_on:
+      - block-publish-release-images
+    key: publish-release-images-dockerhub
+    agents:
+      queue: small_cpu_queue_release
+    commands:
+      - "bash .buildkite/scripts/publish-release-images.sh"
+    plugins:
+      - docker-login#v3.0.0:
+          username: vllmbot
+          password-env: DOCKERHUB_TOKEN
+    env:
+      DOCKER_BUILDKIT: "1"
+      DOCKERHUB_USERNAME: "vllmbot"

.buildkite/scripts/hardware_ci/run-xpu-test.sh

@@ -52,5 +52,6 @@ time timeout -k 30 30m docker run \
     pip install tblib==3.1.0
     cd /workspace/vllm-omni
     pytest -v -s -m "core_model and xpu and B60"
+    export VLLM_XPU_USE_SAMPLER_KERNEL=0    # NOTE: Remove this after vLLM v0.21.1 is merged. Fixes Qwen2-5 omni-expansion tests.
     pytest -v -s -m "advanced_model and xpu and B60"
 '

.buildkite/scripts/publish-release-images.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+# SPDX-License-Identifier: Apache-2.0
+#
+# Publish release Docker images from ECR to DockerHub.
+# Pulls per-arch images, tags with `latest` and versioned tags, pushes them,
+# then creates and pushes a multi-arch manifest.
+
+set -euo pipefail
+
+RELEASE_VERSION=$(buildkite-agent meta-data get release-version --default "" | sed 's/^v//')
+if [ -z "${RELEASE_VERSION}" ]; then
+  echo "ERROR: release-version metadata not set"
+  exit 1
+fi
+
+COMMIT="$BUILDKITE_COMMIT"
+DOCKERHUB_REPO="vllm/vllm-omni"
+ECR_REPO="public.ecr.aws/q9t5s3a7/vllm-omni-release-repo"
+
+echo "========================================"
+echo "Publishing release images v${RELEASE_VERSION}"
+echo "  Commit: ${COMMIT}"
+echo "========================================"
+
+# Login to ECR to pull staging images
+aws ecr-public get-login-password --region us-east-1 | \
+  docker login --username AWS --password-stdin public.ecr.aws/q9t5s3a7
+
+docker pull "${ECR_REPO}:${COMMIT}-x86_64"
+docker pull "${ECR_REPO}:${COMMIT}-aarch64"
+
+docker tag "${ECR_REPO}:${COMMIT}-x86_64" "${DOCKERHUB_REPO}:latest-x86_64"
+docker tag "${ECR_REPO}:${COMMIT}-x86_64" "${DOCKERHUB_REPO}:v${RELEASE_VERSION}-x86_64"
+docker push "${DOCKERHUB_REPO}:latest-x86_64"
+docker push "${DOCKERHUB_REPO}:v${RELEASE_VERSION}-x86_64"
+
+docker tag "${ECR_REPO}:${COMMIT}-aarch64" "${DOCKERHUB_REPO}:latest-aarch64"
+docker tag "${ECR_REPO}:${COMMIT}-aarch64" "${DOCKERHUB_REPO}:v${RELEASE_VERSION}-aarch64"
+docker push "${DOCKERHUB_REPO}:latest-aarch64"
+docker push "${DOCKERHUB_REPO}:v${RELEASE_VERSION}-aarch64"
+
+docker manifest rm "${DOCKERHUB_REPO}:latest" || true
+docker manifest rm "${DOCKERHUB_REPO}:v${RELEASE_VERSION}" || true
+docker manifest create "${DOCKERHUB_REPO}:latest" "${DOCKERHUB_REPO}:latest-x86_64" "${DOCKERHUB_REPO}:latest-aarch64"
+docker manifest create "${DOCKERHUB_REPO}:v${RELEASE_VERSION}" "${DOCKERHUB_REPO}:v${RELEASE_VERSION}-x86_64" "${DOCKERHUB_REPO}:v${RELEASE_VERSION}-aarch64"
+docker manifest push "${DOCKERHUB_REPO}:latest"
+docker manifest push "${DOCKERHUB_REPO}:v${RELEASE_VERSION}"
+
+echo ""
+echo "Successfully published release images for v${RELEASE_VERSION}"

.buildkite/scripts/publish-release-wheels-pypi.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: Apache-2.0
+
+set -e
+
+BUCKET="vllm-wheels"
+SUBPATH="omni/$BUILDKITE_COMMIT"
+S3_COMMIT_PREFIX="s3://$BUCKET/$SUBPATH/"
+
+RELEASE_VERSION=$(buildkite-agent meta-data get release-version | sed 's/^v//')
+if [[ -z "$RELEASE_VERSION" ]]; then
+  echo "[FATAL] release-version metadata not set."
+  exit 1
+fi
+echo "Release version: $RELEASE_VERSION"
+
+if [[ -z "$PYPI_TOKEN" ]]; then
+  echo "[FATAL] PYPI_TOKEN is not set."
+  exit 1
+else
+  export TWINE_USERNAME="__token__"
+  export TWINE_PASSWORD="$PYPI_TOKEN"
+fi
+
+set -x
+
+if ! command -v uv &> /dev/null; then
+  curl -LsSf https://astral.sh/uv/install.sh | sh
+  export PATH="$HOME/.local/bin:$PATH"
+fi
+
+uv venv --python 3.12 /tmp/vllm-omni-release-env
+source /tmp/vllm-omni-release-env/bin/activate
+uv pip install twine
+
+DIST_DIR=/tmp/vllm-omni-release-dist
+mkdir -p "$DIST_DIR"
+
+echo "Downloading wheels from S3:"
+aws s3 ls "$S3_COMMIT_PREFIX"
+aws s3 cp --recursive --exclude "*" --include "vllm_omni-${RELEASE_VERSION}*.whl" --exclude "*dev*" "$S3_COMMIT_PREFIX" "$DIST_DIR"
+ls -la "$DIST_DIR"
+
+PYPI_WHEEL_FILES=$(find "$DIST_DIR" -name "vllm_omni-${RELEASE_VERSION}*.whl" -not -name "*+*")
+if [[ -z "$PYPI_WHEEL_FILES" ]]; then
+  echo "[FATAL] No wheels found for version ${RELEASE_VERSION}"
+  exit 1
+fi
+
+python3 -m twine check $PYPI_WHEEL_FILES
+python3 -m twine upload --non-interactive --verbose $PYPI_WHEEL_FILES
+echo "Wheels uploaded to PyPI"

.buildkite/scripts/upload_pipeline_with_skip_ci.sh

@@ -1,10 +1,18 @@
 #!/usr/bin/env bash
-# Evaluate docs-only skip-ci and upload continuation steps from the same `.buildkite/pipeline.yml`
+# Evaluate docs-only skip-ci and upload continuation steps from the given pipeline YAML
 # (YAML document after the first `---`). Buildkite `if` is evaluated at upload time.
+#
+# Usage: upload_pipeline_with_skip_ci.sh [pipeline_yaml]
+#   pipeline_yaml: path relative to repo root or absolute (default: .buildkite/pipeline.yml)
 set -euo pipefail
 
 ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
-PIPELINE_YML="${ROOT}/.buildkite/pipeline.yml"
+PIPELINE_ARG="${1:-.buildkite/pipeline.yml}"
+if [[ "${PIPELINE_ARG}" = /* ]]; then
+  PIPELINE_YML="${PIPELINE_ARG}"
+else
+  PIPELINE_YML="${ROOT}/${PIPELINE_ARG}"
+fi
 
 # Prints a single digit to stdout: 1 = skip image CI, 0 = run. Logs go to stderr.
 is_docs_only_change() {
@@ -21,7 +29,7 @@ is_docs_only_change() {
     if [[ "${file_path}" == *.md ]]; then
       continue
     fi
-    if [[ "${file_path}" == "mkdocs.yaml" ]]; then
+    if [[ "${file_path}" == "mkdocs.yml" ]]; then
       continue
     fi
     return 1
@@ -104,12 +112,13 @@ import pathlib
 path = pathlib.Path(os.environ["PIPELINE_YML"])
 text = path.read_text(encoding="utf-8")
 sep = "\n---\n"
-if sep not in text:
-    raise SystemExit(
-        "upload_pipeline_with_skip_ci: .buildkite/pipeline.yml must contain a '\\n---\\n' separator "
-        "(document 1 = bootstrap, document 2 = uploaded steps)"
-    )
-_, continuation = text.split(sep, 1)
+# Two supported layouts:
+#   - multi-doc: doc 1 = bootstrap (loaded by Buildkite), doc 2 (after `---`) = uploaded steps.
+#   - single-doc: whole file is the uploaded steps; caller (UI init step) is the bootstrap.
+if sep in text:
+    _, continuation = text.split(sep, 1)
+else:
+    continuation = text
 
 skip = os.environ.get("SKIP_CI") == "1"
 # When docs-only skip-ci: skip default CI image, but still build for L4 nightly (PR label nightly-test or
@@ -126,7 +135,7 @@ if skip:
 else:
     rep = "'true'"
     ready_rep = "'build.branch != \"main\" && build.pull_request.labels includes \"ready\"'"
-    merge_rep = "'(build.branch == \"main\" && build.env(\"NIGHTLY\") != \"1\") || (build.branch != \"main\" && build.pull_request.labels includes \"merge-test\")'"
+    merge_rep = "'(build.branch == \"main\" && build.env(\"NIGHTLY\") != \"1\" && build.env(\"WEEKLY\") != \"1\") || (build.branch != \"main\" && build.pull_request.labels includes \"merge-test\")'"
 rendered = (
     continuation
     .replace("__IMAGE_BUILD_IF__", rep)

.buildkite/test-amd-merge.yml

@@ -9,16 +9,7 @@ steps:
     - export VLLM_ROCM_USE_AITER=0
     # ignore test_teacache_extractors.py because it use rocm gemm kernel from vLLM
     # that is not supported on CPU
-    - "timeout 20m pytest -v -s -m 'core_model and cpu' --ignore=tests/diffusion/cache/test_teacache_extractors.py --cov=vllm_omni --cov-branch --cov-report=term-missing --cov-report=html --cov-report=xml"
-
-- label: "Diffusion Model Test"
-  agent_pool: mi325_2
-  depends_on: amd-build
-  mirror_hardwares: [amdproduction]
-  grade: Blocking
-  commands:
-    - export GPU_ARCHS=gfx942
-    - timeout 20m pytest -s -v tests/e2e/offline_inference/test_t2i_model.py -m "advanced_model and diffusion" --run-level "advanced_model"
+    - "timeout 60m pytest -v -s -m 'core_model and cpu' --ignore=tests/diffusion/cache/test_teacache_extractors.py --cov=vllm_omni --cov-report=term-missing:skip-covered --cov-report=xml"
 
 - label: "Diffusion Images API LoRA E2E"
   agent_pool: mi325_1
@@ -26,7 +17,7 @@ steps:
   mirror_hardwares: [amdproduction]
   grade: Blocking
   commands:
-    - timeout 20m pytest -s -v tests/e2e/online_serving/test_images_generations_lora.py
+    - timeout 20m pytest -s -v tests/diffusion/lora/test_images_generations_lora.py
 
 - label: "Diffusion Model CPU offloading Test"
   agent_pool: mi325_1
@@ -39,9 +30,9 @@ steps:
     - |
       timeout 20m bash -c '
         set +e
-        pytest -s -v tests/e2e/offline_inference/test_diffusion_cpu_offload.py
+        pytest -s -v tests/diffusion/offloader/test_diffusion_cpu_offload.py
         EXIT1=\$?
-        pytest -s -v tests/e2e/offline_inference/test_diffusion_layerwise_offload.py
+        pytest -s -v tests/diffusion/offloader/test_diffusion_layerwise_offload.py
         EXIT2=\$?
         exit \$((EXIT1 | EXIT2))
       '
@@ -76,7 +67,7 @@ steps:
   commands:
     - export VLLM_LOGGING_LEVEL=DEBUG
     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - timeout 20m pytest -s -v tests/e2e/offline_inference/test_sequence_parallel.py
+    - timeout 20m pytest -s -v tests/diffusion/distributed/test_sequence_parallel.py
     - timeout 20m pytest -s -v tests/diffusion/distributed/test_ulysses_uaa_perf.py
 
 # merge-only tests
@@ -86,7 +77,15 @@ steps:
   mirror_hardwares: [amdproduction]
   grade: Blocking
   commands:
-    - pytest -s -v tests/e2e/offline_inference/test_zimage_parallelism.py
+    - pytest -s -v tests/diffusion/distributed/test_zimage_parallelism.py
+
+- label: "Diffusion Model Test"
+  agent_pool: mi325_1
+  depends_on: amd-build
+  mirror_hardwares: [amdproduction]
+  grade: Blocking
+  commands:
+    - timeout 30m pytest -s -v tests/e2e/offline_inference/test_z_image.py
 
 - label: "Diffusion GPU Worker Test"
   agent_pool: mi325_2
@@ -124,7 +123,6 @@ steps:
   grade: Blocking
   commands:
     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - export VLLM_TEST_CLEAN_GPU_MEMORY=1
     - pytest -s -v tests/e2e/offline_inference/test_qwen3_omni.py tests/e2e/online_serving/test_qwen3_omni.py tests/e2e/online_serving/test_mimo_audio.py -m "advanced_model" --run-level "advanced_model"
 
 - label: "Qwen3-TTS CustomVoice E2E Test"
@@ -155,17 +153,6 @@ steps:
         pytest -s -v tests/e2e/online_serving/test_qwen3_tts_base.py tests/e2e/offline_inference/test_qwen3_tts_base.py -m "advanced_model" --run-level "advanced_model"
       '
 
-- label: "Diffusion Image Edit Test"
-  agent_pool: mi325_1
-  depends_on: amd-build
-  mirror_hardwares: [amdproduction]
-  grade: Blocking
-  commands:
-    - export GPU_ARCHS=gfx942
-    - export VLLM_LOGGING_LEVEL=DEBUG
-    - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - timeout 20m pytest -s -v tests/e2e/online_serving/test_image_gen_edit.py
-
 # TODO: Bagel test on ROCm is very unstable. @tjtanaa
 # Need to debug before reneable numerical changes across large PRs
 # # split Bagel Model Test with H100 (Real Weights) into three tests
@@ -176,11 +163,10 @@ steps:
 #   grade: Blocking
 #   commands:
 #     - export GPU_ARCHS=gfx942
-#     - export VLLM_TEST_CLEAN_GPU_MEMORY=1
 #     - export VLLM_LOGGING_LEVEL=DEBUG
 #     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
 #     - export VLLM_ROCM_USE_AITER_RMSNORM=0
-#     - timeout 30m pytest -s -v tests/e2e/offline_inference/test_bagel_text2img.py -m "advanced_model" --run-level "advanced_model" -k "shared_memory" -k "rocm"
+#     - timeout 30m pytest -s -v tests/e2e/offline_inference/test_bagel.py -m "advanced_model" --run-level "advanced_model" -k "shared_memory" -k "rocm"
 
 # - label: "Bagel Img2Img Model Test (2/3)"
 #   agent_pool: mi325_1
@@ -189,11 +175,10 @@ steps:
 #   grade: Blocking
 #   commands:
 #     - export GPU_ARCHS=gfx942
-#     - export VLLM_TEST_CLEAN_GPU_MEMORY=1
 #     - export VLLM_LOGGING_LEVEL=DEBUG
 #     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
 #     - export VLLM_ROCM_USE_AITER_RMSNORM=0
-#     - timeout 30m pytest -s -v tests/e2e/offline_inference/test_bagel_img2img.py -m "advanced_model" --run-level "advanced_model" -k "rocm"
+#     - timeout 30m pytest -s -v tests/e2e/offline_inference/test_bagel.py -m "advanced_model" --run-level "advanced_model" -k "rocm"
 
 # - label: "Bagel Online Serving Test (3/3)"
 #   agent_pool: mi325_1
@@ -202,12 +187,23 @@ steps:
 #   grade: Blocking
 #   commands:
 #     - export GPU_ARCHS=gfx942
-#     - export VLLM_TEST_CLEAN_GPU_MEMORY=1
 #     - export VLLM_IMAGE_FETCH_TIMEOUT=60
 #     - export VLLM_LOGGING_LEVEL=DEBUG
 #     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
 #     - export VLLM_ROCM_USE_AITER_RMSNORM=0
-#     - timeout 40m pytest -s -v tests/e2e/online_serving/test_bagel_online.py -m "advanced_model" --run-level "advanced_model" -k "rocm"
+#     - timeout 40m pytest -s -v tests/e2e/online_serving/test_bagel.py -m "advanced_model" --run-level "advanced_model" -k "rocm"
+
+- label: "Diffusion · Wan22 Test"
+  agent_pool: mi325_1
+  depends_on: amd-build
+  mirror_hardwares: [amdproduction]
+  grade: Blocking
+  commands:
+    - |
+      timeout 40m bash -c "
+        export VLLM_IMAGE_FETCH_TIMEOUT=60
+        pytest -s -v tests/e2e/offline_inference/test_wan22_t2v.py tests/e2e/online_serving/test_wan22_t2v.py -m 'advanced_model and cuda and diffusion' --run-level 'advanced_model'
+      "
 
 - label: "Voxtral-TTS E2E Test"
   agent_pool: mi325_1

.buildkite/test-amd-ready.yaml

@@ -9,7 +9,7 @@ steps:
     - export VLLM_ROCM_USE_AITER=0
     # ignore test_teacache_extractors.py because it use rocm gemm kernel from vLLM
     # that is not supported on CPU
-    - "timeout 20m pytest -vvvv -s -m 'core_model and cpu' --ignore=tests/diffusion/cache/test_teacache_extractors.py --cov=vllm_omni --cov-branch --cov-report=term-missing --cov-report=html --cov-report=xml"
+    - "timeout 60m pytest -v -s -m 'core_model and cpu' --ignore=tests/diffusion/cache/test_teacache_extractors.py --cov=vllm_omni --cov-report=term-missing:skip-covered --cov-report=xml"
 
 - label: "Voxtral TTS CUDA Unit Test"
   agent_pool: mi325_1
@@ -19,21 +19,13 @@ steps:
   commands:
     - timeout 10m pytest -s -v tests/model_executor/models/voxtral_tts/test_cuda_graph_acoustic_transformer.py
 
-- label: "Diffusion Model Test"
-  agent_pool: mi325_1
-  depends_on: amd-build
-  mirror_hardwares: [amdproduction]
-  grade: Blocking
-  commands:
-    - timeout 30m pytest -s -v tests/e2e/offline_inference/test_t2i_model.py -m "core_model and diffusion" --run-level "core_model"
-
 - label: "Diffusion Batching Test"
   agent_pool: mi325_1
   depends_on: amd-build
   mirror_hardwares: [amdproduction]
   grade: Blocking
   commands:
-    - timeout 20m pytest -s -v tests/e2e/offline_inference/test_qwen_image_diffusion_batching.py -m "core_model and diffusion" --run-level "core_model"
+    - timeout 20m pytest -s -v tests/diffusion/batching/test_diffusion_batching.py -m "core_model and diffusion" --run-level "core_model"
 
 - label: "Custom Pipeline Test"
   agent_pool: mi325_1
@@ -54,9 +46,9 @@ steps:
     - |
       timeout 20m bash -c '
         set +e
-        pytest -s -v tests/e2e/offline_inference/test_diffusion_cpu_offload.py
+        pytest -s -v tests/diffusion/offloader/test_diffusion_cpu_offload.py
         EXIT1=\$?
-        pytest -s -v tests/e2e/offline_inference/test_diffusion_layerwise_offload.py
+        pytest -s -v tests/diffusion/offloader/test_diffusion_layerwise_offload.py
         EXIT2=\$?
         exit \$((EXIT1 | EXIT2))
       '
@@ -73,17 +65,6 @@ steps:
 #     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
 #     - timeout 20m pytest -s -v tests/e2e/offline_inference/test_stable_audio_expansion.py -m "advanced_model and diffusion and L4" --run-level advanced_model
 
-- label: "AudioX Online Test"
-  agent_pool: mi325_1
-  depends_on: amd-build
-  mirror_hardwares: [amdproduction]
-  grade: Blocking
-  commands:
-    - export GPU_ARCHS=gfx942
-    - export VLLM_LOGGING_LEVEL=DEBUG
-    - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - timeout 20m pytest -s -v tests/e2e/online_serving/test_audiox_online.py
-
 - label: "Diffusion Cache Backend Test"
   agent_pool: mi325_1
   depends_on: amd-build
@@ -103,7 +84,7 @@ steps:
   commands:
     - export VLLM_LOGGING_LEVEL=DEBUG
     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - timeout 20m pytest -s -v tests/e2e/offline_inference/test_sequence_parallel.py -m core_model
+    - timeout 20m pytest -s -v tests/diffusion/distributed/test_sequence_parallel.py -m core_model
 
 - label: "Diffusion GPU Worker Test"
   agent_pool: mi325_2
@@ -113,6 +94,27 @@ steps:
   commands:
     - timeout 20m pytest -s -v tests/diffusion/test_diffusion_worker.py
 
+- label: "Diffusion · Model Test"
+  agent_pool: mi325_1
+  depends_on: amd-build
+  mirror_hardwares: [amdproduction]
+  grade: Blocking
+  commands:
+    - timeout 15m pytest -sv tests/diffusion/models/ -m 'core_model and cuda' --run-level "core_model"
+
+- label: "Diffusion · Wan22 Test"
+  agent_pool: mi325_1
+  depends_on: amd-build
+  mirror_hardwares: [amdproduction]
+  grade: Blocking
+  commands:
+    - |
+      timeout 40m bash -c "
+        export VLLM_TEST_CLEAN_GPU_MEMORY=1
+        export VLLM_IMAGE_FETCH_TIMEOUT=60
+        pytest -s -v tests/e2e/online_serving/test_wan22_t2v.py -m 'core_model' --run-level 'core_model'
+      "
+
 - label: "Engine Test"
   agent_pool: mi325_1
   depends_on: amd-build
@@ -133,7 +135,6 @@ steps:
 #   commands:
 #     - export VLLM_LOGGING_LEVEL=DEBUG
 #     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-#     - export VLLM_TEST_CLEAN_GPU_MEMORY=1
 #     - timeout 10m pytest -s -v tests/e2e/offline_inference/test_qwen3_omni.py
 #     - timeout 20m pytest -s -v tests/e2e/online_serving/test_qwen3_omni.py -m "core_model" --run-level "core_model"
 
@@ -175,17 +176,6 @@ steps:
         pytest -s -v tests/e2e/offline_inference/test_voxtral_tts.py -m "advanced_model" --run-level "advanced_model"
       '
 
-- label: "Diffusion Image Edit Test"
-  agent_pool: mi325_1
-  depends_on: amd-build
-  mirror_hardwares: [amdproduction]
-  grade: Blocking
-  commands:
-    - export GPU_ARCHS=gfx942
-    - export VLLM_LOGGING_LEVEL=DEBUG
-    - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - timeout 20m pytest -s -v tests/e2e/online_serving/test_image_gen_edit.py
-
 # TODO: Bagel test on ROCm is very unstable. @tjtanaa
 # Need to debug before reneable numerical changes across large PRs
 # - label: "Bagel Text2Img Model Test"
@@ -195,11 +185,10 @@ steps:
 #   grade: Blocking
 #   commands:
 #     - export GPU_ARCHS=gfx942
-#     - export VLLM_TEST_CLEAN_GPU_MEMORY=1
 #     - export VLLM_LOGGING_LEVEL=DEBUG
 #     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
 #     - export VLLM_ROCM_USE_AITER_RMSNORM=0
-#     - timeout 30m pytest -s -v tests/e2e/offline_inference/test_bagel_text2img.py -m "core_model" --run-level "core_model" -k "rocm"
+#     - timeout 30m pytest -s -v tests/e2e/offline_inference/test_bagel.py -m "core_model" --run-level "core_model" -k "rocm"
 
 # - label: "Bagel Img2Img Model Test"
 #   agent_pool: mi325_1
@@ -208,11 +197,10 @@ steps:
 #   grade: Blocking
 #   commands:
 #     - export GPU_ARCHS=gfx942
-#     - export VLLM_TEST_CLEAN_GPU_MEMORY=1
 #     - export VLLM_LOGGING_LEVEL=DEBUG
 #     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
 #     - export VLLM_ROCM_USE_AITER_RMSNORM=0
-#     - timeout 30m pytest -s -v tests/e2e/offline_inference/test_bagel_img2img.py -m "core_model" --run-level "core_model" -k "rocm"
+#     - timeout 30m pytest -s -v tests/e2e/offline_inference/test_bagel.py -m "core_model" --run-level "core_model" -k "rocm"
 
 # - label: "Bagel Online Serving Test"
 #   agent_pool: mi325_1
@@ -221,12 +209,11 @@ steps:
 #   grade: Blocking
 #   commands:
 #     - export GPU_ARCHS=gfx942
-#     - export VLLM_TEST_CLEAN_GPU_MEMORY=1
 #     - export VLLM_IMAGE_FETCH_TIMEOUT=60
 #     - export VLLM_LOGGING_LEVEL=DEBUG
 #     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
 #     - export VLLM_ROCM_USE_AITER_RMSNORM=0
-#     - timeout 40m pytest -s -v tests/e2e/online_serving/test_bagel_online.py -m "core_model" --run-level "core_model" -k "rocm"
+#     - timeout 40m pytest -s -v tests/e2e/online_serving/test_bagel.py -m "core_model" --run-level "core_model" -k "rocm"
 
 - label: "CosyVoice3-TTS E2E Test"
   agent_pool: mi325_1
@@ -236,5 +223,5 @@ steps:
   commands:
     - |
       timeout 20m bash -c '
-        pytest -s -v tests/e2e/online_serving/test_cosyvoice3_tts.py -m "core_model" --run-level "core_model"
+        pytest -s -v tests/e2e/online_serving/test_cosyvoice3_tts_expansion.py -m "full_model" --run-level "core_model"
       '

.buildkite/test-amd.yaml

@@ -8,7 +8,7 @@ steps:
   grade: Blocking
   commands:
     - export GPU_ARCHS=gfx942
-    - pytest -s -v tests/e2e/offline_inference/test_t2i_model.py
+    - pytest -s -v tests/e2e/offline_inference/test_z_image.py
 
 - label: "Diffusion Images API LoRA E2E"
   timeout_in_minutes: 30
@@ -20,7 +20,7 @@ steps:
     - export GPU_ARCHS=gfx942
     - export VLLM_LOGGING_LEVEL=DEBUG
     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - pytest -s -v tests/e2e/online_serving/test_images_generations_lora.py
+    - pytest -s -v tests/diffusion/lora/test_images_generations_lora.py
 
 - label: "Diffusion Model CPU offloading Test"
   timeout_in_minutes: 20
@@ -32,8 +32,8 @@ steps:
     - export GPU_ARCHS=gfx942
     - export VLLM_LOGGING_LEVEL=DEBUG
     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - pytest -s -v tests/e2e/offline_inference/test_diffusion_cpu_offload.py
-    - pytest -s -v tests/e2e/offline_inference/test_diffusion_layerwise_offload.py
+    - pytest -s -v tests/diffusion/offloader/test_diffusion_cpu_offload.py
+    - pytest -s -v tests/diffusion/offloader/test_diffusion_layerwise_offload.py
 
 - label: "Diffusion Cache Backend Test"
   timeout_in_minutes: 15
@@ -57,7 +57,7 @@ steps:
     - export GPU_ARCHS=gfx942
     - export VLLM_LOGGING_LEVEL=DEBUG
     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - pytest -s -v tests/e2e/offline_inference/test_sequence_parallel.py -m core_model
+    - pytest -s -v tests/diffusion/distributed/test_sequence_parallel.py -m core_model
 
 - label: "Diffusion Tensor Parallelism Test"
   timeout_in_minutes: 20
@@ -67,7 +67,7 @@ steps:
     - export GPU_ARCHS=gfx942
     - export VLLM_LOGGING_LEVEL=DEBUG
     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - pytest -s -v tests/e2e/offline_inference/test_zimage_parallelism.py
+    - pytest -s -v tests/diffusion/distributed/test_zimage_parallelism.py
 
 - label: "Diffusion GPU Worker Test"
   timeout_in_minutes: 20
@@ -100,25 +100,11 @@ steps:
   commands:
     - export VLLM_LOGGING_LEVEL=DEBUG
     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - export VLLM_TEST_CLEAN_GPU_MEMORY="1"
     - export VLLM_ROCM_USE_AITER=0
     - pytest -s -v tests/e2e/offline_inference/test_qwen3_omni.py
     - pytest -s -v tests/e2e/online_serving/test_qwen3_omni.py
 
 
-- label: "Diffusion Image Edit Test"
-  timeout_in_minutes: 15
-  agent_pool: mi325_1
-  depends_on: amd-build
-  mirror_hardwares: [amdproduction]
-  grade: Blocking
-  commands:
-    - export GPU_ARCHS=gfx942
-    - export VLLM_LOGGING_LEVEL=DEBUG
-    - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - pytest -s -v tests/e2e/online_serving/test_image_gen_edit.py
-
-
 - label: "Omni Sleep Mode Test"
   timeout_in_minutes: 40
   agent_pool: mi325_2
@@ -129,5 +115,4 @@ steps:
     - export GPU_ARCHS=gfx942
     - export VLLM_LOGGING_LEVEL=DEBUG
     - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    - export VLLM_TEST_CLEAN_GPU_MEMORY="1"
-    - pytest -s -v tests/e2e/offline_inference/test_omni_sleep_mode.py -m "advanced_model and omni and MI325" --run-level "advanced_model"
+    - pytest -s -v tests/entrypoints/test_omni_sleep_mode.py -m "advanced_model and omni and MI325" --run-level "advanced_model"

.buildkite/test-nightly.yml

@@ -1,5 +1,6 @@
 env:
   VLLM_WORKER_MULTIPROC_METHOD: spawn
+  VLLM_USE_FLASHINFER_MOE_FP16: 0
   HF_HUB_DOWNLOAD_TIMEOUT: 300
   HF_HUB_ETAG_TIMEOUT: 60
 
@@ -13,7 +14,7 @@ steps:
       - label: ":full_moon: Omni · Function Test with H100"
         timeout_in_minutes: 90
         commands:
-          - pytest -s -v tests/e2e/ -m "full_model and H100 and omni" --run-level "full_model" --ignore=tests/e2e/accuracy
+          - pytest -sv tests/e2e --run-level "full_model" -m "full_model and H100 and omni" --ignore=tests/e2e/accuracy --ignore=tests/e2e/online_serving/test_qwen3_omni_multi_replicas.py
         agents:
           queue: "mithril-h100-pool"
         plugins:
@@ -169,14 +170,104 @@ steps:
                       path: /mnt/hf-cache
                       type: DirectoryOrCreate
 
-      - label: ":full_moon: Omni · Perf Test"
-        key: nightly-omni-performance
+      - label: ":full_moon: Omni · Perf Test · No Async Chunk"
+        key: nightly-omni-performance-no-async-chunk
         timeout_in_minutes: 180
         commands:
           - export BENCHMARK_DIR=tests/dfx/perf/results
           - |
             set +e
-            pytest -s -v tests/dfx/perf/scripts/run_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen_omni.json
+            pytest -s -v tests/dfx/perf/scripts/run_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen3_omni_no_async_chunk.json
+            EXIT=$$?
+            buildkite-agent artifact upload "tests/dfx/perf/results/*.json"
+            exit $$EXIT
+        agents:
+          queue: "mithril-h100-pool"
+        plugins:
+          - kubernetes:
+              podSpec:
+                containers:
+                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+                    resources:
+                      limits:
+                        nvidia.com/gpu: 2
+                    volumeMounts:
+                      - name: devshm
+                        mountPath: /dev/shm
+                      - name: hf-cache
+                        mountPath: /root/.cache/huggingface
+                    env:
+                      - name: HF_HOME
+                        value: /root/.cache/huggingface
+                      - name: HF_TOKEN
+                        valueFrom:
+                          secretKeyRef:
+                            name: hf-token-secret
+                            key: token
+                nodeSelector:
+                  node.kubernetes.io/instance-type: gpu-h100-sxm
+                volumes:
+                  - name: devshm
+                    emptyDir:
+                      medium: Memory
+                  - name: hf-cache
+                    hostPath:
+                      path: /mnt/hf-cache
+                      type: DirectoryOrCreate
+
+      - label: ":full_moon: Omni · Perf Test · Async Chunk"
+        key: nightly-omni-performance-async-chunk
+        timeout_in_minutes: 180
+        commands:
+          - export BENCHMARK_DIR=tests/dfx/perf/results
+          - |
+            set +e
+            pytest -s -v tests/dfx/perf/scripts/run_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen3_omni_async_chunk.json
+            EXIT=$$?
+            buildkite-agent artifact upload "tests/dfx/perf/results/*.json"
+            exit $$EXIT
+        agents:
+          queue: "mithril-h100-pool"
+        plugins:
+          - kubernetes:
+              podSpec:
+                containers:
+                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+                    resources:
+                      limits:
+                        nvidia.com/gpu: 2
+                    volumeMounts:
+                      - name: devshm
+                        mountPath: /dev/shm
+                      - name: hf-cache
+                        mountPath: /root/.cache/huggingface
+                    env:
+                      - name: HF_HOME
+                        value: /root/.cache/huggingface
+                      - name: HF_TOKEN
+                        valueFrom:
+                          secretKeyRef:
+                            name: hf-token-secret
+                            key: token
+                nodeSelector:
+                  node.kubernetes.io/instance-type: gpu-h100-sxm
+                volumes:
+                  - name: devshm
+                    emptyDir:
+                      medium: Memory
+                  - name: hf-cache
+                    hostPath:
+                      path: /mnt/hf-cache
+                      type: DirectoryOrCreate
+
+      - label: ":full_moon: Omni · Perf Test · vLLM Text"
+        key: nightly-omni-performance-vllm-text
+        timeout_in_minutes: 180
+        commands:
+          - export BENCHMARK_DIR=tests/dfx/perf/results
+          - |
+            set +e
+            pytest -s -v tests/dfx/perf/scripts/run_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen3_omni_vllm_text.json
             EXIT=$$?
             buildkite-agent artifact upload "tests/dfx/perf/results/*.json"
             exit $$EXIT
@@ -218,7 +309,7 @@ steps:
       - label: ":full_moon: Omni · Multi-Replica Startup Test with 4x H100"
         timeout_in_minutes: 45
         commands:
-          - pytest -s -v tests/e2e/online_serving/test_qwen3_omni_multi_replicas.py -m "core_model" --run-level "core_model"
+          - pytest -s -v tests/e2e/online_serving/test_qwen3_omni_multi_replicas.py -m "full_model" --run-level "core_model"
         agents:
           queue: "mithril-h100-pool"
         plugins:
@@ -262,7 +353,7 @@ steps:
         timeout_in_minutes: 90
         commands:
           - export VLLM_ALLOW_LONG_MAX_MODEL_LEN="1"
-          - pytest -s -v tests/e2e/ -m "full_model and L4 and omni" -k "not test_qwen2_5" --run-level "full_model" --ignore=tests/e2e/accuracy
+          - pytest -s -v tests/e2e/ -m "full_model and L4 and tts" --run-level "full_model" --ignore=tests/e2e/accuracy
         agents:
           queue: "gpu_1_queue" # g6.12xlarge instance on AWS, has 4 L4 GPU
         plugins:
@@ -298,7 +389,7 @@ steps:
                   - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
                     resources:
                       limits:
-                        nvidia.com/gpu: 1
+                        nvidia.com/gpu: 2
                     volumeMounts:
                       - name: devshm
                         mountPath: /dev/shm
@@ -332,13 +423,65 @@ steps:
       build.pull_request.labels includes "nightly-test" ||
       build.pull_request.labels includes "diffusion-x2iat-test"
     steps:
-      - label: ":full_moon: Diffusion X2I(&A&T) · Function Test with H100"
+      # Use explicit file shards so single-card cases do not reserve 2+ GPUs,
+      # and Bagel feature coverage is not duplicated via a broad tests/e2e sweep.
+      - label: ":full_moon: Diffusion X2I(&A&T) · Function Test with H100 · Single-GPU"
         timeout_in_minutes: 120
         commands:
-          - pytest -sv tests/e2e/ -k "not test_wan and not test_bagel_expansion and not hunyuan" -m "full_model and diffusion and H100" --run-level "full_model" --ignore=tests/e2e/accuracy
-          # revoke after bagel optimization finished
-          # Keep Bagel expansion and multi-replica tests in their dedicated H100 jobs below.
-          # - pytest -sv tests/e2e/ -k "not test_wan and not test_bagel_expansion and not hunyuan" -m "full_model and diffusion and H100" --run-level "full_model" --ignore=tests/e2e/accuracy --ignore=tests/e2e/online_serving/test_bagel_multi_replicas.py
+          - >-
+            pytest -sv
+            tests/e2e/online_serving/test_qwen_image_expansion.py
+            tests/e2e/online_serving/test_qwen_image_edit_expansion.py
+            tests/e2e/online_serving/test_qwen_image_layered_expansion.py
+            tests/e2e/online_serving/test_longcat_image_expansion.py
+            tests/e2e/online_serving/test_longcat_image_edit_expansion.py
+            tests/e2e/online_serving/test_flux_2_dev_expansion.py
+            tests/e2e/online_serving/test_bagel_expansion.py
+            -m "full_model and diffusion and H100 and not distributed_cuda"
+            --run-level "full_model"
+        agents:
+          queue: "mithril-h100-pool"
+        plugins:
+          - kubernetes:
+              podSpec:
+                containers:
+                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+                    resources:
+                      limits:
+                        nvidia.com/gpu: 1
+                    volumeMounts:
+                      - name: devshm
+                        mountPath: /dev/shm
+                      - name: hf-cache
+                        mountPath: /root/.cache/huggingface
+                    env:
+                      - name: HF_HOME
+                        value: /root/.cache/huggingface
+                      - name: HF_TOKEN
+                        valueFrom:
+                          secretKeyRef:
+                            name: hf-token-secret
+                            key: token
+                nodeSelector:
+                  node.kubernetes.io/instance-type: gpu-h100-sxm
+                volumes:
+                  - name: devshm
+                    emptyDir:
+                      medium: Memory
+                  - name: hf-cache
+                    hostPath:
+                      path: /mnt/hf-cache
+                      type: DirectoryOrCreate
+
+      - label: ":full_moon: Diffusion X2I(&A&T) · Function Test with H100 · Multi-GPU Qwen-Image"
+        timeout_in_minutes: 120
+        commands:
+          - >-
+            pytest -sv
+            tests/e2e/online_serving/test_qwen_image_expansion.py
+            tests/e2e/online_serving/test_qwen_image_edit_expansion.py
+            -m "full_model and diffusion and H100 and distributed_cuda"
+            --run-level "full_model"
         agents:
           queue: "mithril-h100-pool"
         plugins:
@@ -373,10 +516,59 @@ steps:
                       path: /mnt/hf-cache
                       type: DirectoryOrCreate
 
-      - label: ":full_moon: Diffusion X2I(&A&T) · Bagel Function Test with H100"
+      - label: ":full_moon: Diffusion X2I(&A&T) · Function Test with H100 · Multi-GPU Layered/LongCat/FLUX"
+        timeout_in_minutes: 90
+        commands:
+          - >-
+            pytest -sv
+            tests/e2e/online_serving/test_qwen_image_layered_expansion.py
+            tests/e2e/online_serving/test_longcat_image_expansion.py
+            tests/e2e/online_serving/test_longcat_image_edit_expansion.py
+            tests/e2e/online_serving/test_flux_2_dev_expansion.py
+            -m "full_model and diffusion and H100 and distributed_cuda"
+            --run-level "full_model"
+        agents:
+          queue: "mithril-h100-pool"
+        plugins:
+          - kubernetes:
+              podSpec:
+                containers:
+                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+                    resources:
+                      limits:
+                        nvidia.com/gpu: 2
+                    volumeMounts:
+                      - name: devshm
+                        mountPath: /dev/shm
+                      - name: hf-cache
+                        mountPath: /root/.cache/huggingface
+                    env:
+                      - name: HF_HOME
+                        value: /root/.cache/huggingface
+                      - name: HF_TOKEN
+                        valueFrom:
+                          secretKeyRef:
+                            name: hf-token-secret
+                            key: token
+                nodeSelector:
+                  node.kubernetes.io/instance-type: gpu-h100-sxm
+                volumes:
+                  - name: devshm
+                    emptyDir:
+                      medium: Memory
+                  - name: hf-cache
+                    hostPath:
+                      path: /mnt/hf-cache
+                      type: DirectoryOrCreate
+
+      - label: ":full_moon: Diffusion X2I(&A&T) · Function Test with H100 · Multi-GPU Bagel"
         timeout_in_minutes: 120
         commands:
-          - pytest -sv tests/e2e/online_serving/test_bagel_expansion.py -m "full_model and diffusion and H100" --run-level "full_model"
+          - >-
+            pytest -sv
+            tests/e2e/online_serving/test_bagel_expansion.py
+            -m "full_model and diffusion and H100 and distributed_cuda"
+            --run-level "full_model"
         agents:
           queue: "mithril-h100-pool"
         plugins:
@@ -411,44 +603,6 @@ steps:
                       path: /mnt/hf-cache
                       type: DirectoryOrCreate
 
-      # revoke after bagel optimization finished
-      # - label: ":full_moon: Diffusion X2I(&A&T) · BAGEL Multi-Replica with H100"
-      #   timeout_in_minutes: 120
-      #   commands:
-      #     - pytest -s -v tests/e2e/online_serving/test_bagel_multi_replicas.py -m "full_model and diffusion and H100" --run-level "full_model"
-      #   agents:
-      #     queue: "mithril-h100-pool"
-      #   plugins:
-      #     - kubernetes:
-      #         podSpec:
-      #           containers:
-      #             - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
-      #               resources:
-      #                 limits:
-      #                   nvidia.com/gpu: 4
-      #               volumeMounts:
-      #                 - name: devshm
-      #                   mountPath: /dev/shm
-      #                 - name: hf-cache
-      #                   mountPath: /root/.cache/huggingface
-      #               env:
-      #                 - name: HF_HOME
-      #                   value: /root/.cache/huggingface
-      #                 - name: HF_TOKEN
-      #                   valueFrom:
-      #                     secretKeyRef:
-      #                       name: hf-token-secret
-      #                       key: token
-      #           nodeSelector:
-      #             node.kubernetes.io/instance-type: gpu-h100-sxm
-      #           volumes:
-      #             - name: devshm
-      #               emptyDir:
-      #                 medium: Memory
-      #             - name: hf-cache
-      #               hostPath:
-      #                 path: /mnt/hf-cache
-      #                 type: DirectoryOrCreate
 
       - label: ":full_moon: Diffusion X2I(&A&T) · Function Test with L4"
         timeout_in_minutes: 60
@@ -471,7 +625,6 @@ steps:
       - label: ":full_moon: Diffusion X2I(&A&T) · Doc Test"
         timeout_in_minutes: 60
         commands:
-          - export VLLM_TEST_CLEAN_GPU_MEMORY="1"
           - pytest -s -v tests/examples/*/test_text_to_image.py -m "full_model and example and H100" --run-level "full_model"
         agents:
           queue: "mithril-h100-pool"
@@ -507,87 +660,6 @@ steps:
                       path: /mnt/hf-cache
                       type: DirectoryOrCreate
 
-      - label: ":full_moon: Diffusion X2I(&A&T) · GEBench Accuracy Test"
-        timeout_in_minutes: 60
-        commands:
-          - pytest -s -v tests/e2e/accuracy/test_gebench_h100_smoke.py --run-level full_model --gebench-model Qwen/Qwen-Image-2512 --accuracy-judge-model QuantTrio/Qwen3-VL-30B-A3B-Instruct-AWQ --accuracy-gpu 0 --gebench-port 8093 --accuracy-workers 1
-          - buildkite-agent artifact upload "tests/e2e/accuracy/artifacts/gebench_qwen-image-2512/summary*.json"
-        agents:
-          queue: "mithril-h100-pool"
-        plugins:
-          - kubernetes:
-              podSpec:
-                containers:
-                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
-                    resources:
-                      limits:
-                        nvidia.com/gpu: 1
-                    volumeMounts:
-                      - name: devshm
-                        mountPath: /dev/shm
-                      - name: hf-cache
-                        mountPath: /root/.cache/huggingface
-                    env:
-                      - name: HF_HOME
-                        value: /root/.cache/huggingface
-                      - name: HF_TOKEN
-                        valueFrom:
-                          secretKeyRef:
-                            name: hf-token-secret
-                            key: token
-                nodeSelector:
-                  node.kubernetes.io/instance-type: gpu-h100-sxm
-                volumes:
-                  - name: devshm
-                    emptyDir:
-                      medium: Memory
-                  - name: hf-cache
-                    hostPath:
-                      path: /mnt/hf-cache
-                      type: DirectoryOrCreate
-
-      - label: ":full_moon: Diffusion X2I(&A&T) · GEdit-Bench Accuracy Test"
-        timeout_in_minutes: 60
-        commands:
-          - pytest -s -v tests/e2e/accuracy/test_gedit_bench_h100_smoke.py --run-level full_model --gedit-model Qwen/Qwen-Image-Edit --accuracy-judge-model QuantTrio/Qwen3-VL-30B-A3B-Instruct-AWQ --accuracy-gpu 0 --gedit-port 8093 --gedit-samples-per-group 20 --accuracy-workers 1
-          - buildkite-agent artifact upload "tests/e2e/accuracy/artifacts/gedit_scores_qwen-image-edit/qwen-image-edit_all_all_vie_score_*.csv"
-          - buildkite-agent artifact upload "tests/e2e/accuracy/artifacts/gedit_scores_qwen-image-edit/qwen-image-edit_all_all_summary_*.json"
-        agents:
-          queue: "mithril-h100-pool"
-        plugins:
-          - kubernetes:
-              podSpec:
-                containers:
-                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
-                    resources:
-                      limits:
-                        nvidia.com/gpu: 1
-                    volumeMounts:
-                      - name: devshm
-                        mountPath: /dev/shm
-                      - name: hf-cache
-                        mountPath: /root/.cache/huggingface
-                    env:
-                      - name: HF_HOME
-                        value: /root/.cache/huggingface
-                      - name: VLLM_HTTP_TIMEOUT_KEEP_ALIVE
-                        value: "120"
-                      - name: HF_TOKEN
-                        valueFrom:
-                          secretKeyRef:
-                            name: hf-token-secret
-                            key: token
-                nodeSelector:
-                  node.kubernetes.io/instance-type: gpu-h100-sxm
-                volumes:
-                  - name: devshm
-                    emptyDir:
-                      medium: Memory
-                  - name: hf-cache
-                    hostPath:
-                      path: /mnt/hf-cache
-                      type: DirectoryOrCreate
-
       - label: ":full_moon: Diffusion X2I(&A&T) · Accuracy Test"
         timeout_in_minutes: 180
         commands:
@@ -629,28 +701,20 @@ steps:
                       path: /mnt/hf-cache
                       type: DirectoryOrCreate
 
-      - label: ":full_moon: Diffusion X2I(&A&T) · Perf Test"
-        key: nightly-diffusion-x2iat-performance
-        timeout_in_minutes: 360
+      - label: ":full_moon: Diffusion X2I(&A&T) · Perf Test · Qwen-Image"
+        key: nightly-diffusion-x2iat-performance-qwen-image
+        timeout_in_minutes: 180
         commands:
           - export DIFFUSION_BENCHMARK_DIR=tests/dfx/perf/results
           - export DIFFUSION_ATTENTION_BACKEND=FLASH_ATTN
           - export CACHE_DIT_VERSION=1.3.0
-          # [HACK]: run upload in the same command block as pytest.
-          # Because `exit` aborts the entire commands list.
           - |
             set +e
             pytest -s -v tests/dfx/perf/scripts/run_diffusion_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen_image_vllm_omni.json
-            EXIT1=$$?
-            pytest -s -v tests/dfx/perf/scripts/run_diffusion_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen_image_edit_vllm_omni.json
-            EXIT2=$$?
-            pytest -s -v tests/dfx/perf/scripts/run_diffusion_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen_image_edit_2509_vllm_omni.json
-            EXIT3=$$?
-            pytest -s -v tests/dfx/perf/scripts/run_diffusion_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen_image_layered_vllm_omni.json
-            EXIT4=$$?
+            EXIT=$$?
             buildkite-agent artifact upload "tests/dfx/perf/results/diffusion_result_*.json"
             buildkite-agent artifact upload "tests/dfx/perf/results/logs/*.log"
-            exit $$((EXIT1 | EXIT2 | EXIT3 | EXIT4))
+            exit $$EXIT
         agents:
           queue: "mithril-h100-pool"
         plugins:
@@ -685,6 +749,150 @@ steps:
                       path: /mnt/hf-cache
                       type: DirectoryOrCreate
 
+      - label: ":full_moon: Diffusion X2I(&A&T) · Perf Test · Qwen-Image-Edit"
+        key: nightly-diffusion-x2iat-performance-qwen-image-edit
+        timeout_in_minutes: 180
+        commands:
+          - export DIFFUSION_BENCHMARK_DIR=tests/dfx/perf/results
+          - export DIFFUSION_ATTENTION_BACKEND=FLASH_ATTN
+          - export CACHE_DIT_VERSION=1.3.0
+          - |
+            set +e
+            pytest -s -v tests/dfx/perf/scripts/run_diffusion_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen_image_edit_vllm_omni.json
+            EXIT=$$?
+            buildkite-agent artifact upload "tests/dfx/perf/results/diffusion_result_*.json"
+            buildkite-agent artifact upload "tests/dfx/perf/results/logs/*.log"
+            exit $$EXIT
+        agents:
+          queue: "mithril-h100-pool"
+        plugins:
+          - kubernetes:
+              podSpec:
+                containers:
+                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+                    resources:
+                      limits:
+                        nvidia.com/gpu: 4
+                    volumeMounts:
+                      - name: devshm
+                        mountPath: /dev/shm
+                      - name: hf-cache
+                        mountPath: /root/.cache/huggingface
+                    env:
+                      - name: HF_HOME
+                        value: /root/.cache/huggingface
+                      - name: HF_TOKEN
+                        valueFrom:
+                          secretKeyRef:
+                            name: hf-token-secret
+                            key: token
+                nodeSelector:
+                  node.kubernetes.io/instance-type: gpu-h100-sxm
+                volumes:
+                  - name: devshm
+                    emptyDir:
+                      medium: Memory
+                  - name: hf-cache
+                    hostPath:
+                      path: /mnt/hf-cache
+                      type: DirectoryOrCreate
+
+      - label: ":full_moon: Diffusion X2I(&A&T) · Perf Test · Qwen-Image-Edit-2509"
+        key: nightly-diffusion-x2iat-performance-qwen-image-edit-2509
+        timeout_in_minutes: 180
+        commands:
+          - export DIFFUSION_BENCHMARK_DIR=tests/dfx/perf/results
+          - export DIFFUSION_ATTENTION_BACKEND=FLASH_ATTN
+          - export CACHE_DIT_VERSION=1.3.0
+          - |
+            set +e
+            pytest -s -v tests/dfx/perf/scripts/run_diffusion_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen_image_edit_2509_vllm_omni.json
+            EXIT=$$?
+            buildkite-agent artifact upload "tests/dfx/perf/results/diffusion_result_*.json"
+            buildkite-agent artifact upload "tests/dfx/perf/results/logs/*.log"
+            exit $$EXIT
+        agents:
+          queue: "mithril-h100-pool"
+        plugins:
+          - kubernetes:
+              podSpec:
+                containers:
+                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+                    resources:
+                      limits:
+                        nvidia.com/gpu: 4
+                    volumeMounts:
+                      - name: devshm
+                        mountPath: /dev/shm
+                      - name: hf-cache
+                        mountPath: /root/.cache/huggingface
+                    env:
+                      - name: HF_HOME
+                        value: /root/.cache/huggingface
+                      - name: HF_TOKEN
+                        valueFrom:
+                          secretKeyRef:
+                            name: hf-token-secret
+                            key: token
+                nodeSelector:
+                  node.kubernetes.io/instance-type: gpu-h100-sxm
+                volumes:
+                  - name: devshm
+                    emptyDir:
+                      medium: Memory
+                  - name: hf-cache
+                    hostPath:
+                      path: /mnt/hf-cache
+                      type: DirectoryOrCreate
+
+      - label: ":full_moon: Diffusion X2I(&A&T) · Perf Test · Qwen-Image-Layered"
+        key: nightly-diffusion-x2iat-performance-qwen-image-layered
+        timeout_in_minutes: 120
+        commands:
+          - export DIFFUSION_BENCHMARK_DIR=tests/dfx/perf/results
+          - export DIFFUSION_ATTENTION_BACKEND=FLASH_ATTN
+          - export CACHE_DIT_VERSION=1.3.0
+          - |
+            set +e
+            pytest -s -v tests/dfx/perf/scripts/run_diffusion_benchmark.py --test-config-file tests/dfx/perf/tests/test_qwen_image_layered_vllm_omni.json
+            EXIT=$$?
+            buildkite-agent artifact upload "tests/dfx/perf/results/diffusion_result_*.json"
+            buildkite-agent artifact upload "tests/dfx/perf/results/logs/*.log"
+            exit $$EXIT
+        agents:
+          queue: "mithril-h100-pool"
+        plugins:
+          - kubernetes:
+              podSpec:
+                containers:
+                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+                    resources:
+                      limits:
+                        nvidia.com/gpu: 1
+                    volumeMounts:
+                      - name: devshm
+                        mountPath: /dev/shm
+                      - name: hf-cache
+                        mountPath: /root/.cache/huggingface
+                    env:
+                      - name: HF_HOME
+                        value: /root/.cache/huggingface
+                      - name: HF_TOKEN
+                        valueFrom:
+                          secretKeyRef:
+                            name: hf-token-secret
+                            key: token
+                nodeSelector:
+                  node.kubernetes.io/instance-type: gpu-h100-sxm
+                volumes:
+                  - name: devshm
+                    emptyDir:
+                      medium: Memory
+                  - name: hf-cache
+                    hostPath:
+                      path: /mnt/hf-cache
+                      type: DirectoryOrCreate
+
       - label: ":full_moon: Diffusion X2I(&A&T) · HunyuanImage3 · DiT Perf Test"
         key: nightly-hunyuan-image3-performance
         soft_fail: true
@@ -751,7 +959,7 @@ steps:
       - label: ":full_moon: Diffusion X2V · Function Test"
         timeout_in_minutes: 90
         commands:
-          - pytest -s -v tests/e2e/online_serving/test_wan22_expansion.py tests/e2e/online_serving/test_wan_2_1_vace_expansion.py tests/e2e/online_serving/test_hunyuan_video_15_expansion.py  --run-level "full_model"
+          - pytest -s -v tests/e2e/online_serving/test_wan22_expansion.py tests/e2e/online_serving/test_wan_2_1_vace_expansion.py tests/e2e/online_serving/test_hunyuan_video_15_expansion.py tests/e2e/offline_inference/test_wan22_autoround_w4a16_expansion.py -m "full_model and cuda" --run-level "full_model"
         agents:
           queue: "mithril-h100-pool"
         plugins:
@@ -790,7 +998,7 @@ steps:
         timeout_in_minutes: 180
         commands:
           - pytest -s -v tests/e2e/accuracy/wan22_i2v/test_wan22_i2v_video_similarity.py -m full_model --run-level full_model
-          - pytest -s -v tests/e2e/accuracy/test_ltx2_3_video_similarity.py -m advanced_model --run-level advanced_model
+          - pytest -s -v tests/e2e/accuracy/test_ltx2_3_video_similarity.py -m full_model --run-level full_model
           - pytest -s -v tests/e2e/accuracy/test_diffusers_backend_similarity.py -k '2v_matches_diffusers' -m full_model --run-level full_model
         agents:
           queue: "mithril-h100-pool"
@@ -873,6 +1081,64 @@ steps:
                       path: /mnt/hf-cache
                       type: DirectoryOrCreate
 
+  - group: ":card_index_dividers: Diffusion · Quantization Test"
+    depends_on: upload-nightly-pipeline
+    if: build.env("NIGHTLY") == "1" || build.pull_request.labels includes "nightly-test" || build.pull_request.labels includes "diffusion-x2iat-test"
+    steps:
+      - label: ":full_moon: Quantization Test with H100"
+        commands:
+          - timeout 60m pytest -sv tests/diffusion/quantization -m 'full_model and cuda and H100' --run-level "full_model"
+        agents:
+          queue: "mithril-h100-pool"
+        plugins:
+          - kubernetes:
+              podSpec:
+                containers:
+                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+                    resources:
+                      limits:
+                        nvidia.com/gpu: 1
+                    volumeMounts:
+                      - name: devshm
+                        mountPath: /dev/shm
+                      - name: hf-cache
+                        mountPath: /root/.cache/huggingface
+                    env:
+                      - name: HF_HOME
+                        value: /root/.cache/huggingface
+                      - name: HF_TOKEN
+                        valueFrom:
+                          secretKeyRef:
+                            name: hf-token-secret
+                            key: token
+                nodeSelector:
+                  node.kubernetes.io/instance-type: gpu-h100-sxm
+                volumes:
+                  - name: devshm
+                    emptyDir:
+                      medium: Memory
+                  - name: hf-cache
+                    hostPath:
+                      path: /mnt/hf-cache
+                      type: DirectoryOrCreate
+
+      - label: ":full_moon: Quantization Test with L4"
+        timeout_in_minutes: 60
+        commands:
+          - pytest -sv tests/diffusion/quantization -m 'full_model and cuda and L4' --run-level "full_model"
+        agents:
+          queue: "gpu_1_queue" # g6.4xlarge instance on AWS, has 1 L4 GPU
+        plugins:
+          - docker#v5.2.0:
+              image: public.ecr.aws/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+              always-pull: true
+              propagate-environment: true
+              environment:
+                - "HF_HOME=/fsx/hf_cache"
+                - "HF_TOKEN"
+              volumes:
+                - "/fsx/hf_cache:/fsx/hf_cache"
+
   - label: ":bar_chart: Testcase Statistics"
     key: nightly-testcase-statistics
     timeout_in_minutes: 120
@@ -890,7 +1156,7 @@ steps:
               - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
                 resources:
                   limits:
-                    nvidia.com/gpu: 2
+                    nvidia.com/gpu: 1
                 volumeMounts:
                   - name: devshm
                     mountPath: /dev/shm
@@ -919,19 +1185,29 @@ steps:
   - label: ":email: Nightly Collection & Email"
     key: nightly-perf-distribution
     depends_on:
-      - nightly-omni-performance
+      - nightly-omni-performance-no-async-chunk
+      - nightly-omni-performance-async-chunk
+      - nightly-omni-performance-vllm-text
       - nightly-tts-performance
-      - nightly-diffusion-x2iat-performance
+      - nightly-diffusion-x2iat-performance-qwen-image
+      - nightly-diffusion-x2iat-performance-qwen-image-edit
+      - nightly-diffusion-x2iat-performance-qwen-image-edit-2509
+      - nightly-diffusion-x2iat-performance-qwen-image-layered
       - nightly-diffusion-x2v-performance
       - nightly-testcase-statistics
-    if: build.env("NIGHTLY") == "1"
+    if: build.env("NIGHTLY") == "1" && build.env("EMAIL_DISTRIBUTION") == "1"
     commands:
       - pip install openpyxl
       - export DEFAULT_INPUT_DIR=tests/dfx/perf/results
       - export DEFAULT_OUTPUT_DIR=tests/dfx/perf/results
       - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-tts-performance
-      - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-omni-performance
-      - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-diffusion-x2iat-performance
+      - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-omni-performance-no-async-chunk
+      - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-omni-performance-async-chunk
+      - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-omni-performance-vllm-text
+      - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-diffusion-x2iat-performance-qwen-image
+      - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-diffusion-x2iat-performance-qwen-image-edit
+      - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-diffusion-x2iat-performance-qwen-image-edit-2509
+      - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-diffusion-x2iat-performance-qwen-image-layered
       - buildkite-agent artifact download "tests/dfx/perf/results/*.json" . --step nightly-diffusion-x2v-performance
       - buildkite-agent artifact download "tests/dfx/perf/results/*.html" . --step nightly-testcase-statistics
       - python tools/nightly/generate_nightly_perf_excel.py

.buildkite/test-npu-nightly.yaml

@@ -0,0 +1,24 @@
+steps:
+  - group: ":card_index_dividers: Diffusion X2V Model Test"
+    key: nightly-diffusion-x2v-group
+    depends_on: upload-nightly-pipeline
+    if: >-
+      build.env("NIGHTLY") == "1" ||
+      build.pull_request.labels includes "nightly-test" ||
+      build.pull_request.labels includes "diffusion-x2v-test"
+    steps:
+      - label: ":full_moon: Diffusion X2V · Function Test"
+        agents:
+          queue: "ascend-a2b3"
+          resource_class: "npu-4"
+        image: "swr.cn-southwest-2.myhuaweicloud.com/modelfoundry/vllm-omni-ci-npu:${BUILDKITE_COMMIT}"
+        plugins:
+          - kubernetes:
+              podSpecPatch:
+                imagePullSecrets:
+                  - name: swr-secret
+        env:
+          VLLM_WORKER_MULTIPROC_METHOD: spawn
+          HF_TOKEN: "${HF_TOKEN}"
+        commands:
+          - pytest -s -v tests/e2e/online_serving/test_wan22_expansion.py -k npu_i2v --run-level "full_model"

.buildkite/test-npu-ready.yaml

@@ -0,0 +1,21 @@
+steps:
+  - group: ":card_index_dividers: TTS Model Test"
+    key: ready-tts-group
+    depends_on: upload-ready-pipeline
+    steps:
+      - label: ":sound: TTS · Qwen3-TTS CustomVoice Test"
+        agents:
+          queue: "ascend-a2b3"
+          resource_class: "npu-1"
+        image: "swr.cn-southwest-2.myhuaweicloud.com/modelfoundry/vllm-omni-ci-npu:${BUILDKITE_COMMIT}"
+        plugins:
+          - kubernetes:
+              podSpecPatch:
+                imagePullSecrets:
+                  - name: swr-secret
+        env:
+          VLLM_WORKER_MULTIPROC_METHOD: spawn
+          VLLM_ALLOW_LONG_MAX_MODEL_LEN: "1"
+          HF_TOKEN: "${HF_TOKEN}"
+        commands:
+          - pytest -s -v tests/e2e/online_serving/test_qwen3_tts_customvoice.py -m 'core_model' --run-level 'core_model'

.buildkite/test-weekly.yml

@@ -1,5 +1,6 @@
 env:
   VLLM_WORKER_MULTIPROC_METHOD: spawn
+  VLLM_USE_FLASHINFER_MOE_FP16: 0
   HF_HUB_DOWNLOAD_TIMEOUT: 300
   HF_HUB_ETAG_TIMEOUT: 60
 
@@ -83,3 +84,65 @@ steps:
                 hostPath:
                   path: /mnt/hf-cache
                   type: DirectoryOrCreate
+
+  # Invalid HTTP / WS payloads vs live Omni servers (Issue #3649 tracks known skips).
+  - group: "Reliability Test - Invalid parameters Test"
+    depends_on: upload-weekly-pipeline
+    if: build.env("WEEKLY") == "1" || build.pull_request.labels includes "weekly-test"
+    steps:
+      - label: "Invalid parameters Test · H100"
+        timeout_in_minutes: 120
+        commands:
+          - pytest -s -v tests/dfx/reliability/invalid_param_test/ -m "slow and H100"
+        agents:
+          queue: "mithril-h100-pool"
+        plugins:
+          - kubernetes:
+              podSpec:
+                containers:
+                  - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+                    resources:
+                      limits:
+                        nvidia.com/gpu: 2
+                    volumeMounts:
+                      - name: devshm
+                        mountPath: /dev/shm
+                      - name: hf-cache
+                        mountPath: /root/.cache/huggingface
+                    env:
+                      - name: HF_HOME
+                        value: /root/.cache/huggingface
+                      - name: HF_TOKEN
+                        valueFrom:
+                          secretKeyRef:
+                            name: hf-token-secret
+                            key: token
+                nodeSelector:
+                  node.kubernetes.io/instance-type: gpu-h100-sxm
+                volumes:
+                  - name: devshm
+                    emptyDir:
+                      medium: Memory
+                  - name: hf-cache
+                    hostPath:
+                      path: /mnt/hf-cache
+                      type: DirectoryOrCreate
+
+      # Stable Audio Open, Qwen3-TTS speech/batch/voices paths marked ``L4``.
+      - label: "Invalid parameters Test · L4"
+        timeout_in_minutes: 120
+        commands:
+          - pytest -s -v tests/dfx/reliability/invalid_param_test/ -m "slow and L4"
+        agents:
+          queue: "gpu_1_queue"
+        plugins:
+          - docker#v5.2.0:
+              image: public.ecr.aws/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
+              always-pull: true
+              propagate-environment: true
+              shm-size: "8gb"
+              environment:
+                - "HF_HOME=/fsx/hf_cache"
+                - "HF_TOKEN"
+              volumes:
+                - "/fsx/hf_cache:/fsx/hf_cache"

.claude/skills/add-diffusion-model/SKILL.md

@@ -515,15 +515,15 @@ After adding parallelism support, update:
 
 ### Step 11: Add CPU Offload Support
 
-Implement `SupportsModuleOffload` on your pipeline class to enable
+Implement `SupportsComponentDiscovery` on your pipeline class to enable
 `--enable-cpu-offload` and `--enable-layerwise-offload`. The protocol
 declares which submodules the offloader should manage:
 
 ```python
 from typing import ClassVar
-from vllm_omni.diffusion.models.interface import SupportsModuleOffload
+from vllm_omni.diffusion.models.interface import SupportsComponentDiscovery
 
-class YourPipeline(nn.Module, SupportsModuleOffload):
+class YourPipeline(nn.Module, SupportsComponentDiscovery):
     _dit_modules: ClassVar[list[str]] = ["transformer"]
     _encoder_modules: ClassVar[list[str]] = ["text_encoder"]
     _vae_modules: ClassVar[list[str]] = ["vae"]
@@ -540,7 +540,7 @@ class YourPipeline(nn.Module, SupportsModuleOffload):
 All attribute names support dotted paths for nested submodules
 (e.g. `"pipe.transformer"`, `"bagel.time_embedder"`).
 
-Pipelines without `SupportsModuleOffload` fall back to scanning
+Pipelines without `SupportsComponentDiscovery` fall back to scanning
 well-known attribute names (`transformer`, `text_encoder`, `vae`,
 etc.), which fails for non-standard names.
 

.claude/skills/add-diffusion-model/references/parallelism-patterns.md

@@ -92,6 +92,7 @@ class TPSelfAttention(nn.Module):
             softmax_scale=1.0 / (self.head_dim ** 0.5),
             causal=False,
             num_kv_heads=self.to_qkv.num_kv_heads,  # Local KV heads per GPU
+            role="self",
         )
 
     def forward(self, x):

.claude/skills/add-diffusion-model/references/transformer-adaptation.md

@@ -61,6 +61,7 @@ class SelfAttentionBlock(nn.Module):
             softmax_scale=1.0 / (self.head_dim ** 0.5),
             causal=False,
             num_kv_heads=num_heads,
+            role="self",
         )
 
     def forward(self, x, attn_mask=None):
@@ -75,6 +76,24 @@ class SelfAttentionBlock(nn.Module):
         return self.to_out(out)
 ```
 
+**Declaring the attention role.** Always pass a `role` string to `Attention(...)`. It is the lookup key users target with `--diffusion-attention-config.per_role.<role>.backend` to swap kernels per site without touching model code.
+
+| Convention | When to use |
+|---|---|
+| `role="self"` | Q/K/V come from the same hidden state |
+| `role="cross"` | K/V come from a separate `encoder_hidden_states`; pair with `skip_sequence_parallel=True` if K/V is replicated across SP ranks |
+
+For multi-modal sites that don't fit `self` / `cross`, use a dot-namespaced role and provide `role_category` so user config can fall back to the generic category:
+
+```python
+self.audio_to_video_attn = Attention(
+    num_heads=num_heads, head_size=self.head_dim,
+    softmax_scale=1.0 / (self.head_dim ** 0.5), causal=False,
+    role="mymodel.audio_to_video",
+    role_category="cross",
+)
+```
+
 #### Fused QKV with TP (Advanced)
 
 For tensor parallelism, use vLLM's parallel linear layers:
@@ -104,6 +123,7 @@ class TPSelfAttention(nn.Module):
             softmax_scale=1.0 / (self.head_dim ** 0.5),
             causal=False,
             num_kv_heads=num_heads,
+            role="self",
         )
 ```
 

.claude/skills/add-diffusion-model/references/troubleshooting.md

@@ -68,7 +68,7 @@ out = out.reshape(batch, seq_len, -1)
 ### Different Output vs Diffusers Reference
 
 **Common causes**:
-1. **Attention backend difference**: FlashAttention vs SDPA may produce slightly different results. Set `DIFFUSION_ATTENTION_BACKEND=TORCH_SDPA` to match diffusers
+1. **Attention backend difference**: FlashAttention vs SDPA may produce slightly different results. Force SDPA via `--diffusion-attention-backend TORCH_SDPA` (or `DIFFUSION_ATTENTION_BACKEND=TORCH_SDPA`) to match diffusers; for finer-grained per-role overrides see `--diffusion-attention-config.per_role.<role>.backend`
 2. **Float precision**: vLLM-Omni may use bfloat16 where diffusers uses float32 for some operations
 3. **Missing normalization**: Check all LayerNorm/RMSNorm are preserved
 4. **Scheduler rounding**: Some schedulers have numerical sensitivity

.claude/skills/diffusion-perf-opt/SKILL.md

@@ -0,0 +1,488 @@
+---
+name: diffusion-perf-opt
+description: Diagnose and optimize vLLM Omni diffusion workloads, especially Wan/Qwen/Flux-style image and video generation. Use when Codex is asked to analyze profiling traces, choose parallel strategies, inspect torch profiler trace.json or trace.json.gz timelines, estimate optimization ROI, investigate GPU idle/free bubbles, compare USP/CFG/HSDP/VAE parallelism, or design operator/host/quantization optimizations for vLLM Omni.
+---
+
+# vLLM Omni Performance Optimization
+
+Use this skill to run a disciplined optimization loop for vLLM Omni diffusion workloads. Keep two ideas separate: real performance baselines are collected with low overhead, while torch profiler traces are diagnostic artifacts and may distort latency.
+
+## First Questions
+
+Before proposing changes, ask for the optimization scene if it is not already known:
+
+- GPU model, card count, topology, and whether NVLink is present.
+- Model and pipeline, for example Wan2.2 I2V A14B.
+- User workload: resolution, frames, steps, batch/concurrency, CFG scales, prompt/image inputs.
+- Three runnable commands for each model/workload, or scripts that generate them:
+  - **Server startup command**: exact `vllm serve` command, environment variables, model path, port, parallelism flags, profiler flags, and precision/compile settings.
+  - **User request command**: exact single-request client command (for example curl or Python client) with fixed prompt/media/seed/size/steps. Use this to validate correctness and collect per-request stage timings.
+  - **User benchmark command**: exact repeatable benchmark command or script with warmup count, measured iteration count, concurrency/batch policy, output directory, and summary format.
+- Current enabled strategies: USP/SP, CFG parallel, HSDP/FSDP, VAE patch parallel, torch.compile, profiler options.
+- Optimization target: latency, throughput, memory, cost, or quality-preserving speed.
+- Precision/quality tolerance: bf16/fp8/quantization/sparsity/approximate attention allowed or not.
+
+## Workflow
+
+1. **Freeze the measurement protocol and commands.**
+   - Before analyzing parallel strategies or traces, establish the three commands for the target model/workload: server startup, single user request, and user benchmark.
+   - Prefer checked-in scripts or one-off shell scripts over free-form commands in chat. The scripts should make workload variables explicit, including model path, port/base URL, prompt/media inputs, resolution, frames, steps, seed, warmup, measured iterations, concurrency, and output path.
+   - Measurement reports must preserve the concrete process, not just the final numbers. For each tested configuration, write down the server startup command, the user request command, the user benchmark command or polling loop, the final server response metrics, and the client-side timing/HTTP result.
+   - Present all duration and latency values in **milliseconds (ms)** in tables and summaries. If an API returns seconds, convert to ms before reporting. Keep raw units only inside quoted raw logs or source snippets.
+   - Keep profiler modes separate in the command set:
+     - Baseline/benchmark commands should avoid torch profiler and stack collection.
+     - Diagnostic commands may enable torch profiler after a baseline identifies a bottleneck.
+   - If any of the three commands is missing, ask for it or create a proposed script before proceeding.
+   - Make clear which command is authoritative for correctness validation and which command is authoritative for performance numbers.
+
+2. **Collect a real baseline.**
+   - Disable PyTorch profiler and stack collection.
+   - Disable or fix torch.compile state so A/B is fair.
+   - Avoid `--enforce-eager` for production-speed baselines unless eager is the target.
+   - Prefer `--log-stats` and `--enable-diffusion-pipeline-profiler` for low-overhead stage timing. PR 3069 has the relevant metrics/log-stats changes; if local code does not include them, fetch or cherry-pick the minimal metrics changes rather than merging unrelated PR drift.
+   - Run warmup requests and exclude first-request lazy init.
+
+3. **Model the parallel strategy before testing.**
+   - Estimate compute and communication for self-attention, cross-attention, FFN, CFG, VAE encode/decode, and HSDP.
+   - Select a small candidate matrix rather than exhaustively testing everything.
+   - Typical 2-card candidates: `USP=2`, `CFG=2`, `USP=1/HSDP on-off`, VAE parallel on-off if memory allows.
+   - Typical 4-card candidates: `USP=4`, `CFG=2 x USP=2`, `USP=2 x HSDP`, VAE parallel on-off.
+   - Typical 8-card candidates for official CFG-enabled video diffusion models:
+     - Primary candidate: `CFG=2 x USP=4` with VAE patch parallel across all 8 ranks.
+     - Compare against: `CFG=1 x USP=8` to test whether larger sequence parallel groups beat CFG branch parallelism.
+     - Isolate VAE parallelism: keep the DiT strategy fixed and compare VAE patch parallel on/off or different VAE patch sizes.
+     - If long-video `diffuse` remains dominant and Ulysses all-to-all is suspected, test a hybrid sequence strategy such as `CFG=2 x USP=2 x Ring=2`.
+     - Test HSDP off only if the model fits without it; treat HSDP primarily as a memory strategy until A/B proves otherwise.
+   - Prefer USP/SP for long video token sequences; prefer CFG parallel when CFG doubles transformer forwards and sequence length is modest.
+   - Convert workload shape to latent/patch token counts before choosing candidates. For video models, record frames, latent frames, latent HxW, patch size, approximate token count, and which stages should scale with the token count.
+
+4. **Search for the best parallel configuration.**
+   - Start with a small matrix that answers one question per comparison:
+     - `CFG parallel vs larger USP`: compare `CFG=2 x USP=world/2` against `CFG=1 x USP=world` for CFG-enabled workloads.
+     - `VAE patch parallel value`: compare the best DiT strategy with VAE patch parallel enabled and disabled.
+     - `HSDP cost`: compare HSDP on/off only when both configurations fit memory.
+     - `Ulysses vs Ring`: test a Ring/Ulysses hybrid only after long-sequence `diffuse` is confirmed dominant.
+   - For each configuration, create or record a stable config id, for example `A_cfg2_usp4_vaepp8_hsdp_tiling`.
+   - For each config id, capture:
+     - exact server command and environment variables,
+     - observed distributed setup from logs, such as SP groups, CFG groups, HSDP shard/replicate sizes, VAE patch size,
+     - exact request command for every scenario,
+     - final server response metrics and client-side elapsed time,
+     - output artifact paths and any failed/empty responses.
+   - Use one warmup request per scenario, then at least three measured repeats for the shortlisted config. For exploratory matrix pruning, one measured request is acceptable only if the margin is large; label it as one-shot.
+   - Compare configurations by stage, not only end-to-end latency. A configuration can improve `diffuse` while hurting `vae.decode`; record both effects.
+   - Select the best config only after checking the target metric, dominant stages, memory headroom, and output correctness.
+
+5. **Run targeted A/B tests.**
+   - Change one variable per test.
+   - Keep model, input, seed, request parameters, GPU placement, and warmup policy fixed.
+   - Record latency, stage timings, memory, output quality, and logs.
+   - Report comparison tables in ms. Include at least end-to-end client time, server `inference_time`, server stage generation time if available, `vae.encode`, `diffuse`, `vae.decode`, and peak memory.
+
+6. **Collect diagnostic trace only after narrowing hypotheses.**
+   - Use torch profiler for a small number of requests.
+   - Run two separate diagnostic traces instead of mixing concerns:
+     - **Operator/shape trace**: enable `torch_profiler_record_shapes=True` and keep stack collection disabled. Use this to rank CUDA kernels, NCCL collectives, attention/MLP/norm/RoPE work, and shape-specific hot operators.
+     - **Host-stack trace**: enable `torch_profiler_with_stack=True` and normally keep shape collection disabled. Use this to map CPU/Python host gaps, synchronization points, scheduler paths, and request handling overhead.
+   - Keep both trace commands and reports separate from baseline/benchmark commands. Torch profiler latency is diagnostic only and must not be used as the final latency claim.
+   - Prefer profiling only the narrowed dominant scenario, for example the highest-resolution/video-length case where `diffuse` dominates.
+   - If profiler endpoints are available, run one warmup request first, then call `/start_profile`, run one profiled request, and call `/stop_profile`. This keeps model initialization and warmup out of the diagnostic trace.
+   - Start by analyzing rank 0 only. Expand to more ranks only if rank 0 suggests imbalance, unclear GPU idle/free bubbles, high NCCL wait, server timing mismatch, CFG branch imbalance, or USP group stragglers.
+   - Diagnostic reports must be written to disk and preserve: server command, profiler config, warmup/request/polling commands, trace artifact paths, rank analyzed, analyzer output or summary, and the decision about whether additional ranks are necessary.
+   - Analyze both rank-level balance and device-level free bubbles when additional ranks are opened.
+
+7. **Analyze host, communication, and operators.**
+   - Find GPU idle/free intervals and map each large gap to the enclosing CPU/Python code.
+   - Separate real GPU idle from profiler overhead such as CUPTI `Command Buffer Full`.
+   - Compare NCCL kernel time to user annotations; annotations can overcount nested intervals.
+   - Rank operator work by total CUDA time and by repeated small-kernel launch count.
+
+8. **Produce an optimization plan.**
+   - Classify candidates as P0/P1/P2.
+   - For each candidate, state necessity, expected benefit, implementation path, validation plan, and quality risk.
+   - Do not implement high-risk operator rewrites before proving the operator is a bottleneck for the target shapes.
+   - End the plan with a user-facing candidate selection table. The assistant
+     should not automatically choose a risky optimization just because it is
+     technically possible. Present the options clearly and let the user decide
+     which item is worth implementing based on latency target, engineering
+     budget, memory headroom, and quality tolerance.
+   - Organize the plan by optimization layer, not by a flat list of ideas:
+     - host/runtime optimization,
+     - measurement/benchmark reliability,
+     - parallelism and communication,
+     - VAE encode/decode and media pre/post processing,
+     - operator fusion and layout cleanup,
+     - attention main-path optimization,
+     - algorithmic, precision, or approximation changes.
+   - For each layer, tie every candidate back to evidence from baseline
+     metrics, diagnostic trace, source code, or output quality requirements.
+     Do not list generic optimizations without a trace or workload reason.
+
+## Priority Rules
+
+- **P0:** low risk, likely useful, or required for trustworthy measurement. Examples: real baseline, warmup, targeted parallel A/B, disabling avoidable `empty_cache`, scheduler coefficient caching.
+- **P1:** meaningful code changes with contained risk. Examples: cross-attention KV caching, VAE gather/broadcast reduction, AdaLayerNorm/RMSNorm/RoPE fusion after trace evidence.
+- **P2:** high implementation or quality risk. Examples: FA to LA replacement, custom Triton/CUDA fused kernels, FP8/quantization, sparsity/Rainfusion-style acceleration.
+
+Every implemented optimization needs A/B validation and quality regression. A/B means same workload and hardware before/after. Quality regression means checking generated image/video stability, artifacts, temporal flicker, and seed behavior when precision or approximate kernels change.
+
+## Optimization Layers
+
+After baseline, parallel-search, and diagnostic traces, summarize optimization
+opportunities by layer. This is the core of the performance analysis: the goal
+is to connect evidence to a scoped implementation and a validation plan.
+
+### Host and Runtime Optimization
+
+Purpose: remove CPU/Python stalls, synchronization points, allocator overhead,
+and request-path overhead that leave GPU lanes empty.
+
+Evidence to look for:
+
+- High `idle_pct` or large `GAP` blocks in `trace_analyzer.py`.
+- Host-stack trace lines such as `torch.cuda.empty_cache`,
+  `cudaStreamSynchronize`, `cudaDeviceSynchronize`, Python locks, scheduler
+  waits, image/video preprocessing, or repeated small allocation paths.
+- Difference between client wall-clock time and server `inference_time_s`.
+
+Typical candidates:
+
+- Make avoidable `torch.cuda.empty_cache()` optional or guard it by memory
+  headroom.
+- Cache scheduler coefficients, timesteps, masks, or other tiny repeated CPU
+  computations when the request shape/steps are fixed.
+- Remove avoidable host-device synchronizations and blocking logging/stat calls.
+- Move expensive preprocessing out of the critical path or cache fixed prompt,
+  image, and transform work for benchmark scenarios.
+- Ensure benchmark scripts record client-side elapsed time, HTTP status, output
+  path, and server response metrics.
+
+Priority guidance:
+
+- Usually P0 when the change is measurement reliability or an obvious removable
+  synchronization.
+- Usually P1 when it changes scheduling, memory lifetime, or request execution
+  order.
+
+Validation:
+
+- Re-run non-profiler baseline with same workload and seed.
+- Confirm peak memory headroom if disabling cache cleanup.
+- Confirm generated output exists and quality/seed behavior is unchanged.
+
+### Parallelism and Communication Optimization
+
+Purpose: choose the right decomposition for CFG branches, sequence tokens, model
+weights, VAE tiles, and rank topology.
+
+Evidence to look for:
+
+- Baseline A/B across `CFG`, `USP/SP`, `Ring`, `HSDP/FSDP`, and VAE patch
+  parallelism.
+- Stage timing shifts: `diffuse`, `vae.encode`, `vae.decode`, and server
+  end-to-end.
+- NCCL kernel time from trace, not only `user_annotation` time.
+- Rank imbalance across SP group ranks or CFG branch ranks.
+- Memory headroom and OOM risk.
+
+Typical candidates:
+
+- `CFG=2 x USP=world/2` versus `CFG=1 x USP=world` for CFG-enabled models.
+- VAE patch parallel on/off or patch size tuning.
+- HSDP/FSDP on/off only if both configurations fit memory.
+- Ulysses versus Ulysses+Ring only after long-sequence `diffuse` is confirmed
+  dominant and all-to-all is suspected.
+- Rank mapping/topology changes if all-rank traces show stragglers or NCCL wait.
+- Buffer reuse or preallocation for FSDP/HSDP all-gather paths.
+
+Priority guidance:
+
+- P0/P1 for configuration-only changes with strong measured wins.
+- P1 for buffer reuse or rank mapping changes.
+- P2 for invasive distributed algorithm changes.
+
+Validation:
+
+- Measure by stage and memory, not only end-to-end.
+- Use one-variable A/B with identical prompt/media/seed/shape/steps.
+- When communication is suspected, compare rank0-3 in one USP group and rank0
+  versus rank4 across CFG branches for `CFG=2 x USP=4`.
+
+### VAE and Media Pipeline Optimization
+
+Purpose: reduce encode/decode, tiling, split/gather, and media conversion time.
+
+Evidence to look for:
+
+- Large `vae.encode` or `vae.decode` in low-overhead stage timings.
+- Host-stack gaps in VAE tile split, gather, merge, broadcast, or image/video
+  transforms.
+- VAE kernels or cuDNN convolution in operator trace.
+- Whether every rank needs the final decoded tensor.
+
+Typical candidates:
+
+- Keep VAE patch parallel enabled when it has clear measured benefit.
+- Reduce VAE gather/broadcast to only ranks that need the final media output.
+- Reuse tile metadata, split buffers, or gather buffers.
+- Evaluate bf16/autocast behavior for VAE only with visual quality checks.
+- Avoid redundant image conversion, resize, or tensor construction in repeated
+  benchmark runs.
+
+Priority guidance:
+
+- P0/P1 if VAE is a large share of the target workload or if a host gap is
+  obvious and low risk.
+- Lower priority when `diffuse` dominates and VAE is already patch-parallelized.
+
+Validation:
+
+- Compare `vae.encode`, `vae.decode`, server end-to-end, and peak memory.
+- Check output video integrity, artifacts, flicker, and seed stability.
+
+### Operator Fusion and Layout Cleanup
+
+Purpose: reduce high-frequency small kernels, memory bandwidth pressure, layout
+conversions, and launch overhead in transformer and VAE blocks.
+
+Evidence to look for:
+
+- Top operator tables showing many `aten::copy_`, `aten::cat`,
+  `split_with_sizes_copy`, `aten::add`, `aten::mul`, `aten::div`, norm,
+  activation, RoPE, or reshape/layout kernels.
+- `ops_rankN.xlsx` `by_shape` sheet showing repeated small shapes inside the
+  same block path.
+- Trace lanes showing many short kernels between larger GEMM/attention kernels.
+- Source code patterns with repeated elementwise chains or layout conversions.
+
+Typical fusion targets:
+
+- AdaLayerNorm / RMSNorm / LayerNorm plus scale/shift fusion.
+- RoPE fusion with Q/K layout preparation when shapes are stable.
+- Residual add, scale, gate, and elementwise chains.
+- MLP gate/up/down cleanup, such as fusing activation and multiply around
+  GEMM outputs when feasible.
+- QKV projection and reshape/split/cat path cleanup.
+- Attention pre/post layout cleanup to avoid unnecessary copies, cats, and
+  splits around sequence parallel all-to-all.
+
+Priority guidance:
+
+- P1 when implemented with existing PyTorch/Triton/local helper patterns and
+  validated against exact outputs or tolerances.
+- P2 when it requires custom CUDA/Triton kernels, changes numerics, or touches
+  attention math directly.
+
+Validation:
+
+- First prove the operator family is material for the target shape.
+- Use non-profiler A/B for latency and stage timing.
+- Use quality regression checks for generated video stability.
+- Check compile behavior and graph breaks if using `torch.compile`.
+
+### Attention Main-Path Optimization
+
+Purpose: address the dominant self-attention cost when FlashAttention or other
+attention kernels dominate CUDA time.
+
+Evidence to look for:
+
+- Operator trace where FlashAttention/SDPA kernels dominate total CUDA time.
+- Attention shape from `ops_rankN.xlsx` `by_shape`, model code, or trace
+  metadata.
+- Whether attention cost scales with latent frames, latent H/W, patch size, or
+  CFG duplication.
+- Layout/copy/all-to-all work around attention.
+
+Typical candidates:
+
+- Verify the attention backend and shape are on the intended fast kernel path.
+- Compare supported attention backends only with identical workload and quality
+  settings.
+- Reduce attention input size by safe model/config choices when allowed:
+  latent resolution, frame count, patching, boundary ratio, or windowing.
+- Remove avoidable layout conversions before/after attention.
+- Reuse condition-side KV or other static inputs if the model structure allows.
+- Consider custom kernels, sparse/window/linear attention, or approximation only
+  after quality risk is accepted.
+
+Priority guidance:
+
+- P1 for backend/config/layout changes with preserved math.
+- P2 for approximate attention, sparsity, custom kernels, or any change that can
+  alter quality/temporal consistency.
+
+Validation:
+
+- Always include output quality and seed behavior checks.
+- Compare `diffuse`, server end-to-end, peak memory, and attention kernel time
+  in diagnostic traces if needed.
+
+### Algorithmic, Precision, and Approximation Optimization
+
+Purpose: reduce mathematical work or precision cost beyond local code cleanup.
+
+Evidence to look for:
+
+- A single operator family dominates even after low-risk runtime, parallel, and
+  fusion work.
+- Memory bandwidth or compute utilization suggests precision or quantization
+  could matter.
+- The user explicitly allows quality-preserving or approximate methods.
+
+Typical candidates:
+
+- FP8/quantization for transformer or selected projections.
+- Sparsity or Rainfusion-style acceleration.
+- Reduced steps, scheduler changes, distillation, or caching across frames.
+- Approximate attention or linear attention.
+
+Priority guidance:
+
+- Usually P2 because quality, numerics, and implementation risk are high.
+
+Validation:
+
+- Requires strict A/B, visual quality review, temporal flicker checks, seed
+  stability, and possibly human evaluation.
+
+### Interpolation, Super-Resolution, and E2E Pipeline Optimization
+
+Purpose: optimize the whole user-visible video product, not only the base
+diffusion invocation. Some deployments trade base-model latency against
+post-processing, interpolation, or super-resolution stages.
+
+Evidence to look for:
+
+- E2E latency breakdown across base generation, interpolation, super-resolution,
+  encoding, storage, and response streaming.
+- Fast/slow GPU or fast/slow stage analysis across multiple cards and pipeline
+  stages.
+- User quality target: resolution, FPS, temporal smoothness, and acceptable
+  post-processing artifacts.
+
+Typical candidates:
+
+- Add or optimize a frame interpolation stage when it reduces required base
+  model frames for the same perceived FPS.
+- Add or optimize a super-resolution model when generating lower base
+  resolution plus SR is faster for the target quality.
+- Analyze E2E2 pipeline behavior: client request, service scheduling, diffusion,
+  VAE/media, post-process, file write, and response.
+- Identify fast/slow cards or stages and rebalance pipeline placement.
+
+Priority guidance:
+
+- P1 when using proven interpolation/SR components without changing diffusion
+  math.
+- P2 when quality risk is high or the pipeline adds significant operational
+  complexity.
+
+Validation:
+
+- Measure E2E wall-clock, per-stage server timings, output FPS/resolution,
+  artifacts, flicker, and user-visible quality.
+
+### Optimization Candidate Library
+
+Use this table as a compact menu, not as automatic recommendations. Pick items
+only when baseline metrics, trace evidence, source inspection, or quality
+tolerance supports them.
+
+| Layer | Candidate | Evidence | Priority | Validation focus |
+|---|---|---|---|---|
+| Measurement | Freeze server/request/benchmark commands | Missing or drifting commands | P0 | Repeatable non-profiler A/B |
+| Measurement | Separate baseline and diagnostic profiler runs | Profiler used for latency claims | P0 | Low-overhead stage timings |
+| Host/runtime | Guard or remove avoidable `empty_cache` | Host-stack gaps or sync stalls | P0/P1 | Latency, peak memory, OOM safety |
+| Host/runtime | Cache scheduler coefficients/timesteps | Repeated tiny CPU/GPU work | P0/P1 | Same seed/output, stage timing |
+| Host/runtime | Reduce framework scheduling overhead | Client time exceeds server time | P1 | E2E latency, throughput |
+| Parallel | `CFG=2 x USP=world/2` vs `USP=world` | CFG doubles forward work | P0/P1 | `diffuse`, NCCL, memory |
+| Parallel | Tune VAE patch parallelism | VAE encode/decode is material | P0/P1 | VAE time, output correctness |
+| Parallel | HSDP on/off or buffer reuse | HSDP affects memory/all-gather | P1 | Memory, latency, OOM risk |
+| Parallel | Ulysses vs Ulysses+Ring | Long sequence all-to-all suspected | P1/P2 | Rank balance, NCCL kernels |
+| Cross-attn | Disable SP for short condition tokens | Cross-attn comm exceeds compute | P1 | `diffuse`, correctness |
+| VAE/media | Reduce VAE gather/broadcast | Rank traces show VAE wait | P1 | Rank balance, output file |
+| VAE/media | Reuse tile metadata/buffers | Tile split/merge host gaps | P1 | `vae.encode/decode`, memory |
+| VAE/media | VAE bf16/autocast | VAE float kernels are slow | P1/P2 | Artifacts, flicker, seed stability |
+| Operator fusion | AdaLayerNorm/LayerNorm fusion | Norm plus scale/shift kernels | P1 | Numeric tolerance, latency |
+| Operator fusion | RMSNorm fusion | Many small RMSNorm kernels | P1 | Numeric tolerance, latency |
+| Operator fusion | RoPE cache/fuse/layout cleanup | RoPE copy/reshape kernels | P1/P2 | Kernel count, correctness |
+| Operator layout | QKV or attention layout cleanup | Copy/cat/split around attention | P1 | Copy kernels, compile behavior |
+| Attention | Verify backend fast path | FA/SDPA dominates trace | P1 | `diffuse`, attention kernels |
+| Attention | FA to LA or selected-head LA | Attention remains dominant | P2 | Quality, temporal stability |
+| Precision | Transformer FP8/quantization | Compute/bandwidth bound and allowed | P2 | Quality, speed, stability |
+| Sparsity | Rainfusion-style acceleration | DiT compute remains dominant | P2 | Prompt diversity, quality |
+| Pipeline | Frame interpolation | Fewer base frames can meet FPS | P1/P2 | E2E latency, motion artifacts |
+| Pipeline | Super-resolution | Lower base res plus SR may win | P1/P2 | Detail quality, artifacts |
+| E2E | Fast/slow-card analysis | Multi-card stragglers | P0/P1 | Per-rank/stage wall-clock |
+
+### Optimization Plan Template
+
+Use this table shape when reporting the next work items:
+
+| Priority | Layer | Candidate | Evidence | Expected benefit | Implementation path | Validation | Quality risk |
+|---|---|---|---|---|---|---|---|
+| P0 | Host/runtime | Guard `empty_cache` | Host-stack gap points to `torch.cuda.empty_cache` | Small latency reduction, less idle | Add config/env guard | Non-profiler A/B, memory check | Low |
+| P1 | Operator fusion | RMSNorm/AdaLayerNorm fusion | High-frequency norm/elementwise kernels | Lower launch/bandwidth overhead | Use existing fusion helper or targeted Triton | A/B + output check | Medium |
+| P1/P2 | Attention | Attention layout/backend investigation | FA kernel dominates CUDA time | Potentially large | Inspect shapes/backend and remove layout copies | A/B + trace + quality | Medium/high |
+
+Then present a short selection prompt using the same rows:
+
+```text
+Which candidate should we implement next?
+
+1. P0 Host/runtime: guard empty_cache
+   - Expected benefit: small but low-risk latency reduction.
+   - Risk: possible memory increase/OOM if memory headroom is insufficient.
+
+2. P1 Operator fusion: inspect by_shape and implement first norm/RoPE/layout fusion
+   - Expected benefit: medium if high-frequency small kernels are confirmed.
+   - Risk: numerical/compile/quality validation needed.
+
+3. P1/P2 Attention: FA/LA/backend/layout investigation
+   - Expected benefit: potentially large.
+   - Risk: high quality and implementation risk.
+```
+
+If the user has not chosen an item, default to explaining tradeoffs and asking
+which candidate to execute. Only proceed autonomously on low-risk P0 measurement
+or instrumentation fixes.
+
+## Analysis Helpers
+
+PyTorch profiler traces are Chrome/Perfetto-compatible JSON files, usually
+`trace_rankN.json` or `trace_rankN.json.gz`. They normally contain a top-level
+`traceEvents` list, though some exporters emit the raw event list directly.
+
+Use the checked-in analyzer from the repository root:
+
+```bash
+python3 .claude/skills/diffusion-perf-opt/scripts/trace_analyzer.py \
+  vllm_profile/.../trace_rank0.json.gz \
+  --min-gap-ms 5 \
+  --topn 20
+```
+
+For rank imbalance or communication questions, pass all relevant rank traces in
+one command. For host gaps, lower `--min-gap-ms` to `1` and use a host-stack
+trace. Read `gpu_span_s`, `busy_union_s`, `idle_union_s`, `idle_pct`, `GAP`
+blocks, `Top GPU/operator events by total duration`, and `Top NCCL-like events
+by category`. Treat `cat=user_annotation` NCCL ranges as enclosing annotations;
+prefer `cat=kernel` or `cat=gpu_user_annotation` for real device work.
+
+The analyzer summarizes timing only. It does not parse tensor shapes, attribute
+overlap to individual streams, prove quality, or provide final latency claims.
+Use `ops_rankN.xlsx` or PyTorch key averages for shape analysis, and re-test any
+optimization with non-profiler baseline commands.
+
+Read `references/optimization-playbook.md` when drafting the optimization table or comparing candidate techniques.
+
+## vLLM Omni Heuristics
+
+- Cross-attention usually should not use USP/SP when text/image condition token count is much smaller than latent video tokens. Confirm via trace; in Wan2.2 I2V, self-attention dominates cross-attention.
+- VAE bf16/autocast is often worthwhile but requires visual quality checks.
+- VAE patch parallel can help decode/encode but may add gather/merge/broadcast overhead. Check whether all ranks need the final decoded tensor.
+- HSDP/FSDP is primarily a memory strategy. If the model fits without it, run an on/off latency comparison.
+- Scheduler work can create small host/device gaps; cache tiny solve coefficients when timesteps/order are known.
+- `torch.cuda.empty_cache()` can prevent OOM but creates synchronization/idle. Make it optional if memory headroom is sufficient.
+- `Command Buffer Full` in profiler output is profiler overhead, not a model optimization target.

.claude/skills/diffusion-perf-opt/agents/openai.yaml

@@ -0,0 +1,4 @@
+interface:
+  display_name: "vLLM Omni Perf Opt"
+  short_description: "Profile and optimize vLLM Omni diffusion performance."
+  default_prompt: "Analyze and optimize a vLLM Omni diffusion workload using baselines, traces, parallel strategy modeling, and prioritized optimization plans."

.claude/skills/diffusion-perf-opt/references/optimization-playbook.md

@@ -0,0 +1,82 @@
+# Optimization Playbook
+
+Use this reference when turning trace evidence into prioritized vLLM Omni optimizations.
+
+## Parallel Strategy
+
+Start from workload shape:
+
+- Long video tokens, high resolution, many frames: self-attention and FFN dominate. USP/SP is usually valuable.
+- CFG enabled with positive and negative prompts: transformer forward count doubles. CFG parallel may beat USP on small/moderate sequence lengths.
+- Cross-attention: skip SP/USP when condition tokens are much smaller than latent tokens; extra all-to-all can exceed compute saved.
+- HSDP/FSDP: use to fit memory first. If memory allows, compare without HSDP because all-gathers and lazy init add overhead.
+- VAE parallel: useful when encode/decode is material. Check gather/merge/broadcast and whether every rank needs final decoded output.
+
+Candidate matrices:
+
+- 2 cards: `USP=2`, `CFG=2`, HSDP on/off, VAE PP on/off.
+- 4 cards: `USP=4`, `CFG=2 x USP=2`, `USP=2 x HSDP`, VAE PP on/off.
+- 8 cards: add pipeline/stage parallel only after measuring orchestration and inter-stage transfer overhead.
+
+## Host And Free Bubble Analysis
+
+Look for device intervals where no kernel, memcpy, or memset is active.
+
+Common causes:
+
+- First request FSDP/HSDP lazy init.
+- Python preprocessing: image load, resize, `to_tensor`, tokenizer, request marshaling.
+- `torch.cuda.empty_cache()` or explicit synchronizations.
+- Scheduler small linear algebra such as tiny `torch.linalg.solve`.
+- VAE tile split/merge Python loops.
+- Profiler overhead such as CUPTI command buffer flush/full.
+
+Also inspect trace-external time:
+
+- API request parsing and multipart upload.
+- Engine/orchestrator dispatch.
+- Worker RPC and queue wait.
+- Output serialization, video write, base64, HTTP response.
+
+## Operator Optimization Candidates
+
+Evaluate necessity before implementation:
+
+- **FA to LA / LA for head:** high potential only if attention is the main CUDA hotspot and target shapes fit LA well.
+- **Cross-attention BSND/no transpose:** do only if transpose/copy around cross-attn is measurable.
+- **AdaLayerNorm fusion:** fuse norm, scale/shift, gate, residual, and dtype conversion if repeated elementwise kernels are significant.
+- **RMSNorm fusion:** useful for Q/K norms and VAE norms when small-kernel launch count is high.
+- **FP32 LayerNorm to bf16:** quality-sensitive; run visual regression.
+- **LA preprocess:** integrate only if preprocess overhead is cached or amortized.
+- **RoPE move/cache/fuse:** useful when RoPE small kernels are visible around every self-attn block.
+- **VAE RMSNorm replacement:** only after VAE internal trace shows norm as a real component of decode/encode.
+- **Scheduler fusion/cache:** cache coefficient solves and fuse CFG combine with scheduler arithmetic when possible.
+
+Before writing a custom kernel, check:
+
+- Local vLLM Omni implementations.
+- Upstream vLLM kernels and attention backends.
+- SGLang, FlashInfer, FlashAttention, and Triton examples.
+- Shape constraints and layout expectations.
+
+## Quantization And Sparsity
+
+Treat these as high-risk optimizations:
+
+- Rainfusion/sparse diffusion can be high reward but needs model-specific quality validation.
+- VAE decode quantization can reduce decode time but usually has smaller end-to-end upside than transformer attention/FFN work.
+- FP8 or approximate kernels require seed-stable visual regression, temporal flicker checks, and prompt diversity.
+
+## Output Format For Recommendations
+
+Return a table with:
+
+- Priority: P0/P1/P2.
+- Optimization.
+- Evidence from trace or code.
+- Expected benefit.
+- Risk/quality impact.
+- Implementation path.
+- Validation command or A/B test.
+
+State clearly when a recommendation is a hypothesis requiring new trace with shapes.

.claude/skills/diffusion-perf-opt/scripts/trace_analyzer.py

@@ -0,0 +1,144 @@
+#!/usr/bin/env python3
+"""Summarize torch profiler Chrome traces for vLLM Omni diffusion optimization."""
+
+from __future__ import annotations
+
+import argparse
+import collections
+import gzip
+import json
+from pathlib import Path
+from typing import Any
+
+GPU_CATS = {"kernel", "gpu_memcpy", "gpu_memset"}
+CPU_CATS = {"python_function", "user_annotation", "cpu_op", "cuda_runtime", "cuda_driver"}
+
+
+def open_trace(path: Path):
+    if path.suffix == ".gz":
+        return gzip.open(path, "rt")
+    return path.open("rt")
+
+
+def event_name(event: dict[str, Any]) -> str:
+    return str(event.get("name", ""))
+
+
+def summarize_trace(path: Path, min_gap_us: float, topn: int) -> None:
+    with open_trace(path) as f:
+        data = json.load(f)
+
+    events = data if isinstance(data, list) else data.get("traceEvents", [])
+    gpu: list[tuple[float, float, float, str, str, Any, Any]] = []
+    cpu: list[tuple[float, float, float, str, str, Any, Any]] = []
+    by_gpu_name: dict[str, list[float]] = collections.defaultdict(lambda: [0, 0.0, 0.0])
+    by_name: dict[str, list[float]] = collections.defaultdict(lambda: [0, 0.0, 0.0])
+    nccl: dict[tuple[str, str], list[float]] = collections.defaultdict(lambda: [0, 0.0, 0.0])
+
+    for event in events:
+        dur = event.get("dur")
+        ts = event.get("ts")
+        if dur is None or ts is None or dur <= 0:
+            continue
+        cat = str(event.get("cat", ""))
+        name = event_name(event)
+        row = (float(ts), float(ts + dur), float(dur), name, cat, event.get("pid"), event.get("tid"))
+        stat = by_name[name]
+        stat[0] += 1
+        stat[1] += dur
+        stat[2] = max(stat[2], dur)
+        if cat in GPU_CATS:
+            gpu.append(row)
+            gstat = by_gpu_name[name]
+            gstat[0] += 1
+            gstat[1] += dur
+            gstat[2] = max(gstat[2], dur)
+        elif cat in CPU_CATS:
+            cpu.append(row)
+        if "nccl" in name.lower():
+            nstat = nccl[(cat, name)]
+            nstat[0] += 1
+            nstat[1] += dur
+            nstat[2] = max(nstat[2], dur)
+
+    print(f"\n== {path}")
+    print(f"events={len(events)} gpu_events={len(gpu)} cpu_events={len(cpu)}")
+    if not gpu:
+        print("No GPU events found.")
+        return
+
+    gpu.sort()
+    merged: list[list[Any]] = []
+    for start, end, dur, name, cat, pid, tid in gpu:
+        if not merged or start > merged[-1][1]:
+            merged.append([start, end, [(start, end, dur, name, cat, pid, tid)]])
+        else:
+            merged[-1][1] = max(merged[-1][1], end)
+            merged[-1][2].append((start, end, dur, name, cat, pid, tid))
+
+    span = max(end for _, end, *_ in gpu) - min(start for start, *_ in gpu)
+    busy = sum(end - start for start, end, _ in merged)
+    idle = span - busy
+    print(
+        f"gpu_span_s={span / 1e6:.3f} "
+        f"busy_union_s={busy / 1e6:.3f} "
+        f"idle_union_s={idle / 1e6:.3f} "
+        f"idle_pct={idle / span * 100:.2f}"
+    )
+
+    interesting_cpu = [
+        row
+        for row in cpu
+        if row[2] >= 1000
+        and (
+            row[4] in {"python_function", "user_annotation"}
+            or "cudaStreamSynchronize" in row[3]
+            or "cudaDeviceSynchronize" in row[3]
+            or "cudaLaunch" in row[3]
+            or "cudaMemcpy" in row[3]
+        )
+    ]
+
+    gaps = []
+    for idx in range(1, len(merged)):
+        gap_start = merged[idx - 1][1]
+        gap_end = merged[idx][0]
+        gap_dur = gap_end - gap_start
+        if gap_dur >= min_gap_us:
+            prev_event = max(merged[idx - 1][2], key=lambda x: x[1])
+            next_event = min(merged[idx][2], key=lambda x: x[0])
+            mid = (gap_start + gap_end) / 2
+            containers = [row for row in interesting_cpu if row[0] <= mid <= row[1]]
+            containers = sorted(containers, key=lambda x: x[2])[:8]
+            gaps.append((gap_dur, gap_start, gap_end, prev_event, next_event, containers))
+
+    print(f"gaps_ge_{min_gap_us / 1000:.3f}ms count={len(gaps)} sum_s={sum(g[0] for g in gaps) / 1e6:.3f}")
+    for gap_dur, gap_start, gap_end, prev_event, next_event, containers in sorted(gaps, reverse=True)[:topn]:
+        print(f"\nGAP {gap_dur / 1000:.3f} ms ts={gap_start:.0f}->{gap_end:.0f}")
+        print(f"  prev {prev_event[4]} {prev_event[2] / 1000:.3f} ms {prev_event[3][:160]}")
+        print(f"  next {next_event[4]} {next_event[2] / 1000:.3f} ms {next_event[3][:160]}")
+        for row in containers:
+            print(f"  in   {row[4]} {row[2] / 1000:.3f} ms {row[3][:180]}")
+
+    print("\nTop GPU/operator events by total duration:")
+    for name, (count, total, max_dur) in sorted(by_gpu_name.items(), key=lambda kv: kv[1][1], reverse=True)[:topn]:
+        print(f"  {int(count):8d} total={total / 1e6:9.3f}s max={max_dur / 1000:9.3f}ms {name[:180]}")
+
+    print("\nTop NCCL-like events by category:")
+    for (cat, name), (count, total, max_dur) in sorted(nccl.items(), key=lambda kv: kv[1][1], reverse=True)[:topn]:
+        print(f"  {int(count):8d} total={total / 1e6:9.3f}s max={max_dur / 1000:9.3f}ms cat={cat} {name[:160]}")
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("traces", nargs="+", type=Path, help="trace.json or trace.json.gz files")
+    parser.add_argument("--min-gap-ms", type=float, default=5.0, help="minimum GPU idle gap to print")
+    parser.add_argument("--topn", type=int, default=20, help="number of gaps/hotspots to print")
+    args = parser.parse_args()
+
+    for trace in args.traces:
+        summarize_trace(trace, args.min_gap_ms * 1000.0, args.topn)
+
+
+if __name__ == "__main__":
+    main()

.claude/skills/readme.md

@@ -18,6 +18,9 @@ include:
 
 - `add-diffusion-model`: guides integration of a new diffusion model into
   `vllm-omni`
+- `diffusion-perf-opt`: guides diffusion model performance optimization,
+  including profiling traces, parallel strategies, stage timing analysis, and
+  benchmark-driven tuning
 - `add-omni-model`: covers addition of new omni-modality model support
 - `add-tts-model`: covers integration of new TTS models and related serving
   workflows

.github/CODEOWNERS

@@ -3,15 +3,64 @@
 # More info: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
 
 # Default owners (fallback reviewers for all files)
-# later, we can add more reviewers here
-* @hsliuustc0106
+* @Gaohan123 @hsliuustc0106 @ywang96
 
-# Assign reviewers by directory
-/.github/ @owner1
-/tests/ @owner1
-/docs/ @owner1
+# Repository operations
+/.github/ @hsliuustc0106
 
-# Example: reviewers for specific directories
-# /examples/offline_inference/ @offline-inference-team
-# /vllm_omni/core/ @core-team
-# /vllm_omni/model_executor/ @model-team
+# Documentation and Recipes
+/docs/ @hsliuustc0106 @Gaohan123 @david6666666
+/recipes @hsliuustc0106 @Gaohan123 @david6666666
+
+# Skills
+/.claude/ @hsliuustc0106
+
+# Tests
+/tests/ @yenuo26
+
+# CI
+/.buildkite/ @yenuo26 @congw729
+
+# Engine and model_executor
+/vllm_omni/core/ @tzhouam @yinpeiqi @fake0fan
+/vllm_omni/engine/ @tzhouam @yinpeiqi @fake0fan
+/vllm_omni/entrypoints/ @tzhouam @yinpeiqi @fake0fan
+/vllm_omni/model_executor/ @tzhouam @gcanlin
+/vllm_omni/worker/ @tzhouam @gcanlin
+
+# Diffusion
+/vllm_omni/diffusion/ @Isotr0py @princepride @SamitHuang @wtomin @ZJY0516 @RuixiangMa @david6666666
+/vllm_omni/lora/ @princepride @SamitHuang @wtomin @ZJY0516 @RuixiangMa @yuanheng-zhao
+
+# Diffusion CPU offloading
+/vllm_omni/diffusion/offloader/ @Isotr0py @princepride @SamitHuang @wtomin @ZJY0516 @RuixiangMa @yuanheng-zhao
+
+# Omni and TTS support
+/vllm_omni/transformers_utils/ @tzhouam @yuanheng-zhao
+/vllm_omni/model_executor/models/ @linyueqian @ZeldaHuang @princepride @yuanheng-zhao @amy-why-3459 @Bounty-hunter
+
+# Benchmarks
+/benchmarks/accuracy/ @david6666666
+/benchmarks/build_dataset/ @linyueqian @yuanheng-zhao
+/benchmarks/diffusion/ @Isotr0py @princepride @SamitHuang @wtomin @ZJY0516 @RuixiangMa
+/benchmarks/distributed/ @princepride
+/benchmarks/glm_image/ @princepride @JaredforReal
+/benchmarks/tts/ @linyueqian @ZeldaHuang @princepride
+
+# Usability and Observability
+/vllm_omni/deploy/ @tzhouam @lishunyang12
+/vllm_omni/metrics/ @lishunyang12
+/vllm_omni/profiler/ @gcanlin
+
+# ComfyUI
+/apps/ @fhfuih
+
+# Large Scale Serving
+/vllm_omni/distributed/ @princepride @yuanheng-zhao @xuechendi @natureofnature @fake0fan
+
+# Quantization and configuration
+/vllm_omni/config/ @lishunyang12
+/vllm_omni/quantization/ @david6666666 @Isotr0py @lishunyang12
+
+# Hardware plugins and accelerators
+/vllm_omni/platforms/ @gcanlin @tjtanaa @xuechendi

.gitignore

@@ -239,6 +239,7 @@ data/
 datasets/
 *.csv
 *.json
+!tests/dfx/perf/tests/*.json
 !apps/ComfyUI-vLLM-Omni/example_workflows/*.json
 *.jsonl
 *.parquet

README.md

@@ -9,19 +9,19 @@ Easy, fast, and cheap omni-modality model serving for everyone
 </h3>
 
 <p align="center">
-| <a href="https://vllm-omni.readthedocs.io/en/latest/"><b>Documentation</b></a> | <a href="https://discuss.vllm.ai"><b>User Forum</b></a> | <a href="https://slack.vllm.ai"><b>Developer Slack</b></a> | <a href="docs/assets/WeChat.jpg"><b>WeChat</b></a> | <a href="https://arxiv.org/abs/2602.02204"><b>Paper</b></a> | <a href="https://docs.google.com/presentation/d/1XJWgv79lORl8rbaVvp2d5Sqs6ZEBgAgj/edit?slide=id.p1#slide=id.p1"><b>Slides</b></a> |
+| <a href="https://vllm-omni.readthedocs.io/en/latest/"><b>Documentation</b></a> | <a href="https://deepwiki.com/vllm-project/vllm-omni"><b>DeepWiki</b></a> | <a href="https://discuss.vllm.ai"><b>User Forum</b></a> | <a href="https://slack.vllm.ai"><b>Developer Slack</b></a> | <a href="docs/assets/WeChat.jpg"><b>WeChat</b></a> | <a href="https://arxiv.org/abs/2602.02204"><b>Paper</b></a> | <a href="https://docs.google.com/presentation/d/111-L8zF7A1j_YI_cR8JsblofdScdRr2f/edit?usp=sharing&ouid=110473603432222024453&rtpof=true&sd=true"><b>Slides</b></a> |
 </p>
 
 
 ---
 
 *Latest News* 🔥
+- [2026/05] We released [0.20.0](https://github.com/vllm-project/vllm-omni/releases/tag/v0.20.0) - refreshes the serving/runtime stack for large-scale omni workloads, and improves diffusion model performance, quantization, and hardware readiness across CUDA, ROCm, MUSA, NPU, and XPU backends.
 - [2026/03] We released [0.18.0](https://github.com/vllm-project/vllm-omni/releases/tag/v0.18.0) - strengthens the core runtime through a large entrypoint refactor and scheduler/runtime cleanups, expands unified quantization and diffusion execution, broadens multimodal model coverage, and improves production readiness across audio, omni, image, video, RL, and multi-platform deployments.
 - [2026/03] Check out our first public [project deepdive](https://youtu.be/sgwNfsNnR9I) at the vLLM Hong Kong Meetup!
 - [2026/03] **[vllm-omni-skills](https://github.com/hsliuustc0106/vllm-omni-skills)** is a community-driven collection of AI assistant skills that help developers work with vLLM-Omni more effectively. These skills can be used with popular agentic AI coding assistants like **Cursor IDE**, **Claude**, **Codex**, and more.
 - [2026/02] We released [0.16.0](https://github.com/vllm-project/vllm-omni/releases/tag/v0.16.0) - A major alignment + capability release that rebases onto **upstream vLLM v0.16.0** and significantly expands performance, distributed execution, and production readiness across **Qwen3-Omni / Qwen3-TTS**, **Bagel**, **MiMo-Audio**, **GLM-Image** and the **Diffusion (DiT) image/video stack**—while also improving platform coverage (CUDA / ROCm / NPU / XPU), CI quality, and documentation.
 - [2026/02] We released [0.14.0](https://github.com/vllm-project/vllm-omni/releases/tag/v0.14.0) - This is the first **stable release** of vLLM-Omni that expands Omni’s diffusion / image-video generation and audio / TTS stack, improves distributed execution and memory efficiency, and broadens platform/backend coverage (GPU/ROCm/NPU/XPU). It also brings meaningful upgrades to serving APIs, profiling & benchmarking, and overall stability. Please check our latest [paper](https://arxiv.org/abs/2602.02204) for architecture design and performance results.
-- [2026/01] We released [0.12.0rc1](https://github.com/vllm-project/vllm-omni/releases/tag/v0.12.0rc1) - a major RC milestone focused on maturing the diffusion stack, strengthening OpenAI-compatible serving, expanding omni-model coverage, and improving stability across platforms (GPU/NPU/ROCm).
 - [2025/11] vLLM community officially released [vllm-project/vllm-omni](https://github.com/vllm-project/vllm-omni) in order to support omni-modality models serving.
 
 ---

benchmarks/build_dataset/seed_tts_design/en/meta.lst

@@ -18,3 +18,13 @@ vd017|||The quarterly results exceed expectations across all major metrics.|A sh
 vd018|||Chapter one. The morning sun filtered gently through the forest canopy.|A smooth, rich male audiobook narrator voice, expressive and engaging.
 vd019|||To be or not to be, that is the question.|A theatrical female voice, dramatic and expressive, stage projection quality.
 vd020|||And that is all for tonight. Stay well out there, everyone.|A warm, velvety male late-night radio DJ voice, smooth and intimate.
+vd021|||Please fasten your seatbelts; we will be experiencing some turbulence shortly.|A calm, professional female flight attendant voice, reassuring and clear.
+vd022|||The fossil record suggests these creatures lived more than sixty million years ago.|A measured male documentary narrator voice, scientific and curious.
+vd023|||Hey kiddo, did you finish your homework before dinner today?|A gentle, caring father voice, warm and slightly tired after a long day.
+vd024|||Live from courtside, the home team has just taken a commanding lead.|A high-energy male sports broadcaster, urgent and engaged.
+vd025|||Please remain on the line while I transfer you to the next available agent.|A polite, neutral female call-center voice, professional and patient.
+vd026|||I have a dream that one day this nation will rise up and live out the true meaning of its creed.|A powerful, resonant male orator voice, slow and impassioned.
+vd027|||Mama always said life was like a box of chocolates; you never know what you're gonna get.|A folksy male voice with a Southern American accent, warm and reflective.
+vd028|||Ahoy there, matey! Hoist the colors and prepare to set sail.|A theatrical pirate male voice, gruff and boisterous.
+vd029|||Ladies and gentlemen, please welcome to the stage our keynote speaker.|A polished female event MC voice, gracious and articulate.
+vd030|||Once you've completed the form, click submit and we'll review it within two business days.|A friendly female product-onboarding voice, encouraging and clear.

benchmarks/build_dataset/seed_tts_smoke/en/meta.lst

@@ -18,3 +18,13 @@ smoke017|||In the distance, the mountains were shrouded in thick morning fog.
 smoke018|||Our company reported record revenue for the fourth quarter of the fiscal year.
 smoke019|||She explained the new policy in detail during the staff meeting this morning.
 smoke020|||The children laughed and played in the garden until the sun began to set.
+smoke021|||A long line of cars stretched along the coastal highway after the lighthouse opened.
+smoke022|||The chef recommended the seared scallops with a lemon butter sauce as the special.
+smoke023|||Our quarterly engineering review begins promptly at two in the afternoon on Thursday.
+smoke024|||Despite the heavy rain, the marathon runners kept a steady pace through downtown.
+smoke025|||She finished the crossword puzzle in under fifteen minutes while sipping her tea.
+smoke026|||The new release adds streaming output, faster startup, and better error reporting.
+smoke027|||His grandfather taught him how to whittle small wooden birds from cedar offcuts.
+smoke028|||Travelers were advised to check the timetable since trains were running on a holiday schedule.
+smoke029|||The startup launched a public beta after eighteen months of closed development.
+smoke030|||At night the desert sky filled with stars so bright the Milky Way was clearly visible.

benchmarks/diffusion/README.md

@@ -30,10 +30,8 @@ python3 benchmarks/diffusion/diffusion_benchmark_serving.py \
 
 **Notes**
 
-- The benchmark talks to `http://<host>:<port>/v1/chat/completions`.
+- By default, image tasks talk to `http://<host>:<port>/v1/chat/completions`; video tasks talk to `/v1/videos`.
 - If you run the server on another host or port, pass `--base-url` accordingly.
-- To compare diffusion multi-replica serving, restart the server with different
-  `runtime.num_replicas` values and keep the benchmark parameters unchanged.
 
 ## 2. Supported Datasets
 
@@ -95,39 +93,11 @@ You can point to your own trace using `--dataset-path`.
 
 ## 3. Benchmark Parameters
 
-### Multi-replica sweep
-
-For replica scaling, use the same model, prompt count, image/video size, and
-step count for every run. Change only the serving stage config:
-
-```yaml
-runtime:
-  devices: "0,1,2,3"
-  num_replicas: 4
-```
-
-Then run a fixed benchmark and write one JSON file per replica count:
-
-```bash
-python3 benchmarks/diffusion/diffusion_benchmark_serving.py \
-  --base-url http://localhost:8099 \
-  --model Qwen/Qwen-Image \
-  --task t2i \
-  --dataset random \
-  --num-prompts 32 \
-  --max-concurrency 8 \
-  --request-rate inf \
-  --num-inference-steps 10 \
-  --width 512 --height 512 \
-  --output-file diffusion_replica_4.json
-```
-
-Repeat for `num_replicas=1`, `2`, `3`, and `4`, using matching `runtime.devices`.
-
 ### Basic flags
 
-- `--base-url`: Server address (the script calls `.../v1/chat/completions`).
+- `--base-url`: Server address; `--endpoint` selects the path appended to this base URL.
 - `--model`: The OpenAI-compatible `model` field.
+- `--endpoint`: API endpoint path. Leading `/` is optional, e.g. `/v1/videos` or `v1/videos`.
 - `--task`: Task type (e.g., `t2i`, `t2v`, `i2i`, `i2v`).
 - `--dataset`: Dataset mode (`vbench` / `trace` / `random`).
 - `--num-prompts`: Number of requests to send.

benchmarks/diffusion/backends.py

@@ -10,6 +10,8 @@ from typing import Any
 import aiohttp
 from tqdm import tqdm
 
+DEFAULT_EDITS_BOT_TASK = "think"
+
 
 @dataclass
 class RequestFuncInput:
@@ -27,6 +29,7 @@ class RequestFuncInput:
     extra_body: dict[str, Any] = field(default_factory=dict)
     image_paths: list[str] | None = None
     request_id: str = field(default_factory=lambda: str(uuid.uuid4()))
+    default_bot_task: str | None = DEFAULT_EDITS_BOT_TASK
 
 
 @dataclass
@@ -53,6 +56,95 @@ def _encode_image_as_data_url(path: str) -> str:
     return f"data:{mime};base64,{encoded}"
 
 
+async def async_request_image_edits(
+    input: RequestFuncInput,
+    session: aiohttp.ClientSession,
+    pbar: tqdm | None = None,
+    enable_diffusion_pipeline_profiler: bool = False,
+) -> RequestFuncOutput:
+    """POST /v1/images/edits (multipart)."""
+    del enable_diffusion_pipeline_profiler
+    output = RequestFuncOutput()
+    output.start_time = time.perf_counter()
+
+    extra_body = dict(input.extra_body)
+    width = input.width or extra_body.get("width") or 1024
+    height = input.height or extra_body.get("height") or 1024
+    edits_url = input.api_url
+
+    form = aiohttp.FormData()
+    form.add_field("model", input.model)
+    form.add_field("prompt", input.prompt)
+    form.add_field("size", f"{width}x{height}")
+    form.add_field("response_format", "b64_json")
+
+    if input.num_inference_steps is not None:
+        form.add_field("num_inference_steps", str(input.num_inference_steps))
+    elif extra_body.get("num_inference_steps") is not None:
+        form.add_field("num_inference_steps", str(extra_body["num_inference_steps"]))
+
+    if input.seed is not None:
+        form.add_field("seed", str(input.seed))
+    elif extra_body.get("seed") is not None:
+        form.add_field("seed", str(extra_body["seed"]))
+
+    if extra_body.get("guidance_scale") is not None:
+        form.add_field("guidance_scale", str(extra_body["guidance_scale"]))
+    if extra_body.get("negative_prompt") is not None:
+        form.add_field("negative_prompt", str(extra_body["negative_prompt"]))
+    if extra_body.get("true_cfg_scale") is not None:
+        form.add_field("true_cfg_scale", str(extra_body["true_cfg_scale"]))
+    if extra_body.get("sys_type") is not None:
+        form.add_field("sys_type", str(extra_body["sys_type"]))
+    if extra_body.get("system_prompt") is not None:
+        form.add_field("system_prompt", str(extra_body["system_prompt"]))
+
+    bot_task = extra_body.get("bot_task")
+    if bot_task is None and input.default_bot_task is not None:
+        bot_task = input.default_bot_task
+    if bot_task is not None:
+        form.add_field("bot_task", str(bot_task))
+
+    assert input.image_paths is not None
+    for img_path in input.image_paths:
+        if not os.path.exists(img_path):
+            output.error = f"Image file not found: {img_path}"
+            output.success = False
+            if pbar:
+                pbar.update(1)
+            return output
+        with open(img_path, "rb") as img_f:
+            image_bytes = img_f.read()
+        form.add_field(
+            "image",
+            image_bytes,
+            filename=os.path.basename(img_path),
+            content_type=_guess_mime_type(img_path),
+        )
+
+    try:
+        async with session.post(edits_url, data=form) as response:
+            if response.status == 200:
+                resp_json = await response.json()
+                output.response_body = resp_json
+                output.success = True
+            else:
+                output.error = f"HTTP {response.status}: {await response.text()}"
+                output.success = False
+    except Exception as e:
+        output.error = str(e)
+        output.success = False
+
+    output.latency = time.perf_counter() - output.start_time
+
+    if output.success and input.slo_ms is not None:
+        output.slo_achieved = (output.latency * 1000.0) <= float(input.slo_ms)
+
+    if pbar:
+        pbar.update(1)
+    return output
+
+
 async def async_request_chat_completions(
     input: RequestFuncInput,
     session: aiohttp.ClientSession,
@@ -151,7 +243,7 @@ async def async_request_chat_completions(
     return output
 
 
-async def async_request_openai_images(
+async def async_request_openai_image_generations(
     input: RequestFuncInput,
     session: aiohttp.ClientSession,
     pbar: tqdm | None = None,
@@ -348,12 +440,39 @@ async def async_request_v1_videos(
     return output
 
 
+LEGACY_BACKEND_ENDPOINT_ALIASES = {
+    "vllm-omni": "/v1/chat/completions",
+    "openai": "/v1/images/generations",
+}
+
+
+def normalize_endpoint(value: str) -> str:
+    endpoint = str(value).strip()
+    if not endpoint:
+        raise ValueError("endpoint must not be empty.")
+    endpoint = LEGACY_BACKEND_ENDPOINT_ALIASES.get(
+        endpoint,
+        LEGACY_BACKEND_ENDPOINT_ALIASES.get(endpoint.lstrip("/"), endpoint),
+    )
+    if not endpoint.startswith("/"):
+        endpoint = f"/{endpoint}"
+    return endpoint
+
+
+def endpoint_filename_token(value: str) -> str:
+    token = normalize_endpoint(value).lstrip("/")
+    for bad in ("/", "\\", ":", "*", "?", '"', "<", ">", "|"):
+        token = token.replace(bad, "_")
+    return token or "endpoint"
+
+
 backends_function_mapping = {
     "2i": {
-        "vllm-omni": (async_request_chat_completions, "/v1/chat/completions"),
-        "openai": (async_request_openai_images, "/v1/images/generations"),
+        "/v1/chat/completions": (async_request_chat_completions, "/v1/chat/completions"),
+        "/v1/images/generations": (async_request_openai_image_generations, "/v1/images/generations"),
+        "/v1/images/edits": (async_request_image_edits, "/v1/images/edits"),
     },
     "2v": {
-        "v1/videos": (async_request_v1_videos, "/v1/videos"),
+        "/v1/videos": (async_request_v1_videos, "/v1/videos"),
     },
 }

benchmarks/diffusion/diffusion_benchmark_serving.py

@@ -6,31 +6,34 @@
 Benchmark online serving for diffusion models (Image/Video Generation).
 If you want to use i2v, i2i dataset, you should `uv pip install gdown` first
 
-Supports multiple backends:
-    - vllm-omni: Uses /v1/chat/completions endpoint (default)
-    - openai: Uses /v1/images/generations endpoint
-    - v1/videos: Use /v1/videos endpoint
+Supports multiple endpoints:
+    - /v1/chat/completions: OpenAI chat-compatible image requests (e.g. t2i, Qwen i2i)
+    - /v1/images/edits: OpenAI image edit / IT2I (multipart; e.g. Hunyuan --bot-task think)
+    - /v1/images/generations: OpenAI image generation requests
+    - /v1/videos: Async video jobs
+
+Legacy --backend vllm-omni and openai are aliases for chat/completions and images/generations.
 
 Usage:
-    # Video (v1/videos backend)
+    # Video (/v1/videos endpoint)
     t2v:
     python3 benchmarks/diffusion/diffusion_benchmark_serving.py \
-        --backend v1/videos --dataset vbench --task t2v --num-prompts 10 \
+        --endpoint /v1/videos --dataset vbench --task t2v --num-prompts 10 \
         --height 480 --width 640 --fps 16 --num-frames 80
 
     i2v:
     python3 benchmarks/diffusion/diffusion_benchmark_serving.py \
-        --backend v1/videos --dataset vbench --task i2v --num-prompts 10
+        --endpoint /v1/videos --dataset vbench --task i2v --num-prompts 10
 
 
-    # Image (vllm-omni backend)
+    # Image (/v1/chat/completions endpoint)
     t2i:
     python3 benchmarks/diffusion/diffusion_benchmark_serving.py \
-        --backend vllm-omni --dataset vbench --task t2i --num-prompts 10 \
+        --endpoint /v1/chat/completions --dataset vbench --task t2i --num-prompts 10 \
         --height 1024 --width 1024
 
     python3 benchmarks/diffusion/diffusion_benchmark_serving.py \
-        --backend vllm-omni --dataset random --task t2i --num-prompts 1 \
+        --endpoint /v1/chat/completions --dataset random --task t2i --num-prompts 1 \
         --max-concurrency 1 --enable-negative-prompt \
         --random-request-config '[
             {"width":512,"height":512,"num_inference_steps":20,"weight":0.15},
@@ -39,20 +42,25 @@ Usage:
             {"width":1536,"height":1536,"num_inference_steps":35,"weight":0.15}
         ]'
 
-    i2i:
+    ti2i (Hunyuan / OpenAI image edit API):
     python3 benchmarks/diffusion/diffusion_benchmark_serving.py \
-        --backend vllm-omni --dataset vbench --task i2i --num-prompts 10
+        --endpoint /v1/images/edits --dataset random --task ti2i --num-prompts 10 \
+        --bot-task think
 
-    # Image (openai backend)
+    i2i (chat-based models such as Qwen-Image-Edit):
+    python3 benchmarks/diffusion/diffusion_benchmark_serving.py \
+        --endpoint /v1/chat/completions --dataset vbench --task i2i --num-prompts 10
+
+    # Image (/v1/images/generations endpoint)
     t2i:
     python3 benchmarks/diffusion/diffusion_benchmark_serving.py \
-        --backend openai --dataset vbench --task t2i --num-prompts 10 \
+        --endpoint /v1/images/generations --dataset vbench --task t2i --num-prompts 10 \
         --height 1024 --width 1024 --port 3000
 
     # Video (v1/videos)
     t2v:
     python3 benchmarks/diffusion/diffusion_benchmark_serving.py \
-        --backend v1/videos --dataset random --task t2v --num-prompts 1 \
+        --endpoint /v1/videos --dataset random --task t2v --num-prompts 1 \
         --max-concurrency 1 --enable-negative-prompt \
         --random-request-config '[
             {"width":854,"height":480,"num_inference_steps":18,"num_frames":120,"fps":24,"weight":1}
@@ -80,7 +88,12 @@ from typing import Any
 import aiohttp
 import numpy as np
 import requests
-from backends import RequestFuncInput, RequestFuncOutput, backends_function_mapping
+from backends import (
+    RequestFuncInput,
+    RequestFuncOutput,
+    backends_function_mapping,
+    normalize_endpoint,
+)
 from PIL import Image
 from tqdm.asyncio import tqdm
 
@@ -127,7 +140,7 @@ class VBenchDataset(BaseDataset):
     def _load_data(self) -> list[dict[str, Any]]:
         if self.args.task == "t2v":
             return self._load_t2v_prompts()
-        elif self.args.task in ["i2v", "ti2v", "ti2i", "i2i"]:
+        elif self.args.task in ["i2v", "ti2v", "ti2i", "i2i", "it2i"]:
             return self._load_i2v_data()
         else:
             return self._load_t2v_prompts()
@@ -519,7 +532,7 @@ class TraceDataset(BaseDataset):
             single = row.get("image_path")
             image_paths = [single] if single else None
 
-        if not image_paths and self.args.task in ["i2v", "i2i", "ti2v", "ti2i"]:
+        if not image_paths and self.args.task in ["i2v", "i2i", "ti2v", "ti2i", "it2i"]:
             raise ValueError(
                 f"Task {self.args.task} requires image input, but no image_path or image_paths found in trace row."
             )
@@ -580,7 +593,7 @@ class RandomDataset(BaseDataset):
             self._sampled_requests = None
 
         # Random image generate
-        if self.args.task in ["i2v", "ti2v", "ti2i", "i2i"]:
+        if self.args.task in ["i2v", "ti2v", "ti2i", "i2i", "it2i"]:
             self._random_image_path = self._generate_random_image_paths()
         else:
             self._random_image_path = None
@@ -883,13 +896,23 @@ def wait_for_service(base_url: str, timeout: int = 120) -> None:
         time.sleep(1)
 
 
+def _default_endpoint_for_task(task: str) -> str:
+    if task in {"t2v", "i2v", "ti2v"}:
+        return "/v1/videos"
+    if task in {"i2i", "ti2i", "it2i"}:
+        return "/v1/images/edits"
+    if task == "t2i":
+        return "/v1/chat/completions"
+    raise ValueError(f"Unsupported task for endpoint resolution: {task}")
+
+
 async def benchmark(args):
     # Construct base_url if not provided
     if args.base_url is None:
         args.base_url = f"http://{args.host}:{args.port}"
 
     VIDEO_TASKS = {"t2v", "i2v", "ti2v"}
-    IMAGE_TASKS = {"t2i", "i2i", "ti2i"}
+    IMAGE_TASKS = {"t2i", "i2i", "ti2i", "it2i"}
 
     if args.task in VIDEO_TASKS:
         task_type = "2v"
@@ -902,18 +925,23 @@ async def benchmark(args):
             f"Valid image tasks: {sorted(IMAGE_TASKS)}"
         )
 
-    valid_backends = sorted(backends_function_mapping[task_type].keys())
+    raw_endpoint = args.endpoint if args.endpoint is not None else args.backend
+    if raw_endpoint is None:
+        raw_endpoint = _default_endpoint_for_task(args.task)
+    args.endpoint = normalize_endpoint(raw_endpoint)
 
-    if args.backend not in valid_backends:
+    valid_endpoints = sorted(backends_function_mapping[task_type].keys())
+
+    if args.endpoint not in valid_endpoints:
         logger.error(
-            f"Invalid backend '{args.backend}' for task '{args.task}' (task type: '{task_type}').\n"
-            f"Valid backends for this task type: {valid_backends}\n"
-            f"Example usage: --task {args.task} --backend {valid_backends[0]}"
+            f"Invalid endpoint '{args.endpoint}' for task '{args.task}' (task type: '{task_type}').\n"
+            f"Valid endpoints for this task type: {valid_endpoints}\n"
+            f"Example usage: --task {args.task} --endpoint {valid_endpoints[0]}"
         )
-        raise ValueError("Backend validation failed. See log above for valid options.")
+        raise ValueError("Endpoint validation failed. See log above for valid options.")
 
-    # Setup API URL and request function based on backend
-    request_func, api_url = backends_function_mapping[task_type][args.backend]
+    # Setup API URL and request function based on endpoint.
+    request_func, api_url = backends_function_mapping[task_type][args.endpoint]
     api_url = f"{args.base_url}{api_url}"
 
     if args.dataset == "vbench":
@@ -929,6 +957,10 @@ async def benchmark(args):
     requests_list = dataset.get_requests()
     print(f"Prepared {len(requests_list)} requests from {args.dataset} dataset.")
 
+    if args.endpoint == "/v1/images/edits":
+        for req in requests_list:
+            req.default_bot_task = args.bot_task
+
     # Limit concurrency
     if args.max_concurrency is not None:
         semaphore = asyncio.Semaphore(args.max_concurrency)
@@ -976,15 +1008,17 @@ async def benchmark(args):
     metrics = calculate_metrics(outputs, total_duration, requests_list, args, args.slo)
 
     # Add configuration info to metrics for JSON output
-    metrics["backend"] = args.backend
+    metrics["endpoint"] = args.endpoint
     metrics["model"] = args.model
     metrics["dataset"] = args.dataset
     metrics["task"] = args.task
+    if args.endpoint == "/v1/images/edits":
+        metrics["bot_task"] = args.bot_task
 
-    print("\n{s:{c}^{n}}".format(s=" Serving Benchmark Result ", n=60, c="="))
+    print("\n{s:{c}^{n}}".format(s=" Serving Benchmark Result ", n=50, c="="))
 
     # Section 1: Configuration
-    print("{:<40} {:<15}".format("Backend:", args.backend))
+    print("{:<40} {:<15}".format("Endpoint:", args.endpoint))
     print("{:<40} {:<15}".format("Model:", args.model))
     print("{:<40} {:<15}".format("Dataset:", args.dataset))
     print("{:<40} {:<15}".format("Task:", args.task))
@@ -1047,12 +1081,17 @@ if __name__ == "__main__":
     parser.add_argument("--host", type=str, default="localhost", help="Server host.")
     parser.add_argument("--port", type=int, default=8091, help="Server port.")
     parser.add_argument("--model", type=str, default="default", help="Model name.")
+    parser.add_argument(
+        "--endpoint",
+        type=str,
+        default=None,
+        help=("Endpoint path to target. Leading '/' is optional, e.g. /v1/videos or v1/videos."),
+    )
     parser.add_argument(
         "--backend",
         type=str,
-        default="vllm-omni",
-        choices=["vllm-omni", "openai", "v1/videos"],
-        help="Backend to target the benchmark to.",
+        default=None,
+        help=argparse.SUPPRESS,
     )
     parser.add_argument(
         "--dataset",
@@ -1065,7 +1104,7 @@ if __name__ == "__main__":
         "--task",
         type=str,
         default="t2v",
-        choices=["t2v", "i2v", "ti2v", "ti2i", "i2i", "t2i"],
+        choices=["t2v", "i2v", "ti2v", "ti2i", "i2i", "it2i", "t2i"],
         help="Task type.",
     )
     parser.add_argument(
@@ -1172,9 +1211,15 @@ if __name__ == "__main__":
         default=1,
         help=(
             "Number of synthetic input images to attach for image-conditioned tasks "
-            "(i2v, ti2v, ti2i, i2i) when using random dataset."
+            "(i2v, ti2v, ti2i, i2i, it2i) when using random dataset."
         ),
     )
+    parser.add_argument(
+        "--bot-task",
+        type=str,
+        default="think",
+        help=("bot_task form field for --endpoint /v1/images/edits (think, recaption, think_recaption, vanilla)."),
+    )
 
     args = parser.parse_args()
     asyncio.run(benchmark(args))

benchmarks/diffusion/performance_dashboard/qwen_image_serving_performance.md

@@ -58,7 +58,7 @@ Record these parameters when reporting performance results.
 
 ```bash
 python benchmarks/diffusion/diffusion_benchmark_serving.py \
-    --backend vllm-omni \
+    --endpoint /v1/chat/completions \
     --dataset <DATASET_NAME> \
     --task t2i \
     --num-prompts <N> \
@@ -71,7 +71,7 @@ python benchmarks/diffusion/diffusion_benchmark_serving.py \
 
 | Parameter              | Description                       |
 | ---------------------- | --------------------------------- |
-| `--backend`            | Serving backend (use `vllm-omni`) |
+| `--endpoint`           | API endpoint (use `/v1/chat/completions`; leading `/` is optional) |
 | `--dataset`            | Dataset name (`random` or custom) |
 | `--task`               | Task type (e.g., `t2i`)           |
 | `--num-prompts`        | Total number of requests          |
@@ -129,7 +129,7 @@ python benchmarks/diffusion/diffusion_benchmark_serving.py \
 
 ```bash
 python benchmarks/diffusion/diffusion_benchmark_serving.py \
-    --backend vllm-omni \
+    --endpoint /v1/chat/completions \
     --dataset random \
     --task t2i \
     --num-prompts 1 \

benchmarks/diffusion/performance_dashboard/wan_2_2_serving_performance.md

@@ -53,7 +53,7 @@ Record these parameters when reporting performance results.
 
 ```bash
 python benchmarks/diffusion/diffusion_benchmark_serving.py \
-    --backend v1/videos \
+    --endpoint /v1/videos \
     --dataset <DATASET_NAME> \
     --task t2v \
     --num-prompts <N> \
@@ -66,7 +66,7 @@ python benchmarks/diffusion/diffusion_benchmark_serving.py \
 
 | Parameter              | Description                       |
 | ---------------------- | --------------------------------- |
-| `--backend`            | Serving backend (use `v1/videos`) |
+| `--endpoint`           | API endpoint (use `/v1/videos`; leading `/` is optional) |
 | `--dataset`            | Dataset name (`random` or custom) |
 | `--task`               | Task type (e.g., `t2v`)           |
 | `--num-prompts`        | Total number of requests          |
@@ -120,7 +120,7 @@ python benchmarks/diffusion/diffusion_benchmark_serving.py \
 
 ```bash
 python benchmarks/diffusion/diffusion_benchmark_serving.py \
-    --backend v1/videos \
+    --endpoint /v1/videos \
     --dataset random \
     --task t2v \
     --num-prompts 1 \

benchmarks/diffusion/quantization_quality.py

@@ -34,6 +34,16 @@ Video example (text-to-video):
         --height 720 --width 1280 \
         --num-frames 81 --num-inference-steps 40 --seed 42
 
+LTX-2 example (text-to-video; audio output is generated but not scored by LPIPS):
+    python benchmarks/diffusion/quantization_quality.py \
+        --model Lightricks/LTX-Video-2 \
+        --task t2v \
+        --quantization fp8 int8 \
+        --prompts \
+            "A serene lakeside sunrise with mist over the water" \
+        --height 704 --width 1216 \
+        --num-frames 121 --num-inference-steps 40 --seed 42
+
 Multiple quantization methods:
     python benchmarks/diffusion/quantization_quality.py \
         --model Tongyi-MAI/Z-Image-Turbo \
@@ -148,10 +158,11 @@ def _build_omni_kwargs(args, quantization=None):
 def _generate_image(omni, args, prompt, seed):
     """Generate a single image and return (PIL.Image, time_seconds, memory_gib)."""
     from vllm_omni.inputs.data import OmniDiffusionSamplingParams
+    from vllm_omni.outputs import OmniRequestOutput
     from vllm_omni.platforms import current_omni_platform
 
     generator = torch.Generator(device=current_omni_platform.device_type).manual_seed(seed)
-    torch.cuda.reset_peak_memory_stats()
+    torch.accelerator.reset_peak_memory_stats()
     start = time.perf_counter()
     outputs = omni.generate(
         {"prompt": prompt},
@@ -163,10 +174,11 @@ def _generate_image(omni, args, prompt, seed):
         ),
     )
     elapsed = time.perf_counter() - start
-    peak_mem = torch.cuda.max_memory_allocated() / (1024**3)
+    peak_mem = torch.accelerator.max_memory_allocated() / (1024**3)
 
-    first = outputs[0]
-    req_out = first.request_output[0] if hasattr(first, "request_output") else first
+    req_out = OmniRequestOutput.unwrap_result(outputs)
+    if not req_out.images:
+        raise ValueError("Could not extract image output from result.")
     img = req_out.images[0]
     return img, elapsed, peak_mem
 
@@ -178,7 +190,7 @@ def _generate_video(omni, args, prompt, seed):
     from vllm_omni.platforms import current_omni_platform
 
     generator = torch.Generator(device=current_omni_platform.device_type).manual_seed(seed)
-    torch.cuda.reset_peak_memory_stats()
+    torch.accelerator.reset_peak_memory_stats()
     start = time.perf_counter()
     outputs = omni.generate(
         {"prompt": prompt, "negative_prompt": ""},
@@ -192,7 +204,7 @@ def _generate_video(omni, args, prompt, seed):
         ),
     )
     elapsed = time.perf_counter() - start
-    peak_mem = torch.cuda.max_memory_allocated() / (1024**3)
+    peak_mem = torch.accelerator.max_memory_allocated() / (1024**3)
 
     first = outputs[0]
     if hasattr(first, "request_output") and isinstance(first.request_output, list):
@@ -202,10 +214,19 @@ def _generate_video(omni, args, prompt, seed):
         else:
             frames = inner
     elif hasattr(first, "images") and first.images:
-        frames = first.images
+        frames = first.images[0]
     else:
         raise ValueError("Could not extract video frames from output.")
 
+    # LTX-2 (and similar audio+video models) may surface a dict or (video, audio) tuple
+    if isinstance(frames, dict):
+        frames = frames.get("video") or frames.get("frames")
+    elif isinstance(frames, tuple) and len(frames) == 2:
+        frames = frames[0]
+
+    if frames is None:
+        raise ValueError("Could not extract video frames from output.")
+
     if isinstance(frames, torch.Tensor):
         video = frames.detach().cpu()
         if video.dim() == 5:
@@ -223,13 +244,15 @@ def _generate_video(omni, args, prompt, seed):
     return frames_array, elapsed, peak_mem
 
 
-def _unload_omni(omni):
-    """Delete Omni instance and free GPU memory."""
-    del omni
+def _free_gpu_memory():
+    """Force GC and release cached GPU memory.
+
+    Must be called AFTER the caller has dropped (i.e., via `del`)
+    every reference to the Omni instance"""
     gc.collect()
     if torch.cuda.is_available():
-        torch.cuda.empty_cache()
-        torch.cuda.synchronize()
+        torch.accelerator.empty_cache()
+        torch.accelerator.synchronize()
 
 
 def run_benchmark(args):
@@ -265,7 +288,9 @@ def run_benchmark(args):
 
     bl_avg_time = np.mean([v[1] for v in baseline_outputs.values()])
     bl_mem = baseline_outputs[prompts[0]][2]  # use first prompt's memory
-    _unload_omni(omni_bl)
+    omni_bl.shutdown()
+    del omni_bl
+    _free_gpu_memory()
 
     # Save baseline outputs
     bl_dir = output_dir / "baseline"
@@ -305,7 +330,9 @@ def run_benchmark(args):
 
         qt_avg_time = np.mean([v[1] for v in qt_outputs.values()])
         qt_mem = qt_outputs[prompts[0]][2]
-        _unload_omni(omni_qt)
+        omni_qt.shutdown()
+        del omni_qt
+        _free_gpu_memory()
 
         # Save quantized outputs
         qt_dir = output_dir / config_label.replace(" ", "_")

benchmarks/distributed/omni_connectors/cross_node_mooncake_transfer_engine.py

@@ -614,8 +614,8 @@ Examples:
         if not torch.cuda.is_available():
             print("[ERROR] CUDA is not available but GPU mode was requested.")
             sys.exit(1)
-        if args.gpu_id >= torch.cuda.device_count():
-            print(f"[ERROR] GPU {args.gpu_id} not available. Found {torch.cuda.device_count()} GPUs.")
+        if args.gpu_id >= torch.accelerator.device_count():
+            print(f"[ERROR] GPU {args.gpu_id} not available. Found {torch.accelerator.device_count()} GPUs.")
             sys.exit(1)
         print(f"[INFO] Using GPU {args.gpu_id}: {torch.cuda.get_device_name(args.gpu_id)}")
 

benchmarks/tts/README.md

@@ -40,7 +40,7 @@ vllm bench serve --omni \
     --num-prompts 20 --num-warmups 2 \
     --extra-body '{"task_type":"Base"}' \
     --max-concurrency 1 --request-rate inf \
-    --percentile-metrics ttft,e2el,audio_rtf,audio_ttfp,audio_duration \
+    --percentile-metrics ttft,e2el,audio_rtf,audio_ttfp,audio_duration,audio_underrun \
     --save-result --result-dir ./results
 ```
 
@@ -58,7 +58,7 @@ vllm bench serve --omni \
     --num-prompts 20 --num-warmups 2 \
     --extra-body '{"voice":"Vivian","language":"English","task_type":"CustomVoice"}' \
     --max-concurrency 1 --request-rate inf \
-    --percentile-metrics ttft,e2el,audio_rtf,audio_ttfp,audio_duration \
+    --percentile-metrics ttft,e2el,audio_rtf,audio_ttfp,audio_duration,audio_underrun \
     --save-result --result-dir ./results
 ```
 
@@ -76,10 +76,28 @@ vllm bench serve --omni \
     --num-prompts 20 --num-warmups 2 \
     --extra-body '{"task_type":"VoiceDesign","language":"English"}' \
     --max-concurrency 1 --request-rate inf \
-    --percentile-metrics ttft,e2el,audio_rtf,audio_ttfp,audio_duration \
+    --percentile-metrics ttft,e2el,audio_rtf,audio_ttfp,audio_duration,audio_underrun \
     --save-result --result-dir ./results
 ```
 
+#### Streaming continuity (`audio_underrun`)
+
+`audio_underrun` (seconds) is the per-request worst-case buffer deficit
+under a realtime-rate player simulation. The audio-speech backend records
+chunk arrival times during the SSE stream and surfaces:
+
+- `Mean / Median / P{50,99} AUDIO_UNDERRUN (s)` per the standard percentile
+  output - any positive value means at least one inter-chunk gap was longer
+  than the chunk's audio duration.
+- `Streaming continuity OK rate` - fraction of requests whose worst-case
+  underrun stayed under the threshold (default 100 ms, the commonly cited
+  "audible gap" budget). Override the threshold with
+  `VLLM_OMNI_BENCH_AUDIO_CONTINUITY_THRESHOLD_S=<float>`.
+
+This captures the failure mode where `RTF_p50 < 1` (server keeps up in
+aggregate) but per-stream chunk arrival is bursty enough that listeners
+still hear gaps - common at high concurrency on streaming TTS pipelines.
+
 #### Add WER / SIM / UTMOS to any of the above
 
 Append `--seed-tts-wer-eval` (and optionally `SEED_TTS_EVAL_DEVICE=cuda:0`
@@ -215,7 +233,6 @@ sentinel for regressions in this area.
 benchmarks/tts/
 ├── README.md                  (this file)
 ├── bench_tts.py               CLI — serve-mode benchmark driver
-├── bench_voxcpm_offline.py    CLI — offline VoxCPM benchmark (sync + streaming)
 ├── plot_results.py            Generate per-task / per-concurrency curves
 └── model_configs.yaml         Model registry (supported tasks + extra body)
 ```

benchmarks/tts/bench_tts.py

@@ -118,7 +118,7 @@ def build_bench_args(
         "--num-warmups",
         "2",
         "--percentile-metrics",
-        "ttft,e2el,audio_rtf,audio_ttfp,audio_duration",
+        "ttft,e2el,audio_rtf,audio_ttfp,audio_duration,audio_underrun",
     ]
 
     if resolved_dataset_path:

benchmarks/tts/bench_voxcpm_offline.py

@@ -1,922 +0,0 @@
-"""Offline VoxCPM benchmark for vLLM Omni.
-
-Supports both:
-- sync one-shot (Omni.generate)
-- streaming (AsyncOmni.generate with async_chunk config)
-- text-only synthesis
-- voice cloning
-- text/clone batch inputs from txt or jsonl
-
-Usage::
-
-    # Sync (default voice)
-    python benchmarks/tts/bench_voxcpm_offline.py \\
-        --model /path/to/VoxCPM \\
-        --text "Hello world" \\
-        --output-dir results/audio/
-
-    # Streaming (async_chunk)
-    python benchmarks/tts/bench_voxcpm_offline.py \\
-        --model /path/to/VoxCPM \\
-        --stage-configs-path vllm_omni/model_executor/stage_configs/voxcpm_async_chunk.yaml \\
-        --txt-prompts prompts.txt \\
-        --output-dir results/audio/
-
-    # Voice cloning batch via JSONL
-    python benchmarks/tts/bench_voxcpm_offline.py \\
-        --model /path/to/VoxCPM \\
-        --jsonl-prompts prompts.jsonl \\
-        --output-dir results/audio/
-"""
-
-from __future__ import annotations
-
-import asyncio
-import json
-import logging
-import os
-import tempfile
-import time
-import uuid
-from dataclasses import dataclass
-from pathlib import Path
-from typing import Any
-
-import torch
-from vllm.utils.argparse_utils import FlexibleArgumentParser
-
-from vllm_omni import AsyncOmni, Omni
-
-
-def _find_repo_root(start: Path) -> Path:
-    """Walk up from ``start`` until a repo marker is found.
-
-    Falls back to ``parents[2]`` for backwards compatibility if no marker hits
-    (which can only happen in unusual checkouts — the tree should always have
-    pyproject.toml + vllm_omni/ at the top level).
-    """
-    for candidate in [start, *start.parents]:
-        if (candidate / "pyproject.toml").is_file() and (candidate / "vllm_omni").is_dir():
-            return candidate
-    return start.parents[2]
-
-
-REPO_ROOT = _find_repo_root(Path(__file__).resolve())
-DEFAULT_STAGE_ASYNC = REPO_ROOT / "vllm_omni" / "model_executor" / "stage_configs" / "voxcpm_async_chunk.yaml"
-DEFAULT_STAGE_SYNC = REPO_ROOT / "vllm_omni" / "model_executor" / "stage_configs" / "voxcpm.yaml"
-
-logger = logging.getLogger(__name__)
-
-
-@dataclass(frozen=True, slots=True)
-class PromptSpec:
-    text: str
-    label: str
-    ref_audio: str | None = None
-    ref_text: str | None = None
-
-
-def _require_soundfile():
-    try:
-        import soundfile as sf  # type: ignore
-    except ModuleNotFoundError as exc:
-        raise RuntimeError(
-            "soundfile is required to write VoxCPM benchmark WAV outputs. Install it with: pip install soundfile"
-        ) from exc
-    return sf
-
-
-def _build_prompt(
-    args,
-    *,
-    text: str,
-    ref_audio: str | None = None,
-    ref_text: str | None = None,
-    global_request_id: str | None = None,
-) -> dict[str, Any]:
-    additional_information: dict[str, list[Any]] = {
-        "text": [text],
-        "cfg_value": [args.cfg_value],
-        "inference_timesteps": [args.inference_timesteps],
-        "min_len": [args.min_len],
-        "max_new_tokens": [args.max_new_tokens],
-    }
-    if args.streaming_prefix_len is not None:
-        additional_information["streaming_prefix_len"] = [args.streaming_prefix_len]
-
-    if ref_audio:
-        additional_information["ref_audio"] = [ref_audio]
-    if ref_text:
-        additional_information["ref_text"] = [ref_text]
-    if global_request_id is not None:
-        additional_information["global_request_id"] = [global_request_id]
-
-    return {
-        "prompt_token_ids": [1],
-        "additional_information": additional_information,
-    }
-
-
-def _extract_audio_tensor(mm: dict[str, Any]) -> torch.Tensor:
-    audio = mm.get("audio", mm.get("model_outputs"))
-    if audio is None:
-        raise ValueError("No audio output found in multimodal output.")
-    if isinstance(audio, list):
-        parts = [torch.as_tensor(a).float().cpu().reshape(-1) for a in audio]
-        audio = torch.cat(parts, dim=-1) if parts else torch.zeros(0)
-    if not isinstance(audio, torch.Tensor):
-        audio = torch.as_tensor(audio)
-    return audio.float().cpu().reshape(-1)
-
-
-def _extract_sample_rate(mm: dict[str, Any]) -> int:
-    sr_raw = mm.get("sr", 24000)
-    if isinstance(sr_raw, list) and sr_raw:
-        sr_raw = sr_raw[-1]
-    if hasattr(sr_raw, "item"):
-        return int(sr_raw.item())
-    return int(sr_raw)
-
-
-def _emit_offline_metrics(
-    *,
-    request_id: str,
-    elapsed_s: float,
-    first_audio_elapsed: float | None,
-    audio_duration_s: float,
-) -> None:
-    metrics = {
-        "request_id": request_id,
-        "ttfp_ms": round(first_audio_elapsed * 1000.0, 3) if first_audio_elapsed is not None else None,
-        "audio_duration_s": round(audio_duration_s, 6),
-        "rtf": round(elapsed_s / audio_duration_s, 6) if audio_duration_s > 0 else None,
-    }
-    print(f"[OfflineMetrics] {metrics}")
-
-
-def _write_audio_tensor(output_path: Path, audio_tensor: Any, sample_rate: int) -> None:
-    sf = _require_soundfile()
-    if isinstance(audio_tensor, torch.Tensor):
-        audio_np = audio_tensor.float().cpu().clamp(-1.0, 1.0).numpy()
-    else:
-        audio_np = torch.as_tensor(audio_tensor).float().cpu().clamp(-1.0, 1.0).numpy()
-    sf.write(
-        output_path,
-        audio_np,
-        sample_rate,
-        format="WAV",
-        subtype="PCM_16",
-    )
-
-
-def _save_wav(mm: dict[str, Any], output_dir: Path, request_id: str) -> Path:
-    output_dir.mkdir(parents=True, exist_ok=True)
-    output_path = output_dir / f"output_{request_id}.wav"
-    _write_audio_tensor(output_path, _extract_audio_tensor(mm), _extract_sample_rate(mm))
-    return output_path
-
-
-def _iter_request_multimodal_outputs(request_output: Any):
-    outputs = getattr(request_output, "outputs", None)
-    if outputs:
-        for output in outputs:
-            mm = getattr(output, "multimodal_output", None)
-            if isinstance(mm, dict):
-                yield mm
-
-    mm = getattr(request_output, "multimodal_output", None)
-    if isinstance(mm, dict):
-        yield mm
-
-
-def _read_non_empty_lines(path: str) -> list[str]:
-    with open(path, encoding="utf-8") as f:
-        return [line.strip() for line in f if line.strip()]
-
-
-def _load_prompt_specs(args) -> list[PromptSpec]:
-    specs: list[PromptSpec] = []
-
-    if args.txt_prompts is not None:
-        texts = _read_non_empty_lines(args.txt_prompts)
-        if not texts:
-            raise ValueError(f"No prompts found in {args.txt_prompts}")
-        for idx, text in enumerate(texts, start=1):
-            specs.append(
-                PromptSpec(
-                    text=text,
-                    label=f"item{idx:03d}",
-                    ref_audio=args.ref_audio,
-                    ref_text=args.ref_text,
-                )
-            )
-        return specs
-
-    if args.jsonl_prompts is not None:
-        with open(args.jsonl_prompts, encoding="utf-8") as f:
-            for line_no, raw_line in enumerate(f, start=1):
-                line = raw_line.strip()
-                if not line:
-                    continue
-                try:
-                    item = json.loads(line)
-                except json.JSONDecodeError as exc:
-                    raise ValueError(f"{args.jsonl_prompts}:{line_no} is not valid JSON: {exc}") from exc
-                if not isinstance(item, dict):
-                    raise ValueError(f"{args.jsonl_prompts}:{line_no} must be a JSON object")
-
-                text = item.get("text")
-                if not isinstance(text, str) or not text.strip():
-                    raise ValueError(f"{args.jsonl_prompts}:{line_no} requires non-empty string field 'text'")
-
-                ref_audio = item.get("ref_audio", args.ref_audio)
-                ref_text = item.get("ref_text", args.ref_text)
-                if (ref_audio is None) != (ref_text is None):
-                    raise ValueError(
-                        f"{args.jsonl_prompts}:{line_no} must provide both 'ref_audio' and 'ref_text' together"
-                    )
-
-                specs.append(
-                    PromptSpec(
-                        text=text.strip(),
-                        label=f"item{len(specs) + 1:03d}",
-                        ref_audio=ref_audio,
-                        ref_text=ref_text,
-                    )
-                )
-
-        if not specs:
-            raise ValueError(f"No prompts found in {args.jsonl_prompts}")
-        return specs
-
-    specs.append(
-        PromptSpec(
-            text=args.text,
-            label="item001",
-            ref_audio=args.ref_audio,
-            ref_text=args.ref_text,
-        )
-    )
-    return specs
-
-
-def _build_prompt_for_spec(args, spec: PromptSpec, *, global_request_id: str | None = None) -> dict[str, Any]:
-    return _build_prompt(
-        args,
-        text=spec.text,
-        ref_audio=spec.ref_audio,
-        ref_text=spec.ref_text,
-        global_request_id=global_request_id,
-    )
-
-
-def _count_voice_clone_prompts(prompt_specs: list[PromptSpec]) -> int:
-    return sum(1 for spec in prompt_specs if spec.ref_audio is not None)
-
-
-def _get_warmup_specs(prompt_specs: list[PromptSpec]) -> list[PromptSpec]:
-    return prompt_specs[:1]
-
-
-def _extract_stream_finished(stage_output: Any) -> bool:
-    request_output = getattr(stage_output, "request_output", None)
-    request_finished = getattr(request_output, "finished", None)
-    if request_finished is not None:
-        return bool(request_finished)
-    return bool(getattr(stage_output, "finished", False))
-
-
-def _build_profiled_stage_config(
-    stage_configs_path: str,
-    profiler_dir: str,
-) -> str:
-    stage_config_path = Path(stage_configs_path)
-    yaml_text = stage_config_path.read_text(encoding="utf-8")
-    injected_lines: list[str] = []
-    injected_count = 0
-
-    for line in yaml_text.splitlines():
-        injected_lines.append(line)
-        if line.strip() != "engine_args:":
-            continue
-        indent = line[: len(line) - len(line.lstrip())]
-        child_indent = indent + "  "
-        grandchild_indent = child_indent + "  "
-        injected_lines.extend(
-            [
-                f"{child_indent}profiler_config:",
-                f'{grandchild_indent}profiler: "torch"',
-                f'{grandchild_indent}torch_profiler_dir: "{profiler_dir}"',
-                f"{grandchild_indent}torch_profiler_with_stack: true",
-            ]
-        )
-        injected_count += 1
-
-    if injected_count == 0:
-        raise ValueError(f"No engine_args block found in stage config: {stage_configs_path}")
-
-    tmp = tempfile.NamedTemporaryFile(
-        mode="w",
-        encoding="utf-8",
-        delete=False,
-        suffix=".yaml",
-        prefix=f"{stage_config_path.stem}_profile_",
-    )
-    tmp.write("\n".join(injected_lines) + "\n")
-    tmp.close()
-    return tmp.name
-
-
-def parse_args():
-    parser = FlexibleArgumentParser(
-        description="Offline split-stage VoxCPM inference with vLLM Omni (auto sync/streaming by stage config)"
-    )
-    parser.add_argument(
-        "--model",
-        type=str,
-        default=os.environ.get("VOXCPM_MODEL"),
-        help="Local VoxCPM model directory. Defaults to $VOXCPM_MODEL.",
-    )
-    parser.add_argument(
-        "--text",
-        type=str,
-        default="This is a split-stage VoxCPM synthesis example running on vLLM Omni.",
-        help="Text to synthesize. Ignored when --txt-prompts or --jsonl-prompts is used.",
-    )
-    parser.add_argument(
-        "--txt-prompts",
-        type=str,
-        default=None,
-        help="Path to a .txt file with one synthesis text per line.",
-    )
-    parser.add_argument(
-        "--jsonl-prompts",
-        type=str,
-        default=None,
-        help=(
-            "Path to a .jsonl file. Each line must contain at least {'text': ...}; "
-            "clone rows can also set ref_audio/ref_text, and ref_text must be the "
-            "real transcript of ref_audio."
-        ),
-    )
-    parser.add_argument(
-        "--ref-audio",
-        type=str,
-        default=None,
-        help=(
-            "Optional reference audio path for voice cloning. With --txt-prompts, "
-            "the same reference is applied to every line."
-        ),
-    )
-    parser.add_argument(
-        "--ref-text",
-        type=str,
-        default=None,
-        help=(
-            "Real transcript of the reference audio. Placeholder text or mismatched "
-            "text will usually produce noisy/electronic clone audio."
-        ),
-    )
-    parser.add_argument(
-        "--stage-configs-path",
-        type=str,
-        default=str(DEFAULT_STAGE_SYNC),
-        help="Stage config YAML path. Routing is selected only from this path.",
-    )
-    parser.add_argument(
-        "--cfg-value",
-        type=float,
-        default=2.0,
-        help="Classifier-free guidance value for VoxCPM.",
-    )
-    parser.add_argument(
-        "--inference-timesteps",
-        type=int,
-        default=10,
-        help="Number of inference timesteps.",
-    )
-    parser.add_argument(
-        "--min-len",
-        type=int,
-        default=2,
-        help="Minimum generated token length.",
-    )
-    parser.add_argument(
-        "--max-new-tokens",
-        type=int,
-        default=4096,
-        help="Maximum generated token length.",
-    )
-    parser.add_argument(
-        "--streaming-prefix-len",
-        type=int,
-        default=None,
-        help="VoxCPM streaming window (optional, streaming mode only).",
-    )
-    parser.add_argument(
-        "--output-dir",
-        type=str,
-        default=None,
-        help="Directory for output WAV files.",
-    )
-    parser.add_argument(
-        "--stage-init-timeout",
-        type=int,
-        default=600,
-        help="Stage initialization timeout in seconds.",
-    )
-    parser.add_argument(
-        "--log-stats",
-        dest="log_stats",
-        action="store_true",
-        help="Enable vLLM Omni stats logging.",
-    )
-    parser.add_argument(
-        "--no-log-stats",
-        dest="log_stats",
-        action="store_false",
-        help="Disable vLLM Omni stats logging.",
-    )
-    parser.set_defaults(log_stats=True)
-    parser.add_argument(
-        "--num-runs",
-        type=int,
-        default=1,
-        help="Number of full inference runs (same prompt each time). Default 1.",
-    )
-    parser.add_argument(
-        "--warmup-runs",
-        type=int,
-        default=0,
-        help=(
-            "Optional number of warmup passes before measured runs. Warmup uses only "
-            "the first prompt and does not save outputs."
-        ),
-    )
-    parser.add_argument(
-        "--enable-profiler",
-        action="store_true",
-        help=(
-            "Enable torch profiler for the configured stages. A temporary profiled "
-            "stage config is generated automatically."
-        ),
-    )
-    parser.add_argument(
-        "--profiler-dir",
-        type=str,
-        default=None,
-        help="Directory for profiler traces. Defaults to <output-dir>/profiler when profiling is enabled.",
-    )
-    parser.add_argument(
-        "--profiler-stages",
-        type=int,
-        nargs="*",
-        default=None,
-        help="Optional stage ids to profile. Defaults to all stages that have profiler_config.",
-    )
-    parser.add_argument(
-        "--profiler-wait-seconds",
-        type=float,
-        default=30.0,
-        help="Seconds to wait after stop_profile for trace files to flush.",
-    )
-    args = parser.parse_args()
-
-    if not args.model:
-        parser.error("--model is required unless $VOXCPM_MODEL is set")
-    if args.txt_prompts is not None and args.jsonl_prompts is not None:
-        parser.error("--txt-prompts and --jsonl-prompts are mutually exclusive")
-    if (args.ref_audio is None) != (args.ref_text is None):
-        parser.error("--ref-audio and --ref-text must be provided together")
-    if args.num_runs < 1:
-        parser.error("--num-runs must be >= 1")
-    if args.warmup_runs < 0:
-        parser.error("--warmup-runs must be >= 0")
-    if args.output_dir is None:
-        args.output_dir = (
-            "output_audio_streaming" if _is_streaming_stage_config(args.stage_configs_path) else "output_audio"
-        )
-    if args.enable_profiler and args.profiler_dir is None:
-        args.profiler_dir = str(Path(args.output_dir) / "profiler")
-    try:
-        args.prompt_specs = _load_prompt_specs(args)
-    except ValueError as exc:
-        parser.error(str(exc))
-
-    return args
-
-
-def _is_streaming_stage_config(stage_configs_path: str) -> bool:
-    cfg_name = Path(stage_configs_path).name.lower()
-    return "async_chunk" in cfg_name
-
-
-async def _collect_streaming_audio(
-    omni: AsyncOmni,
-    args: Any,
-    spec: PromptSpec,
-    request_id: str,
-    *,
-    phase_label: str,
-    prompt_index: int,
-    prompt_count: int,
-    print_prompt: bool = False,
-) -> tuple[torch.Tensor, int, float, float | None]:
-    prompt = _build_prompt_for_spec(args, spec, global_request_id=request_id)
-    delta_chunks: list[torch.Tensor] = []
-    sample_rate = 24000
-    chunk_i = 0
-    prev_total_samples = 0
-    t_start = time.perf_counter()
-    first_audio_elapsed: float | None = None
-
-    if print_prompt:
-        print(f"---prompt---:{prompt}")
-
-    async for stage_output in omni.generate(prompt, request_id=request_id):
-        mm = getattr(stage_output, "multimodal_output", None)
-        if not isinstance(mm, dict):
-            ro = getattr(stage_output, "request_output", None)
-            if ro is None:
-                continue
-            mm = getattr(ro, "multimodal_output", None)
-            if not isinstance(mm, dict) and getattr(ro, "outputs", None):
-                seq = ro.outputs[0]
-                mm = getattr(seq, "multimodal_output", None)
-        if not isinstance(mm, dict):
-            continue
-        sample_rate = _extract_sample_rate(mm)
-        try:
-            w = _extract_audio_tensor(mm)
-            n = int(w.numel())
-            if n == 0:
-                continue
-            finished = _extract_stream_finished(stage_output)
-            if n > prev_total_samples:
-                delta = w.reshape(-1)[prev_total_samples:]
-                prev_total_samples = n
-            elif finished and n == prev_total_samples:
-                delta = w.reshape(-1)[:0]
-            else:
-                delta = w.reshape(-1)
-                prev_total_samples += int(delta.numel())
-            if int(delta.numel()) > 0:
-                delta_chunks.append(delta)
-            if first_audio_elapsed is None and int(delta.numel()) > 0:
-                first_audio_elapsed = time.perf_counter() - t_start
-            logger.info(
-                "%s prompt=%d/%d chunk=%d delta_samples=%d buf_len=%d finished=%s",
-                phase_label,
-                prompt_index + 1,
-                prompt_count,
-                chunk_i,
-                int(delta.numel()),
-                n,
-                finished,
-            )
-            chunk_i += 1
-        except ValueError:
-            if not _extract_stream_finished(stage_output):
-                logger.debug("skip non-audio partial output chunk=%d", chunk_i)
-
-    if not delta_chunks:
-        raise RuntimeError("No audio chunks received; check stage config and logs.")
-
-    audio_cat = torch.cat([c.reshape(-1) for c in delta_chunks], dim=0)
-    elapsed = time.perf_counter() - t_start
-    return audio_cat, sample_rate, elapsed, first_audio_elapsed
-
-
-async def _abort_streaming_residual_work(
-    omni: AsyncOmni,
-    request_id: str,
-    *,
-    settle_seconds: float = 0.1,
-) -> None:
-    """Stop any late stage-0 work once the final audio has been collected."""
-    await omni.engine.abort_async([request_id])
-    if settle_seconds > 0:
-        await asyncio.sleep(settle_seconds)
-
-
-async def _run_streaming_single(
-    omni: AsyncOmni,
-    args: Any,
-    spec: PromptSpec,
-    output_dir: Path,
-    request_id: str,
-    *,
-    run_index: int,
-    num_runs: int,
-    prompt_index: int,
-    prompt_count: int,
-) -> Path:
-    audio_cat, sample_rate, elapsed, first_audio_elapsed = await _collect_streaming_audio(
-        omni,
-        args,
-        spec,
-        request_id,
-        phase_label=f"run={run_index + 1}/{num_runs}",
-        prompt_index=prompt_index,
-        prompt_count=prompt_count,
-        print_prompt=(run_index == 0 and prompt_index == 0),
-    )
-    await _abort_streaming_residual_work(omni, request_id)
-    output_path = output_dir / f"output_run{run_index + 1}_{spec.label}.wav"
-    _write_audio_tensor(output_path, audio_cat, sample_rate)
-    audio_duration_s = float(audio_cat.numel()) / float(sample_rate) if sample_rate > 0 else 0.0
-    ttfp_text = f", ttfp={first_audio_elapsed:.2f}s" if first_audio_elapsed is not None else ""
-    rtf_text = f", rtf={elapsed / audio_duration_s:.3f}" if audio_duration_s > 0 else ""
-    print(
-        f"Saved (streaming) run {run_index + 1}/{num_runs}, "
-        f"prompt {prompt_index + 1}/{prompt_count}: {output_path} ({elapsed:.2f}s{ttfp_text}{rtf_text})"
-    )
-    _emit_offline_metrics(
-        request_id=request_id,
-        elapsed_s=elapsed,
-        first_audio_elapsed=first_audio_elapsed,
-        audio_duration_s=audio_duration_s,
-    )
-    return output_path
-
-
-async def _run_streaming_warmup(args, omni: AsyncOmni) -> None:
-    if args.warmup_runs == 0:
-        return
-
-    warmup_specs = _get_warmup_specs(args.prompt_specs)
-    print(
-        f"Warmup: {args.warmup_runs} run(s) using the first prompt "
-        f"({len(warmup_specs)} prompt(s)); outputs will be discarded."
-    )
-    for warmup_index in range(args.warmup_runs):
-        t_warmup = time.perf_counter()
-        tasks = []
-        request_ids: list[str] = []
-        for prompt_index, spec in enumerate(warmup_specs):
-            request_id = f"warmup_stream_{warmup_index + 1}_{spec.label}_{uuid.uuid4().hex[:8]}"
-            request_ids.append(request_id)
-            tasks.append(
-                _collect_streaming_audio(
-                    omni,
-                    args,
-                    spec,
-                    request_id,
-                    phase_label=f"warmup={warmup_index + 1}/{args.warmup_runs}",
-                    prompt_index=prompt_index,
-                    prompt_count=len(warmup_specs),
-                )
-            )
-        results = await asyncio.gather(*tasks)
-        for request_id in request_ids:
-            await _abort_streaming_residual_work(omni, request_id)
-        total_samples = sum(int(audio.numel()) for audio, _, _, _ in results)
-        warmup_ttfps = [ttfp for _, _, _, ttfp in results if ttfp is not None]
-        ttfp_text = f", ttfp={min(warmup_ttfps):.2f}s" if warmup_ttfps else ""
-        print(
-            f"Warmup (streaming) {warmup_index + 1}/{args.warmup_runs} finished: "
-            f"{len(results)} prompt(s), {total_samples} sample(s) "
-            f"({time.perf_counter() - t_warmup:.2f}s{ttfp_text})"
-        )
-
-
-async def _run_streaming(args) -> list[Path]:
-    output_dir = Path(args.output_dir)
-    output_dir.mkdir(parents=True, exist_ok=True)
-
-    omni = AsyncOmni(
-        model=args.model,
-        stage_configs_path=args.stage_configs_path,
-        log_stats=args.log_stats,
-        stage_init_timeout=args.stage_init_timeout,
-    )
-
-    await _run_streaming_warmup(args, omni)
-    profiler_started = False
-    if args.enable_profiler:
-        profile_prefix = f"voxcpm_streaming_{int(time.time())}"
-        stages_text = args.profiler_stages if args.profiler_stages is not None else "all-configured"
-        print(f"Starting profiler (streaming): stages={stages_text}, dir={args.profiler_dir}")
-        await omni.start_profile(profile_prefix=profile_prefix, stages=args.profiler_stages)
-        profiler_started = True
-    t_total = time.perf_counter()
-    total_elapsed = 0.0
-    paths: list[Path] = []
-    prompt_specs: list[PromptSpec] = args.prompt_specs
-    try:
-        for run in range(args.num_runs):
-            for prompt_index, spec in enumerate(prompt_specs):
-                request_id = f"stream_{run + 1}_{spec.label}_{uuid.uuid4().hex[:8]}"
-                paths.append(
-                    await _run_streaming_single(
-                        omni,
-                        args,
-                        spec,
-                        output_dir,
-                        request_id,
-                        run_index=run,
-                        num_runs=args.num_runs,
-                        prompt_index=prompt_index,
-                        prompt_count=len(prompt_specs),
-                    )
-                )
-        total_elapsed = time.perf_counter() - t_total
-    finally:
-        if profiler_started:
-            print("Stopping profiler (streaming)...")
-            await omni.stop_profile(stages=args.profiler_stages)
-            if args.profiler_wait_seconds > 0:
-                print(f"Waiting {args.profiler_wait_seconds:.1f}s for profiler traces to flush...")
-                await asyncio.sleep(args.profiler_wait_seconds)
-
-    print(
-        f"All streaming runs finished: {args.num_runs} run(s), "
-        f"{len(prompt_specs)} prompt(s), {len(paths)} file(s) in {total_elapsed:.2f}s total"
-    )
-    return paths
-
-
-def _run_sync(args) -> list[Path]:
-    output_dir = Path(args.output_dir)
-
-    omni = Omni(
-        model=args.model,
-        stage_configs_path=args.stage_configs_path,
-        log_stats=args.log_stats,
-        stage_init_timeout=args.stage_init_timeout,
-    )
-
-    def _run_sync_single(
-        spec: PromptSpec,
-        *,
-        request_prefix: str,
-        save_outputs: bool,
-        run_index: int | None = None,
-    ) -> tuple[list[Path], int, float | None, float, float, str]:
-        global_request_id = f"{request_prefix}_{spec.label}"
-        prompt = _build_prompt_for_spec(args, spec, global_request_id=global_request_id)
-        if save_outputs and run_index == 0 and spec.label == "item001":
-            print(f"---prompt---:{prompt}")
-
-        saved_paths: list[Path] = []
-        output_count = 0
-        first_audio_elapsed: float | None = None
-        total_audio_duration_s = 0.0
-        metrics_request_id = global_request_id
-        t_start = time.perf_counter()
-        for stage_outputs in omni.generate(prompt):
-            request_output = stage_outputs.request_output
-            if request_output is None:
-                continue
-            request_output_id = getattr(request_output, "request_id", None)
-            if isinstance(request_output_id, str) and request_output_id:
-                metrics_request_id = request_output_id
-            for j, mm in enumerate(_iter_request_multimodal_outputs(request_output)):
-                output_count += 1
-                if first_audio_elapsed is None:
-                    try:
-                        audio_tensor = _extract_audio_tensor(mm)
-                        if int(audio_tensor.numel()) > 0:
-                            first_audio_elapsed = time.perf_counter() - t_start
-                        total_audio_duration_s += float(audio_tensor.numel()) / float(_extract_sample_rate(mm))
-                    except ValueError:
-                        pass
-                else:
-                    try:
-                        audio_tensor = _extract_audio_tensor(mm)
-                        total_audio_duration_s += float(audio_tensor.numel()) / float(_extract_sample_rate(mm))
-                    except ValueError:
-                        pass
-                if not save_outputs:
-                    continue
-                save_stem = f"run{run_index + 1}_{spec.label}" if j == 0 else f"run{run_index + 1}_{spec.label}_{j}"
-                saved_paths.append(_save_wav(mm, output_dir, save_stem))
-
-        if output_count == 0:
-            raise RuntimeError("No output from Omni.generate")
-        elapsed_s = time.perf_counter() - t_start
-        return saved_paths, output_count, first_audio_elapsed, elapsed_s, total_audio_duration_s, metrics_request_id
-
-    if args.warmup_runs:
-        warmup_specs = _get_warmup_specs(args.prompt_specs)
-        print(
-            f"Warmup: {args.warmup_runs} run(s) using the first prompt "
-            f"({len(warmup_specs)} prompt(s)); outputs will be discarded."
-        )
-        for warmup_index in range(args.warmup_runs):
-            t_warmup = time.perf_counter()
-            _, output_count, first_audio_elapsed, elapsed_s, audio_duration_s, _ = _run_sync_single(
-                warmup_specs[0],
-                request_prefix=f"warmup_sync{warmup_index + 1}",
-                save_outputs=False,
-            )
-            ttfp_text = f", ttfp={first_audio_elapsed:.2f}s" if first_audio_elapsed is not None else ""
-            rtf_text = f", rtf={elapsed_s / audio_duration_s:.3f}" if audio_duration_s > 0 else ""
-            print(
-                f"Warmup (sync) {warmup_index + 1}/{args.warmup_runs} finished: "
-                f"{output_count} output(s) ({time.perf_counter() - t_warmup:.2f}s{ttfp_text}{rtf_text})"
-            )
-
-    profiler_started = False
-    if args.enable_profiler:
-        profile_prefix = f"voxcpm_sync_{int(time.time())}"
-        stages_text = args.profiler_stages if args.profiler_stages is not None else "all-configured"
-        print(f"Starting profiler (sync): stages={stages_text}, dir={args.profiler_dir}")
-        omni.start_profile(profile_prefix=profile_prefix, stages=args.profiler_stages)
-        profiler_started = True
-
-    t_total = time.perf_counter()
-    total_elapsed = 0.0
-    saved_paths: list[Path] = []
-    prompt_specs: list[PromptSpec] = args.prompt_specs
-    try:
-        for run in range(args.num_runs):
-            t_run = time.perf_counter()
-            run_paths: list[Path] = []
-            for prompt_index, spec in enumerate(prompt_specs):
-                prompt_paths, _, first_audio_elapsed, elapsed_s, audio_duration_s, metrics_request_id = (
-                    _run_sync_single(
-                        spec,
-                        request_prefix=f"sync_run{run + 1}_{prompt_index + 1:03d}",
-                        save_outputs=True,
-                        run_index=run,
-                    )
-                )
-                run_paths.extend(prompt_paths)
-                ttfp_text = f", ttfp={first_audio_elapsed:.2f}s" if first_audio_elapsed is not None else ""
-                rtf_text = f", rtf={elapsed_s / audio_duration_s:.3f}" if audio_duration_s > 0 else ""
-                print(
-                    f"Saved (sync) run {run + 1}/{args.num_runs}, "
-                    f"prompt {prompt_index + 1}/{len(prompt_specs)}: {len(prompt_paths)} file(s){ttfp_text}{rtf_text}"
-                )
-                _emit_offline_metrics(
-                    request_id=metrics_request_id,
-                    elapsed_s=elapsed_s,
-                    first_audio_elapsed=first_audio_elapsed,
-                    audio_duration_s=audio_duration_s,
-                )
-
-            saved_paths.extend(run_paths)
-            print(
-                f"Run {run + 1}/{args.num_runs} finished: {len(run_paths)} file(s) ({time.perf_counter() - t_run:.2f}s)"
-            )
-            for path in run_paths:
-                print(f"  {path}")
-
-        total_elapsed = time.perf_counter() - t_total
-    finally:
-        if profiler_started:
-            print("Stopping profiler (sync)...")
-            omni.stop_profile(stages=args.profiler_stages)
-            if args.profiler_wait_seconds > 0:
-                print(f"Waiting {args.profiler_wait_seconds:.1f}s for profiler traces to flush...")
-                time.sleep(args.profiler_wait_seconds)
-
-    print(
-        f"All sync runs finished: {args.num_runs} run(s), "
-        f"{len(prompt_specs)} prompt(s), {len(saved_paths)} file(s) in {total_elapsed:.2f}s total"
-    )
-    return saved_paths
-
-
-def main(args) -> int:
-    logging.basicConfig(level=logging.INFO)
-    profiled_stage_config_path: str | None = None
-    original_stage_config_path = args.stage_configs_path
-    if args.enable_profiler:
-        Path(args.profiler_dir).mkdir(parents=True, exist_ok=True)
-        profiled_stage_config_path = _build_profiled_stage_config(
-            args.stage_configs_path,
-            str(Path(args.profiler_dir).resolve()),
-        )
-        args.stage_configs_path = profiled_stage_config_path
-
-    is_streaming = _is_streaming_stage_config(args.stage_configs_path)
-    voice_clone_count = _count_voice_clone_prompts(args.prompt_specs)
-    print(f"Model: {args.model}")
-    print(f"Stage config: {original_stage_config_path}")
-    print(f"Route: {'streaming' if is_streaming else 'sync'} (from stage-configs-path)")
-    print(f"Prompt count: {len(args.prompt_specs)}")
-    print("Batch mode: sequential (aligned with native VoxCPM)")
-    print(f"Warmup runs: {args.warmup_runs}")
-    print(f"Voice cloning prompts: {voice_clone_count}/{len(args.prompt_specs)}")
-    if args.enable_profiler:
-        print(f"Profiler: enabled (dir={args.profiler_dir}, stages={args.profiler_stages or 'all-configured'})")
-        print(f"Profiled stage config: {args.stage_configs_path}")
-    if voice_clone_count:
-        print("Voice cloning note: --ref-text/ref_text must match the spoken content of the reference audio.")
-    print(f"Num runs: {args.num_runs}")
-    try:
-        if is_streaming:
-            asyncio.run(_run_streaming(args))
-        else:
-            _run_sync(args)
-    finally:
-        if profiled_stage_config_path is not None and os.path.exists(profiled_stage_config_path):
-            os.unlink(profiled_stage_config_path)
-    return 0
-
-
-if __name__ == "__main__":
-    os.environ["VLLM_WORKER_MULTIPROC_METHOD"] = "spawn"
-    raise SystemExit(main(parse_args()))

docker/Dockerfile.ci

@@ -1,5 +1,5 @@
 ARG VLLM_BASE_IMAGE=vllm/vllm-openai
-ARG VLLM_BASE_TAG=v0.20.0
+ARG VLLM_BASE_TAG=v0.21.0
 FROM ${VLLM_BASE_IMAGE}:${VLLM_BASE_TAG}
 ARG APP_DIR=/workspace/vllm-omni
 WORKDIR ${APP_DIR}

docker/Dockerfile.npu.ci

@@ -0,0 +1,48 @@
+ARG VLLM_ASCEND_IMAGE=quay.io/ascend/vllm-ascend
+ARG VLLM_ASCEND_TAG=nightly-main
+FROM ${VLLM_ASCEND_IMAGE}:${VLLM_ASCEND_TAG}
+
+ARG APP_DIR=/vllm-workspace/vllm-omni
+WORKDIR ${APP_DIR}
+COPY . .
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        ffmpeg \
+        libgl1 \
+        libglib2.0-0 \
+        libgomp1 \
+        libsm6 \
+        libxext6 \
+        libxrender1 \
+        libxcb1 \
+        espeak-ng && \
+    rm -rf /var/cache/apt/* && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN source /usr/local/Ascend/ascend-toolkit/set_env.sh && \
+    source /usr/local/Ascend/nnal/atb/set_env.sh && \
+    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/Ascend/ascend-toolkit/latest/`uname -i`-linux/devlib && \
+    python3 -m pip install -U pip && \
+    python3 -m pip install -v \
+      "pytest>=7.0.0" \
+      "pytest-asyncio>=0.21.0" \
+      "pytest-cov>=4.0.0" \
+      "pytest-mock>=3.10.0" \
+      "openpyxl>=3.0.0" \
+      "psutil>=7.2.0" \
+      "soundfile>=0.13.1" \
+      "pyttsx3>=2.99" \
+      "opencv-python>=4.12.0.88" \
+      "imageio[ffmpeg]>=0.6.0" \
+      --index-url http://cache-service.nginx-pypi-cache.svc.cluster.local/pypi/simple \
+      --trusted-host cache-service.nginx-pypi-cache.svc.cluster.local \
+      --default-timeout=60 && \
+    python3 -m pip install -v -e /vllm-workspace/vllm-omni/ --no-build-isolation \
+      --index-url http://cache-service.nginx-pypi-cache.svc.cluster.local/pypi/simple \
+      --trusted-host cache-service.nginx-pypi-cache.svc.cluster.local \
+      --default-timeout=60
+
+ENV VLLM_WORKER_MULTIPROC_METHOD=spawn
+
+ENTRYPOINT []

docker/Dockerfile.npu.ci.a3

@@ -0,0 +1,48 @@
+ARG VLLM_ASCEND_IMAGE=quay.io/ascend/vllm-ascend
+ARG VLLM_ASCEND_TAG=nightly-main-a3
+FROM ${VLLM_ASCEND_IMAGE}:${VLLM_ASCEND_TAG}
+
+ARG APP_DIR=/vllm-workspace/vllm-omni
+WORKDIR ${APP_DIR}
+COPY . .
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        ffmpeg \
+        libgl1 \
+        libglib2.0-0 \
+        libgomp1 \
+        libsm6 \
+        libxext6 \
+        libxrender1 \
+        libxcb1 \
+        espeak-ng && \
+    rm -rf /var/cache/apt/* && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN source /usr/local/Ascend/ascend-toolkit/set_env.sh && \
+    source /usr/local/Ascend/nnal/atb/set_env.sh && \
+    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/Ascend/ascend-toolkit/latest/`uname -i`-linux/devlib && \
+    python3 -m pip install -U pip && \
+    python3 -m pip install -v \
+      "pytest>=7.0.0" \
+      "pytest-asyncio>=0.21.0" \
+      "pytest-cov>=4.0.0" \
+      "pytest-mock>=3.10.0" \
+      "openpyxl>=3.0.0" \
+      "psutil>=7.2.0" \
+      "soundfile>=0.13.1" \
+      "pyttsx3>=2.99" \
+      "opencv-python>=4.12.0.88" \
+      "imageio[ffmpeg]>=0.6.0" \
+      --index-url http://cache-service.nginx-pypi-cache.svc.cluster.local/pypi/simple \
+      --trusted-host cache-service.nginx-pypi-cache.svc.cluster.local \
+      --default-timeout=60 && \
+    python3 -m pip install -v -e /vllm-workspace/vllm-omni/ --no-build-isolation \
+      --index-url http://cache-service.nginx-pypi-cache.svc.cluster.local/pypi/simple \
+      --trusted-host cache-service.nginx-pypi-cache.svc.cluster.local \
+      --default-timeout=60
+
+ENV VLLM_WORKER_MULTIPROC_METHOD=spawn
+
+ENTRYPOINT []

docker/Dockerfile.rocm

@@ -1,4 +1,4 @@
-ARG BASE_IMAGE=vllm/vllm-openai-rocm:v0.20.0
+ARG BASE_IMAGE=vllm/vllm-openai-rocm:v0.21.0
 FROM ${BASE_IMAGE} AS base
 
 # Declare a variable to know if we want to use the nightly build or the stable build.

docker/Dockerfile.xpu

@@ -88,7 +88,7 @@ ENV UV_EXTRA_INDEX_URL=${PIP_EXTRA_INDEX_URL}
 ENV UV_INDEX_STRATEGY="unsafe-best-match"
 ENV UV_LINK_MODE="copy"
 
-ARG VLLM_VERSION=v0.20.0
+ARG VLLM_VERSION=v0.21.0
 RUN git clone -b ${VLLM_VERSION} https://github.com/vllm-project/vllm
 WORKDIR /workspace/vllm
 
@@ -133,6 +133,11 @@ ENTRYPOINT []
 
 FROM ${VLLM_BASE} AS vllm-omni
 
+RUN apt-get update && \
+    apt-get install -y espeak-ng ffmpeg git jq && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
 WORKDIR /workspace/vllm-omni
 COPY . .
 

docs/.nav.yml

@@ -6,10 +6,11 @@ nav:
     - getting_started/installation/*
   - Serving:
     - OpenAI-Compatible API:
-      - Diffusion Chat API: serving/diffusion_chat_api.md
+      - Chat Completions API: serving/chat_completions_api.md
       - Image Generation: serving/image_generation_api.md
       - Image Edit: serving/image_edit_api.md
       - Text to Speech: serving/speech_api.md
+      - Videos: serving/videos_api.md
       - Audio Generation: serving/audio_generate_api.md
       - Streaming Video Input: serving/video_stream_api.md
   - Examples:
@@ -76,8 +77,12 @@ nav:
     - Quantization:
       - Overview: user_guide/quantization/overview.md
       - Online Quantization: user_guide/quantization/online.md
+      - Quantized KV Cache: user_guide/quantization/quantized_kvcache.md
       - FP8 W8A8: user_guide/quantization/fp8.md
       - Int8 W8A8: user_guide/quantization/int8.md
+      - MXFP8 W8A8: user_guide/quantization/mxfp8.md
+      - MXFP4 W4A4: user_guide/quantization/mxfp4.md
+      - ModelOpt: user_guide/quantization/modelopt.md
       - GGUF: user_guide/quantization/gguf.md
       - AutoRound: user_guide/quantization/autoround.md
       - msModelSlim: user_guide/quantization/msmodelslim.md

docs/api/README.md

@@ -99,7 +99,6 @@ Configuration classes.
 - [vllm_omni.diffusion.cache.teacache.config.TeaCacheConfig][]
 - [vllm_omni.distributed.omni_connectors.utils.config.ConnectorSpec][]
 - [vllm_omni.distributed.omni_connectors.utils.config.OmniTransferConfig][]
-- [vllm_omni.model_executor.models.cosyvoice3.config.CosyVoice3Config][]
 - [vllm_omni.model_executor.models.fish_speech.configuration_fish_speech.FishSpeechConfig][]
 - [vllm_omni.model_executor.models.fish_speech.configuration_fish_speech.FishSpeechFastARConfig][]
 - [vllm_omni.model_executor.models.fish_speech.configuration_fish_speech.FishSpeechSlowARConfig][]
@@ -116,10 +115,13 @@ Configuration classes.
 - [vllm_omni.model_executor.models.qwen3_tts.tokenizer_25hz.configuration_qwen3_tts_tokenizer_v1.Qwen3TTSTokenizerV1DecoderConfig][]
 - [vllm_omni.model_executor.models.qwen3_tts.tokenizer_25hz.configuration_qwen3_tts_tokenizer_v1.Qwen3TTSTokenizerV1DecoderDiTConfig][]
 - [vllm_omni.model_executor.models.qwen3_tts.tokenizer_25hz.configuration_qwen3_tts_tokenizer_v1.Qwen3TTSTokenizerV1EncoderConfig][]
+- [vllm_omni.transformers_utils.configs.cosyvoice3.CosyVoice3Config][]
 - [vllm_omni.transformers_utils.configs.mammoth_moda2.Mammothmoda2Config][]
 - [vllm_omni.transformers_utils.configs.mammoth_moda2.Mammothmoda2Qwen2_5_VLConfig][]
 - [vllm_omni.transformers_utils.configs.mammoth_moda2.Mammothmoda2Qwen2_5_VLTextConfig][]
 - [vllm_omni.transformers_utils.configs.mammoth_moda2.Mammothmoda2Qwen2_5_VLVisionConfig][]
+- [vllm_omni.transformers_utils.configs.omnivoice.OmniVoiceConfig][]
+- [vllm_omni.transformers_utils.configs.voxcpm2.VoxCPM2Config][]
 
 ## Workers
 

docs/community/governance.md

@@ -39,11 +39,34 @@ Committers have write access and merge rights. They typically have deep expertis
 - [@linyueqian](https://github.com/linyueqian): TTS and Omni Support
 - [@lishunyang12](https://github.com/lishunyang12): Quantization and Configuration
 - [@princepride](https://github.com/princepride): Diffusion and Omni Support
-- [@SamitHuang](https://github.com/SamitHuang): RL and Diffusion
+- [@RuixiangMa](https://github.com/RuixiangMa): Diffusion models, parallel, cache, and docs
+- [@SamitHuang](https://github.com/SamitHuang): RL, Diffusion, and cache
 - [@tzhouam](https://github.com/tzhouam): Engine and New Model Support
-- [@wtomin](https://github.com/wtomin): Diffusion and Parallelism
+- [@wtomin](https://github.com/wtomin): Diffusion models, parallel, and docs
 - [@ZeldaHuang](https://github.com/ZeldaHuang): Omni Support
-- [@ZJY0516](https://github.com/ZJY0516): Diffusion and CustomOp
+- [@ZJY0516](https://github.com/ZJY0516): Diffusion attention backend, kernel fusion, and CustomOp
+- [@yuanheng-zhao](https://github.com/yuanheng-zhao): Diffusion cache, offload, and Omni Support
+
+## Diffusion Workload Division
+
+This section breaks down diffusion-related responsibilities. If you have PRs touching these areas, please ping the listed owners for review.
+
+### Runtime-related
+
+- Diffusion models: @RuixiangMa, @wtomin
+
+### Optimization
+
+- Parallel: @RuixiangMa, @wtomin
+- Attention backend: @ZJY0516
+- Cache: @yuanheng-zhao, @RuixiangMa, @SamitHuang
+- Offload: @yuanheng-zhao
+- Quantization: @lishunyang12, @david6666666
+- Kernel fusion / communication-computation: @ZJY0516
+
+### Docs & Test
+
+- Diffusion docs: @RuixiangMa, @wtomin
 
 ## Meetings
 

docs/contributing/ci/CI_5levels.md

@@ -152,6 +152,8 @@ vllm_omni/                                    tests/
 │   │                                            │   │   └── test_lora_manager.py        ✅
 │   ├── models/                                 │   ├── models/
 │   │   ├── qwen_image/                         │   │   ├── qwen_image/                 (e2e coverage)
+│   │   ├── ovis_image/                         │   │   ├── ovis_image/
+│   │   │   └── ...                             │   │   │   └── test_ovis_image.py     ✅
 │   │   ├── z_image/                            │   │   └── z_image/
 │   │   └── ...                                 │   │       └── test_zimage_tp_constraints.py  ✅
 │   └── worker/                                 │   └── worker/
@@ -232,15 +234,13 @@ vllm_omni/                                    tests/
                                                │   ├── test_qwen3_omni.py
                                                │   ├── test_qwen3_omni_expansion.py
                                                │   ├── test_mimo_audio.py
-                                               │   ├── test_image_gen_edit.py
                                                │   └── test_images_generations_lora.py
                                                └── offline_inference/                  ✅
                                                    ├── test_qwen2_5_omni.py
                                                    ├── test_qwen3_omni.py
                                                    ├── test_bagel_text2img.py
-                                                   ├── test_t2i_model.py
-                                                   ├── test_t2v_model.py
-                                                   ├── test_ovis_image.py
+                                                   ├── test_z_image.py
+                                                   ├── test_wan22.py
                                                    ├── test_zimage_tensor_parallel.py
                                                    ├── test_cache_dit.py
                                                    ├── test_teacache.py

docs/contributing/ci/test_guide.md

@@ -80,7 +80,7 @@ Our test scripts use the pytest framework. First, please use `git clone https://
 
     ```bash
     cd tests
-    pytest -s -v -m "full_model and omni and H100" --run-level=full_model
+    pytest -s -v -m "full_model and (omni or tts) and H100" --run-level=full_model
     ```
 
 === "L5 level"
@@ -91,10 +91,16 @@ Our test scripts use the pytest framework. First, please use `git clone https://
     cd tests
 
     # Stability: Qwen3-Omni
-    pytest -s -v dfx/stability/scripts/test_stability_qwen3_omni.py
+    pytest -s -v dfx/stability/scripts/test_stability_qwen3_omni.py -m slow
 
     # Stability: Wan2.2 (v1/videos diffusion benchmark loop)
-    pytest -s -v dfx/stability/scripts/test_stability_wan22.py
+    pytest -s -v dfx/stability/scripts/test_stability_wan22.py -m slow
+
+    # Reliability: Qwen3-Omni
+    pytest -s -v dfx/reliability/test_reliability_qwen3_omni.py -m slow
+
+    # Reliability: Wan2.2
+    pytest -s -v dfx/reliability/test_reliability_wan22.py -m slow
 
     ```
 

docs/contributing/ci/tests_markers.md

@@ -11,7 +11,8 @@ Defined in `pyproject.toml`:
 | `advanced_model`   | L3 tests (run on each merge to main)                 |
 | `full_model`       | L4 tests (run nightly) |
 | `diffusion`        | Diffusion model tests                                     |
-| `omni`             | Omni model tests                                          |
+| `omni`             | Omni multimodal model tests |
+| `tts`              | TTS model tests     |
 | `cache`            | Cache backend tests                                       |
 | `parallel`         | Parallelism/distributed tests                             |
 | `cpu`              | Tests that run on CPU                                     |

docs/contributing/ci/tests_style.md

@@ -54,6 +54,8 @@ vllm_omni/                                    tests/
 │   │                                            │   │   └── test_lora_manager.py        ✅
 │   ├── models/                                 │   ├── models/
 │   │   ├── qwen_image/                         │   │   ├── qwen_image/                 (e2e coverage)
+│   │   ├── ovis_image/                         │   │   ├── ovis_image/
+│   │   │   └── ...                             │   │   │   └── test_ovis_image.py     ✅
 │   │   ├── z_image/                            │   │   └── z_image/
 │   │   └── ...                                 │   │       └── test_zimage_tp_constraints.py  ✅
 │   └── worker/                                 │   └── worker/
@@ -134,15 +136,13 @@ vllm_omni/                                    tests/
                                                │   ├── test_qwen3_omni.py
                                                │   ├── test_qwen3_omni_expansion.py
                                                │   ├── test_mimo_audio.py
-                                               │   ├── test_image_gen_edit.py
                                                │   └── test_images_generations_lora.py
                                                └── offline_inference/                  ✅
                                                    ├── test_qwen2_5_omni.py
                                                    ├── test_qwen3_omni.py
                                                    ├── test_bagel_text2img.py
-                                                   ├── test_t2i_model.py
-                                                   ├── test_t2v_model.py
-                                                   ├── test_ovis_image.py
+                                                   ├── test_z_image.py
+                                                   ├── test_wan22.py
                                                    ├── test_zimage_tensor_parallel.py
                                                    ├── test_cache_dit.py
                                                    ├── test_teacache.py
@@ -213,7 +213,6 @@ E2E Online tests for Qwen3-Omni model with mix input and audio+text output.
 import os
 
 os.environ["VLLM_WORKER_MULTIPROC_METHOD"] = "spawn"
-os.environ["VLLM_TEST_CLEAN_GPU_MEMORY"] = "0"
 
 import threading
 from pathlib import Path

docs/contributing/model/adding_diffusion_model.md

@@ -115,17 +115,20 @@ class YourAttentionBlock(nn.Module):
 from vllm_omni.diffusion.attention.layer import Attention
 from vllm_omni.diffusion.attention.backends.abstract import AttentionMetadata
 
-class YourAttentionBlock(nn.Module):
+class YourSelfAttentionBlock(nn.Module):
     def __init__(self, ...):
         super().__init__()
 
-        # Initialize vLLM-Omni's Attention layer
+        # Initialize vLLM-Omni's Attention layer.
+        # `role` lets users target this site with --diffusion-attention-config
+        # (e.g. --diffusion-attention-config.per_role.self.backend SAGE_ATTN).
         self.attn = Attention(
             num_heads=self.num_heads,
             head_size=self.head_dim,
             softmax_scale=1.0 / (self.head_dim ** 0.5),
             causal=False,  # Diffusion models typically use bidirectional attention
             num_kv_heads=self.num_kv_heads,
+            role="self",
         )
 
     def forward(self, hidden_states, encoder_hidden_states=None, attention_mask=None, ...):
@@ -133,7 +136,6 @@ class YourAttentionBlock(nn.Module):
         # Create attention metadata
         attn_metadata = AttentionMetadata(attn_mask=attention_mask)
         hidden_states = self.attn(query, key, value, attn_metadata=attn_metadata)
-
 ```
 
 **Key Points:**
@@ -141,8 +143,35 @@ class YourAttentionBlock(nn.Module):
 - **Attention layer initialization:** Done in `__init__`, not per-forward
 - **Tensor shapes:** vLLM-Omni `Attention` expects QKV to have `[B, seq, num_heads, head_dim]` shape
 - **AttentionMetadata:** Wraps attention mask and other metadata
+- **Role:** Tag every `Attention` site with a `role` string so users can configure backends per role (see below)
 
-**Attention backends:** vLLM-Omni automatically selects the attention backend given the environmental variable `DIFFUSION_ATTENTION_BACKEND`. The default attention backend is `FLASH_ATTN` for diffusion models.
+**Declaring attention roles**
+
+The `role` argument is a free-form string that identifies this attention site. Users can match it from `--diffusion-attention-config.per_role.<role>.*` to swap backends without touching model code. Two conventions cover the common cases:
+
+| Convention | When to use | Example |
+|---|---|---|
+| `"self"` | Q/K/V come from the same hidden state | DiT self-attention block |
+| `"cross"` | K/V come from a separate `encoder_hidden_states` | Text-conditioned cross-attention |
+
+For multi-modal or unusual sites, use a dot-namespaced role and pair it with `role_category` so it can fall back to the generic config when nothing model-specific is set:
+
+```python
+# A model-specific cross-attention site that user config can target
+# either as 'mymodel.audio_to_video' (exact) or as 'cross' (category fallback).
+self.audio_to_video_attn = Attention(
+    num_heads=self.num_heads,
+    head_size=self.head_dim,
+    softmax_scale=1.0 / (self.head_dim ** 0.5),
+    causal=False,
+    role="mymodel.audio_to_video",
+    role_category="cross",
+)
+```
+
+For cross-attention sites whose K/V are replicated across ranks (e.g. text encoder output), pass `skip_sequence_parallel=True` to opt this layer out of sequence-parallel sharding.
+
+**Attention backends:** When the user does not configure a backend, vLLM-Omni asks the current platform for its default (typically `FLASH_ATTN` on CUDA when available). Users override the default via `--diffusion-attention-backend`, the `DIFFUSION_ATTENTION_BACKEND` env var, or finer-grained `--diffusion-attention-config.per_role.*` flags. See [Diffusion Attention Backends](../../user_guide/diffusion/attention_backends.md) for the full configuration surface.
 
 #### 1.3: Replace Imports and Utilities
 

docs/design/feature/diffusion_continuous_batching.md

@@ -83,7 +83,10 @@ There are two important details:
 
 Today that compatibility rule is still shape-sensitive. `height`, `width`,
 `num_frames`, and CFG-related fields remain part of the key, so different
-resolutions or incompatible guidance settings do **not** co-batch yet.
+resolutions or incompatible guidance settings do **not** co-batch yet. The
+key also covers LoRA identity (`lora_int_id`, `lora_scale`), so requests
+targeting different adapters or scales run in separate batches and the
+worker can activate exactly one adapter per step.
 
 The current batching unit is one `OmniDiffusionRequest`. Requests with
 multiple prompts do not participate in batching today.

docs/design/feature/disaggregated_inference.md

@@ -9,6 +9,7 @@ Backend-specific setup lives in separate docs:
 - [MooncakeStoreConnector](omni_connectors/mooncake_store_connector.md)
 - [MooncakeTransferEngineConnector](omni_connectors/mooncake_transfer_engine_connector.md)
 - [YuanrongConnector](omni_connectors/yuanrong_connector.md)
+- [YuanrongTransferEngineConnector](omni_connectors/yuanrong_transfer_engine_connector.md)
 
 ## Overview
 
@@ -23,6 +24,7 @@ Current connectors operate in D2H2D (device to host to device) mode.
 | Multi node (Mooncake Store) | MooncakeStoreConnector | TCP-based, requires Mooncake Master + metadata server. |
 | Multi node (Mooncake RDMA) | MooncakeTransferEngineConnector | RDMA/TCP direct transfer with managed memory pool. Fastest. |
 | Multi node (Yuanrong) | YuanrongConnector | Requires Yuanrong Datasystem + etcd. |
+| Ascend NPU P2P (Yuanrong TE) | YuanrongTransferEngineConnector | Uses Yuanrong TransferEngine directly. Configure NPU device IPv4 and `memory_pool_device: "npu"`. |
 
 ## Core API
 

docs/design/feature/omni_connectors/yuanrong_transfer_engine_connector.md

@@ -0,0 +1,211 @@
+# YuanrongTransferEngineConnector
+
+## When to Use
+
+Use `YuanrongTransferEngineConnector` for high-performance peer-to-peer KV cache
+transfer on Ascend NPU. It is different from `YuanrongConnector`:
+
+- `YuanrongConnector` uses Yuanrong Datasystem as a distributed KV store and
+  requires Datasystem workers plus etcd.
+- `YuanrongTransferEngineConnector` uses Yuanrong TransferEngine directly. It
+  registers local memory in each stage worker and lets the receiver pull data
+  from the sender with TransferEngine.
+
+The implementation currently lives under
+`vllm_omni/platforms/npu/omni_connectors/` because the supported backend is
+Ascend NPU only. The connector is still registered with the generic
+OmniConnector factory under the name `YuanrongTransferEngineConnector`.
+
+For Ascend P2P transfer, the connector should use NPU memory as its transfer
+pool. The Mooncake-style CPU pool is not supported for this connector.
+
+## Prerequisites
+
+Install Yuanrong Datasystem/TransferEngine Python bindings in the runtime
+environment. The packaged install is:
+
+```bash
+pip install openyuanrong-datasystem
+```
+
+To build from source, follow the upstream project instructions:
+
+- Source repository: [openeuler/yuanrong-datasystem](https://atomgit.com/openeuler/yuanrong-datasystem)
+- Installation guide: [Yuanrong Datasystem Linux installation](https://pages.openeuler.openatom.cn/openyuanrong-datasystem/docs/zh-cn/latest/installation/installation_linux.html)
+
+The Ascend driver, CANN runtime, HCCL/HCCP, and NPU device network must also be
+configured on every machine participating in the transfer.
+
+## Check NPU Device IPv4
+
+Yuanrong TransferEngine with `protocol: "ascend"` uses the NPU device network,
+not only the host management IP. Each participating NPU must have an IPv4 HCCN
+device IP.
+
+Check the device IP, link, and health state:
+
+```bash
+for i in {0..7}; do
+  echo "===== NPU $i ====="
+  hccn_tool -i "$i" -ip -g
+  hccn_tool -i "$i" -link -g
+  hccn_tool -i "$i" -net_health -g
+done
+```
+
+Expected output for each NPU should include an IPv4 address and healthy link:
+
+```text
+ipaddr:10.86.1.80
+netmask:255.255.255.0
+link status: UP
+net health status: Success
+```
+
+If the output says `Get ipconf failed, because no ip was preset there!`, the NPU
+device IP is not configured and Ascend P2P will fail. If the address is IPv6,
+configure IPv4 for this connector path or validate that the underlying Yuanrong
+TransferEngine build supports the IPv6 HCCN path before using it.
+
+## Check Device-to-Device Connectivity
+
+After collecting the target-stage NPU IPv4 addresses, ping them from each
+source-stage NPU:
+
+```bash
+# Example: AR uses NPU 0..3 and DiT uses NPU 4..7.
+# Replace the destination IPs with the values reported by hccn_tool -i 4..7 -ip -g.
+for src in 0 1 2 3; do
+  for dst_ip in 10.86.1.78 10.86.1.79 10.86.1.80 10.86.1.81; do
+    echo "===== NPU $src -> $dst_ip ====="
+    hccn_tool -i "$src" -ping -g address "$dst_ip" || true
+  done
+done
+```
+
+The expected result is `0.00% packet loss` for every required source/target pair.
+This verifies basic HCCN IPv4 connectivity. TransferEngine can still fail later
+if RDMA/QP/HCCL setup is broken, but failed ping means the device network must be
+fixed first.
+
+## YAML Configuration
+
+For Ascend P2P, configure the connector with `protocol: "ascend"` and an NPU
+memory pool:
+
+```yaml
+runtime:
+  enabled: true
+  defaults:
+    window_size: -1
+    max_inflight: 1
+  connectors:
+    yuanrong_te_connector:
+      name: YuanrongTransferEngineConnector
+      extra:
+        host: "auto"
+        zmq_port: 50051
+        rpc_port: "auto"
+        protocol: "ascend"
+        device_name: "auto"
+        memory_pool_size: 1073741824
+        memory_pool_device: "npu"
+  edges:
+    - from: 0
+      to: 1
+      window_size: -1
+```
+
+Important fields:
+
+| Parameter | Recommended Value | Notes |
+|---|---|---|
+| `host` | `"auto"` | Advertises a routable local host IP for ZMQ metadata exchange. |
+| `zmq_port` | `50051` | Base ZMQ port. The runtime applies stage/rank offsets. |
+| `rpc_port` | `"auto"` | Lets TransferEngine choose an available RPC port. |
+| `protocol` | `"ascend"` | Uses the Ascend TransferEngine backend. |
+| `device_name` | `"auto"` | Each TP worker resolves to its local logical NPU, for example `npu:0`, `npu:1`, etc. |
+| `memory_pool_device` | `"npu"` | Required for the Ascend fast path. This registers NPU memory with TransferEngine. |
+| `memory_pool_size` | `1073741824` | 1 GiB per worker is a practical starting point for KV-cache transfer validation. Increase if the transfer pool is exhausted. |
+
+`memory_pool_device: "cpu"` is rejected for
+`YuanrongTransferEngineConnector` with `protocol: "ascend"`. CPU pool registration
+can lead to Ascend P2P failures such as HCCL RA init errors, QP timeouts, or
+FFTS/SDMA runtime errors. `memory_pool_device: "cpu"` is common for
+`MooncakeTransferEngineConnector`, but Yuanrong TE on Ascend only supports
+`"npu"`.
+
+## 4-Card AR-to-DiT TP Example
+
+For AR 4-way TP sending KV cache to DiT 4-way TP, set the stage TP topology in
+both stage `omni_kv_config` blocks:
+
+```yaml
+stage_args:
+  - stage_id: 0
+    runtime:
+      devices: "0,1,2,3"
+    engine_args:
+      tensor_parallel_size: 4
+      omni_kv_config:
+        need_send_cache: true
+        rank_mapping:
+          from_tp: 4
+          to_tp: 4
+    output_connectors:
+      to_stage_1: yuanrong_te_connector
+
+  - stage_id: 1
+    runtime:
+      devices: "4,5,6,7"
+    engine_args:
+      parallel_config:
+        tensor_parallel_size: 4
+      omni_kv_config:
+        need_recv_cache: true
+        rank_mapping:
+          from_tp: 4
+          to_tp: 4
+    input_connectors:
+      from_stage_0: yuanrong_te_connector
+```
+
+In this topology each DiT rank receives the corresponding AR rank shard:
+
+```text
+DiT rank 0 <- AR rank 0
+DiT rank 1 <- AR rank 1
+DiT rank 2 <- AR rank 2
+DiT rank 3 <- AR rank 3
+```
+
+## Validate a Successful Run
+
+Search the inference log for Yuanrong TE receive-side messages:
+
+```bash
+grep -E "\[YR GET\]|Successfully received KV cache|transfer_engine get failed" inference.log
+```
+
+A successful Ascend fast-path transfer contains lines like:
+
+```text
+[YR GET] ... fast_path, zero-copy
+Successfully received KV cache ... across 1 key(s)
+Applied CFG KV caches
+[KV Reuse] ...
+```
+
+Sender-side `KV transfer OK` only means that the sender registered the payload
+and metadata. The actual P2P data transfer happens on the receiver side during
+`[YR GET]`.
+
+## Troubleshooting
+
+| Symptom | Likely Cause | Action |
+|---|---|---|
+| `IPv4 device IP not found` | NPU HCCN IPv4 is missing. | Run `hccn_tool -i <id> -ip -g` and configure IPv4 for every participating NPU. |
+| `P2PCommInitRootInfo failed`, `ra init failed`, `RA_QP_STATUS_TIMEOUT` | Ascend P2P/RDMA/QP setup failed. | First verify device IPv4, link health, and device-to-device ping. Then test a minimal Yuanrong TE pair outside vLLM. |
+| `fftsplus sdma error`, `context is abort` | Runtime SDMA/FFTS failure, often after an invalid or failed P2P transfer. | Use `memory_pool_device: "npu"` for Ascend TE, reduce `memory_pool_size` if OOM occurs, and isolate the failing NPU pair with a Yuanrong TE demo. |
+| Sender logs `KV transfer OK` but receiver never logs `[YR GET]` | Sender `put()` succeeded, receiver P2P read failed or timed out. | Check receiver logs and search for `transfer_engine get failed`. |
+| Pool allocation fails or OOM | Transfer pool is too small or too large for available NPU memory. | Start with 1 GiB (`1073741824`), reduce to 512 MiB for validation, or increase for larger KV payloads. |

docs/design/feature/pipeline_parallel.md

@@ -0,0 +1,356 @@
+# Pipeline Parallel
+
+This section describes how to add Pipeline Parallelism (PP) to a diffusion pipeline. We use the Wan2.2 text-to-video and
+image-to-video pipelines as the reference implementations.
+
+## Implementation Checklist
+
+Adding Pipeline Parallel support requires:
+
+1. ✅ **Inherit the mixin** - add `PipelineParallelMixin` before `CFGParallelMixin` in the pipeline class
+2. ✅ **Make stage forward resumable** - support `intermediate_tensors` in the transformer forward path
+3. ✅ **Return the right object type** - `IntermediateTensors` on non-last PP ranks, final model output on the last rank
+4. ✅ **Use the standard denoising loop** - call `predict_noise_maybe_with_cfg()` and `scheduler_step_maybe_with_cfg()`
+5. ✅ **Test parity** - compare PP results against the single-GPU baseline
+
+---
+
+## Table of Contents
+
+- [Overview](#overview)
+- [Step-by-Step Implementation](#step-by-step-implementation)
+- [Testing](#testing)
+- [Troubleshooting](#troubleshooting)
+- [Reference Implementations](#reference-implementations)
+
+---
+
+## Overview
+
+### What is Pipeline Parallelism?
+
+Pipeline Parallelism splits the denoising transformer into multiple sequential stages and places each stage on a
+different rank. Instead of every rank holding the full DiT, each PP rank owns only a slice of the layers.
+
+For each denoising step:
+
+1. Rank 0 starts the forward pass using the current latents.
+2. Each intermediate rank receives hidden states from the previous rank, runs its local layer slice, and forwards the
+   intermediate tensors downstream.
+3. The last PP rank produces the final noise prediction.
+4. The last PP rank applies the scheduler step and sends the updated latents back to rank 0 for the next timestep.
+
+This reduces per-rank model memory and enables larger diffusion transformers to run across multiple GPUs. It can also be
+combined with CFG-Parallel, where each PP pipeline carries one CFG branch.
+
+### Architecture
+
+vLLM-Omni provides `PipelineParallelMixin` to encapsulate the PP communication pattern for diffusion pipelines.
+
+| Method                            | Purpose                       | Automatic Behavior                                                              |
+|-----------------------------------|-------------------------------|---------------------------------------------------------------------------------|
+| `diffuse()`                       | Denoising loop boundary       | Wrapped by `PipelineParallelMixin` to flush pending async PP sends on exit      |
+| `predict_noise_maybe_with_cfg()`  | Predict noise with PP support | Runs partial forwards on non-last PP ranks, combines with CFG logic when needed |
+| `scheduler_step_maybe_with_cfg()` | Step scheduler with PP sync   | Runs scheduler on the last PP rank, returns updated latents to rank 0           |
+| `_sync_pp_send()`                 | Flush pending async sends     | Waits for outstanding `isend` handles before later collectives or decode        |
+
+`PipelineParallelMixin` is intentionally a pipeline-level abstraction. Your model-specific `predict_noise()` still
+defines how a local stage executes.
+
+### How It Works
+
+`predict_noise_maybe_with_cfg()` automatically switches between these modes:
+
+- **PP disabled** (`pipeline_parallel_size == 1`):
+    - Falls back to `CFGParallelMixin.predict_noise_maybe_with_cfg()`
+- **PP only** (`pipeline_parallel_size > 1`, `cfg_parallel_size == 1`):
+    - Rank 0 starts with the input latents
+    - Middle ranks receive `intermediate_tensors`, run their local layer range, and asynchronously send downstream
+    - The last rank returns the final noise prediction
+    - When CFG is enabled in this mode (sequential CFG), both the positive and negative branches run through the same
+      PP pipeline, doubling the communication volume per denoising step. Prefer PP + CFG-Parallel when
+      `cfg_parallel_size > 1` is available to avoid this overhead.
+- **PP + CFG-Parallel** (`pipeline_parallel_size > 1`, `cfg_parallel_size > 1`):
+    - Each PP pipeline carries one CFG branch
+    - The last PP rank all-gathers across the CFG group
+    - CFG combination happens on every last PP rank in the CFG group, matching the non-PP CFG-parallel behavior
+
+`scheduler_step_maybe_with_cfg()` keeps the denoising loop consistent:
+
+- **PP disabled**:
+    - Falls back to `scheduler_step_maybe_with_cfg()`
+- **PP enabled**:
+    - Only the last PP rank has `noise_pred` and runs the scheduler step
+    - The resulting latents are sent back to rank 0
+    - Rank 0 receives an `AsyncLatents` wrapper that resolves only when the tensor is next consumed
+
+This asynchronous design avoids unnecessary blocking between denoising steps.
+
+When a pipeline class is defined, `PipelineParallelMixin` wraps its `diffuse()` method and calls `_sync_pp_send()` in a
+`finally` block after `diffuse()` returns or raises. This keeps model code free of explicit PP cleanup while still
+ensuring that the final non-blocking PP send completes before decode or later collectives.
+
+---
+
+## Step-by-Step Implementation
+
+### Step 1: Inherit `PipelineParallelMixin` and `CFGParallelMixin`
+
+`PipelineParallelMixin` **requires** `CFGParallelMixin` and must appear before it in the class MRO. This is enforced at
+class definition time via `__init_subclass__`: defining a pipeline that inherits `PipelineParallelMixin` without
+`CFGParallelMixin`, or after `CFGParallelMixin`, raises a `TypeError` immediately on import.
+
+`PipelineParallelMixin` delegates noise prediction, CFG combination, and scheduler stepping to `CFGParallelMixin`, which
+supplies `predict_noise()`, `predict_noise_maybe_with_cfg()`, `scheduler_step_maybe_with_cfg()`, and
+`combine_cfg_noise()`.
+
+**Example:**
+
+```python
+from vllm_omni.diffusion.distributed.cfg_parallel import CFGParallelMixin
+from vllm_omni.diffusion.distributed.pipeline_parallel import PipelineParallelMixin
+import torch.nn as nn
+
+
+class YourPipeline(nn.Module, PipelineParallelMixin, CFGParallelMixin):
+    ...
+```
+
+The order matters: `PipelineParallelMixin` must be listed before `CFGParallelMixin` so calls to
+`predict_noise_maybe_with_cfg()` and `scheduler_step_maybe_with_cfg()` resolve to the PP-aware wrappers, while their
+`super()` calls delegate to the CFG implementation when PP is disabled or after the last PP stage.
+
+### Step 2: Make model forward and `predict_noise()` PP-aware
+
+The PP mixin injects `intermediate_tensors` into the normal `predict_noise()` call. Your model forward path must support
+two inputs:
+
+- Normal input from rank 0, typically passed as `hidden_states` or `x`
+- `intermediate_tensors` from upstream PP ranks
+
+The standard model forward pattern is:
+
+1. If `intermediate_tensors` is present, read the local hidden state from it.
+2. Run only this rank's layer slice.
+3. Return `IntermediateTensors(...)` on non-last PP ranks.
+4. Return the final model output on the last PP rank. `CFGParallelMixin.predict_noise()` already follows this contract
+   for common pipelines.
+
+**Minimal example:**
+
+```python
+from vllm.sequence import IntermediateTensors
+from vllm_omni.diffusion.distributed.parallel_state import get_pp_group
+
+
+def forward(self, hidden_states=None, intermediate_tensors=None, **kwargs):
+    if intermediate_tensors is not None:
+        hidden_states = intermediate_tensors["hidden_states"]
+
+    for i in range(self.start_layer, self.end_layer):
+        hidden_states = self.layers[i](hidden_states)
+
+    pp_group = get_pp_group()
+    if not pp_group.is_last_rank:
+        return IntermediateTensors({"hidden_states": hidden_states})
+    return (hidden_states,)
+```
+
+### Step 3: Partition the transformer layers
+
+The local module on each PP rank must expose only that rank's layer slice. In the reference tests and vLLM model
+implementations, this is typically done with vLLM utilities such as `make_layers(...)`, which fill missing ranges with
+`PPMissingLayer`. Besides partitioning the layers themselves, model authors should also wire
+`make_empty_intermediate_tensors_factory(...)` for intermediate tensor allocation and `is_pp_missing_parameter(...)` for
+PP-aware weight loading.
+
+To prepare a transformer for PP, implement the following pieces in order.
+
+#### 3.1 Split the transformer layers across PP ranks
+
+Each PP rank should own only its local layer range, typically exposed as `[start_layer, end_layer)`. In practice this is
+usually done with `make_layers(...)`, which constructs local layers and fills missing ranges with `PPMissingLayer`.
+
+The goal is:
+
+- every PP rank knows its `[start_layer, end_layer)` range
+- non-local layers do not execute on this rank
+- the forward can resume from incoming `intermediate_tensors`
+
+By default, layers are distributed evenly across PP ranks using `get_pp_indices()`. When the number of layers is not
+divisible by the PP size, remaining layers are assigned to middle partitions to balance compute and memory. You can
+override this with the `VLLM_PP_LAYER_PARTITION` environment variable to specify an exact per-rank layer count:
+
+```bash
+# Example: 40 layers across 4 PP ranks, assigning 8 / 12 / 12 / 8 layers
+export VLLM_PP_LAYER_PARTITION=8,12,12,8
+```
+
+The value must be a comma-separated list of integers whose length equals `pipeline_parallel_size` and whose sum equals
+the total number of transformer layers.
+
+#### 3.2 Expose `make_empty_intermediate_tensors`
+
+Your transformer module should expose `self.make_empty_intermediate_tensors`, typically created with
+`make_empty_intermediate_tensors_factory(...)`.
+
+This is important because PP ranks need a consistent way to allocate placeholder `IntermediateTensors` with the expected
+keys and hidden dimension.
+
+**Example:**
+
+```python
+from vllm.model_executor.models.utils import make_empty_intermediate_tensors_factory
+
+self.make_empty_intermediate_tensors = make_empty_intermediate_tensors_factory(
+    ["hidden_states"],
+    inner_dim,
+)
+```
+
+For Wan2.2, the intermediate payload between PP stages is the token sequence stored under `"hidden_states"`, so the
+factory is created with that key and the transformer hidden size.
+
+#### 3.3 Return `IntermediateTensors` on non-last PP ranks
+
+Your model `forward()` or custom `predict_noise()` implementation should consume `intermediate_tensors` on non-first
+ranks and return `IntermediateTensors(...)` on non-last ranks.
+
+This lets each PP stage resume from the upstream hidden states and pass the local result to the next stage.
+
+#### 3.4 Skip non-local weights during `load_weights()`
+
+When a model is PP-partitioned, many parameters in the checkpoint belong to layers that do not exist on the current
+rank. `load_weights()` must therefore skip parameters for missing PP stages using `is_pp_missing_parameter(...)`.
+
+If this is not done, weight loading will either fail or incorrectly try to load tensors into `PPMissingLayer`
+placeholders.
+
+The Wan2.2 transformer is the best reference here: it uses `is_pp_missing_parameter(...)` before loading both remapped
+and fused parameters.
+
+If your model has multiple transformer variants, PP still works as long as each selected transformer obeys the same
+contract.
+
+### Step 4: Use the standard denoising contract
+
+vLLM-Omni diffusion pipelines already route denoising through `diffuse()`, `predict_noise_maybe_with_cfg()`, and
+`scheduler_step_maybe_with_cfg()`. `PipelineParallelMixin` overrides those standard helpers when
+`pipeline_parallel_size > 1`, so model integrations should not add separate PP-specific helper names or manual post-loop
+synchronization.
+
+In PP mode:
+
+- Non-last PP ranks return `None` from `predict_noise_maybe_with_cfg()` after sending `IntermediateTensors` downstream.
+- The last PP rank returns the final prediction, and with CFG-Parallel every last PP rank in the CFG group receives the
+  combined result.
+- Rank 0 receives `AsyncLatents` from `scheduler_step_maybe_with_cfg()`, which resolves only when the latents are
+  consumed.
+- Pending non-blocking sends are flushed automatically when `diffuse()` exits.
+
+---
+
+## Testing
+
+Use an offline inference script with `pipeline_parallel_size > 1`.
+
+```bash
+python examples/offline_inference/text_to_video/text_to_video.py \
+--model=Wan-AI/Wan2.2-TI2V-5B-Diffusers \
+--width=1280 \
+--height=704 \
+--guidance-scale=5.0 \
+--prompt="Two anthropomorphic cats in comfy boxing gear and bright gloves fight intensely on a spotlighted stage" \
+--output=t2v_5B_pp2.mp4 \
+--pipeline-parallel-size=2
+```
+
+For PP + CFG-Parallel together:
+
+```bash
+python examples/offline_inference/text_to_video/text_to_video.py \
+--model=Wan-AI/Wan2.2-TI2V-5B-Diffusers \
+--width=1280 \
+--height=704 \
+--guidance-scale=5.0 \
+--prompt="Two anthropomorphic cats in comfy boxing gear and bright gloves fight intensely on a spotlighted stage" \
+--output=t2v_5B_pp2_cfg2.mp4 \
+--pipeline-parallel-size=2 \
+--cfg-parallel-size=2
+```
+
+**Verify:**
+
+1. The run completes without hangs at the PP stage boundary
+2. Output quality matches the non-PP baseline within normal numerical variance
+3. Peak memory per GPU drops compared with the single-rank model
+4. There are no outstanding communication errors before decode
+
+---
+
+## Troubleshooting
+
+### Issue: `TypeError` on import — `CFGParallelMixin` missing
+
+**Symptoms:** Importing a pipeline that inherits `PipelineParallelMixin` raises:
+
+```
+TypeError: YourPipeline inherits PipelineParallelMixin but not CFGParallelMixin.
+```
+
+or:
+
+```
+TypeError: YourPipeline must inherit PipelineParallelMixin before CFGParallelMixin ...
+```
+
+**Cause:** `PipelineParallelMixin` enforces via `__init_subclass__` that the subclass also inherits `CFGParallelMixin`
+and lists `PipelineParallelMixin` first in the MRO.
+
+**Solution:** Add `CFGParallelMixin` to the pipeline's base classes after `PipelineParallelMixin`:
+
+```python
+from vllm_omni.diffusion.distributed.cfg_parallel import CFGParallelMixin
+from vllm_omni.diffusion.distributed.pipeline_parallel import PipelineParallelMixin
+
+
+class YourPipeline(nn.Module, PipelineParallelMixin, CFGParallelMixin):
+    ...
+```
+
+### Issue: Non-last PP ranks crash when calling `predict_noise`
+
+**Symptoms:** Shape or missing-input errors on ranks other than the first or last PP rank.
+
+**Cause:** The model forward path assumes direct input tensors and ignores `intermediate_tensors`.
+
+**Solution:** Update the transformer `forward()` or custom `predict_noise()` path to load hidden states from
+`intermediate_tensors` when present.
+
+### Issue: PP outputs differ from single-GPU baseline
+
+**Symptoms:** The PP run finishes but produces numerically inconsistent outputs.
+
+**Causes & Solutions:**
+
+- **Local layer partitioning is wrong**
+    - Verify each rank runs only its `[start_layer, end_layer)` slice
+- **Non-last ranks return a plain tensor instead of `IntermediateTensors`**
+    - Return `IntermediateTensors({...})` until the last PP stage
+- **CFG branch wiring is incorrect**
+    - When CFG is enabled, confirm positive and negative kwargs are passed exactly as in the non-PP path
+
+---
+
+## Reference Implementations
+
+Complete examples in the codebase:
+
+| Component               | Path                                                       | Notes                                                                                                                   |
+|-------------------------|------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------|
+| `PipelineParallelMixin` | `vllm_omni/diffusion/distributed/pipeline_parallel.py`     | Core PP communication and scheduler helpers                                                                             |
+| `CFGParallelMixin`      | `vllm_omni/diffusion/distributed/cfg_parallel.py`          | Default `predict_noise()` tuple normalization and CFG helper fallback                                                   |
+| Wan2.2 transformer      | `vllm_omni/diffusion/models/wan2_2/wan2_2_transformer.py`  | Reference for layer partitioning, `IntermediateTensors`, `make_empty_intermediate_tensors`, and PP-aware weight loading |
+| Wan2.2 T2V pipeline     | `vllm_omni/diffusion/models/wan2_2/pipeline_wan2_2.py`     | Reference PP + CFG integration for text-to-video                                                                        |
+| Wan2.2 I2V pipeline     | `vllm_omni/diffusion/models/wan2_2/pipeline_wan2_2_i2v.py` | Reference PP + CFG integration for image-to-video                                                                       |
+| PP tests                | `tests/diffusion/distributed/test_pipeline_parallel.py`    | Baseline parity and async communication tests                                                                           |

docs/design/module/dit_module.md

@@ -455,7 +455,7 @@ To learn more about the diffusion pipeline and how to add a new diffusion pipeli
 
 #### Architecture
 
-The attention system uses a **backend selector pattern** that automatically chooses the optimal attention implementation based on hardware and model configuration.
+The attention system uses a **role-aware backend selector pattern**. Each `Attention` site declares a semantic `role` (`"self"`, `"cross"`, or a model-specific string). The selector consults the user's `AttentionConfig` to pick a backend per role and falls back to the platform default when nothing is configured.
 
 #### Backend Selection
 
@@ -463,92 +463,90 @@ The attention system uses a **backend selector pattern** that automatically choo
 
 ```python
 class Attention(nn.Module):
-    def __init__(self, num_heads, head_size, causal, softmax_scale, ...):
-        # Auto-select backend
-        self.attn_backend = get_attn_backend(-1)
-        self.attn_impl_cls = self.attn_backend.get_impl_cls()
-        self.attention = self.attn_impl_cls(...)
+    def __init__(self, num_heads, head_size, causal, softmax_scale, *,
+                 role="self", role_category=None, ...):
+        # Resolve backend for this role from the active OmniDiffusionConfig
+        config = get_current_diffusion_config_or_none()
+        attention_config = config.attention_config if config is not None else None
+        attn_backend_cls, spec = get_attn_backend_for_role(
+            role=role,
+            head_size=head_size,
+            attention_config=attention_config,
+            role_category=role_category,
+        )
+        self.attn_impl_cls = attn_backend_cls.get_impl_cls()
+        self.attention = self.attn_impl_cls(..., backend_kwargs=spec.extra if spec else None)
 ```
 
 **Available Backends**:
 
-- **FlashAttention**: Optimized CUDA kernel (FA2/FA3) - memory efficient via tiling
+- **FlashAttention** (`FLASH_ATTN`): Memory-efficient kernel that dispatches to FA2/FA3 on CUDA, AITER on ROCm, and `mindiesd` on Ascend NPU.
 
-- **SDPA**: PyTorch's scaled dot-product attention - default, cross-platform
+- **SDPA** (`TORCH_SDPA`): PyTorch's scaled dot-product attention — cross-platform fallback.
 
-- **SageAttention**: Sparse attention implementation from SageAttention library
-
-- **AscendAttention**: NPU-optimized attention for Ascend hardware
+- **SageAttention** (`SAGE_ATTN`): Quantized attention implementation from the SageAttention library.
 
 These backends provide the **kernel implementations** for attention computation. For attention-level sequence parallelism strategies (Ring Attention, Ulysses), see [Parallel Attention](#52-parallel-attention).
 
 #### Backend Selection Mechanism
 
+Selection is driven by `AttentionConfig` on `OmniDiffusionConfig`, which carries a global `default` plus a `per_role` map of `AttentionSpec` entries. A role string is resolved in this order:
+
 ```python
-def get_attn_backend(head_size: int) -> type[AttentionBackend]:
-    # Check environment variable
-    backend_name = os.environ.get("DIFFUSION_ATTENTION_BACKEND")
-
-    if backend_name:
-        return load_backend(backend_name.upper())
-
-    # Default to SDPA
-    return SDPABackend
+def get_attn_backend_for_role(role, head_size, attention_config=None, role_category=None):
+    # 1. attention_config.per_role[role]            — exact match
+    # 2. attention_config.per_role[role_category]   — category fallback
+    # 3. attention_config.default                   — global default
+    # 4. Platform default                           — hardware-specific
+    if attention_config is not None:
+        spec, source = attention_config.resolve_with_source(
+            role=role, role_category=role_category,
+        )
+        if spec is not None:
+            return load_backend(spec.backend), spec
+    return current_omni_platform.get_diffusion_attn_backend_cls(...), None
 ```
 
 **Selection Priority**:
 
-1. **Environment Variable**: `DIFFUSION_ATTENTION_BACKEND` for manual override
+1. **Per-role override** (`--diffusion-attention-config.per_role.<role>.backend`) — finest control; matched on the layer's exact `role` string.
 
-    - Valid values: `FLASH_ATTN`, `TORCH_SDPA`, `SAGE_ATTN`, `ASCEND`
+2. **Role category fallback** (`--diffusion-attention-config.per_role.<category>.backend`) — used when an exact match is missing and the layer declared `role_category` (e.g. a `"mymodel.audio_to_video"` site can fall back to `"cross"`).
 
-    - Example: `export DIFFUSION_ATTENTION_BACKEND=SAGE_ATTN`
+3. **Global default** (`--diffusion-attention-backend FLASH_ATTN`, or `--diffusion-attention-config.default.backend`, or `DIFFUSION_ATTENTION_BACKEND` env var).
 
-2. **Automatic Fallback**: Falls back to SDPA if selected backend unavailable
+4. **Platform default** — `current_omni_platform.get_diffusion_attn_backend_cls(...)` picks the best-available kernel for the hardware.
 
-3. **Hardware Detection**: Can select based on device type (NPU, CUDA, etc.)
+`AttentionSpec.extra` is forwarded to the backend constructor as `backend_kwargs`, so backend-specific parameters (e.g. SparseBlock `block_size`) can be set without changing model code.
+
+For the user-facing CLI surface, see [Diffusion Attention Backends](../../user_guide/diffusion/attention_backends.md). For the role declaration contract on the model side, see [Adding a Diffusion Model](../../contributing/model/adding_diffusion_model.md).
 
 **Backend Availability**:
 
 - **SDPA**: Always available (PyTorch built-in)
 
-- **FlashAttention**: Requires `flash-attn` package installed
+- **FlashAttention**: Requires `flash-attn` on CUDA, `aiter` on ROCm, or `mindiesd` on Ascend NPU
 
 - **SageAttention**: Requires `sage-attention` package (from THU-ML GitHub)
 
-- **AscendAttention**: Only available on Ascend NPU hardware
-
 #### Attention Backend Registry
 
-**Location**: `vllm_omni/diffusion/attention/selector.py`
+**Location**: `vllm_omni/diffusion/attention/selector.py` + `vllm_omni/platforms/<device>/platform.py`
 
-The attention system uses a **registry pattern** to manage and dynamically load attention backends. This allows for easy extension and runtime selection of backends.
-
-
-**Registry Structure**:
+Backend resolution is delegated to the active platform: `current_omni_platform.get_diffusion_attn_backend_cls(selected_backend, head_size)` returns a fully-qualified class path that `_load_backend_cls` imports lazily, with the result cached by `(backend_name, head_size)`.
 
 ```python
-# Registry mapping backend names to their module paths and class names
-_BACKEND_CONFIG = {
-    "FLASH_ATTN": {
-        "module": "vllm_omni.diffusion.attention.backends.flash_attn",
-        "class": "FlashAttentionBackend",
-    },
-    "TORCH_SDPA": {
-        "module": "vllm_omni.diffusion.attention.backends.sdpa",
-        "class": "SDPABackend",
-    },
-    "SAGE_ATTN": {
-        "module": "vllm_omni.diffusion.attention.backends.sage_attn",
-        "class": "SageAttentionBackend",
-    },
-    "ASCEND": {
-        "module": "vllm_omni.diffusion.attention.backends.ascend_attn",
-        "class": "AscendAttentionBackend",
-    },
-}
+@cache
+def _cached_get_backend_cls(backend_name: str | None, head_size: int) -> type[AttentionBackend]:
+    backend_cls_path = current_omni_platform.get_diffusion_attn_backend_cls(
+        selected_backend=backend_name,
+        head_size=head_size,
+    )
+    return _load_backend_cls(backend_cls_path)
 ```
 
+Each platform (`cuda`, `rocm`, `xpu`, `musa`, `npu`) maps backend names like `"FLASH_ATTN"`, `"TORCH_SDPA"`, `"SAGE_ATTN"` to the right backend class path for that hardware, including head-size compatibility checks. Passing `selected_backend=None` lets the platform pick its own default.
+
 #### Attention Backend Integration
 
 The `Attention` layer integrates backends through a unified interface. Here's how **FlashAttentionBackend** is integrated as an example:

docs/getting_started/installation/gpu.md

@@ -34,7 +34,7 @@ vLLM-Omni is a Python library that supports the following GPU variants. The libr
 
 ### Pre-built wheels
 
-Note: Pre-built wheels are currently available for vLLM-Omni 0.11.0rc1, 0.12.0rc1, 0.14.0rc1, 0.14.0, 0.16.0, and 0.18.0. If you need a newer unreleased revision, please [build from source](https://docs.vllm.ai/projects/vllm-omni/en/latest/getting_started/installation/gpu/#build-wheel-from-source).
+Note: Pre-built wheels are currently available for vLLM-Omni 0.11.0rc1, 0.12.0rc1, 0.14.0rc1, 0.14.0, 0.16.0, 0.18.0, 0.20.0, and 0.21.0. If you need a newer unreleased revision, please [build from source](https://docs.vllm.ai/projects/vllm-omni/en/latest/getting_started/installation/gpu/#build-wheel-from-source).
 
 === "NVIDIA CUDA"
 

docs/getting_started/installation/gpu/cuda.inc.md

@@ -20,7 +20,7 @@ Therefore, it is recommended to install vLLM and vLLM-Omni with a **fresh new**
 
 vLLM-Omni is built based on vLLM. Please install it with command below.
 ```bash
-uv pip install vllm --torch-backend=auto
+uv pip install vllm==0.21.0 --torch-backend=auto
 ```
 
 #### Installation of vLLM-Omni
@@ -39,13 +39,13 @@ uv pip install 'vllm-omni[demo]'
 # --8<-- [start:build-wheel-from-source]
 
 #### Installation of vLLM
-If you do not need to modify source code of vLLM, you can directly install the stable 0.20.0 release version of the library
+If you do not need to modify source code of vLLM, you can directly install the stable 0.21.0 release version of the library
 
 ```bash
-uv pip install vllm==0.20.0 --torch-backend=auto
+uv pip install vllm==0.21.0 --torch-backend=auto
 ```
 
-The 0.20.0 release of vLLM ships CUDA 13.0-compatible binaries by default. If you need a different CUDA variant or want to reuse an existing PyTorch installation, build vLLM from source instead.
+The 0.21.0 release of vLLM ships CUDA 13.0-compatible binaries by default. If you need a different CUDA variant or want to reuse an existing PyTorch installation, build vLLM from source instead.
 
 #### Installation of vLLM-Omni
 Since vllm-omni is rapidly evolving, it's recommended to install it from source
@@ -66,12 +66,12 @@ If you want to check, modify or debug with source code of vLLM, install the libr
 ```bash
 git clone https://github.com/vllm-project/vllm.git
 cd vllm
-git checkout v0.20.0
+git checkout v0.21.0
 ```
 Set up environment variables to get pre-built wheels. If there are internet problems, just download the whl file manually. And set `VLLM_PRECOMPILED_WHEEL_LOCATION` as your local absolute path of whl file.
 ```bash
-#For CUDA 13.0 (the default for v0.20.0; the wheel filename has no `+cu130` suffix)
-export VLLM_PRECOMPILED_WHEEL_LOCATION=https://github.com/vllm-project/vllm/releases/download/v0.20.0/vllm-0.20.0-cp38-abi3-manylinux_2_35_x86_64.whl
+#For CUDA 13.0 (the default for v0.21.0; the wheel filename has no `+cu130` suffix)
+export VLLM_PRECOMPILED_WHEEL_LOCATION=https://github.com/vllm-project/vllm/releases/download/v0.21.0/vllm-0.21.0-cp38-abi3-manylinux_2_35_x86_64.whl
 ```
 Install vllm with command below (If you have no existing PyTorch).
 ```bash
@@ -102,11 +102,11 @@ docker run --runtime nvidia --gpus 2 \
     --env "HF_TOKEN=$HF_TOKEN" \
     -p 8091:8091 \
     --ipc=host \
-    vllm/vllm-omni:v0.18.0 \
-    --model Qwen/Qwen3-Omni-30B-A3B-Instruct --port 8091
+    vllm/vllm-omni:v0.21.0 \
+    vllm serve Qwen/Qwen3-Omni-30B-A3B-Instruct --omni --port 8091
 ```
 
 !!! tip
-    You can use this docker image to serve models the same way you would with in vLLM! To do so, make sure you overwrite the default entrypoint (`vllm serve --omni`) which works only for models supported in the vLLM-Omni project.
+    The CUDA image does not define a default entrypoint, so include `vllm serve ... --omni` after the image name.
 
 # --8<-- [end:pre-built-images]

docs/getting_started/installation/gpu/rocm.inc.md

@@ -13,7 +13,7 @@ vLLM-Omni current recommends the steps in under setup through Docker Images.
 
 vLLM-Omni is built based on vLLM. Please install it with command below.
 ```bash
-uv pip install vllm==0.20.0+rocm721 --extra-index-url https://wheels.vllm.ai/rocm/0.20.0/rocm721
+uv pip install vllm==0.21.0+rocm722 --extra-index-url https://wheels.vllm.ai/rocm/0.21.0/rocm722
 ```
 
 #### Installation of vLLM-Omni
@@ -34,13 +34,13 @@ uv pip install onnxruntime-rocm
 # --8<-- [start:build-wheel-from-source]
 
 #### Installation of vLLM
-If you do not need to modify source code of vLLM, you can directly install the stable 0.20.0 release version of the library
+If you do not need to modify source code of vLLM, you can directly install the stable 0.21.0 release version of the library
 
 ```bash
-uv pip install vllm==0.20.0+rocm721 --extra-index-url https://wheels.vllm.ai/rocm/0.20.0/rocm721
+uv pip install vllm==0.21.0+rocm722 --extra-index-url https://wheels.vllm.ai/rocm/0.21.0/rocm722
 ```
 
-The pre-built 0.20.0 vLLM wheel targets ROCm 7.2.1. If you need a different ROCm stack or want to reuse an existing PyTorch installation, build vLLM from source instead.
+The pre-built 0.21.0 vLLM wheel targets ROCm 7.2.2. If you need a different ROCm stack or want to reuse an existing PyTorch installation, build vLLM from source instead.
 
 #### Installation of vLLM-Omni
 Since vllm-omni is rapidly evolving, it's recommended to install it from source
@@ -58,7 +58,7 @@ If you want to check, modify or debug with source code of vLLM, install the libr
 ```bash
 git clone https://github.com/vllm-project/vllm.git
 cd vllm
-git checkout v0.20.0
+git checkout v0.21.0
 python3 -m pip install -r requirements/rocm.txt
 python3 setup.py develop
 ```
@@ -130,7 +130,7 @@ docker run --rm \
   -v ~/.cache/huggingface:/root/.cache/huggingface \
   --env "HF_TOKEN=$HF_TOKEN" \
   -p 8091:8091 \
-  vllm/vllm-omni-rocm:v0.20.0 \
+  vllm/vllm-omni-rocm:v0.21.0 \
   --model Qwen/Qwen3-Omni-30B-A3B-Instruct --omni --port 8091
 ```
 
@@ -149,7 +149,7 @@ docker run --rm -it \
   -v ~/.cache/huggingface:/root/.cache/huggingface \
   --env "HF_TOKEN=$HF_TOKEN" \
   --entrypoint bash \
-  vllm/vllm-omni-rocm:v0.20.0
+  vllm/vllm-omni-rocm:v0.21.0
 ```
 
 # --8<-- [end:pre-built-images]

docs/getting_started/quickstart.md

@@ -19,10 +19,10 @@ uv venv --python 3.12 --seed
 source .venv/bin/activate
 
 # On CUDA
-uv pip install vllm==0.20.0 --torch-backend=auto
+uv pip install vllm==0.21.0 --torch-backend=auto
 
 # On ROCm
-uv pip install vllm==0.20.0+rocm721 --extra-index-url https://wheels.vllm.ai/rocm/0.20.0/rocm721
+uv pip install vllm==0.21.0+rocm721 --extra-index-url https://wheels.vllm.ai/rocm/0.21.0/rocm721
 
 git clone https://github.com/vllm-project/vllm-omni.git
 cd vllm-omni
@@ -35,7 +35,7 @@ For additional installation methods — please see the [installation guide](inst
 !!! note
     It is important to install the same major & minor version of vLLM and vLLM Omni, otherwise things may not work as expected. If the versions are misaligned, you will see a warning when you import vLLM Omni.
 
-    If you are seeing strange behavior with the `vllm` command not handling the `--omni` flag correctly, you most likely have a version mismatch with vLLM < `0.20.0` and vLLM Omni `0.20.0`, as vLLM Omni no longer hijacks the vLLM entrypoint. Updating vLLM should resolve this issue.
+    If you are seeing strange behavior with the `vllm` command not handling the `--omni` flag correctly, you most likely have a version mismatch with vLLM < `0.21.0` and vLLM Omni `0.21.0`, as vLLM Omni no longer hijacks the vLLM entrypoint. Updating vLLM should resolve this issue.
 
 ## Offline Inference
 

docs/models/supported_models.md

@@ -58,15 +58,20 @@ th {
 | `Qwen3TTSForConditionalGeneration` | Qwen3-TTS-12Hz-1.7B-CustomVoice | `Qwen/Qwen3-TTS-12Hz-1.7B-CustomVoice` | ✅︎ | ✅︎ | ✅︎ | ✅︎ |
 | `Qwen3TTSForConditionalGeneration` | Qwen3-TTS-12Hz-1.7B-VoiceDesign | `Qwen/Qwen3-TTS-12Hz-1.7B-VoiceDesign` | ✅︎ | ✅︎ | ✅︎ | ✅︎ |
 | `Qwen3TTSForConditionalGeneration` | Qwen3-TTS-12Hz-1.7B-Base | `Qwen/Qwen3-TTS-12Hz-0.6B-Base` | ✅︎ | ✅︎ | ✅︎ | ✅︎ |
+| `GLMTTSForConditionalGeneration` | GLM-TTS | `zai-org/GLM-TTS` | ✅︎ | | | |
 | `NextStep11Pipeline` | NextStep-1.1 | `stepfun-ai/NextStep-1.1` | ✅︎ | ✅︎ | | ✅︎ |
 | `MiMoAudioModel` | MiMo-Audio-7B-Instruct | `XiaomiMiMo/MiMo-Audio-7B-Instruct` | ✅︎ | ✅︎ | | |
 | `MiMoV2ASRForCausalLM` | MiMo-V2.5-ASR | `XiaomiMiMo/MiMo-V2.5-ASR` | ✅︎ | ✅︎ | | |
 | `Flux2Pipeline` | FLUX.2-dev | `black-forest-labs/FLUX.2-dev` | ✅︎ | ✅︎ | | |
 | `FishSpeechSlowARForConditionalGeneration` | Fish Speech S2 Pro | `fishaudio/s2-pro` | ✅︎ | ✅︎ | | |
 | `DreamIDOmniPipeline` | DreamID-Omni | `XuGuo699/DreamID-Omni` | ✅︎ | ✅︎ | | |
+| `SenseNovaU1Pipeline` | SenseNova-U1 (DiT-only) | `SenseNova/SenseNova-U1-8B-MoT` | ✅︎ | | | |
 | `HunyuanVideo15Pipeline` | HunyuanVideo-1.5-T2V | `hunyuanvideo-community/HunyuanVideo-1.5-Diffusers-480p_t2v`, `hunyuanvideo-community/HunyuanVideo-1.5-Diffusers-720p_t2v` | ✅︎ | ✅︎ | | |
 | `HunyuanVideo15ImageToVideoPipeline` | HunyuanVideo-1.5-I2V | `hunyuanvideo-community/HunyuanVideo-1.5-Diffusers-480p_i2v`, `hunyuanvideo-community/HunyuanVideo-1.5-Diffusers-720p_i2v` | ✅︎ | ✅︎ | | |
 | `VoxtralTTSForConditionalGeneration` | Voxtral TTS | `mistralai/Voxtral-4B-TTS-2603` | ✅︎ | ✅︎ | | |
+| `CovoAudioForConditionalGeneration` | Covo-Audio-Chat | `tencent/Covo-Audio-Chat` | ✅︎ | | | |
 |`DyninOmniForConditionalGeneration` | Dynin-Omni | `snu-aidas/Dynin-Omni` | ✅︎ | | | |
 | `ErnieImagePipeline` | ERNIE-Image | `baidu/ERNIE-Image`, `baidu/ERNIE-Image-Turbo` | ✅︎ | ✅︎ | ✅︎ | ✅︎ |
+|`HiDreamImagePipeline` | HiDream-I1-Full | `HiDream-ai/HiDream-I1-Full` | ✅︎ | ✅︎ | | |
+
 ✅︎ indicates the model is supported on that backend. Empty cells mean not listed as supported on that backend.

docs/serving/chat_completions_api.md

@@ -1,4 +1,4 @@
-# Diffusion Chat Completions API
+# Chat Completions API
 
 vLLM-Omni supports generating and editing images via the `/v1/chat/completions`
 endpoint using diffusion models. This page explains how to pass generation

docs/serving/speech_api.md

@@ -5,6 +5,9 @@ vLLM-Omni provides an OpenAI-compatible API for text-to-speech (TTS) generation.
 - **Qwen3-TTS** (`Qwen/Qwen3-TTS-12Hz-*`) -- Qwen3-based TTS with CustomVoice, VoiceDesign, and Base (voice cloning) task types. Output: 24 kHz.
 - **Fish Speech S2 Pro** (`fishaudio/s2-pro`) -- Dual-AR TTS with DAC codec. Supports text-to-speech and voice cloning via reference audio. Output: 44.1 kHz.
 - **Voxtral TTS** (`mistralai/Voxtral-4B-TTS-2603`) -- AR + FlowMatching TTS with preset voices. Output: 24 kHz.
+- **CosyVoice3** (`FunAudioLLM/Fun-CosyVoice3-0.5B-2512`) -- 2-stage talker + flow-matching code2wav. Voice cloning via `ref_audio` + `ref_text` (no presets). Output: 24 kHz.
+
+See the [Supported Models](#supported-models) section below for the full list, including OmniVoice, VoxCPM2, and MOSS-TTS-Nano.
 
 Each server instance runs a single model (specified at startup via `vllm serve <model> --omni`).
 
@@ -26,6 +29,10 @@ vllm serve fishaudio/s2-pro --omni --port 8091
 
 # Voxtral TTS
 vllm serve mistralai/Voxtral-4B-TTS-2603 --omni --port 8091
+
+# CosyVoice3 (voice cloning only — supply ref_audio + ref_text per request)
+vllm serve FunAudioLLM/Fun-CosyVoice3-0.5B-2512 \
+    --omni --port 8091 --trust-remote-code
 ```
 
 ### Generate Speech
@@ -531,16 +538,18 @@ for result in response.json()["results"]:
 
 All items are fanned out to `generate()` concurrently. The engine's stage worker automatically batches them up to the configured `max_batch_size` and queues the rest — no client-side throttling needed.
 
-For best throughput, set both stages' `max_num_seqs` to ≥4 via `--stage-overrides`:
+For best throughput, set both stages' `max_num_seqs` above 1 via `--stage-overrides`. On the current Qwen3-TTS CustomVoice benchmark, stage 1 performed best at `max_num_seqs: 10`:
 
 ```bash
 vllm serve Qwen/Qwen3-TTS-12Hz-1.7B-CustomVoice \
     --omni --port 8091 --trust-remote-code --enforce-eager \
-    --stage-overrides '{"0":{"max_num_seqs":4,"gpu_memory_utilization":0.2},
-                        "1":{"max_num_seqs":4,"gpu_memory_utilization":0.2}}'
+    --stage-overrides '{"0":{"max_num_seqs":10,"gpu_memory_utilization":0.2},
+                        "1":{"max_num_seqs":10,"gpu_memory_utilization":0.2}}'
 ```
 
-The bundled `qwen3_tts.yaml` uses `max_num_seqs: 1` (single request) on both stages. Bumping to 4 yields roughly 4× throughput on the talker and lets stage 1 batch chunks across in-flight requests.
+The bundled `qwen3_tts.yaml` uses a multi-request default and lets stage 1 batch chunks across in-flight requests. For latency-sensitive deployments, avoid forcing stage 1 back to `max_num_seqs: 1`; benchmark before reducing it below `10`.
+
+The bundled config also sets `initial_codec_chunk_frames: 1`. This emits only the first audio chunk early for lower TTFA, then returns to the normal `codec_chunk_frames` window so Code2Wav does not repeatedly decode tiny overlapping chunks.
 
 ## Supported Models
 

docs/serving/videos_api.md

@@ -0,0 +1,152 @@
+# Videos API
+
+vLLM-Omni provides an OpenAI-compatible video generation API for diffusion
+video models. The API supports asynchronous video jobs through `/v1/videos` and
+a synchronous benchmark-oriented endpoint through `/v1/videos/sync`.
+
+Each server instance runs a single model specified at startup with
+`vllm serve <model> --omni`.
+
+## Quick Start
+
+### Start the Server
+
+```bash
+vllm serve Wan-AI/Wan2.2-T2V-A14B-Diffusers --omni --port 8091
+```
+
+### Create a Video Job
+
+```bash
+create_response=$(curl -s http://localhost:8091/v1/videos \
+  -F "prompt=A cinematic tracking shot of a mountain lake at sunrise" \
+  -F "width=1280" \
+  -F "height=720" \
+  -F "num_frames=80" \
+  -F "fps=16" \
+  -F "num_inference_steps=40")
+
+video_id=$(echo "${create_response}" | jq -r '.id')
+```
+
+### Poll and Download
+
+```bash
+curl -s "http://localhost:8091/v1/videos/${video_id}" | jq .
+curl -L "http://localhost:8091/v1/videos/${video_id}/content" -o output.mp4
+```
+
+## API Reference
+
+### Endpoints
+
+| Endpoint | Method | Description |
+|----------|--------|-------------|
+| `/v1/videos` | `POST` | Create an asynchronous video generation job |
+| `/v1/videos/sync` | `POST` | Generate a video synchronously and return raw video bytes |
+| `/v1/videos/{video_id}` | `GET` | Retrieve job status and metadata |
+| `/v1/videos` | `GET` | List stored video jobs |
+| `/v1/videos/{video_id}/content` | `GET` | Download generated video content |
+| `/v1/videos/{video_id}` | `DELETE` | Delete a video job and stored output |
+
+### Request Parameters
+
+`POST /v1/videos` and `POST /v1/videos/sync` accept `multipart/form-data`.
+
+#### OpenAI-style fields
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| `prompt` | string | **required** | Text prompt for video generation |
+| `model` | string | server's model | Optional model name |
+| `seconds` | string | null | Requested clip duration in seconds |
+| `size` | string | null | Requested output size in `WIDTHxHEIGHT` format |
+| `user` | string | null | Optional user identifier |
+
+#### vLLM-Omni extension fields
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| `input_reference` | file | null | Uploaded reference image for image-to-video requests |
+| `image_reference` | string | null | JSON-encoded reference image payload; do not combine with `input_reference` |
+| `width` | integer | model default | Output video width |
+| `height` | integer | model default | Output video height |
+| `num_frames` | integer | model default | Number of generated frames |
+| `fps` | integer | model default | Output frames per second |
+| `num_inference_steps` | integer | model default | Number of diffusion steps |
+| `guidance_scale` | number | null | CFG guidance scale for the low-noise stage |
+| `guidance_scale_2` | number | null | CFG guidance scale for the high-noise stage |
+| `boundary_ratio` | number | null | Boundary split ratio for multi-stage denoising |
+| `flow_shift` | number | null | Scheduler flow-shift value |
+| `true_cfg_scale` | number | null | True CFG scale when supported by the model |
+| `seed` | integer | null | Random seed for reproducibility |
+| `negative_prompt` | string | null | Text describing what to avoid in the generated video |
+| `enable_frame_interpolation` | boolean | null | Enable post-generation frame interpolation |
+| `frame_interpolation_exp` | integer | null | Interpolation exponent; `1=2x`, `2=4x`, and so on |
+| `frame_interpolation_scale` | number | null | RIFE inference scale |
+| `frame_interpolation_model_path` | string | null | Local path or Hugging Face repo for the interpolation model |
+| `lora` | string | null | JSON-encoded LoRA configuration object |
+| `extra_params` | string | null | JSON-encoded object for additional model-specific parameters |
+
+### Create Response
+
+`POST /v1/videos` returns a job record:
+
+```json
+{
+  "id": "video-123",
+  "status": "queued",
+  "created_at": 1701234567
+}
+```
+
+The final content is available from `/v1/videos/{video_id}/content` after the
+job status becomes `completed`.
+
+### Synchronous Response
+
+`POST /v1/videos/sync` blocks until generation finishes and returns raw video
+bytes. It is useful for benchmarks and simple scripts that do not need job
+storage or polling.
+
+## Examples
+
+### Image-to-Video
+
+```bash
+curl -s http://localhost:8091/v1/videos \
+  -F "prompt=animate this image with subtle camera movement" \
+  -F "input_reference=@input.png" \
+  -F "width=1280" \
+  -F "height=720" \
+  -F "num_frames=80" \
+  -F "fps=16"
+```
+
+### Synchronous Generation
+
+```bash
+curl -X POST http://localhost:8091/v1/videos/sync \
+  -F "prompt=A small robot walking through a neon city" \
+  -F "width=854" \
+  -F "height=480" \
+  -F "num_frames=80" \
+  -F "fps=16" \
+  -o output.mp4
+```
+
+## Storage
+
+Set `VLLM_OMNI_STORAGE_PATH` to control where asynchronous video outputs are
+stored:
+
+```bash
+export VLLM_OMNI_STORAGE_PATH=/var/tmp/vllm-omni-videos
+```
+
+## Model-Specific Examples
+
+For complete text-to-video and image-to-video walkthroughs, see:
+
+- [Text-to-Video](../user_guide/examples/online_serving/text_to_video.md)
+- [Image-to-Video](../user_guide/examples/online_serving/image_to_video.md)

docs/user_guide/diffusion/attention_backends.md

@@ -1,10 +1,10 @@
 # Diffusion Attention Backends
 
-This document describes the diffusion attention backends available in vLLM-Omni, how to select them, and how to use SageAttention.
+This document describes the diffusion attention backends available in vLLM-Omni, how to select them globally and per-role, and how to use SageAttention.
 
 ## Overview
 
-Diffusion attention backend selection is controlled by the `DIFFUSION_ATTENTION_BACKEND` environment variable and resolved in `vllm_omni.diffusion.attention.selector`.
+Diffusion attention backend selection is resolved in `vllm_omni.diffusion.attention.selector`. It looks up the backend from a structured `AttentionConfig` carried on `OmniDiffusionConfig` and falls back to the platform default when nothing is configured.
 
 This backend is used by diffusion attention layers such as the DiT attention in video and image generation models.
 
@@ -14,7 +14,7 @@ On CUDA, the practical choices today are:
 - `TORCH_SDPA`: PyTorch `scaled_dot_product_attention`.
 - `SAGE_ATTN`: SageAttention backend, if `sageattention` is installed.
 
-If `DIFFUSION_ATTENTION_BACKEND` is unset, vLLM-Omni asks the current platform to choose the default backend. On CUDA, that normally means `FLASH_ATTN` when available, otherwise `TORCH_SDPA`.
+If no attention backend is configured, vLLM-Omni asks the current platform to choose the default. On CUDA, that normally means `FLASH_ATTN` when available, otherwise `TORCH_SDPA`.
 
 ## Backend Options
 
@@ -24,19 +24,77 @@ If `DIFFUSION_ATTENTION_BACKEND` is unset, vLLM-Omni asks the current platform t
 | `TORCH_SDPA` | Most conservative fallback. Useful for debugging or compatibility. |
 | `SAGE_ATTN` | Requires `sageattention`. Can improve performance on some workloads, but output quality must be validated model-by-model. |
 
-## Selection Priority
+## Configuration
 
-Diffusion attention backend selection follows this order:
+Diffusion attention backends can be configured three ways, in priority order:
 
-1. `DIFFUSION_ATTENTION_BACKEND`
-2. Platform default
+1. **`--diffusion-attention-config`** — structured per-role config (highest priority).
+2. **`--diffusion-attention-backend` / `DIFFUSION_ATTENTION_BACKEND` env var** — global shorthand that sets the default backend.
+3. **Platform default** — used when nothing is configured.
 
-Example:
+`--diffusion-attention-backend` is shorthand for `--diffusion-attention-config.default.backend`. It may be combined with `--diffusion-attention-config.per_role.*` overrides, but is mutually exclusive with `--diffusion-attention-config.default.backend`.
+
+### Global default
+
+Set the default backend for every diffusion attention layer:
 
 ```bash
+# CLI flag
+vllm-omni serve <model> --diffusion-attention-backend SAGE_ATTN
+
+# Environment variable (also recognized for backwards compatibility)
 export DIFFUSION_ATTENTION_BACKEND=SAGE_ATTN
 ```
 
+### Per-role configuration
+
+Roles are free-form strings declared by each diffusion model. The two common categories are `"self"` and `"cross"`; model-specific roles (e.g. `"ltx2.audio_to_video"`) may also be declared. A role string is matched in this order:
+
+1. Exact `per_role[role]` match
+2. `per_role[role_category]` fallback (e.g. `"ltx2.audio_to_video"` → `"cross"`)
+3. `default`
+4. Platform default
+
+Use vLLM-style dotted flags or one JSON blob:
+
+```bash
+# Dotted flags
+vllm-omni serve <model> \
+    --diffusion-attention-config.default.backend FLASH_ATTN \
+    --diffusion-attention-config.per_role.cross.backend TORCH_SDPA
+
+# JSON
+vllm-omni serve <model> \
+    --diffusion-attention-config '{"default":{"backend":"FLASH_ATTN"},"per_role":{"cross":{"backend":"TORCH_SDPA"}}}'
+```
+
+Backends may also accept backend-specific parameters via `extra`:
+
+```bash
+--diffusion-attention-config.per_role.self.backend SPARSE_BLOCK \
+--diffusion-attention-config.per_role.self.extra.block_size 128
+```
+
+### Programmatic API
+
+When constructing `OmniDiffusionConfig` directly:
+
+```python
+from vllm_omni.diffusion.data import AttentionConfig, AttentionSpec, OmniDiffusionConfig
+
+config = OmniDiffusionConfig(
+    attention_config=AttentionConfig(
+        default=AttentionSpec(backend="FLASH_ATTN"),
+        per_role={
+            "cross": AttentionSpec(backend="TORCH_SDPA"),
+        },
+    ),
+    ...,
+)
+```
+
+A plain dict is also accepted and normalized to `AttentionConfig`.
+
 ## SageAttention Installation
 
 vLLM-Omni expects SageAttention to be installed into the same Python environment as vLLM-Omni.
@@ -85,7 +143,21 @@ DIFFUSION_ATTENTION_BACKEND=SAGE_ATTN python examples/offline_inference/text_to_
     --output outputs/wan22_sage.mp4
 ```
 
-### Compare Against FlashAttention
+### Mixed backends across roles
+
+Use `FLASH_ATTN` for self-attention and `TORCH_SDPA` for cross-attention:
+
+```bash
+python examples/offline_inference/text_to_video/text_to_video.py \
+    --model Wan-AI/Wan2.2-TI2V-5B-Diffusers \
+    --prompt "A dog running across a field of golden wheat." \
+    --diffusion-attention-config.per_role.self.backend FLASH_ATTN \
+    --diffusion-attention-config.per_role.cross.backend TORCH_SDPA \
+    --tensor-parallel-size 2 \
+    --output outputs/wan22_mixed.mp4
+```
+
+### Compare against FlashAttention
 
 Unset the backend override, or explicitly use `FLASH_ATTN`:
 

docs/user_guide/diffusion/cpu_offload_diffusion.md

@@ -38,14 +38,15 @@ vllm-omni serve diffusion Wan-AI/Wan2.2-T2V-A14B-Diffusers --enable-cpu-offload
 
 ### To Support a Model
 
-Implement the `SupportsModuleOffload` protocol to declare which
-submodules participate in offloading:
+Implement the `SupportsComponentDiscovery` protocol to declare which
+submodules serve as pipeline components (used by offloading, HSDP
+sharding, and other framework features):
 
 ```python
 from typing import ClassVar
-from vllm_omni.diffusion.models.interface import SupportsModuleOffload
+from vllm_omni.diffusion.models.interface import SupportsComponentDiscovery
 
-class MyPipeline(nn.Module, SupportsModuleOffload):
+class MyPipeline(nn.Module, SupportsComponentDiscovery):
     _dit_modules: ClassVar[list[str]] = ["transformer"]
     _encoder_modules: ClassVar[list[str]] = ["text_encoder", "vision_model"]
     _vae_modules: ClassVar[list[str]] = ["vae"]
@@ -158,7 +159,7 @@ class Flux2Transformer2DModel(nn.Module):
 The offloader discovers pipeline components in two ways:
 
 1. **Protocol-based** (preferred): If the pipeline implements
-    `SupportsModuleOffload`, its `_dit_modules`, `_encoder_modules`,
+    `SupportsComponentDiscovery`, its `_dit_modules`, `_encoder_modules`,
     `_vae_modules`, and `_resident_modules` class variables are used
     directly.  All attribute names support dotted paths (e.g.
     `"pipe.transformer"`, `"bagel.time_embedder"`) for nested submodules.

docs/user_guide/diffusion/frame_interpolation.md

@@ -28,7 +28,6 @@ Frame interpolation is currently supported for:
 
 - `WanPipeline` (Wan2.2 text-to-video)
 - `WanImageToVideoPipeline`
-- `Wan22TI2VPipeline`
 
 ## Request Parameters
 

docs/user_guide/diffusion/multi_replica_serving.md

@@ -1,80 +0,0 @@
-# Diffusion Multi-Replica Serving
-
-Diffusion stages can be replicated in online serving by setting `runtime.num_replicas` on a `stage_type: diffusion` stage. Each replica owns an independent diffusion engine process and receives requests through round-robin routing with request affinity.
-
-## When to Use
-
-Use multi-replica serving when one diffusion process does not saturate the available GPUs, or when you want higher request throughput for many independent image/video generation requests. It improves concurrency throughput; it does not make a single request faster.
-
-## Configuration
-
-A replica consumes the devices required by that diffusion stage. For single-device diffusion pipelines, set `runtime.devices` to one device per replica:
-
-```yaml
-stages:
-  - stage_id: 0
-    stage_type: diffusion
-    runtime:
-      devices: "0,1,2,3"
-      num_replicas: 4
-    engine_args:
-      model: Qwen/Qwen-Image
-      parallel_config:
-        world_size: 1
-```
-
-For multi-device diffusion pipelines, `parallel_config.world_size` is treated as the number of devices per replica. For example, four 2-GPU replicas need eight devices:
-
-```yaml
-stages:
-  - stage_id: 0
-    stage_type: diffusion
-    runtime:
-      devices: "0,1,2,3,4,5,6,7"
-      num_replicas: 4
-    engine_args:
-      model: Wan-AI/Wan2.2-T2V-A14B-Diffusers
-      parallel_config:
-        world_size: 2
-```
-
-The runtime splits the device list into contiguous chunks per replica. With the second example, replica 0 uses `0,1`, replica 1 uses `2,3`, replica 2 uses `4,5`, and replica 3 uses `6,7`.
-
-## Serving
-
-Start the server with the stage config:
-
-```bash
-vllm serve Qwen/Qwen-Image \
-  --omni \
-  --port 8099 \
-  --stage-configs-path /path/to/diffusion_multi_replica.yaml
-```
-
-Then send normal OpenAI-compatible diffusion chat requests. The orchestrator routes new requests across replicas and keeps updates/abort calls on the same replica for each request.
-
-## Benchmarking
-
-Benchmark each replica count by changing `runtime.num_replicas` and `runtime.devices`, restarting the server, then running:
-
-```bash
-python benchmarks/diffusion/diffusion_benchmark_serving.py \
-  --base-url http://localhost:8099 \
-  --model Qwen/Qwen-Image \
-  --task t2i \
-  --dataset random \
-  --num-prompts 8 \
-  --request-rate inf \
-  --num-inference-steps 2 \
-  --width 256 --height 256 \
-  --output-file diffusion_replica_4.json
-```
-
-For a quick scaling sweep, test `num_replicas` values `1`, `2`, `3`, and `4` with the same prompt count and generation parameters. Compare throughput and end-to-end latency from the JSON outputs.
-
-## Notes and Limitations
-
-- Multi-replica serving is currently supported for diffusion stages. Single-stage mode still rejects non-diffusion replicas.
-- `runtime.devices` must provide exactly `num_replicas * devices_per_replica` devices.
-- Request-level latency may stay similar or slightly increase because each request still runs on one replica.
-- Throughput improves only when enough concurrent requests are issued and each replica has enough GPU memory.

docs/user_guide/diffusion/parallelism/overview.md

@@ -4,13 +4,14 @@ This guide covers the parallelism methods in vLLM-Omni for speeding up diffusion
 
 ## Supported Methods
 
-| Method | Description |
-|--------|-------------|
-| **[Tensor Parallelism](tensor_parallel.md)** | Shards DiT weights across GPUs to reduce per-GPU memory |
-| **[Sequence Parallelism](sequence_parallel.md)** | Splits sequence dimension across GPUs (Ulysses-SP, Ring-Attention, or hybrid) for high-resolution images and videos |
-| **[CFG-Parallel](cfg_parallel.md)** | Runs CFG positive/negative branches on separate GPUs for ~1.8x speedup on guided generation |
-| **[VAE Patch Parallelism](vae_patch_parallel.md)** | Distributes VAE decode spatially across GPUs to reduce peak VAE memory |
-| **[HSDP](hsdp.md)** | Shards full model weights via PyTorch FSDP2 to enable large-model inference on memory-constrained GPUs |
-| **[Expert Parallelism](expert_parallel.md)** | Shards MoE expert blocks across GPUs for MoE models (e.g. HunyuanImage3.0) |
+| Method                                             | Description                                                                                                         |
+|----------------------------------------------------|---------------------------------------------------------------------------------------------------------------------|
+| **[Tensor Parallelism](tensor_parallel.md)**       | Shards DiT weights across GPUs to reduce per-GPU memory                                                             |
+| **[Sequence Parallelism](sequence_parallel.md)**   | Splits sequence dimension across GPUs (Ulysses-SP, Ring-Attention, or hybrid) for high-resolution images and videos |
+| **[CFG-Parallel](cfg_parallel.md)**                | Runs CFG positive/negative branches on separate GPUs for ~1.8x speedup on guided generation                         |
+| **[Pipeline Parallelism](pipeline_parallel.md)**   | Splits the denoising transformer block-wise across sequential GPU stages to reduce per-GPU model memory             |
+| **[VAE Patch Parallelism](vae_patch_parallel.md)** | Distributes VAE decode spatially across GPUs to reduce peak VAE memory                                              |
+| **[HSDP](hsdp.md)**                                | Shards full model weights via PyTorch FSDP2 to enable large-model inference on memory-constrained GPUs              |
+| **[Expert Parallelism](expert_parallel.md)**       | Shards MoE expert blocks across GPUs for MoE models (e.g. HunyuanImage3.0)                                          |
 
 See [Supported Models](../../diffusion_features.md#supported-models) for per-model compatibility.

docs/user_guide/diffusion/parallelism/pipeline_parallel.md

@@ -0,0 +1,205 @@
+# Pipeline Parallelism Guide
+
+## Table of Content
+
+- [Overview](#overview)
+- [Quick Start](#quick-start)
+- [Example Script](#example-script)
+- [Configuration Parameters](#configuration-parameters)
+- [Best Practices](#best-practices)
+- [Troubleshooting](#troubleshooting)
+- [Summary](#summary)
+
+---
+
+## Overview
+
+Pipeline Parallelism splits the denoising transformer block-wise into sequential stages across GPUs. Each rank owns only
+part of the transformer, which reduces per-GPU model memory and enables larger diffusion models to run across multiple
+devices.
+
+It can also be combined with other distributed methods such as CFG-Parallel, Tensor Parallelism, and Sequence
+Parallelism.
+
+See supported models list in [Supported Models](../../diffusion_features.md#supported-models).
+
+---
+
+## Quick Start
+
+### Basic Usage
+
+Simplest working example:
+
+```python
+from vllm_omni import Omni
+from vllm_omni.diffusion.data import DiffusionParallelConfig
+from vllm_omni.inputs.data import OmniDiffusionSamplingParams
+
+omni = Omni(
+    model="Wan-AI/Wan2.2-TI2V-5B-Diffusers",
+    parallel_config=DiffusionParallelConfig(
+        pipeline_parallel_size=2,
+    ),
+)
+
+outputs = omni.generate(
+    {"prompt": "A cinematic drone shot over snowy mountains"},
+    OmniDiffusionSamplingParams(
+        num_inference_steps=40,
+        num_frames=81,
+        height=704,
+        width=1280,
+    ),
+)
+```
+
+---
+
+## Example Script
+
+### Offline Inference
+
+Use python scripts under:
+
+- `examples/offline_inference/text_to_video/text_to_video.py`
+- `examples/offline_inference/image_to_video/image_to_video.py`
+
+Text-to-video example:
+
+```bash
+python examples/offline_inference/text_to_video/text_to_video.py \
+--model=Wan-AI/Wan2.2-TI2V-5B-Diffusers \
+--width=1280 \
+--height=704 \
+--guidance-scale=5.0 \
+--prompt="Two anthropomorphic cats in comfy boxing gear and bright gloves fight intensely on a spotlighted stage" \
+--output=t2v_5B_pp2.mp4 \
+--pipeline-parallel-size=2
+```
+
+Pipeline Parallelism can also be combined with CFG-Parallel:
+
+```bash
+python examples/offline_inference/text_to_video/text_to_video.py \
+--model=Wan-AI/Wan2.2-TI2V-5B-Diffusers \
+--width=1280 \
+--height=704 \
+--guidance-scale=5.0 \
+--prompt="Two anthropomorphic cats in comfy boxing gear and bright gloves fight intensely on a spotlighted stage" \
+--output=t2v_5B_pp2_cfg2.mp4 \
+--pipeline-parallel-size=2 \
+--cfg-parallel-size=2
+```
+
+### Online Serving
+
+Enable Pipeline Parallelism in online serving:
+
+```bash
+# Default PP configuration
+vllm serve Wan-AI/Wan2.2-TI2V-5B-Diffusers --omni --port 8091 --pipeline-parallel-size 2
+
+# PP + CFG-Parallel
+vllm serve Wan-AI/Wan2.2-TI2V-5B-Diffusers --omni --port 8091 \
+  --pipeline-parallel-size 2 \
+  --cfg-parallel-size 2
+```
+
+---
+
+## Configuration Parameters
+
+In `DiffusionParallelConfig`
+
+| Parameter                | Type | Default | Description                                                                                                      |
+|--------------------------|------|---------|------------------------------------------------------------------------------------------------------------------|
+| `pipeline_parallel_size` | int  | 1       | Number of pipeline-parallel stages. Set to a value greater than 1 to split the denoising transformer across GPUs |
+
+> [!NOTE]
+> Total GPU count is the product of all enabled distributed dimensions, for example
+`pipeline_parallel_size * cfg_parallel_size * tensor_parallel_size * ulysses_degree * ring_degree`.
+
+### Manual Layer Partitioning
+
+By default, transformer layers are distributed evenly across PP ranks. You can override this with the
+`VLLM_PP_LAYER_PARTITION` environment variable to assign a specific number of layers to each rank:
+
+```bash
+# Example: 40 layers across 4 PP ranks, assigning 8 / 12 / 12 / 8 layers
+export VLLM_PP_LAYER_PARTITION=8,12,12,8
+```
+
+The value must be a comma-separated list of integers whose length equals `pipeline_parallel_size` and whose sum equals
+the total number of transformer layers. This is useful when you want to balance memory or compute asymmetrically across
+ranks.
+
+
+---
+
+## Best Practices
+
+### When to Use
+
+**Good for:**
+
+- Large diffusion transformers that do not fit comfortably on one GPU
+- Multi-GPU setups where reducing per-GPU model memory is more important than minimizing communication
+- Combining with CFG-Parallel or other distributed methods on supported models
+
+**Not for:**
+
+- Single GPU setups
+- Models that do not support Pipeline Parallelism
+  (check [supported models](../../diffusion_features.md#supported-models))
+- Very small models where inter-stage communication overhead may outweigh the benefit
+
+### Expected Behavior
+
+Pipeline Parallelism primarily reduces per-GPU memory usage by splitting the transformer into stage-local blocks.
+Depending on the model, topology, and resolution, it may also help execution fit into available hardware, but it is not
+primarily a latency optimization.
+
+---
+
+## Troubleshooting
+
+### Common Issue 1: No benefit from Pipeline Parallelism
+
+**Symptoms**: PP is enabled, but latency does not improve or becomes slightly worse.
+
+**Solutions**:
+
+1. **Check your goal:**
+
+```python
+# PP is mainly for memory scaling, not guaranteed latency speedup
+parallel_config = DiffusionParallelConfig(pipeline_parallel_size=2)
+```
+
+2. **Check model support:**
+    - Verify your model in [supported models](../../diffusion_features.md#supported-models)
+    - PP is currently validated only on selected pipelines
+
+3. **Combine with other methods when appropriate:**
+    - PP can be combined with CFG-Parallel, Tensor Parallelism, or Sequence Parallelism on supported models
+
+### Common Issue 2: PP pipeline fails at import
+
+**Symptoms**: Importing a custom pipeline raises a `TypeError` about `CFGParallelMixin` or mixin order.
+
+**Solutions**:
+
+1. Inherit both mixins.
+2. Put `PipelineParallelMixin` before `CFGParallelMixin` in the class base list.
+3. Use `class YourPipeline(nn.Module, PipelineParallelMixin, CFGParallelMixin): ...` as the reference pattern.
+
+---
+
+## Summary
+
+1. ✅ **Enable Pipeline Parallelism** - Set `pipeline_parallel_size > 1` in `DiffusionParallelConfig`
+2. ✅ **Use Supported Models** - Verify your model supports PP in
+   [supported models](../../diffusion_features.md#supported-models)
+3. ✅ **Combine When Needed** - PP can be combined with CFG-Parallel and other distributed methods on supported pipelines
+4. ✅ **Scale for Memory** - Use PP primarily to reduce per-GPU model memory and fit larger transformers

docs/user_guide/diffusion/step_execution.md

@@ -60,6 +60,9 @@ batching only becomes relevant when `--max-num-seqs > 1`.
 - `cache_backend` is not supported together with step execution.
 - Unsupported pipelines fail early during model loading.
 - Request-mode extras such as KV transfer are not wired into step mode yet.
+- LoRA is supported in step mode, but each batch must use a single adapter:
+  requests with different `lora_request` or `lora_scale` are scheduled into
+  separate batches.
 
 ## When To Use It
 

docs/user_guide/diffusion_features.md

@@ -15,7 +15,7 @@ vLLM-Omni supports various advanced features for diffusion models:
 - Acceleration: **cache methods**, **parallelism methods**, **startup optimizations**
 - Memory optimization: **cpu offloading**, **quantization**
 - Extensions: **LoRA inference**, **frame interpolation**
-- Execution modes: **step execution**, **multi-replica serving**
+- Execution modes: **step execution**
 
 ## Supported Features
 
@@ -35,15 +35,15 @@ Cache methods trade minimal quality for significant speedup. Quality loss is typ
 
 Parallelism methods distribute computation across GPUs without quality loss (mathematically equivalent to single-GPU).
 
-| Method | Description | Best For |
-|--------|-------------|----------|
-| **[Ulysses-SP](diffusion/parallelism/sequence_parallel.md)** | Sequence parallelism via all-to-all communication | High-resolution images (>1536px) or long videos with 2-8 GPUs |
-| **[Ring-Attention](diffusion/parallelism/sequence_parallel.md)** | Sequence parallelism via ring-based communication | Videos, very long sequences, memory-constrained, with 2-8 GPUs |
-| **[CFG-Parallel](diffusion/parallelism/cfg_parallel.md)** | Splits CFG positive/negative branches across devices | Image editing with CFG guidance (true_cfg_scale > 1) on 2 GPUs |
-| **[Tensor Parallelism](diffusion/parallelism/tensor_parallel.md)** | Shards model weights across devices | Large models that don't fit in single GPU, with 2+ GPUs |
-| **[HSDP](diffusion/parallelism/hsdp.md)** | Weight sharding via FSDP2, redistributed on-demand at runtime | Very large models (14B+) on limited VRAM, combinable with SP |
-| **[Expert Parallelism](diffusion/parallelism/expert_parallel.md)** | Shards MoE expert MLP blocks across devices | MoE diffusion models (e.g., HunyuanImage3.0) |
-| **[Multi-Replica Serving](diffusion/multi_replica_serving.md)** | Runs multiple independent diffusion stage replicas and routes requests across them | Online serving throughput with many concurrent requests |
+| Method                                                                 | Description                                                              | Best For                                                          |
+|------------------------------------------------------------------------|--------------------------------------------------------------------------|-------------------------------------------------------------------|
+| **[Ulysses-SP](diffusion/parallelism/sequence_parallel.md)**           | Sequence parallelism via all-to-all communication                        | High-resolution images (>1536px) or long videos with 2-8 GPUs     |
+| **[Ring-Attention](diffusion/parallelism/sequence_parallel.md)**       | Sequence parallelism via ring-based communication                        | Videos, very long sequences, memory-constrained, with 2-8 GPUs    |
+| **[CFG-Parallel](diffusion/parallelism/cfg_parallel.md)**              | Splits CFG positive/negative branches across devices                     | Image editing with CFG guidance (true_cfg_scale > 1) on 2 GPUs    |
+| **[Tensor Parallelism](diffusion/parallelism/tensor_parallel.md)**     | Shards model weights across devices                                      | Large models that don't fit in single GPU, with 2+ GPUs           |
+| **[Pipeline Parallelism](diffusion/parallelism/pipeline_parallel.md)** | Splits the denoising transformer block-wise across sequential GPU stages | Large diffusion transformers that need lower per-GPU model memory |
+| **[HSDP](diffusion/parallelism/hsdp.md)**                              | Weight sharding via FSDP2, redistributed on-demand at runtime            | Very large models (14B+) on limited VRAM, combinable with SP      |
+| **[Expert Parallelism](diffusion/parallelism/expert_parallel.md)**     | Shards MoE expert MLP blocks across devices                              | MoE diffusion models (e.g., HunyuanImage3.0)                      |
 
 #### Startup Optimization
 
@@ -106,31 +106,33 @@ The following tables show which models support each feature:
 
 ### ImageGen
 
-| Model | ⚡TeaCache | ⚡Cache-DiT | 🔀SP (Ulysses & Ring) | 🔀CFG-Parallel | 🔀Tensor-Parallel | 🔀HSDP | 💾CPU Offload (Layerwise) | 💾VAE-Patch-Parallel | 💾Quantization | 🔄Step Execution |
-|-------|:----------:|:-----------:|:---------------------:|:--------------:|:-----------------:|:------:|:------------------------:|:--------------------:|:--------------:|:----------------:|
-| **Bagel** | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ | ✅  | ❌ | ❌ | ❌ |
-| **FLUX.1-dev** | ✅ | ✅ | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ | ✅ | ❌ |
-| **FLUX.1-schnell** | ❌ | ✅ | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ | ✅ | ❌ |
-| **FLUX.2-klein** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ | ❌ | ✅ | ❌ |
-| **FLUX.1-Kontext-dev** | ❌ | ❌ | ❌ | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ |
-| **FLUX.2-dev** | ✅ | ✅ | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ |
-| **GLM-Image** | ❌ | ❌ | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ |
-| **HunyuanImage3** | ❌ | ✅ | ❌ | ❌ | ✅ | ❌ | ❌ | ❌ | ✅ | ❌ |
-| **LongCat-Image** | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ | ❌ | ❌ | ❌ |
-| **LongCat-Image-Edit** | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ | ❌ | ❌ | ❌ |
-| **MagiHuman** | ❌ | ❌ | ❌ | ❓ | ✅ | ❌ | ✅ | ❌ | ❌ | ❌ |
-| **MammothModa2(T2I)** | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ |
-| **Nextstep_1(T2I)** | ❓ | ❓ | ❌ | ✅ | ✅ | ❌ | ✅ | ❌ | ❌ | ❌ |
-| **OmniGen2** | ❌ | ✅ | ❌ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ |
-| **Ovis-Image** | ❌ | ✅ | ❌ | ✅ | ❌ | ❌ | ✅ | ❌ | ❌ | ❌ |
-| **Qwen-Image** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ (decode) | ✅ | ✅ |
-| **Qwen-Image-2512** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ (decode) | ✅ | ✅ |
-| **Qwen-Image-Edit** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ (decode) | ❌ | ❌ |
-| **Qwen-Image-Edit-2509** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ (decode) | ✅ | ❌ | ❌ |
-| **Qwen-Image-Layered** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ (decode) | ❌ | ❌ |
-| **Stable-Diffusion3.5** | ❌ | ✅ | ❌ | ✅ | ✅ | ❌ | ✅ | ✅ (decode) | ❌ | ❌ |
-| **Z-Image** | ✅ | ✅ | ✅ | ❓ | ✅ (TP=2 only) | ✅ | ❌ | ✅ (decode) | ✅ | ❌ |
-| **ERNIE-Image** | ❌ | ✅ | ✅ | ❓ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| Model                    | ⚡TeaCache | ⚡Cache-DiT | 🔀SP (Ulysses & Ring) | 🔀CFG-Parallel | 🔀Tensor-Parallel | 🔀Pipeline-Parallel | 🔀HSDP | 💾CPU Offload (Layerwise) | 💾VAE-Patch-Parallel | 💾Quantization | 🔄Step Execution |
+|--------------------------|:---------:|:----------:|:---------------------:|:--------------:|:-----------------:|:-------------------:|:------:|:-------------------------:|:--------------------:|:--------------:|:----------------:|
+| **Bagel**                |     ✅     |     ✅      |           ✅           |       ✅        |         ✅         |          ❌          |   ✅    |             ✅             |          ❌           |       ❌        |        ❌         |
+| **FLUX.1-dev**           |     ✅     |     ✅      |           ❌           |       ✅        |         ✅         |          ❌          |   ✅    |             ❌             |          ❌           |       ✅        |        ❌         |
+| **FLUX.1-schnell**       |     ❌     |     ✅      |           ❌           |       ✅        |         ✅         |          ❌          |   ✅    |             ❌             |          ❌           |       ✅        |        ❌         |
+| **FLUX.2-klein**         |     ✅     |     ✅      |           ✅           |       ✅        |         ✅         |          ❌          |   ✅    |             ❌             |          ❌           |       ✅        |        ❌         |
+| **FLUX.1-Kontext-dev**   |     ❌     |     ❌      |           ❌           |       ❌        |         ✅         |          ❌          |   ✅    |             ❌             |          ❌           |       ❌        |        ❌         |
+| **FLUX.2-dev**           |     ✅     |     ✅      |           ❌           |       ✅        |         ✅         |          ❌          |   ✅    |             ❌             |          ❌           |       ❌        |        ❌         |
+| **GLM-Image**            |     ❌     |     ❌      |           ❌           |       ✅        |         ✅         |          ❌          |   ✅    |             ❌             |          ❌           |       ❌        |        ❌         |
+| **Hidream-I1-Full**        |     ❌     |     ❌      |           ❌           |       ❌        |         ✅         |          ❌          |   ❌    |             ❌             |          ❌           |       ❌        |        ❌         |
+| **HunyuanImage3**        |     ❌     |     ✅      |           ❌           |       ❌        |         ✅         |          ❌          |   ❌    |             ❌             |          ❌           |       ✅        |        ❌         |
+| **LongCat-Image**        |     ✅     |     ✅      |           ✅           |       ✅        |         ✅         |          ❌          |   ❌    |             ✅             |          ❌           |       ❌        |        ❌         |
+| **LongCat-Image-Edit**   |     ✅     |     ✅      |           ✅           |       ✅        |         ✅         |          ❌          |   ❌    |             ✅             |          ❌           |       ❌        |        ❌         |
+| **MagiHuman**            |     ❌     |     ❌      |           ❌           |       ❓        |         ✅         |          ❌          |   ❌    |             ✅             |          ❌           |       ❌        |        ❌         |
+| **MammothModa2(T2I)**    |     ❌     |     ❌      |           ❌           |       ❌        |         ❌         |          ❌          |   ❌    |             ❌             |          ❌           |       ❌        |        ❌         |
+| **Nextstep_1(T2I)**      |     ❓     |     ❓      |           ❌           |       ✅        |         ✅         |          ❌          |   ❌    |             ✅             |          ❌           |       ❌        |        ❌         |
+| **OmniGen2**             |     ❌     |     ✅      |           ❌           |       ❌        |         ✅         |          ❌          |   ❌    |             ❌             |          ❌           |       ❌        |        ❌         |
+| **Ovis-Image**           |     ❌     |     ✅      |           ❌           |       ✅        |         ❌         |          ❌          |   ❌    |             ✅             |          ❌           |       ❌        |        ❌         |
+| **Qwen-Image**           |     ✅     |     ✅      |           ✅           |       ✅        |         ✅         |          ❌          |   ✅    |             ✅             |      ✅ (decode)      |       ✅        |        ✅         |
+| **Qwen-Image-2512**      |     ✅     |     ✅      |           ✅           |       ✅        |         ✅         |          ❌          |   ✅    |             ✅             |      ✅ (decode)      |       ✅        |        ✅         |
+| **Qwen-Image-Edit**      |     ✅     |     ✅      |           ✅           |       ✅        |         ✅         |          ❌          |   ✅    |             ✅             |      ✅ (decode)      |       ❌        |        ❌         |
+| **Qwen-Image-Edit-2509** |     ✅     |     ✅      |           ✅           |       ✅        |         ✅         |          ❌          |   ✅    |        ✅ (decode)         |          ✅           |       ❌        |        ❌         |
+| **Qwen-Image-Layered**   |     ✅     |     ✅      |           ✅           |       ✅        |         ✅         |          ❌          |   ✅    |             ✅             |      ✅ (decode)      |       ❌        |        ❌         |
+| **SenseNova-U1**         |     ❌     |     ❌      |           ❌           |       ❌        |         ✅         |          ❌          |   ❌    |             ✅             |          ❌           |       ❌        |        ❌         |
+| **Stable-Diffusion3.5**  |     ❌     |     ✅      |           ❌           |       ✅        |         ✅         |          ❌          |   ❌    |             ✅             |      ✅ (decode)      |       ❌        |        ❌         |
+| **Z-Image**              |     ✅     |     ✅      |           ✅           |       ❓        |   ✅ (TP=2 only)   |          ❌          |   ✅    |             ❌             |      ✅ (decode)      |       ✅        |        ❌         |
+| **ERNIE-Image**          |     ❌     |     ✅      |           ✅           |       ❓        |         ✅         |          ❌          |   ✅    |             ✅             |          ❌           |       ❌        |        ❌         |
 
 > Notes:
 > 1. Nextstep_1(T2I) does not support cache acceleration methods such as TeaCache or Cache-DiT.
@@ -138,15 +140,15 @@ The following tables show which models support each feature:
 
 ### VideoGen
 
-| Model | ⚡TeaCache | ⚡Cache-DiT | 🔀SP (Ulysses & Ring) | 🔀CFG-Parallel | 🔀Tensor-Parallel | 🔀HSDP | 💾CPU Offload (Layerwise) | 💾VAE-Patch-Parallel | 💾Quantization | 🔄Step Execution |
-|-------|:----------:|:-----------:|:---------------------:|:--------------:|:-----------------:|:------:|:------------------------:|:--------------------:|:--------------:|:----------------:|
-| **Wan2.2** | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ (encode/decode) | ❌ | ❌ |
-| **Wan2.1-VACE** | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ (decode) | ❌ | ❌ |
-| **LTX-2** | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
-| **LTX-2.3** | ❌ | ✅ | ✅ | ❌ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ |
-| **Helios** | ❌ | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
-| **HunyuanVideo-1.5 T2V I2V** | ❌ | ✅ | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ (decode) | ✅ | ❌ |
-| **DreamID-Omni** | ❌ | ❌ | ❌ | ✅ | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| Model                        | ⚡TeaCache | ⚡Cache-DiT | 🔀SP (Ulysses & Ring) | 🔀CFG-Parallel | 🔀Tensor-Parallel | Pipeline-Parallel | 🔀HSDP | 💾CPU Offload (Layerwise) | 💾VAE-Patch-Parallel | 💾Quantization | 🔄Step Execution |
+|------------------------------|:---------:|:----------:|:---------------------:|:--------------:|:-----------------:|:-----------------:|:------:|:-------------------------:|:--------------------:|:--------------:|:----------------:|
+| **Wan2.2**                   |     ❌     |     ✅      |           ✅           |       ✅        |         ✅         |         ✅         |   ✅    |             ✅             |  ✅ (encode/decode)   |       ❌        |        ❌         |
+| **Wan2.1-VACE**              |     ❌     |     ✅      |           ✅           |       ✅        |         ✅         |         ❌         |   ✅    |             ✅             |      ✅ (decode)      |       ❌        |        ❌         |
+| **LTX-2**                    |     ❌     |     ✅      |           ✅           |       ✅        |         ✅         |         ❌         |   ✅    |             ✅             |          ❌           |       ❌        |        ❌         |
+| **LTX-2.3**                  |     ❌     |     ✅      |           ✅           |       ❌        |         ✅         |         ❌         |   ❌    |             ❌             |          ❌           |       ❌        |        ❌         |
+| **Helios**                   |     ❌     |     ✅      |           ✅           |       ✅        |         ✅         |         ❌         |   ✅    |             ✅             |          ❌           |       ❌        |        ❌         |
+| **HunyuanVideo-1.5 T2V I2V** |     ❌     |     ✅      |           ❌           |       ✅        |         ✅         |         ❌         |   ✅    |             ✅             |      ✅ (decode)      |       ✅        |        ❌         |
+| **DreamID-Omni**             |     ❌     |     ❌      |           ❌           |       ✅        |         ❌         |         ❌         |   ✅    |             ✅             |          ❌           |       ❌        |        ❌         |
 
 **Frame Interpolation Support**
 
@@ -155,9 +157,9 @@ The following tables show which models support each feature:
 
 ### AudioGen
 
-| Model | ⚡TeaCache | ⚡Cache-DiT | 🔀SP (Ulysses & Ring) | 🔀CFG-Parallel | 🔀Tensor-Parallel | 🔀HSDP | 💾CPU Offload (Layerwise) | 💾VAE-Patch-Parallel | 💾Quantization | 🔄Step Execution |
-|-------|:----------:|:-----------:|:---------------------:|:--------------:|:-----------------:|:------:|:------------------------:|:--------------------:|:--------------:|:----------------:|
-| **Stable-Audio-Open** | ✅ | ❌ | ❓ | ❓ | ❌ | ✅ | ✅ | ❌ | ✅ | ❌ |
+| Model                 | ⚡TeaCache | ⚡Cache-DiT | 🔀SP (Ulysses & Ring) | 🔀CFG-Parallel | 🔀Tensor-Parallel | 🔀Pipeline-Parallel | 🔀HSDP | 💾CPU Offload (Layerwise) | 💾VAE-Patch-Parallel | 💾Quantization | 🔄Step Execution |
+|-----------------------|:---------:|:----------:|:---------------------:|:--------------:|:-----------------:|:-------------------:|:------:|:-------------------------:|:--------------------:|:--------------:|:----------------:|
+| **Stable-Audio-Open** |     ✅     |     ❌      |           ❓           |       ❓        |         ❌         |          ❌          |   ✅    |             ✅             |          ❌           |       ✅        |        ❌         |
 
 
 ## Feature Compatibility
@@ -183,7 +185,7 @@ The following tables show which models support each feature:
 | **💾VAE Patch Parallel** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ | ❌ | | | | |
 | **💾FP8 Quant** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ❓ | ❓ | ✅ | ✅ | ✅ | | | |
 | **🔧LoRA Inference** | ❓ | ❓ | ❓ | ❓ | ❓ | ❓ | ❓ | ❓ | ❓ | ❓ | ❓ | ❓ | | |
-| **🔄Step Execution** | ❌ | ❌ | ✅ | ✅ | ✅ | ✅ | ❓ | ❓ | ✅ | ❓ | ✅ | ✅ | ❌ | |
+| **🔄Step Execution** | ❌ | ❌ | ✅ | ✅ | ✅ | ✅ | ❓ | ❓ | ✅ | ❓ | ✅ | ✅ | ✅ | |
 
 !!! info
 
@@ -192,7 +194,7 @@ The following tables show which models support each feature:
     3. CPU Offloading (Layerwise) and CPU Offloading (Module-wise) are not compatible.
     4. CPU Offloading (Layerwise) supports single-card for now.
     5. Using FP8-Quant as an example of qunatization methods.
-    6. Step Execution is not compatible with cache backends (TeaCache, Cache-DiT) or LoRA.
+    6. Step Execution is not compatible with cache backends (TeaCache, Cache-DiT). LoRA is supported, but each scheduled batch must use a single adapter (requests with different `lora_request` or `lora_scale` are kept in separate batches).
 
 
 ## Multi-Thread Weight Loading
@@ -257,7 +259,7 @@ Measured on NVIDIA H800:
 
 **Parallelism Methods:**
 
-- **[Parallelism Overview](diffusion/parallelism/overview.md)** - Tensor Parallelism, Sequence Parallelism, CFG Parallelism, HSDP, and Expert Parallelism
+- **[Parallelism Overview](diffusion/parallelism/overview.md)** - Tensor Parallelism, Sequence Parallelism, CFG Parallelism, Pipeline Parallelism, HSDP, and Expert Parallelism
 
 **Memory Optimization:**
 

docs/user_guide/examples/offline_inference/text_to_speech.md

@@ -17,9 +17,9 @@ list of supported architectures across all modalities, see
 | Model | HuggingFace repo | Stages | Voice cloning | Streaming | Special modes | Sample rate |
 |---|---|---|---|---|---|---|
 | VoxCPM2 | `openbmb/VoxCPM2` | single (native AR) | ✓ | — | continuation (`--ref-audio` + `--ref-text`) | 48 kHz |
-| VoxCPM | local model dir | split | ✓ | ✓ (`voxcpm_async_chunk.yaml`) | — | 24 kHz |
 | CosyVoice3 | `FunAudioLLM/Fun-CosyVoice3-0.5B-2512` | 2 (talker + code2wav) | ✓ | ✓ (`async_chunk: true` default) | — | 22.05 kHz |
 | Fish Speech S2 Pro | `fishaudio/s2-pro` | dual-AR | ✓ | ✓ (`--streaming`) | — | 44.1 kHz |
+| GLM-TTS | `zai-org/GLM-TTS` | 2 (AR + DiT) | ✓ (required) | ✓ | — | 24 kHz |
 | OmniVoice | `k2-fsa/OmniVoice` | 2 (gen + dec) | ✓ | — | voice design (`--instruct`), language (`--lang`) | 24 kHz |
 | Qwen3-TTS | `Qwen/Qwen3-TTS-12Hz-1.7B-{CustomVoice,VoiceDesign,Base}` | 2 (talker + code2wav) | ✓ (Base) | ✓ | 3 task variants (`--query-type`) | 24 kHz |
 | Voxtral TTS | `mistralai/Voxtral-4B-TTS-2603` | varies | ✓ | ✓ | voice presets (`--voice`) | 24 kHz |
@@ -72,61 +72,6 @@ python examples/offline_inference/text_to_speech/voxcpm2/end2end.py \
 
 ---
 
-## VoxCPM
-
-Split-stage TTS. The hub example covers single TTS, single voice cloning, and streaming. Use `benchmarks/voxcpm/` for warmup, batch JSONL prompts, profiler injection, and offline TTFP / RTF measurement.
-
-### Prerequisites
-```bash
-pip install voxcpm soundfile
-# or use a local source tree:
-export VLLM_OMNI_VOXCPM_CODE_PATH=/path/to/VoxCPM/src
-```
-
-If the native VoxCPM `config.json` does not contain HF metadata such as `model_type`, prepare a persistent HF-compatible config directory and point the stage configs to it via `VLLM_OMNI_VOXCPM_HF_CONFIG_PATH`:
-
-```bash
-export VOXCPM_MODEL=/path/to/voxcpm-model
-export VLLM_OMNI_VOXCPM_HF_CONFIG_PATH=/tmp/voxcpm_hf_config
-mkdir -p "$VLLM_OMNI_VOXCPM_HF_CONFIG_PATH"
-cp "$VOXCPM_MODEL/config.json" "$VLLM_OMNI_VOXCPM_HF_CONFIG_PATH/config.json"
-cp "$VOXCPM_MODEL/generation_config.json" "$VLLM_OMNI_VOXCPM_HF_CONFIG_PATH/generation_config.json" 2>/dev/null || true
-python3 -c 'import json, os; p=os.path.join(os.environ["VLLM_OMNI_VOXCPM_HF_CONFIG_PATH"], "config.json"); cfg=json.load(open(p, "r", encoding="utf-8")); cfg["model_type"]="voxcpm"; cfg.setdefault("architectures", ["VoxCPMForConditionalGeneration"]); json.dump(cfg, open(p, "w", encoding="utf-8"), indent=2, ensure_ascii=False)'
-```
-
-### Quick start
-```bash
-python examples/offline_inference/text_to_speech/voxcpm/end2end.py \
-    --model "$VOXCPM_MODEL" \
-    --text "This is a split-stage VoxCPM synthesis example running on vLLM Omni."
-```
-
-### Voice cloning
-```bash
-python examples/offline_inference/text_to_speech/voxcpm/end2end.py \
-    --model "$VOXCPM_MODEL" \
-    --text "This sentence is synthesized with a cloned voice." \
-    --ref-audio /path/to/reference.wav \
-    --ref-text  "The exact transcript spoken in reference.wav."
-```
-
-### Streaming
-Pass the async-chunk stage config:
-```bash
-python examples/offline_inference/text_to_speech/voxcpm/end2end.py \
-    --model "$VOXCPM_MODEL" \
-    --stage-configs-path vllm_omni/model_executor/stage_configs/voxcpm_async_chunk.yaml \
-    --text "This is a split-stage VoxCPM streaming example running on vLLM Omni."
-```
-
-### Notes
-- `voxcpm.yaml` is the default non-streaming stage config; `voxcpm_async_chunk.yaml` enables streaming.
-- Streaming is currently single-request oriented.
-- `--ref-text` must be the real transcript of `--ref-audio`; mismatched text degrades quality.
-- For online serving, see [`examples/online_serving/voxcpm`](https://github.com/vllm-project/vllm-omni/tree/main/examples/online_serving/voxcpm/README.md). For benchmark reporting, see [`benchmarks/voxcpm`](https://github.com/vllm-project/vllm-omni/tree/main/benchmarks/voxcpm/README.md).
-
----
-
 ## CosyVoice3
 
 2-stage TTS pipeline (`talker` + `code2wav`) at 22.05 kHz.
@@ -214,6 +159,35 @@ Streaming requires `async_chunk: true` in the stage config.
 
 ---
 
+## GLM-TTS
+
+2-stage TTS pipeline (AR + DiT flow-matching) at 24 kHz. Every request requires reference audio and its transcript for zero-shot voice cloning.
+
+### Quick start
+```bash
+python examples/offline_inference/text_to_speech/glm_tts/end2end.py \
+    --model zai-org/GLM-TTS \
+    --text "你好，这是语音合成测试。" \
+    --ref-audio /path/to/reference.wav \
+    --ref-text "这是参考音频的文本内容。" \
+    --output-dir ./output
+```
+
+### Architecture
+```
+Text → [Stage 0: AR] → Speech Tokens → [Stage 1: DiT + HiFT] → Audio (24 kHz)
+        (Llama-based)    (32k vocab)      (Flow Matching)
+```
+
+### Notes
+- `--ref-audio` and `--ref-text` are **required** together; GLM-TTS does not support text-only synthesis.
+- Reference audio should be 3-10 seconds.
+- First run may be slow due to lazy loading of WhisperVQ tokenizer and CampPlus ONNX speaker embedder.
+- Default sampling: temperature=1.0, top_k=25, top_p=0.8 (RAS method).
+- The `--model` path should point to the repository root (not `llm/` subdirectory).
+
+---
+
 ## OmniVoice
 
 Zero-shot multilingual TTS supporting 600+ languages, with three modes (auto / clone / design).
@@ -369,6 +343,10 @@ Available voice presets are listed on the HF model card (`mistralai/Voxtral-4B-T
     ``````py
     --8<-- "examples/offline_inference/text_to_speech/fish_speech/end2end.py"
     ``````
+??? abstract "glm_tts/end2end.py"
+    ``````py
+    --8<-- "examples/offline_inference/text_to_speech/glm_tts/end2end.py"
+    ``````
 ??? abstract "omnivoice/end2end.py"
     ``````py
     --8<-- "examples/offline_inference/text_to_speech/omnivoice/end2end.py"
@@ -381,10 +359,6 @@ Available voice presets are listed on the HF model card (`mistralai/Voxtral-4B-T
     ``````py
     --8<-- "examples/offline_inference/text_to_speech/qwen3_tts/end2end.py"
     ``````
-??? abstract "voxcpm/end2end.py"
-    ``````py
-    --8<-- "examples/offline_inference/text_to_speech/voxcpm/end2end.py"
-    ``````
 ??? abstract "voxcpm2/end2end.py"
     ``````py
     --8<-- "examples/offline_inference/text_to_speech/voxcpm2/end2end.py"

docs/user_guide/examples/online_serving/glm_image.md

@@ -101,7 +101,7 @@ guides.
 
 When using `/v1/chat/completions`, pass these inside `extra_body` in the curl
 JSON, or via the `extra_body` keyword argument in the OpenAI Python SDK (see the
-[Diffusion Chat API guide](../../../serving/diffusion_chat_api.md)).
+[Chat Completions API guide](../../../serving/chat_completions_api.md)).
 When using the dedicated [`/v1/images/generations`](../../../serving/image_generation_api.md)
 or [`/v1/images/edits`](../../../serving/image_edit_api.md) endpoints, pass
 the supported generation controls as top-level fields directly. For image

docs/user_guide/examples/online_serving/image_to_image.md

@@ -208,7 +208,7 @@ Wrap generation parameters inside `extra_body` in the request JSON:
     ```
 
     For details on how generation parameters are handled across different clients, see the
-    [Diffusion Chat API guide](../../../../serving/diffusion_chat_api.md).
+    [Chat Completions API guide](../../../../serving/chat_completions_api.md).
 
 ### Layered Image Generation (Qwen-Image-Layered)
 
@@ -361,7 +361,7 @@ Provide multiple images in `content` (order matters):
 
 When using `/v1/chat/completions`, pass these inside `extra_body` in the curl
 JSON, or via the `extra_body` keyword argument in the OpenAI Python SDK (see the
-[Diffusion Chat API guide](../../../../serving/diffusion_chat_api.md)).
+[Chat Completions API guide](../../../../serving/chat_completions_api.md)).
 When using the dedicated [`/v1/images/edits`](../../../../serving/image_edit_api.md)
 endpoint, pass the supported generation controls as top-level form fields
 directly. For image dimensions and count, use `size` and `n` rather than

docs/user_guide/examples/online_serving/text_to_image.md

@@ -216,7 +216,7 @@ Wrap generation parameters inside `extra_body` in the request JSON:
     ```
 
     For details on how generation parameters are handled across different clients, see the
-    [Diffusion Chat API guide](../../../../serving/diffusion_chat_api.md).
+    [Chat Completions API guide](../../../../serving/chat_completions_api.md).
 
 ### Multimodal Input (Text + Structured Content)
 
@@ -237,7 +237,7 @@ Wrap generation parameters inside `extra_body` in the request JSON:
 
 When using `/v1/chat/completions`, pass these inside `extra_body` in the curl
 JSON, or via the `extra_body` keyword argument in the OpenAI Python SDK (see the
-[Diffusion Chat API guide](../../../../serving/diffusion_chat_api.md)).
+[Chat Completions API guide](../../../../serving/chat_completions_api.md)).
 When using the dedicated [`/v1/images/generations`](../../../../serving/image_generation_api.md)
 endpoint, pass the supported generation controls as top-level JSON fields
 directly. For image dimensions and count, use `size` and `n` rather than

docs/user_guide/examples/online_serving/text_to_speech.md

@@ -17,14 +17,15 @@ For the full list of supported architectures across all modalities, see
 
 | Model | HuggingFace repo | Voice cloning | Streaming | Voice presets / upload | Gradio demo |
 |---|---|---|---|---|---|
+| CosyVoice3 | `FunAudioLLM/Fun-CosyVoice3-0.5B-2512` | ✓ (`ref_audio`+`ref_text`) | ✓ (PCM stream) | — | — |
 | Fish Speech S2 Pro | `fishaudio/s2-pro` | ✓ (`ref_audio`+`ref_text`) | ✓ (PCM stream) | — | ✓ |
+| GLM-TTS | `zai-org/GLM-TTS` | ✓ (`ref_audio`+`ref_text`, required) | ✓ (PCM stream) | — | ✓ |
 | OmniVoice | `k2-fsa/OmniVoice` | (offline only) | — | — | — |
 | Qwen3-TTS | `Qwen/Qwen3-TTS-12Hz-1.7B-{CustomVoice,VoiceDesign,Base}` | ✓ (Base) | ✓ (PCM + WebSocket) | ✓ (presets + `/v1/audio/voices` upload) | ✓ (standard + FastRTC) |
-| VoxCPM | local model dir | ✓ | ✓ (PCM stream) | — | — |
 | VoxCPM2 | `openbmb/VoxCPM2` | ✓ | ✓ (AudioWorklet via gradio) | — | ✓ |
 | Voxtral TTS | `mistralai/Voxtral-4B-TTS-2603` | ✓ (gated upstream) | ✓ | ✓ (presets) | ✓ |
 
-CosyVoice3 is intentionally absent: no online example exists for it yet. See its [offline section](https://github.com/vllm-project/vllm-omni/tree/main/examples/offline_inference/text_to_speech/README.md#cosyvoice3) instead.
+For offline inference of any of these models, see the [offline TTS hub](https://github.com/vllm-project/vllm-omni/tree/main/examples/offline_inference/text_to_speech/README.md).
 
 ## Common Quick Start
 
@@ -96,6 +97,54 @@ For full request-shape documentation (all parameters, response formats, error co
 
 ---
 
+## CosyVoice3
+
+2-stage TTS (`talker` + flow-matching `code2wav`) at 24 kHz. Voice cloning only — every request needs `ref_audio` + `ref_text`; there are no built-in voice presets.
+
+### Prerequisites
+```bash
+huggingface-cli download FunAudioLLM/Fun-CosyVoice3-0.5B-2512
+```
+
+If your downloaded checkpoint lacks `config.json`, add one with `{"model_type": "cosyvoice3", "architectures": ["CosyVoice3Model"]}` (the loader reads `model_type` to select the class).
+
+### Launch
+```bash
+vllm serve FunAudioLLM/Fun-CosyVoice3-0.5B-2512 --omni --port 8091 --trust-remote-code
+# or:
+./cosyvoice3/run_server.sh
+```
+
+Streaming is on by default via `async_chunk: true` in `vllm_omni/deploy/cosyvoice3.yaml`. Pass `--no-async-chunk` (or `NO_ASYNC_CHUNK=1 ./cosyvoice3/run_server.sh`) for the legacy synchronous path.
+
+### CLI client
+The client defaults to the official upstream zero-shot prompt, so it runs without extra flags:
+```bash
+cd examples/online_serving/text_to_speech/cosyvoice3
+python speech_client.py --text "收到好友从远方寄来的生日礼物。"
+```
+
+Pass your own reference clip and transcript for a different voice:
+```bash
+python speech_client.py --text "Hello, this is a cloned voice." \
+    --ref-audio /path/to/reference.wav \
+    --ref-text "Transcript of the reference audio."
+```
+
+Stream PCM instead of WAV:
+```bash
+python speech_client.py --text "Hello world" --stream --output output.pcm
+```
+
+The client supports `--api-base`, `--model`, `--text`, `--ref-audio`, `--ref-text`, `--response-format`, `--stream`, `--output`.
+
+### Notes
+- Stage 0 (`talker`) emits speech tokens; stage 1 (`code2wav`) runs flow matching + HiFiGAN to synthesize waveform.
+- Deploy config auto-loads from `vllm_omni/deploy/cosyvoice3.yaml` based on HF `model_type`. Pass `--deploy-config <path>` to override.
+- For offline inference and the end-to-end script, see the [offline CosyVoice3 section](https://github.com/vllm-project/vllm-omni/tree/main/examples/offline_inference/text_to_speech/README.md#cosyvoice3).
+
+---
+
 ## Fish Speech S2 Pro
 
 4B dual-AR TTS at 44.1 kHz. Server uses the DAC codec.
@@ -144,6 +193,45 @@ python fish_speech/gradio_demo.py --api-base http://localhost:8091  # if server
 
 ---
 
+## GLM-TTS
+
+2-stage TTS (AR + DiT flow-matching) at 24 kHz. Every request requires `ref_audio` + `ref_text`.
+
+### Launch
+```bash
+vllm serve zai-org/GLM-TTS --omni --trust-remote-code --port 8091
+# or:
+bash examples/online_serving/text_to_speech/glm_tts/run_server.sh /path/to/GLM-TTS
+```
+
+### Sending requests
+```bash
+# Voice cloning (required)
+python examples/online_serving/text_to_speech/glm_tts/openai_speech_client.py \
+    --text "你好，这是语音克隆测试。" \
+    --ref-audio file:///path/to/ref.wav \
+    --ref-text "这是参考音频的文本内容。"
+
+# Custom format
+python examples/online_serving/text_to_speech/glm_tts/openai_speech_client.py \
+    --text "Hello, this is a voice cloning test." \
+    --ref-audio file:///path/to/ref.wav \
+    --ref-text "Transcript of the reference audio." \
+    --response-format mp3 -o output.mp3
+```
+
+### Gradio demo
+```bash
+bash examples/online_serving/text_to_speech/glm_tts/run_gradio_demo.sh
+```
+
+### Notes
+- Output: 24 kHz mono WAV via HiFT vocoder.
+- `ref_audio` + `ref_text` are **required** together on every request. Reference audio should be 3-10 seconds.
+- Voice cloning feature extraction (WhisperVQ, CampPlus, mel) runs on the model side — no external dependency on the serving layer.
+
+---
+
 ## OmniVoice
 
 Zero-shot multilingual TTS (600+ languages). Online serving currently exposes **auto voice** only; voice cloning and voice design are available offline.
@@ -196,10 +284,10 @@ vllm serve Qwen/Qwen3-TTS-12Hz-1.7B-CustomVoice --omni --port 8091
 ./qwen3_tts/run_server.sh Base
 ```
 
-### Choosing an executor backend (uniproc vs mp)
-Stage configs ship with the chunked-streaming default. To use the uniproc executor (lower IPC overhead for the Base cloning task), pass `--stage-configs-path vllm_omni/model_executor/stage_configs/qwen3_tts_uniproc.yaml`. See [#2603](https://github.com/vllm-project/vllm-omni/issues/2603) and [#2604](https://github.com/vllm-project/vllm-omni/pull/2604) for the full investigation.
+### Executor backend
+Single-GPU serves now default to the uniproc executor (lower IPC overhead, the Base cloning use case from [#2603](https://github.com/vllm-project/vllm-omni/issues/2603) / [#2604](https://github.com/vllm-project/vllm-omni/pull/2604)). `vllm_omni/deploy/qwen3_tts.yaml` is the only Qwen3-TTS deploy config; pass `--deploy-config <path>` to override.
 
-To opt out of chunked streaming, pass `--no-async-chunk` instead — the pipeline auto-dispatches to the end-to-end codec processor.
+To opt out of chunked streaming, pass `--no-async-chunk` — the pipeline auto-dispatches to the end-to-end codec processor.
 
 ### Sending requests
 ```bash
@@ -281,71 +369,11 @@ python qwen3_tts/gradio_fastrtc_demo.py --api-base http://localhost:8000
 `qwen3_tts/batch_speech_client.py` issues many concurrent requests for throughput measurement.
 
 ### Notes
-- Base voice cloning has uniproc-vs-mp tradeoffs depending on per-request reference audio cost; see the executor-backend section above.
+- Base voice cloning has per-request reference-audio cost; the uniproc default keeps IPC overhead off the critical path. See the executor-backend section above for background.
 - `vllm_omni/deploy/qwen3_tts.yaml` is the default deploy config (loaded by HF `model_type`); per-stage runtime overrides are available via `--stage-N-<field> <value>`.
 
 ---
 
-## VoxCPM
-
-Split-stage TTS at 24 kHz.
-
-### Prerequisites
-```bash
-pip install voxcpm
-# or use a local source tree:
-export VLLM_OMNI_VOXCPM_CODE_PATH=/path/to/VoxCPM/src
-```
-
-If the native VoxCPM `config.json` lacks HF `model_type`, set up an HF-compatible config dir:
-```bash
-export VOXCPM_MODEL=/path/to/voxcpm-model
-export VLLM_OMNI_VOXCPM_HF_CONFIG_PATH=/tmp/voxcpm_hf_config
-mkdir -p "$VLLM_OMNI_VOXCPM_HF_CONFIG_PATH"
-cp "$VOXCPM_MODEL/config.json" "$VLLM_OMNI_VOXCPM_HF_CONFIG_PATH/config.json"
-cp "$VOXCPM_MODEL/generation_config.json" "$VLLM_OMNI_VOXCPM_HF_CONFIG_PATH/generation_config.json" 2>/dev/null || true
-python3 -c 'import json, os; p=os.path.join(os.environ["VLLM_OMNI_VOXCPM_HF_CONFIG_PATH"], "config.json"); cfg=json.load(open(p, "r", encoding="utf-8")); cfg["model_type"]="voxcpm"; cfg.setdefault("architectures", ["VoxCPMForConditionalGeneration"]); json.dump(cfg, open(p, "w", encoding="utf-8"), indent=2, ensure_ascii=False)'
-```
-
-### Launch
-```bash
-export VOXCPM_MODEL=/path/to/voxcpm-model
-./voxcpm/run_server.sh                # async-chunk streaming (default)
-./voxcpm/run_server.sh sync           # non-streaming
-```
-Or directly:
-```bash
-vllm serve "$VOXCPM_MODEL" \
-    --stage-configs-path vllm_omni/model_executor/stage_configs/voxcpm_async_chunk.yaml \
-    --trust-remote-code --enforce-eager --omni --port 8091
-```
-
-### Sending requests
-```bash
-# Basic TTS
-python voxcpm/openai_speech_client.py \
-    --model "$VOXCPM_MODEL" \
-    --text "This is a VoxCPM online text-to-speech example."
-
-# Voice cloning
-python voxcpm/openai_speech_client.py \
-    --model "$VOXCPM_MODEL" \
-    --text "This sentence is synthesized with a cloned voice." \
-    --ref-audio /path/to/reference.wav \
-    --ref-text "The exact transcript spoken in reference.wav."
-
-# Streaming PCM
-python voxcpm/openai_speech_client.py \
-    --model "$VOXCPM_MODEL" \
-    --text "This is a streaming VoxCPM request." \
-    --stream --output voxcpm_stream.pcm
-```
-
-### Notes
-- `voxcpm.yaml` for one-shot decode; `voxcpm_async_chunk.yaml` for single-request streaming. Do not use the async-chunk config for concurrent requests or `/v1/audio/speech/batch`.
-- Generic TTS fields not supported by VoxCPM: `voice`, `instructions`, `language`, `speaker_embedding`, `x_vector_only_mode`.
-- For benchmark measurement, see [`benchmarks/voxcpm`](https://github.com/vllm-project/vllm-omni/tree/main/benchmarks/voxcpm/README.md).
-
 ---
 
 ## VoxCPM2
@@ -407,6 +435,14 @@ The demo handles voice-preset selection and reference-audio upload. `voxtral_tts
 
 ## Example materials
 
+??? abstract "cosyvoice3/run_server.sh"
+
+    --8<-- "examples/online_serving/text_to_speech/cosyvoice3/run_server.sh"
+
+??? abstract "cosyvoice3/speech_client.py"
+
+    --8<-- "examples/online_serving/text_to_speech/cosyvoice3/speech_client.py"
+
 ??? abstract "fish_speech/gradio_demo.py"
     ``````py
     --8<-- "examples/online_serving/text_to_speech/fish_speech/gradio_demo.py"
@@ -423,6 +459,22 @@ The demo handles voice-preset selection and reference-audio upload. `voxtral_tts
     ``````py
     --8<-- "examples/online_serving/text_to_speech/fish_speech/speech_client.py"
     ``````
+??? abstract "glm_tts/gradio_demo.py"
+    ``````py
+    --8<-- "examples/online_serving/text_to_speech/glm_tts/gradio_demo.py"
+    ``````
+??? abstract "glm_tts/openai_speech_client.py"
+    ``````py
+    --8<-- "examples/online_serving/text_to_speech/glm_tts/openai_speech_client.py"
+    ``````
+??? abstract "glm_tts/run_gradio_demo.sh"
+    ``````sh
+    --8<-- "examples/online_serving/text_to_speech/glm_tts/run_gradio_demo.sh"
+    ``````
+??? abstract "glm_tts/run_server.sh"
+    ``````sh
+    --8<-- "examples/online_serving/text_to_speech/glm_tts/run_server.sh"
+    ``````
 ??? abstract "omnivoice/run_server.sh"
     ``````sh
     --8<-- "examples/online_serving/text_to_speech/omnivoice/run_server.sh"
@@ -463,14 +515,6 @@ The demo handles voice-preset selection and reference-audio upload. `voxtral_tts
     ``````py
     --8<-- "examples/online_serving/text_to_speech/qwen3_tts/tts_common.py"
     ``````
-??? abstract "voxcpm/openai_speech_client.py"
-    ``````py
-    --8<-- "examples/online_serving/text_to_speech/voxcpm/openai_speech_client.py"
-    ``````
-??? abstract "voxcpm/run_server.sh"
-    ``````sh
-    --8<-- "examples/online_serving/text_to_speech/voxcpm/run_server.sh"
-    ``````
 ??? abstract "voxcpm2/gradio_demo.py"
     ``````py
     --8<-- "examples/online_serving/text_to_speech/voxcpm2/gradio_demo.py"

docs/user_guide/quantization/autoround.md

@@ -32,7 +32,9 @@ guide. AutoRound is Intel-supported.
 |-------|------------|-------|--------|---------|
 | FLUX.1-dev | `vllm-project-org/FLUX.1-dev-AutoRound-w4a16` | Diffusion transformer | W4A16 | GPTQ-Marlin or Intel-supported AutoRound backend |
 | Qwen-Image | Not listed | Diffusion transformer | W4A16 | Not validated |
-| Wan2.2 | Not listed | Diffusion transformer | W4A16 | Not validated |
+| Wan2.2-I2V | `Intel/Wan2.2-I2V-A14B-Diffusers-int4-AutoRound` | Diffusion transformer | W4A16 | GPTQ-Marlin or Intel-supported AutoRound backend |
+| Wan2.2-T2V | `Intel/Wan2.2-T2V-A14B-Diffusers-int4-AutoRound` | Diffusion transformer | W4A16 | GPTQ-Marlin or Intel-supported AutoRound backend |
+| Wan2.2-TI2V | `Intel/Wan2.2-TI2V-5B-Diffusers-int4-AutoRound` | Diffusion transformer | W4A16 | GPTQ-Marlin or Intel-supported AutoRound backend |
 
 ### Multi-Stage Omni/TTS Model (Qwen3-Omni, Qwen3-TTS)
 

docs/user_guide/quantization/fp8.md

@@ -2,11 +2,11 @@
 
 ## Overview
 
-FP8 quantization converts BF16/FP16 weights to FP8 at model load time, or loads
-a checkpoint whose target stage already declares an FP8 quantization config.
-Online activation scaling is the default and does not require calibration.
-Static activation scaling is supported when calibrated scale information is
-available.
+FP8 quantization converts BF16/FP16 weights to FP8 at model load time. Online
+activation scaling is the default and does not require calibration. Static
+activation scaling is supported when calibrated scale information is available.
+For ModelOpt-produced pre-quantized checkpoints, see
+[ModelOpt Quantization](modelopt.md).
 
 Some architectures can quantize all linear layers. Others have
 quality-sensitive layers that should stay in BF16 through `ignored_layers`.
@@ -46,7 +46,7 @@ guide. FP8 on Ampere may use a weight-only path where available.
 
 | Model | Scope | Format | Status |
 |-------|-------|--------|--------|
-| Qwen3-Omni | Thinker language-model stage | ModelOpt `quant_algo=FP8` | Tested for thinker memory reduction |
+| Qwen3-Omni | Thinker language-model stage | [ModelOpt](modelopt.md) `quant_algo=FP8` | Tested for thinker memory reduction |
 | Qwen3-TTS | TTS language-model stage | Checkpoint config | Not validated |
 
 Audio encoder, vision encoder, talker, and code2wav stay in BF16 unless a

docs/user_guide/quantization/modelopt.md

@@ -0,0 +1,191 @@
+# ModelOpt Quantization
+
+## Overview
+
+ModelOpt quantization loads checkpoints produced by NVIDIA ModelOpt. The
+quantized weights and scale tensors are generated before serving, so inference
+does not run online calibration or convert a BF16 checkpoint at startup.
+
+vLLM-Omni validates ModelOpt FP8, ModelOpt NVFP4, and ModelOpt mixed
+FP8/NVFP4 checkpoint loading for diffusion transformer stages. The loader
+auto-detects supported ModelOpt checkpoint configs and keeps non-transformer
+components, such as the tokenizer, scheduler, text encoder, vision/audio
+encoder, and VAE, on the base checkpoint unless a model-specific guide says
+otherwise.
+
+!!! note
+    ModelOpt checkpoints are pre-quantized checkpoints. Do not pass
+    `--quantization fp8` for these checkpoints. The checkpoint
+    `quantization_config` selects the ModelOpt path.
+
+!!! note
+    `--force-cutlass-fp8`, `--linear-backend cutlass`, and
+    `--moe-backend cutlass` are runtime backend selections for checkpoints that
+    already carry supported ModelOpt quantized weights and scales. They do not
+    quantize BF16 checkpoints at startup.
+
+## Supported ModelOpt Checkpoint Formats
+
+vLLM-Omni treats ModelOpt checkpoints as pre-quantized checkpoints. The
+checkpoint config must identify ModelOpt as the quantization method or producer,
+and the quantization algorithm must be one of the validated algorithms below.
+
+| Checkpoint field | Supported value |
+|------------------|-----------------|
+| `method` / `quant_method` | `modelopt`, `modelopt_fp4`, `modelopt_mixed` |
+| `producer.name` | `modelopt` |
+| `quant_algo` | `FP8`, `FP8_PER_CHANNEL_PER_TOKEN`, `NVFP4`, `MIXED_PRECISION` |
+
+| `quant_algo` | Runtime method | Typical use |
+|--------------|----------------|-------------|
+| `FP8`, `FP8_PER_CHANNEL_PER_TOKEN` | `modelopt` | FP8 diffusion transformer checkpoints |
+| `NVFP4` | `modelopt_fp4` | NVFP4 diffusion transformer checkpoints |
+| `MIXED_PRECISION` | `modelopt_mixed` | Mixed FP8/NVFP4 checkpoints with a ModelOpt per-layer policy |
+
+For multi-component diffusion or omni models, only the checkpoint component
+that contains ModelOpt quantized weights should use the ModelOpt quantization
+method. Encoders, decoders, tokenizers, schedulers, and other BF16 components
+stay unquantized unless the model-specific recipe validates otherwise.
+
+## Hardware Support
+
+| Device | Support |
+|--------|---------|
+| NVIDIA Blackwell GPU (SM 100+) | ✅ |
+| NVIDIA Ada/Hopper GPU (SM 89+) | ✅ |
+| NVIDIA Ampere GPU (SM 80+) | ⭕ |
+| AMD ROCm | ⭕ |
+| Intel XPU | ⭕ |
+| Ascend NPU | ❌ |
+
+Legend: `✅` supported, `❌` unsupported, `⭕` not verified in this guide.
+The optional CUTLASS FP8 runtime override requires CUDA SM89+. ModelOpt NVFP4
+and mixed FP8/NVFP4 diffusion checkpoints are currently validated on Blackwell
+CUDA systems in the recipes below; other CUDA generations require separate
+backend and quality validation.
+
+## Model Type Support
+
+### Diffusion Model
+
+| Model | HF checkpoint | Scope | Status |
+|-------|---------------|-------|--------|
+| Qwen-Image 2512 | `feizhai123/qwen-image-2512-modelopt-fp8-dynamic-all` | Diffusion transformer | Validated for ModelOpt FP8 checkpoints |
+| Qwen-Image 2512 | `feizhai123/qwen-image-2512-modelopt-mixed-fp8-sensitive-nvfp4-heavy` | Diffusion transformer | Validated for ModelOpt mixed FP8/NVFP4 checkpoints |
+| Z-Image | `feizhai123/z-image-modelopt-fp8-conservative` | Diffusion transformer | Validated for ModelOpt FP8 checkpoints |
+| FLUX.2-dev | `feizhai123/flux2-dev-modelopt-fp8` | Diffusion transformer | Validated for ModelOpt FP8 checkpoints |
+| FLUX.2-klein 4B | `feizhai123/flux2-klein-4b-modelopt-fp8` | Diffusion transformer | Validated for ModelOpt FP8 checkpoints |
+| HunyuanImage-3.0 | `feizhai123/hunyuan-image3-modelopt-fp8` | MoE diffusion transformer | Validated for ModelOpt FP8 checkpoints |
+| HunyuanImage-3.0 | `feizhai123/hunyuan-image3-modelopt-mixed-experts-nvfp4-dense-fp8` | MoE diffusion transformer | Validated for ModelOpt mixed FP8/NVFP4 checkpoints |
+| Wan2.2 | Not available | Diffusion transformer | Not validated |
+
+For full serving commands and benchmark context, see
+[`recipes/Qwen/Qwen-Image.md`](https://github.com/vllm-project/vllm-omni/blob/main/recipes/Qwen/Qwen-Image.md)
+and
+[`recipes/Tencent/HunyuanImage-3.0-Instruct.md`](https://github.com/vllm-project/vllm-omni/blob/main/recipes/Tencent/HunyuanImage-3.0-Instruct.md).
+
+### Multi-Stage Omni/TTS Model
+
+| Model | Scope | Status |
+|-------|-------|--------|
+| Qwen3-Omni | Thinker language-model stage | ModelOpt FP8 checkpoint path |
+| Qwen3-TTS | TTS language-model stage | Not validated |
+
+Audio encoder, vision encoder, talker, and code2wav stages stay in BF16 unless
+a model-specific guide documents otherwise.
+
+### Multi-Stage Diffusion Model
+
+ModelOpt checkpoints must be routed to the stage whose checkpoint contains the
+ModelOpt `quantization_config`. BAGEL and GLM-Image are not listed as validated
+ModelOpt targets yet.
+
+## Configuration
+
+For pre-quantized ModelOpt checkpoints, no `--quantization fp8` flag is needed.
+The checkpoint config selects the ModelOpt path.
+
+Online serving:
+
+```bash
+vllm serve <modelopt-checkpoint> \
+  --omni \
+  --tensor-parallel-size <N> \
+  --linear-backend cutlass \
+  --force-cutlass-fp8
+```
+
+For mixed FP8/NVFP4 MoE checkpoints, also select the validated MoE backend:
+
+```bash
+vllm serve <modelopt-mixed-moe-checkpoint> \
+  --omni \
+  --tensor-parallel-size <N> \
+  --enable-expert-parallel \
+  --linear-backend cutlass \
+  --moe-backend cutlass \
+  --force-cutlass-fp8
+```
+
+Offline inference:
+
+```bash
+python examples/offline_inference/text_to_image/text_to_image.py \
+  --model <modelopt-checkpoint> \
+  --tensor-parallel-size <N> \
+  --prompt "a red ceramic teapot on a wooden table" \
+  --height 1024 \
+  --width 1024 \
+  --num-inference-steps 20 \
+  --seed 42 \
+  --output outputs/modelopt.png
+```
+
+Python API:
+
+```python
+from vllm_omni import Omni
+
+omni = Omni(
+    model="<modelopt-checkpoint>",
+    tensor_parallel_size=2,
+    force_cutlass_fp8=True,
+)
+```
+
+## Parameters
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| `force_cutlass_fp8` / `--force-cutlass-fp8` | bool | `False` | Force CUTLASS FP8 linear kernels for supported ModelOpt FP8 diffusion stages on CUDA SM89+ |
+| `--linear-backend cutlass` | str | auto | Select the validated CUTLASS linear backend for supported ModelOpt NVFP4 or mixed FP8/NVFP4 diffusion stages |
+| `--moe-backend cutlass` | str | auto | Select the validated CUTLASS MoE backend for supported ModelOpt mixed MoE checkpoints |
+
+## Validation and Notes
+
+1. Compare the ModelOpt checkpoint against the BF16 baseline with the same
+   prompt, resolution, seed, and inference steps.
+2. Use `tests/diffusion/quantization/test_quantization_quality.py` with
+   `VLLM_OMNI_QUALITY_CONFIGS` to validate local baseline and quantized model
+   paths.
+3. For HunyuanImage-3.0 quantized DiT checkpoints, the opt-in accuracy check is:
+
+   ```bash
+   CUDA_VISIBLE_DEVICES=2,3 \
+   HUNYUAN_IMAGE3_RUN_QUANT_ACCURACY=1 \
+   HUNYUAN_IMAGE3_QUANT_DEVICES=0,1 \
+   HUNYUAN_IMAGE3_QUANT_TP=2 \
+   HUNYUAN_IMAGE3_BF16_MODEL=/path/to/hunyuan-image3-bf16 \
+   HUNYUAN_IMAGE3_FP8_MODEL=/path/to/hunyuan-image3-modelopt-fp8 \
+   HUNYUAN_IMAGE3_NVFP4_MODEL=/path/to/hunyuan-image3-modelopt-mixed-experts-nvfp4-dense-fp8 \
+   PYTHONPATH=/path/to/vllm-omni:${PYTHONPATH:-} \
+   python -m pytest -s -v \
+     tests/e2e/accuracy/test_hunyuan_image3.py \
+     -k quantized_dit_matches_bf16_accuracy
+   ```
+
+4. Report CLIP score deltas, SSIM, PSNR, throughput, latency, and peak memory
+   when adding a new validated ModelOpt diffusion checkpoint.
+5. Keep `--quantization fp8` for online FP8 from BF16 checkpoints; use this
+   ModelOpt path only when the checkpoint already contains ModelOpt quantized
+   weights and scales.

docs/user_guide/quantization/mxfp4.md

@@ -0,0 +1,479 @@
+# W4A4 MXFP4 Quantization
+
+## Overview
+
+W4A4 MXFP4 (Microscaling FP4) quantizes both weights and activations to FP4
+(`float4_e2m1fn_x2`, packed 2 values per byte) using the OCP MX format: groups
+of 32 K-dimension elements share a single `float8_e8m0fnu` exponent scale.
+
+vLLM-Omni provides two quantization methods with different scale structures:
+
+| Method | Scale structure | Mode | Use case |
+|--------|----------------|------|----------|
+| `mxfp4` | Single-scale (per-32 fine only) | Online only | Quick accuracy baseline; no checkpoint prep needed |
+| `mxfp4_dualscale` | Dual-scale (fine per-32 + coarse per-512 + per-channel `mul_scale`) | Online + Offline | Production; better accuracy; offline recommended |
+
+!!! tip "Recommended: `mxfp4_dualscale` offline"
+    For production deployments, use the `mxfp4_dualscale` offline mode with a
+    pre-quantized checkpoint produced by msModelSlim. Offline checkpoints load
+    calibrated `mul_scale` tensors from disk, providing measurably better accuracy
+    than any online method. The one-time preprocessing cost amortises across all
+    subsequent inference runs.
+
+    Use `mxfp4` online only for quick experimentation where preprocessing time
+    is not acceptable and accuracy loss is tolerable.
+
+!!! warning "Online single-scale ≠ Offline dual-scale"
+    `mxfp4_dualscale` offline mode uses `NPUMxfp4DualScaleLinearMethod`:
+    fine scale (per-32 K), coarse scale (per-512 K), and per-input-channel
+    `mul_scale` from calibration — all loaded from the checkpoint.
+    `mxfp4_dualscale` online mode uses `NPUMxfp4DualScaleOnlineLinearMethod`:
+    dual-level scales computed on the fly from BF16 weights; no calibration
+    `mul_scale` is available. Loading an offline checkpoint with the online
+    method (or vice versa) will produce incorrect results or shape errors.
+
+## Hardware Support
+
+| Device | Support |
+|--------|---------|
+| NVIDIA Blackwell GPU (SM 100+) | ⭕ |
+| NVIDIA Ada/Hopper GPU (SM 89+) | ⭕ |
+| NVIDIA Ampere GPU (SM 80+) | ⭕ |
+| AMD ROCm | ⭕ |
+| Intel XPU | ⭕ |
+| Ascend NPU (Atlas 950 A5) | ✅ |
+
+Legend: `✅` supported, `❌` unsupported, `⭕` not verified in this guide.
+
+## Model Type Support
+
+### Diffusion Model (Wan2.2)
+
+| Model | Online | Offline | Notes |
+|-------|--------|---------|-------|
+| Wan2.2-T2V-A14B | `mxfp4` / `mxfp4_dualscale` | `mxfp4_dualscale` | MoE cascade (`transformer` + `transformer_2`); both transformers quantized with the same config |
+| Wan2.2-I2V-A14B | `mxfp4` / `mxfp4_dualscale` | `mxfp4_dualscale` | MoE cascade; same scheme as T2V-A14B |
+| Wan2.2-TI2V-5B | ❌ | ❌ | Parameter count too small; W4A4 causes unacceptable accuracy loss |
+
+The choice between `mxfp4` and `mxfp4_dualscale` in **online mode** is about
+quantization quality, not model compatibility — both work on cascade (A14B) and
+single-transformer models alike, the same as `mxfp8` online:
+
+- `mxfp4`: single-scale, lower overhead, simpler compute, online only
+- `mxfp4_dualscale`: dual-scale + optional BF16 fallback, better accuracy, online **and** offline
+
+**Offline** checkpoints for A14B are always in `mxfp4_dualscale` format (produced
+by the merge script); there is no offline `mxfp4` single-scale format.
+
+!!! note "Per-layer BF16 fallback in offline cascade models"
+    The A14B offline checkpoint uses `quant_method: mxfp4_dualscale`. Most
+    linear layers are stored as W4A4 MXFP4 DualScale; precision-sensitive layers
+    retain their original BF16 weights and are listed in `ignored_layers` inside
+    each transformer's `config.json`. The two transformers may have different
+    `ignored_layers` sets — the pipeline reads each transformer's own `config.json`
+    and rebuilds the config locally when they differ, so routing is always
+    per-transformer-accurate.
+
+!!! warning "TI2V-5B not supported"
+    Wan2.2-TI2V-5B is excluded from W4A4 quantization. Its smaller parameter
+    count makes it significantly more sensitive to 4-bit quantization noise,
+    resulting in unacceptable accuracy loss. Use [MXFP8](mxfp8.md) for TI2V-5B.
+
+## Configuration
+
+### `mxfp4` — Single-Scale Online Mode
+
+Online mode requires no pre-processing. vLLM-Omni quantizes BF16 weights to
+MXFP4 at load time using `npu_dynamic_mx_quant`. A single block scale
+(`float8_e8m0fnu`, one per 32 K elements) is computed on the fly; no
+calibration `mul_scale` is available. Applies equally to single-transformer
+and cascade (A14B) models — both transformers in a cascade receive the same
+quantization config automatically.
+
+```python
+from vllm_omni import Omni
+from vllm_omni.inputs.data import OmniDiffusionSamplingParams
+
+omni = Omni(model="<your-model>", quantization="mxfp4")
+outputs = omni.generate(
+    "A cat sitting on a windowsill",
+    OmniDiffusionSamplingParams(num_inference_steps=50),
+)
+```
+
+```bash
+# Single-transformer or cascade model — same command
+python text_to_video.py --model <your-model> --quantization mxfp4
+
+# Online serving
+vllm serve <your-model> --omni --quantization mxfp4
+```
+
+### `mxfp4_dualscale` — DualScale Online Mode
+
+Online DualScale mode computes both fine and coarse scales on the fly from BF16
+weights using `npu_dynamic_dual_level_mx_quant`. Applies equally to
+single-transformer and cascade (A14B) models. Compared to `mxfp4` online,
+DualScale provides better quantization accuracy at higher compute cost.
+
+The default configuration keeps the leading 5 transformer blocks in BF16
+(`num_bf16_fallback_layers=5`). Accuracy evaluation on Wan2.2-A14B shows this
+is sufficient to meet quality requirements and is the recommended setting.
+
+```python
+omni = Omni(model="<your-model>", quantization="mxfp4_dualscale")
+```
+
+```bash
+python text_to_video.py --model <your-model> --quantization mxfp4_dualscale
+```
+
+If accuracy debugging identifies additional precision-sensitive layers, they
+can be pinned to BF16 via the Python API:
+
+```python
+omni = Omni(
+    model="<your-model>",
+    quantization_config={
+        "method": "mxfp4_dualscale",
+        "ignored_layers": ["blocks.10.attn1.to_q"],   # explicit per-layer override
+    },
+)
+```
+
+BF16 fallback routing in online mode applies two rules in priority order:
+
+1. **`ignored_layers`** (explicit per-layer override): any layer whose prefix
+   matches is kept in BF16 regardless of block index.
+2. **`num_bf16_fallback_layers`** (coarse leading-block rule): the first N
+   transformer blocks (`blocks.0` … `blocks.N-1`) fall back to BF16. Defaults
+   to `5` (recommended). Layers outside `blocks.N.*`
+   (e.g. `condition_embedder`) are always quantized.
+
+### `mxfp4_dualscale` — DualScale Offline Mode (Recommended)
+
+Offline mode loads a pre-quantized DualScale checkpoint from msModelSlim. A
+preprocessing step converts the raw quantized output to the diffusers format
+expected by vLLM-Omni and injects the quantization config into each
+`transformer/config.json` so that vLLM-Omni auto-detects the offline path
+without a `--quantization` flag.
+
+BF16 fallback layers may be interleaved anywhere in the transformer — they are
+not restricted to leading blocks. The merge script detects them from
+`quant_model_description.json` and writes their prefixes into `ignored_layers`
+inside `config.json`. At runtime, each layer's prefix is matched against
+`ignored_layers` to decide BF16 vs. MXFP4 DualScale.
+
+#### Checkpoint tensor layout
+
+Each quantized linear layer stores four tensors:
+
+| Tensor | Shape | dtype | Description |
+|--------|-------|-------|-------------|
+| `weight` | `(N, K)` | float8_e4m3fn | FP4 packed (2 values per byte) |
+| `weight_scale` | `(N, K//32)` | uint8 | Fine block scale (`float8_e8m0fnu` bit pattern) |
+| `weight_dual_scale` | `(N, K//512, 1)` | float32 | Coarse block scale |
+| `mul_scale` | `(K,)` | float32 | Per-input-channel smooth pre-scale (from calibration) |
+
+BF16 fallback layers have no quantization tensors; only the original `weight`
+(and optional `bias`) are present, loaded directly from the base checkpoint.
+
+#### Step 1 — Quantize with msModelSlim
+
+```bash
+msmodelslim quant \
+  --model_path /path/to/Wan2.2-T2V-A14B-Diffusers \
+  --save_path  /path/to/wan2_2_t2v_quantized_raw \
+  --device npu \
+  --model_type Wan2_2 \
+  --config_path /path/to/wan2_2_w4a4_mxfp4_dualscale.yaml \
+  --trust_remote_code True
+```
+
+After this step, `--save_path` contains raw quantized safetensors files,
+scale files, and a metadata JSON (`quant_model_description*.json`).
+
+For cascade MoE models (T2V-A14B, I2V-A14B), msModelSlim outputs two
+subdirectories: `high_noise_model/` (transformer) and `low_noise_model/`
+(transformer_2).
+
+#### Step 2 — Preprocess with merge_mxfp4_dualscale_checkpoint.py
+
+The script (`vllm_omni/quantization/tools/merge_mxfp4_dualscale_checkpoint.py`):
+
+1. Copies the original diffusers model to `--output-path` (VAE, text encoder,
+   scheduler, etc. are preserved).
+2. Remaps tensor names from msModelSlim convention to diffusers convention and
+   strips `.linear.` / `.div.` wrappers added by the quantization tool.
+3. Overlays MXFP4 tensors (weight, fine/coarse scales, `mul_scale`) onto the
+   BF16 base checkpoint. Non-quantized layers keep their original BF16 weights.
+4. Detects all linear layers that remain in BF16 and writes their prefixes into
+   `ignored_layers` in `config.json`.
+5. Injects `quantization_config` so vLLM-Omni auto-detects offline MXFP4
+   DualScale.
+
+For cascade MoE models, steps 2–5 run separately for each transformer.
+
+```bash
+python vllm_omni/quantization/tools/merge_mxfp4_dualscale_checkpoint.py \
+  --model-type     Wan2.2-T2V-A14B \
+  --original-model /path/to/Wan2.2-T2V-A14B-Diffusers \
+  --quant-path     /path/to/wan2_2_t2v_quantized_raw \
+  --output-path    /path/to/Wan2.2-T2V-A14B-MXFP4-DualScale
+```
+
+| Argument | Description |
+|----------|-------------|
+| `--model-type` | Model variant: `Wan2.2-T2V-A14B` or `Wan2.2-I2V-A14B` |
+| `--original-model` | Root directory of the original BF16 diffusers model |
+| `--quant-path` | Root directory of the msModelSlim quantized output |
+| `--output-path` | Output directory for the merged model (created by the script) |
+
+The script outputs a complete diffusers model directory at `--output-path`,
+with each transformer subfolder containing:
+
+- `diffusion_pytorch_model.safetensors` — MXFP4 weights + scale tensors, with BF16 fallback layers from the base checkpoint
+- `config.json` — original transformer config with `quantization_config` injected
+- `quant_model_description.json` — quantization metadata (reference only)
+
+The `quantization_config` injected into `config.json` for each transformer:
+
+```json
+{
+  "quant_method": "mxfp4_dualscale",
+  "is_checkpoint_serialized": true,
+  "ignored_layers": [
+    "blocks.0.attn1.to_qkv",
+    "blocks.0.attn1.to_out",
+    "proj_out"
+  ]
+}
+```
+
+`ignored_layers` lists every linear layer that retains its original BF16 weight,
+using vllm-omni model parameter names (QKV-fused, FFN underscored, `to_out`
+unindexed). The exact entries are determined by the quantization tool (msModelSlim)
+and may differ between `transformer` and `transformer_2` in a cascade model.
+
+#### Step 3 — Serve
+
+```bash
+python text_to_video.py --model /path/to/Wan2.2-T2V-A14B-MXFP4-DualScale
+
+# Online serving
+vllm serve /path/to/Wan2.2-T2V-A14B-MXFP4-DualScale --omni
+```
+
+```python
+omni = Omni(model="/path/to/Wan2.2-T2V-A14B-MXFP4-DualScale")
+```
+
+!!! note
+    No `--quantization` flag is needed for offline mode. The preprocessing
+    script injects `quantization_config` into each `transformer/config.json`,
+    which vLLM-Omni reads automatically to activate the correct offline path.
+
+## Parameters
+
+### `mxfp4` (single-scale, online only)
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| `method` | str | — | `"mxfp4"` |
+| `ignored_layers` | list[str] | `[]` | Layer prefixes to keep in BF16 |
+
+### `mxfp4_dualscale` (dual-scale, online + offline)
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| `method` | str | — | `"mxfp4_dualscale"` |
+| `is_checkpoint_serialized` | bool | `False` | `True` for offline DualScale checkpoints; auto-set from `config.json` when using the preprocessing script |
+| `ignored_layers` | list[str] | `[]` | Layer prefixes to keep in BF16. **Works in both modes**: offline — populated by the merge script for interleaved sensitive layers; online — user-supplied for explicit per-layer precision override |
+| `num_bf16_fallback_layers` | int | `5` | **Online mode only**: leading N transformer blocks (`blocks.0` … `blocks.N-1`) kept in BF16. Applied after `ignored_layers`; ignored in offline mode. Default of `5` is the evaluated recommended value for Wan2.2-A14B |
+
+#### BF16 fallback priority (online mode)
+
+```
+for each linear layer:
+    if prefix in ignored_layers               → BF16  (explicit override, highest priority)
+    elif block_idx < num_bf16_fallback_layers → BF16  (coarse leading-block rule)
+    else                                      → MXFP4 DualScale online
+```
+
+Layers outside `blocks.N.*` (e.g. `condition_embedder.*`) are always quantized
+unless they appear in `ignored_layers`.
+
+## Validation and Notes
+
+1. **Online single-scale (`mxfp4`)** quantizes BF16 weights at load time using
+   `npu_dynamic_mx_quant` (single-scale). No calibration `mul_scale` is
+   available — all output partitions receive an identity pre-scale. No offline
+   checkpoint format exists for this method.
+
+2. **Online dual-scale (`mxfp4_dualscale`, `is_checkpoint_serialized=False`)**
+   quantizes BF16 weights using `npu_dynamic_dual_level_mx_quant` (fine + coarse
+   scales computed on the fly). No calibration `mul_scale`; leading blocks or
+   explicit `ignored_layers` stay in BF16 for accuracy.
+
+3. **Offline dual-scale (`mxfp4_dualscale`, `is_checkpoint_serialized=True`)** —
+   **recommended for production** — loads four tensors per quantized layer: FP4
+   weight, fine scale (`uint8` reinterpreted as `float8_e8m0fnu`), coarse scale
+   (`float32`), and per-input-channel `mul_scale` (`float32`). BF16 fallback
+   layers have no quantization tensors and are routed via `ignored_layers`.
+
+4. **Scale dtype**: fine scales are stored as `uint8` in safetensors (same bit
+   layout as `float8_e8m0fnu`) and reinterpreted at load time without a lossy
+   float32 round-trip.
+
+5. **Cascade model config propagation**: in a cascade model (transformer +
+   transformer_2), vLLM-Omni reads each transformer's own `config.json` and
+   rebuilds the quant config locally when `ignored_layers` differs between
+   transformers, ensuring per-layer routing is accurate for each. The first
+   transformer's config is propagated to `od_config` so the second transformer
+   can reuse it as a starting point.
+
+6. **Self-attention QKV fusion**: Q, K, V projection weights are fused into a
+   single `QKVParallelLinear` layer at runtime. `ignored_layers` entries use the
+   fused name (`attn1.to_qkv`), written automatically by the merge script.
+
+7. W4A4 carries higher quantization noise than W8A8 (16 vs 256 levels). The
+   DualScale offline method mitigates this with calibrated `mul_scale` smooth
+   quantization. Use `ignored_layers` and `num_bf16_fallback_layers` to trade
+   off compression vs. accuracy for precision-sensitive layers.
+
+## Adapting MXFP4 for a New Model
+
+This section is aimed at developers who want to add MXFP4 support to a model
+other than Wan2.2. The three integration points are: (1) discovering the correct
+runtime layer names, (2) wiring `ignored_layers` into the model, and (3) writing
+a merge script for offline checkpoints.
+
+### Step 1 — Discover runtime layer names
+
+`ignored_layers` entries must match the **runtime parameter names** used inside
+vllm-omni, which may differ from the names stored in the diffusers checkpoint.
+The canonical source of truth is the model's own `named_parameters()`.
+
+```python
+from vllm_omni import Omni
+
+# Load the model without quantization to inspect parameter names.
+omni = Omni(model="/path/to/your-model")  # no --quantization flag
+for name, _ in omni.pipeline.transformer.named_parameters():
+    if "weight" in name and "scale" not in name:
+        print(name)
+```
+
+Compare the printed names against the diffusers checkpoint keys
+(`safetensors.safe_open` or `torch.load`) to identify any renames your model
+applies. Common patterns that differ in Wan2.2 (and may appear in other
+models):
+
+| Diffusers checkpoint name | vllm-omni runtime name | Reason |
+|---------------------------|------------------------|--------|
+| `attn1.to_q`, `attn1.to_k`, `attn1.to_v` | `attn1.to_qkv` | Self-attention Q/K/V fused into `QKVParallelLinear` |
+| `ffn.net.0.proj` | `ffn.net_0.proj` | Dots in sub-module names replaced with underscores |
+| `ffn.net.2` | `ffn.net_2` | Same underscore rule |
+| `to_out.0` | `to_out` | Sequential index stripped |
+
+If your model has different fusion patterns, inspect `packed_modules_mapping`
+on the model class — this dict records how checkpoint keys are mapped to
+fused runtime parameters.
+
+!!! warning "Partial QKV fallback is not allowed"
+    If your model fuses Q, K, V into a single layer, `ignored_layers` must
+    include **all three or none**. A partial fallback (e.g. `to_q` in BF16 but
+    `to_k`, `to_v` quantized) cannot be expressed at runtime because they share
+    one `QKVParallelLinear`. The merge script enforces this and raises an error
+    if only some of the trio appear as non-quantized.
+
+### Step 2 — Add ignored_layers to the model
+
+#### Online mode
+
+Pass `ignored_layers` directly in the quantization config using the **runtime
+names** discovered in Step 1. No code changes to the model are required.
+
+```python
+omni = Omni(
+    model="/path/to/your-model",
+    quantization={
+        "method": "mxfp4_dualscale",
+        "ignored_layers": [
+            "blocks.0.attn1.to_qkv",   # runtime name, not diffusers name
+            "blocks.0.attn1.to_out",
+            "blocks.0.ffn.net_0.proj",
+        ],
+    },
+)
+```
+
+```bash
+# CLI does not support list-typed ignored_layers directly.
+# Use the Python API or set ignored_layers in config.json (offline).
+python your_script.py --model /path/to/your-model --quantization mxfp4_dualscale
+```
+
+The `num_bf16_fallback_layers` coarse rule is an alternative to listing layers
+individually: set it to N to keep all linear layers in blocks 0 … N-1 in BF16.
+The right value depends on the model's sensitivity; evaluate on a validation
+set and pick the smallest N that meets your accuracy target.
+
+#### Offline mode
+
+For offline checkpoints, `ignored_layers` is written into each transformer's
+`config.json` by the merge script (see Step 3). No manual editing is needed if
+the merge script is correct. The injected block:
+
+```json
+{
+  "quant_method": "mxfp4_dualscale",
+  "is_checkpoint_serialized": true,
+  "ignored_layers": [
+    "blocks.0.attn1.to_qkv",
+    "blocks.0.attn1.to_out"
+  ]
+}
+```
+
+To add a layer manually (e.g. to pin an additional layer to BF16 without
+re-running the merge script), edit `config.json` inside the transformer
+subfolder. Use runtime names, not diffusers checkpoint names.
+
+### Step 3 — Write a merge script for offline mode
+
+The merge script for a new model mirrors
+`vllm_omni/quantization/tools/merge_mxfp4_dualscale_checkpoint.py`. The four
+things it must do:
+
+1. **Remap tensor names** from the quantization tool convention to diffusers
+   convention (strip wrappers like `.linear.`, `.div.`; fix any prefix
+   differences).
+
+2. **Collect ignored_layers**: after loading, enumerate all `*.weight` keys that
+   have no corresponding `*.weight_scale` (i.e. layers the tool left in BF16).
+   Convert diffusers names to vllm-omni runtime names (fuse QKV, rename FFN
+   sub-modules, etc.). Write the result to `config.json`.
+
+3. **Inject `quantization_config`** into `config.json`:
+   ```python
+   config["quantization_config"] = {
+       "quant_method":              "mxfp4_dualscale",
+       "is_checkpoint_serialized":  True,
+       "ignored_layers":            ignored_layers,   # runtime names
+   }
+   ```
+
+4. **Save** the merged safetensors and the updated `config.json`.
+
+The key helper to implement is the diffusers-to-runtime name translator
+(equivalent to `_diffusers_to_vllm_ignored` in the Wan2.2 merge script).
+For each non-quantized diffusers weight key, apply your model's specific
+renaming rules and collect the results.
+
+!!! tip "Validate before serving"
+    After producing the offline checkpoint, load it without a `--quantization`
+    flag and verify that vLLM-Omni auto-detects the correct method. Check that
+    the layer count reported in the startup log matches expectations: quantized
+    layer count + `ignored_layers` count should equal total linear layer count.
+    Any mismatch indicates a name-mapping bug in the merge script.

docs/user_guide/quantization/mxfp8.md

@@ -0,0 +1,187 @@
+# W8A8 MXFP8 Quantization
+
+## Overview
+
+W8A8 MXFP8 (Microscaling FP8) quantizes both weights and activations to FP8
+using the OCP MX format: groups of 32 K-dimension elements share a single
+`float8_e8m0fnu` exponent scale. This gives better accuracy than channel-wise
+FP8 while keeping the same 8-bit weight footprint.
+
+This method supports two modes:
+
+| Mode | Description |
+|------|-------------|
+| **Online** | BF16 weights are quantized to MXFP8 at load time — no pre-processing needed |
+| **Offline** | msModelSlim-exported MXFP8 weights converted to diffusers format via `merge_mxfp8_checkpoint.py` — weights and scales are loaded directly from the preprocessed checkpoint |
+
+## Hardware Support
+
+| Device | Support |
+|--------|---------|
+| NVIDIA Blackwell GPU (SM 100+) | ⭕ |
+| NVIDIA Ada/Hopper GPU (SM 89+) | ⭕ |
+| NVIDIA Ampere GPU (SM 80+) | ⭕ |
+| AMD ROCm | ⭕ |
+| Intel XPU | ⭕ |
+| Ascend NPU (Atlas 950 A5) | ✅ |
+
+Legend: `✅` supported, `❌` unsupported, `⭕` not verified in this
+guide.
+
+## Model Type Support
+
+### Diffusion Model (Wan2.2)
+
+| Model | Mode | Notes |
+|-------|------|-------|
+| Wan2.2-T2V-A14B | Online + Offline | MoE cascade; quantizes two transformers (`transformer` + `transformer_2`) |
+| Wan2.2-I2V-A14B | Online + Offline | MoE cascade; quantizes two transformers (`transformer` + `transformer_2`) |
+| Wan2.2-TI2V-5B | Online + Offline | Single transformer |
+
+### Multi-Stage Omni/TTS Model (Qwen3-Omni, Qwen3-TTS)
+
+| Model | Status | Notes |
+|-------|--------|-------|
+| Qwen3-Omni | Not validated | — |
+| Qwen3-TTS | Not validated | — |
+
+### Multi-Stage Diffusion Model (BAGEL, GLM-Image)
+
+| Model | Status | Notes |
+|-------|--------|-------|
+| BAGEL | Not validated | — |
+| GLM-Image | Not validated | — |
+
+## Configuration
+
+### Online Mode
+
+Online mode requires no pre-processing. vLLM-Omni quantizes BF16 weights to
+MXFP8 at load time.
+
+Python API:
+
+```python
+from vllm_omni import Omni
+from vllm_omni.inputs.data import OmniDiffusionSamplingParams
+
+omni = Omni(model="<your-model>", quantization="mxfp8")
+
+outputs = omni.generate(
+    "A cat sitting on a windowsill",
+    OmniDiffusionSamplingParams(num_inference_steps=50),
+)
+```
+
+CLI:
+
+```bash
+python text_to_video.py --model <your-model> --quantization mxfp8
+
+# Online serving
+vllm serve <your-model> --omni --quantization mxfp8
+```
+
+### Offline Mode
+
+Offline mode loads a pre-quantized checkpoint from msModelSlim. A preprocessing
+step converts the raw quantized output to the diffusers format expected by
+vLLM-Omni and injects the quantization config into `transformer/config.json` so
+that vLLM-Omni auto-detects the offline path without a `--quantization` flag.
+
+#### Step 1 — Quantize with msModelSlim
+
+```bash
+msmodelslim quant \
+  --model_path /path/to/Wan2.2-TI2V-5B-Diffusers \
+  --save_path  /path/to/wan2_2_ti2v_quantized_raw \
+  --device npu \
+  --model_type Wan2_2 \
+  --config_path /path/to/wan2_2_w8a8f8_mxfp.yaml \
+  --trust_remote_code True
+```
+
+After this step, `--save_path` contains the raw quantized safetensors files and
+a metadata JSON (`quant_model_description*.json`).
+
+For cascade MoE models (T2V-A14B, I2V-A14B), msModelSlim outputs two
+subdirectories: `high_noise_model/` and `low_noise_model/`.
+
+#### Step 2 — Preprocess with merge_mxfp8_checkpoint.py
+
+The script (`vllm_omni/quantization/tools/merge_mxfp8_checkpoint.py`):
+
+1. Copies the original diffusers model to `--output-path` (VAE, text encoder,
+   scheduler, etc. are preserved).
+2. Remaps tensor names from msModelSlim convention to diffusers convention.
+3. Saves the converted weights as `diffusion_pytorch_model.safetensors`.
+4. Copies the original `transformer/config.json` and injects
+   `quantization_config` so that vLLM-Omni auto-detects offline MXFP8.
+
+For cascade MoE models, steps 2–4 run separately for `high_noise_model/` →
+`transformer/` and `low_noise_model/` → `transformer_2/`.
+
+```bash
+python vllm_omni/quantization/tools/merge_mxfp8_checkpoint.py \
+  --model-type     Wan2.2-TI2V-5B \
+  --original-model /path/to/Wan2.2-TI2V-5B-Diffusers \
+  --quant-path     /path/to/wan2_2_ti2v_quantized_raw \
+  --output-path    /path/to/Wan2.2-TI2V-5B-MXFP8
+```
+
+| Argument | Description |
+|----------|-------------|
+| `--model-type` | Model variant: `Wan2.2-T2V-A14B`, `Wan2.2-I2V-A14B`, or `Wan2.2-TI2V-5B` |
+| `--original-model` | Root directory of the original BF16 diffusers model |
+| `--quant-path` | Root directory of the msModelSlim quantized output |
+| `--output-path` | Output directory for the merged model (created by the script) |
+
+The script outputs a complete diffusers model directory at `--output-path`,
+with each transformer subfolder containing:
+
+- `diffusion_pytorch_model.safetensors` — converted FP8 weights
+- `config.json` — original transformer config with `quantization_config` injected
+- `quant_model_description.json` — renamed quantization metadata (reference only)
+
+#### Step 3 — Serve
+
+```bash
+python text_to_video.py --model /path/to/Wan2.2-TI2V-5B-MXFP8
+
+# Online serving
+vllm serve /path/to/Wan2.2-TI2V-5B-MXFP8 --omni
+```
+
+Python API:
+
+```python
+omni = Omni(model="/path/to/Wan2.2-TI2V-5B-MXFP8")
+```
+
+!!! note
+    No `--quantization` flag is needed for offline mode. The preprocessing
+    script injects `quantization_config` into each `transformer/config.json`,
+    which vLLM-Omni reads automatically to activate the offline MXFP8 method.
+
+## Parameters
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| `method` | str | — | Must be `"mxfp8"` |
+| `is_checkpoint_mxfp8_serialized` | bool | `False` | `True` for offline pre-quantized checkpoints; auto-set from `config.json` when using the preprocessing script |
+| `ignored_layers` | list[str] | `[]` | Layer name substrings to keep in BF16 (e.g. `"to_out"` matches `blocks.0.attn1.to_out.0`) |
+
+## Validation and Notes
+
+1. Online mode quantizes BF16 weights at load time using
+   `npu_dynamic_mx_quant`. This adds a one-time overhead on the first load
+   but requires no checkpoint preparation.
+2. Offline mode loads FP8 weights directly from the checkpoint. Scales are
+   stored as `uint8` bytes in safetensors (same bit layout as
+   `float8_e8m0fnu`) and are reinterpreted at load time without a dtype
+   conversion.
+3. If the offline checkpoint was produced with the old `merge_mxfp8_checkpoint.py`
+   interface (arguments `--quant-dir`, `--orig-dir`, `--meta-json`,
+   `--output-dir`), regenerate it with the current script. The old script
+   wrote a separate `quantization_config.json` that is not read by vLLM-Omni;
+   the current script injects the config directly into `transformer/config.json`.

docs/user_guide/quantization/online.md

@@ -9,20 +9,24 @@ separate quantized checkpoint.
 This mode is different from pre-quantized checkpoint formats such as GGUF,
 AutoRound, msModelSlim, or serialized Int8 checkpoints. Those formats are
 prepared before serving and are documented in their method-specific guides.
+For MXFP8 and MXFP4, use this page for load-time quantization from BF16
+checkpoints, and use the method-specific pages for offline checkpoints produced
+by msModelSlim and the merge tools.
 
 ## Hardware Support
 
-| Device | FP8 W8A8 | Int8 W8A8 |
-|--------|----------|-----------|
-| NVIDIA Blackwell GPU (SM 100+) | ✅ | ✅ |
-| NVIDIA Ada/Hopper GPU (SM 89+) | ✅ | ✅ |
-| NVIDIA Ampere GPU (SM 80+) | ✅ | ✅ |
-| AMD ROCm | ⭕ | ⭕ |
-| Intel XPU | ⭕ | ⭕ |
-| Ascend NPU | ❌ | ✅ |
+| Device | FP8 W8A8 | Int8 W8A8 | MXFP8 W8A8 | MXFP4 W4A4 |
+|--------|----------|-----------|------------|------------|
+| NVIDIA Blackwell GPU (SM 100+) | ✅ | ✅ | ⭕ | ⭕ |
+| NVIDIA Ada/Hopper GPU (SM 89+) | ✅ | ✅ | ⭕ | ⭕ |
+| NVIDIA Ampere GPU (SM 80+) | ✅ | ✅ | ⭕ | ⭕ |
+| AMD ROCm | ⭕ | ⭕ | ⭕ | ⭕ |
+| Intel XPU | ⭕ | ⭕ | ⭕ | ⭕ |
+| Ascend NPU | ❌ | ✅ | ✅ | ✅ |
 
 Legend: `✅` supported, `❌` unsupported, `⭕` not verified in this
-guide. FP8 on Ampere may use a weight-only path where available.
+guide. FP8 on Ampere may use a weight-only path where available. MXFP8 and
+MXFP4 are documented for the Ascend NPU path.
 
 ## Model Type Support
 
@@ -32,6 +36,8 @@ guide. FP8 on Ampere may use a weight-only path where available.
 |--------|-------|----------------|--------|
 | FP8 W8A8 | [FP8](fp8.md) | Qwen-Image; Wan2.2 is not validated | Validated for Qwen-Image family and other DiT models |
 | Int8 W8A8 | [Int8](int8.md) | Qwen-Image; Wan2.2 is not validated | Validated for Qwen-Image and Z-Image |
+| MXFP8 W8A8 | [MXFP8](mxfp8.md) | Wan2.2-T2V-A14B, Wan2.2-I2V-A14B, Wan2.2-TI2V-5B | Ascend NPU only |
+| MXFP4 W4A4 | [MXFP4](mxfp4.md) | Wan2.2-T2V-A14B, Wan2.2-I2V-A14B | Ascend NPU only; TI2V-5B is not supported |
 
 ### Multi-Stage Omni/TTS Model (Qwen3-Omni, Qwen3-TTS)
 
@@ -53,6 +59,9 @@ from vllm_omni import Omni
 
 omni_fp8 = Omni(model="<your-model>", quantization="fp8")
 omni_int8 = Omni(model="<your-model>", quantization="int8")
+omni_mxfp8 = Omni(model="<your-model>", quantization="mxfp8")
+omni_mxfp4 = Omni(model="<your-model>", quantization="mxfp4")
+omni_mxfp4_dualscale = Omni(model="<your-model>", quantization="mxfp4_dualscale")
 ```
 
 CLI:
@@ -60,6 +69,9 @@ CLI:
 ```bash
 vllm serve <your-model> --omni --quantization fp8
 vllm serve <your-model> --omni --quantization int8
+vllm serve <your-model> --omni --quantization mxfp8
+vllm serve <your-model> --omni --quantization mxfp4
+vllm serve <your-model> --omni --quantization mxfp4_dualscale
 ```
 
 Per-component routing:
@@ -77,10 +89,11 @@ config = build_quant_config({
 
 | Parameter | Methods | Description |
 |-----------|---------|-------------|
-| `method` | FP8, Int8 | Quantization method, usually `"fp8"` or `"int8"` |
-| `ignored_layers` | FP8, Int8 | Layer name patterns to keep in BF16/FP16 |
+| `method` | FP8, Int8, MXFP8, MXFP4 | Quantization method: `"fp8"`, `"int8"`, `"mxfp8"`, `"mxfp4"`, or `"mxfp4_dualscale"` |
+| `ignored_layers` | FP8, Int8, MXFP8, MXFP4 | Layer name patterns to keep in BF16/FP16 |
 | `activation_scheme` | FP8, Int8 | The runtime value `"dynamic"` selects online activation scaling |
 | `weight_block_size` | FP8 | Optional block-wise FP8 weight quantization size |
+| `num_bf16_fallback_layers` | MXFP4 DualScale | Leading transformer blocks to keep in BF16 for online `mxfp4_dualscale`; defaults to `5` |
 
 ## Validation and Notes
 
@@ -91,3 +104,5 @@ config = build_quant_config({
    model as supported.
 4. If a model already ships quantized weights, use the matching pre-quantized
    method guide instead of online quantization.
+5. For Ascend MXFP4 deployments, prefer offline `mxfp4_dualscale` checkpoints
+   when production quality is more important than avoiding preprocessing.

docs/user_guide/quantization/overview.md

@@ -1,4 +1,4 @@
-# Quantization
+# Quantization
 
 vLLM-Omni exposes quantization through the unified `quantization_config`
 path. The same configuration entrypoint is used across diffusion-only models,
@@ -9,19 +9,20 @@ type has a different quantization scope.
 
 | Mode | Guide | Description | Methods |
 |------|-------|-------------|---------|
-| Online quantization | [Online Quantization](online.md) | vLLM-Omni computes quantized weights and scales while loading the model. | FP8 W8A8, Int8 W8A8 |
-| Pre-quantized checkpoints | Method-specific guides | The checkpoint or an offline quantizer provides quantized weights and scales before serving. | GGUF, AutoRound, msModelSlim, serialized Int8 |
+| Online quantization | [Online Quantization](online.md) | vLLM-Omni computes quantized weights and scales while loading the model. | FP8 W8A8, Int8 W8A8, MXFP8 W8A8, MXFP4 W4A4 |
+| Runtime attention quantization | [Quantized KV Cache](quantized_kvcache.md) | vLLM-Omni dynamically quantizes eligible diffusion Flash Attention tensors during inference. | FP8 FA |
+| Pre-quantized checkpoints | Method-specific guides | The checkpoint or an offline quantizer provides quantized weights and scales before serving. | ModelOpt, GGUF, AutoRound, msModelSlim, serialized Int8, offline MXFP8, offline MXFP4 DualScale |
 
 ## Hardware Support
 
-| Device | FP8 W8A8 | Int8 W8A8 | GGUF | AutoRound | msModelSlim |
-|--------|----------|-----------|------|-----------|-------------|
-| NVIDIA Blackwell GPU (SM 100+) | ✅ | ✅ | ✅ | ✅ | ❌ |
-| NVIDIA Ada/Hopper GPU (SM 89+) | ✅ | ✅ | ✅ | ✅ | ❌ |
-| NVIDIA Ampere GPU (SM 80+) | ✅ | ✅ | ✅ | ✅ | ❌ |
-| AMD ROCm | ⭕ | ⭕ | ⭕ | ⭕ | ❌ |
-| Intel XPU | ⭕ | ⭕ | ⭕ | ✅ | ❌ |
-| Ascend NPU | ❌ | ✅ | ❌ | ❌ | ✅ |
+| Device | FP8 W8A8 | Int8 W8A8 | ModelOpt | MXFP8 W8A8 | MXFP4 W4A4 | GGUF | AutoRound | msModelSlim |
+|--------|----------|-----------|----------|------------|------------|------|-----------|-------------|
+| NVIDIA Blackwell GPU (SM 100+) | ✅ | ✅ | ✅ | ⭕ | ⭕ | ✅ | ✅ | ❌ |
+| NVIDIA Ada/Hopper GPU (SM 89+) | ✅ | ✅ | ✅ | ⭕ | ⭕ | ✅ | ✅ | ❌ |
+| NVIDIA Ampere GPU (SM 80+) | ✅ | ✅ | ⭕ | ⭕ | ⭕ | ✅ | ✅ | ❌ |
+| AMD ROCm | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ❌ |
+| Intel XPU | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ✅ | ❌ |
+| Ascend NPU | ❌ | ✅ | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ |
 
 Legend: `✅` supported, `❌` unsupported, `⭕` not verified in this
 guide. FP8 on Ampere may use a weight-only path where available.
@@ -39,6 +40,9 @@ otherwise.
 |--------|-------|------|----------------|--------|
 | FP8 W8A8 | [FP8](fp8.md) | Online W8A8 or checkpoint FP8 | Qwen-Image; Wan2.2 is not validated | Validated for Qwen-Image family and other DiT models |
 | Int8 W8A8 | [Int8](int8.md) | Online or serialized W8A8 | Qwen-Image; Wan2.2 is not validated | Validated for Qwen-Image and Z-Image |
+| ModelOpt | [ModelOpt](modelopt.md) | Pre-quantized FP8 checkpoints | Qwen-Image, Z-Image, FLUX.2, HunyuanImage-3.0 | Validated for ModelOpt FP8 diffusion checkpoints |
+| MXFP8 W8A8 | [MXFP8](mxfp8.md) | Online W8A8 or offline pre-quantized | Wan2.2-T2V-A14B, I2V-A14B, TI2V-5B | Ascend NPU only; validated for Wan2.2 |
+| MXFP4 W4A4 | [MXFP4](mxfp4.md) | `mxfp4`: online single-scale only; `mxfp4_dualscale`: online or offline dual-scale (offline recommended) | Wan2.2-T2V-A14B, I2V-A14B | Ascend NPU only; validated for Wan2.2 A14B cascade models; TI2V-5B not supported; offline `mxfp4_dualscale` uses calibrated `mul_scale` for best accuracy |
 | GGUF | [GGUF](gguf.md) | Pre-quantized transformer weights | Qwen-Image | Validated where a model-specific GGUF adapter exists |
 | AutoRound | [AutoRound](autoround.md) | Pre-quantized W4A16 checkpoints | FLUX.1-dev; Qwen-Image/Wan2.2 not validated | Checkpoint-driven |
 | msModelSlim | [msModelSlim](msmodelslim.md) | Pre-quantized Ascend checkpoints | Wan2.2 recipe; HunyuanImage-3.0 inference target | Ascend/NPU path |
@@ -52,8 +56,10 @@ in BF16 unless the model guide explicitly adds support.
 
 | Method | Guide | Scope | Example models | Status |
 |--------|-------|-------|----------------|--------|
-| FP8 | [FP8](fp8.md) | Thinker or language-model checkpoint config | Qwen3-Omni thinker | ModelOpt checkpoint path |
+| ModelOpt | [ModelOpt](modelopt.md) | Thinker or language-model checkpoint config | Qwen3-Omni thinker | ModelOpt checkpoint path |
 | Int8 | [Int8](int8.md) | Not currently validated for omni/TTS stages | Qwen3-Omni, Qwen3-TTS | Not validated |
+| MXFP8 | [MXFP8](mxfp8.md) | Not currently validated for omni/TTS stages | Qwen3-Omni, Qwen3-TTS | Not validated |
+| MXFP4 | [MXFP4](mxfp4.md) | Not currently validated for omni/TTS stages | Qwen3-Omni, Qwen3-TTS | Not validated |
 | GGUF | [GGUF](gguf.md) | Not currently validated for omni/TTS stages | Qwen3-Omni, Qwen3-TTS | Not validated |
 | AutoRound | [AutoRound](autoround.md) | Thinker or language-model checkpoint config | Qwen2.5-Omni, Qwen3-Omni | Supported through AutoRound checkpoints |
 | msModelSlim | [msModelSlim](msmodelslim.md) | Not currently validated for omni/TTS stages | Qwen3-Omni, Qwen3-TTS | Not validated |
@@ -67,6 +73,9 @@ attached to the intended stage rather than applied globally.
 |--------|-------|-------|----------------|--------|
 | FP8 | [FP8](fp8.md) | Stage-specific DiT or transformer module | BAGEL, GLM-Image | Requires model-specific validation |
 | Int8 | [Int8](int8.md) | Stage-specific DiT or transformer module | BAGEL, GLM-Image | Requires model-specific validation |
+| ModelOpt | [ModelOpt](modelopt.md) | Checkpoint-defined diffusion stage | BAGEL, GLM-Image | Requires model-specific validation |
+| MXFP8 | [MXFP8](mxfp8.md) | Stage-specific DiT or transformer module | BAGEL, GLM-Image | Not validated |
+| MXFP4 | [MXFP4](mxfp4.md) | Stage-specific DiT or transformer module | BAGEL, GLM-Image | Not validated |
 | GGUF | [GGUF](gguf.md) | Stage-specific transformer weights | BAGEL, GLM-Image | No validated adapter listed |
 | AutoRound | [AutoRound](autoround.md) | Checkpoint-defined stage | BAGEL, GLM-Image | No validated checkpoint listed |
 | msModelSlim | [msModelSlim](msmodelslim.md) | Ascend-generated stage weights | GLM-Image | Requires model-specific adaptation |
@@ -94,7 +103,7 @@ config = build_quant_config({
 
 | Component | Default quantized? | Notes |
 |-----------|--------------------|-------|
-| Diffusion transformer | Yes | Primary target for FP8, Int8, GGUF, AutoRound, and msModelSlim |
+| Diffusion transformer | Yes | Primary target for FP8, Int8, ModelOpt, MXFP8, MXFP4, GGUF, AutoRound, and msModelSlim |
 | Text encoder | No | Keep BF16 unless a method-specific guide documents support |
 | VAE | No | Keep BF16; storage-only paths are method-specific |
 | Scheduler/tokenizer | No | Loaded from the base model repository |
@@ -132,3 +141,98 @@ build_quant_config({"method": "gguf", "gguf_model": "/path/to/model.gguf"})
 build_quant_config({"transformer": {"method": "fp8"}, "vae": None})
 build_quant_config(None)
 ```
+
+## Output Similarity Comparison Tool
+
+Use `vllm_omni.quantization.tools.compare_diffusion_trajectory_similarity`
+to compare a reference diffusion run with a quantized candidate run using the
+same prompt, seed, resolution, scheduler settings, and inference steps. The
+tool compares final decoded images or video frames, and also reports generation
+latency and worker-reported peak memory when available.
+
+This is useful when validating whether online quantization, an offline
+pre-quantized checkpoint, or a new `ignored_layers` choice keeps generation
+quality close to the BF16 reference.
+
+### Online Quantization Example
+
+```bash
+python -m vllm_omni.quantization.tools.compare_diffusion_trajectory_similarity \
+  --task t2i \
+  --model Qwen/Qwen-Image \
+  --candidate-quantization fp8 \
+  --ignored-layers img_mlp \
+  --prompt "a cup of coffee on the table" \
+  --height 512 --width 512 \
+  --num-inference-steps 20 \
+  --seed 142 \
+  --output-json /tmp/qwen_image_fp8_similarity/result.json \
+  --save-output-dir /tmp/qwen_image_fp8_similarity/images \
+  --enforce-eager
+```
+
+### Offline Checkpoint Example
+
+Use `--candidate-model` when the candidate is already quantized or lives at a
+different model path:
+
+```bash
+python -m vllm_omni.quantization.tools.compare_diffusion_trajectory_similarity \
+  --task t2i \
+  --reference-model Qwen/Qwen-Image \
+  --candidate-model /path/to/qwen-image-fp8-checkpoint \
+  --prompt "a cup of coffee on the table" \
+  --height 512 --width 512 \
+  --num-inference-steps 20 \
+  --seed 142 \
+  --output-json /tmp/qwen_image_fp8_checkpoint_similarity/result.json
+```
+
+If the checkpoint does not include a loadable quantization config, pass one
+explicitly:
+
+```bash
+--candidate-quantization-config-json '{"method":"fp8"}'
+```
+
+### Output Metrics
+
+The output JSON includes `output_metrics`, `reference_generation`, and
+`candidate_generation`.
+
+| Metric | Direction | Meaning |
+|--------|-----------|---------|
+| `cosine_similarity` | Higher is better | Vector direction similarity between output pixels or frames. Useful as a broad sanity check. |
+| `mae` | Lower is better | Mean absolute pixel or frame error. For decoded outputs, values are in uint8 pixel units. |
+| `mse` / `rmse` | Lower is better | Squared error and its square root. These penalize localized large differences more than `mae`. |
+| `max_abs` | Lower is better | Worst single-element absolute error. Treat it as an outlier/debug signal, not as a release gate. |
+| `l2` / `relative_l2` | Lower is better | Absolute and reference-normalized L2 distance. `relative_l2` is easier to compare across resolutions. |
+| `psnr_db` | Higher is better | Pixel-space signal-to-noise ratio in dB for uint8 images or frames. |
+| `avg_generation_time_s` | Lower is better | Average wall-clock generation time across measured runs. |
+| `max_peak_memory_mb` | Lower is better | Maximum worker-reported peak device memory across measured runs, when the worker reports it. |
+
+Recommended starting thresholds for same-seed diffusion comparisons:
+
+| Metric | Smoke threshold | Stricter target | Notes |
+|--------|-----------------|-----------------|-------|
+| `psnr_db` | `>= 20.0` | `>= 25.0` | Good for quick image or frame regression checks. |
+| `mae` | `<= 12.0` | `<= 6.0` | Interpreted in decoded uint8 pixel units. |
+| `cosine_similarity` | `>= 0.98` | `>= 0.995` | Less sensitive to global scale than L2-style metrics. |
+| `relative_l2` | `<= 0.20` | `<= 0.08` | Useful when comparing across prompts or resolutions. |
+
+These thresholds are heuristics. Tune them by model family, task, resolution,
+quantization method, and deployment tolerance. For release gating, pair the
+numeric report with visual inspection of saved reference and candidate outputs.
+
+The tool intentionally reports separate quality, latency, and memory metrics
+instead of a single consolidated similarity score. A single score can hide
+important tradeoffs, for example a candidate with good PSNR but a meaningful
+memory regression, or a candidate with low average error but localized visual
+artifacts. If you need a project-specific pass/fail gate, define it as an
+explicit policy over the individual metrics.
+
+Pixel-level metrics do not measure semantic consistency. For higher-cost
+evaluation, you can complement this report with a vision-language judge that
+describes the reference and candidate outputs and compares those descriptions.
+Keep that semantic check separate from this lightweight tool so users can
+choose whether the additional model cost and latency are appropriate.

docs/user_guide/quantization/quantized_kvcache.md

@@ -0,0 +1,125 @@
+# Quantized KV Cache
+
+## Overview
+
+In DiT-based image and video generation, Flash Attention can take a large share
+of denoising time, especially for high-resolution or long-frame workloads.
+vLLM-Omni supports online FP8 quantization for eligible diffusion Flash
+Attention (FA) to reduce FA latency while keeping model weights in their
+original dtype.
+
+This feature is configured through `diffusion_kv_cache_dtype` on
+`OmniDiffusionConfig` (CLI: `--diffusion-kv-cache-dtype`). It is intentionally
+**not** the same as vLLM's `--kv-cache-dtype`, which controls autoregressive
+language-model KV cache storage and defaults to `"auto"`. Diffusion FA
+quantization uses the dedicated diffusion flags so omni serve does not inherit
+that default.
+
+In vLLM-Omni diffusion pipelines, this is a runtime FA path: Q/K/V tensors are
+dynamically quantized before the attention operator. It does not quantize model
+weights and is separate from [FP8 W8A8](fp8.md), [Int8 W8A8](int8.md), or
+pre-quantized checkpoint formats.
+
+If `diffusion_kv_cache_dtype` is not set, behavior is unchanged and attention
+runs in the native dtype.
+
+## Hardware Support
+
+| Device | FP8 FA |
+|--------|--------|
+| Ascend NPU | ✅ |
+| NVIDIA GPU | ❌ |
+| AMD ROCm | ❌ |
+| Intel XPU | ❌ |
+
+Legend: `✅` supported, `❌` unsupported.
+
+FP8 FA is currently implemented only for the NPU Flash Attention backend. Other
+backends do not support `diffusion_kv_cache_dtype="fp8"` for diffusion attention
+and fall back to native dtype execution.
+
+## Model Type Support
+
+### Diffusion Model
+
+| Model | Scope | Status | Notes |
+|-------|-------|--------|-------|
+| Wan2.2 | Eligible DiT full-attention FA on Ascend NPU | Tested | Compare quality and latency against a BF16 baseline before production use |
+| Other diffusion models | Eligible DiT full-attention FA on Ascend NPU | Not tested | You can try `diffusion_kv_cache_dtype="fp8"`; tune `diffusion_kv_cache_skip_steps` and `diffusion_kv_cache_skip_layers` when higher precision is needed |
+
+### Multi-Stage Omni/TTS Model (Qwen3-Omni, Qwen3-TTS)
+
+Not tested for FP8 FA. Treat any use as experimental unless a model-specific
+guide documents support.
+
+### Multi-Stage Diffusion Model (BAGEL, GLM-Image)
+
+Not tested. If the diffusion stage uses the same NPU Flash Attention backend,
+`diffusion_kv_cache_dtype` may apply in theory; validate quality and latency for
+each stage and model.
+
+## Configuration
+
+Offline diffusion example:
+
+```bash
+python examples/offline_inference/image_to_video/image_to_video.py \
+    --model <your-wan2.2-model> \
+    --prompt "A cat sitting on a surfboard at the beach" \
+    --height 1280 \
+    --width 720 \
+    --num-frames 61 \
+    --num-inference-steps 4 \
+    --ulysses-degree 4 \
+    --vae-patch-parallel-size 4 \
+    --diffusion-kv-cache-dtype fp8 \
+    --diffusion-kv-cache-skip-steps "0,1" \
+    --diffusion-kv-cache-skip-layers "0-2"
+```
+
+Online serving:
+
+```bash
+vllm serve <your-model> --omni --diffusion-kv-cache-dtype fp8
+```
+
+Stage config:
+
+```yaml
+stage_args:
+  - stage_id: 0
+    stage_type: diffusion
+    engine_args:
+      model_stage: dit
+      diffusion_kv_cache_dtype: "fp8"
+      diffusion_kv_cache_skip_steps: "0,1"
+      diffusion_kv_cache_skip_layers: "0-2"
+```
+
+Legacy YAML keys `kv_cache_dtype`, `kv_cache_skip_steps`, and
+`kv_cache_skip_layers` are still accepted when constructing
+`OmniDiffusionConfig` (for example via `from_kwargs`); prefer the `diffusion_*`
+names for new configs.
+
+## Parameters
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| `diffusion_kv_cache_dtype` | str \| None | `None` | Set to `"fp8"` to enable dynamic FP8 FA on supported attention backends |
+| `diffusion_kv_cache_skip_steps` | str \| None | `None` | Denoising step selector to keep in native dtype, for example `"0,1,4-6"` |
+| `diffusion_kv_cache_skip_layers` | str \| None | `None` | Transformer layer selector to keep in native dtype, for example `"0-2,10"` |
+
+Selectors use comma-separated integers and inclusive ranges. Listed steps or
+layers skip FP8 FA; all other eligible full-attention forwards use the FP8 path.
+
+## Validation and Notes
+
+1. Compare generated images or videos against a BF16 baseline with the same
+   seed, prompt, resolution, frame count, and denoising steps.
+2. Use `diffusion_kv_cache_skip_steps` for denoising steps where quality is more
+   sensitive.
+3. Use `diffusion_kv_cache_skip_layers` for transformer layers that show visible quality
+   regressions.
+4. Report both latency and quality results when enabling this option for a new
+   model. For image or video models, include visual comparison and quantitative
+   metrics when available, such as PSNR or SSIM.

examples/offline_inference/bagel/README.md

@@ -195,6 +195,25 @@ stages:
     devices: "0,1"
 ```
 
+#### Hybrid Sharded Data Parallel (HSDP)
+
+For larger Bagel deployments on multiple GPUs, you can enable HSDP (Hybrid Sharded Data Parallel) by modifying the stage configuration (for example, [`bagel.yaml`](../../../vllm_omni/deploy/bagel.yaml)). HSDP shards transformer weights across GPUs to reduce per-GPU memory usage.
+
+1. **Enable HSDP**: Set `use_hsdp: true`.
+2. **Set shard size**: Set `hsdp_shard_size` to the number of GPUs used for sharding (for example, `4`).
+3. **Set replicate size**: Usually keep `hsdp_replicate_size: 1` unless you want replicated HSDP groups.
+4. **Set devices**: Specify the comma-separated GPU IDs used by the diffusion stage (for example, `"0,1,2,3"`).
+
+Example configuration for HSDP across 4 GPUs:
+```yaml
+  - stage_id: 1
+    devices: "0,1,2,3"
+    parallel_config:
+      use_hsdp: true
+      hsdp_shard_size: 4
+      hsdp_replicate_size: 1
+```
+
 Then pass the custom deploy YAML:
 
 ```bash

examples/offline_inference/covo_audio/README.md

@@ -0,0 +1,76 @@
+# Covo-Audio-Chat (Offline Inference)
+
+## Setup
+
+Please refer to the [stage configuration documentation](https://docs.vllm.ai/projects/vllm-omni/en/latest/configuration/stage_configs/) to configure memory allocation appropriately for your hardware setup.
+
+> **Note**
+> Covo-Audio code2wav requires `torchdiffeq`. Install it with: `pip install torchdiffeq`
+
+## Run examples
+
+Get into the example folder:
+```bash
+cd examples/offline_inference/covo_audio
+```
+
+### Audio input chat
+
+Using the default audio asset:
+```bash
+python end2end.py
+```
+
+Using a custom audio file:
+```bash
+python end2end.py --audio-path /path/to/audio.wav
+```
+
+Using a local model:
+```bash
+python end2end.py -m /path/to/Covo-Audio-Chat --output-dir ./my_output
+```
+
+### Command-line Arguments
+
+| Argument | Short | Default | Description |
+|----------|-------|---------|-------------|
+| `--model-name` | `-m` | `tencent/Covo-Audio-Chat` | Model path or HuggingFace model ID |
+| `--text` | `-t` | `请回答这段音频里的问题。` | Text prompt / question for the audio |
+| `--audio-path` | `-a` | default audio asset | Path to local audio file |
+| `--sampling-rate` | | `16000` | Sampling rate for audio loading (Hz) |
+| `--output-dir` | | `./output_audio` | Output directory for generated files |
+| `--num-prompts` | | `1` | Number of prompts to generate |
+| `--stage-configs-path` | | (auto) | Path to stage configs YAML file |
+| `--log-stats` | | `false` | Enable detailed statistics logging |
+| `--stage-init-timeout` | | `300` | Stage initialization timeout (seconds) |
+| `--batch-timeout` | | `5` | Batching timeout (seconds) |
+| `--init-timeout` | | `300` | Overall initialization timeout (seconds) |
+| `--shm-threshold-bytes` | | `65536` | Shared memory threshold (bytes) |
+
+## Pipeline
+
+Covo-Audio-Chat uses a 2-stage pipeline:
+
+- **Stage 0 (fused_thinker_talker):** The 7B LLM generates interleaved text and audio tokens in a single autoregressive pass.
+- **Stage 1 (code2wav):** A BigVGAN-based vocoder converts the extracted audio codes into a 24kHz WAV waveform.
+
+## Output
+
+The script generates two files per request in the output directory:
+
+- `{request_id}.txt` -- prompt and generated text
+- `{request_id}.wav` -- generated audio (24kHz WAV)
+
+## FAQ
+
+If you encounter `ModuleNotFoundError: No module named 'librosa'`, install it with:
+```bash
+pip install librosa
+```
+
+## Environment
+
+- GPU: 1x A100 (80 GiB)
+- Stage 0 (7B LLM): ~16 GiB VRAM
+- Stage 1 (BigVGAN vocoder): ~2 GiB VRAM

examples/offline_inference/covo_audio/end2end.py

@@ -0,0 +1,222 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+"""
+This example shows how to use vLLM-Omni for running offline inference
+with the correct prompt format on Covo-Audio-Chat.
+
+Usage:
+    python end2end.py --audio-path /path/to/audio.wav
+"""
+
+import os
+
+import soundfile as sf
+from vllm.assets.audio import AudioAsset
+from vllm.multimodal.media.audio import load_audio
+from vllm.sampling_params import SamplingParams
+from vllm.utils.argparse_utils import FlexibleArgumentParser
+
+from vllm_omni.entrypoints.omni import Omni
+from vllm_omni.model_executor.models.covo_audio.prompt_utils import (
+    COVO_AUDIO_INPUT_PREFIX,
+    build_covo_audio_chat_prompt,
+)
+
+SEED = 42
+
+
+def get_audio_query(
+    question: str | None = None,
+    audio_path: str | None = None,
+    sampling_rate: int = 16000,
+) -> dict:
+    if question is None:
+        question = "请回答这段音频里的问题。"
+    user_content = COVO_AUDIO_INPUT_PREFIX + question
+    prompt = build_covo_audio_chat_prompt(user_content)
+
+    if audio_path is None:
+        audio_data = AudioAsset("mary_had_lamb").audio_and_sample_rate
+    else:
+        import numpy as np
+
+        audio_signal, sr = load_audio(audio_path, sr=sampling_rate)
+        audio_data = (audio_signal.astype(np.float32), sr)
+
+    return {
+        "prompt": prompt,
+        "multi_modal_data": {"audio": audio_data},
+        "modalities": ["audio"],
+    }
+
+
+def main(args):
+    query_result = get_audio_query(
+        question=args.text,
+        audio_path=args.audio_path,
+        sampling_rate=args.sampling_rate,
+    )
+
+    omni = Omni(
+        model=args.model_name,
+        stage_configs_path=args.stage_configs_path,
+        log_stats=args.log_stats,
+        stage_init_timeout=args.stage_init_timeout,
+        batch_timeout=args.batch_timeout,
+        init_timeout=args.init_timeout,
+        shm_threshold_bytes=args.shm_threshold_bytes,
+    )
+
+    # Stage 0: fused_thinker_talker
+    # stop_token_ids=[151645] (<|im_end|>) and ignore_eos=True are required
+    # so the model generates interleaved text+audio tokens before stopping.
+    thinker_sampling_params = SamplingParams(
+        temperature=0.0,
+        top_p=1.0,
+        top_k=-1,
+        max_tokens=2048,
+        seed=SEED,
+        detokenize=True,
+        repetition_penalty=1.05,
+        stop_token_ids=[151645],
+        ignore_eos=True,
+    )
+    # Stage 1: code2wav (audio codes, not real token IDs — skip detokenize)
+    code2wav_sampling_params = SamplingParams(
+        temperature=0.0,
+        top_p=1.0,
+        top_k=-1,
+        max_tokens=2048,
+        seed=SEED,
+        detokenize=False,
+        repetition_penalty=1.1,
+    )
+
+    sampling_params_list = [
+        thinker_sampling_params,
+        code2wav_sampling_params,
+    ]
+
+    prompts = [query_result for _ in range(args.num_prompts)]
+
+    omni_outputs = omni.generate(prompts, sampling_params_list)
+
+    output_dir = args.output_dir
+    os.makedirs(output_dir, exist_ok=True)
+
+    for stage_outputs in omni_outputs:
+        output = stage_outputs.request_output
+        if stage_outputs.final_output_type == "text":
+            request_id = output.request_id
+            text_output = output.outputs[0].text
+            prompt_text = output.prompt
+            out_txt = os.path.join(output_dir, f"{request_id}.txt")
+            lines = [
+                "Prompt:\n",
+                str(prompt_text) + "\n",
+                "vllm_text_output:\n",
+                str(text_output).strip() + "\n",
+            ]
+            try:
+                with open(out_txt, "w", encoding="utf-8") as f:
+                    f.writelines(lines)
+            except Exception as e:
+                print(f"[Warn] Failed writing text file {out_txt}: {e}")
+            print(f"Request ID: {request_id}, Text saved to {out_txt}")
+        elif stage_outputs.final_output_type == "audio":
+            request_id = output.request_id
+            audio_tensor = output.outputs[0].multimodal_output.get("audio")
+            if audio_tensor is None:
+                continue
+            output_wav = os.path.join(output_dir, f"{request_id}.wav")
+            audio_numpy = audio_tensor.float().detach().cpu().numpy()
+            if audio_numpy.ndim > 1:
+                audio_numpy = audio_numpy.flatten()
+            sf.write(output_wav, audio_numpy, samplerate=24000, format="WAV")
+            print(f"Request ID: {request_id}, Audio saved to {output_wav}")
+
+    omni.close()
+
+
+def parse_args():
+    parser = FlexibleArgumentParser(description="Offline inference demo for Covo-Audio-Chat")
+    parser.add_argument(
+        "--model-name",
+        "-m",
+        type=str,
+        default="tencent/Covo-Audio-Chat",
+        help="Model path or HuggingFace model ID.",
+    )
+    parser.add_argument(
+        "--text",
+        "-t",
+        type=str,
+        default=None,
+        help="Text prompt / question for the audio.",
+    )
+    parser.add_argument(
+        "--audio-path",
+        "-a",
+        type=str,
+        default=None,
+        help="Path to local audio file. Uses default asset if not provided.",
+    )
+    parser.add_argument(
+        "--sampling-rate",
+        type=int,
+        default=16000,
+        help="Sampling rate for audio loading (default: 16000).",
+    )
+    parser.add_argument(
+        "--stage-configs-path",
+        type=str,
+        default=None,
+        help="Path to stage configs YAML file.",
+    )
+    parser.add_argument(
+        "--log-stats",
+        action="store_true",
+        default=False,
+        help="Enable writing detailed statistics.",
+    )
+    parser.add_argument(
+        "--stage-init-timeout",
+        type=int,
+        default=300,
+        help="Timeout for initializing a single stage in seconds.",
+    )
+    parser.add_argument(
+        "--batch-timeout",
+        type=int,
+        default=5,
+        help="Timeout for batching in seconds.",
+    )
+    parser.add_argument(
+        "--init-timeout",
+        type=int,
+        default=300,
+        help="Timeout for initializing stages in seconds.",
+    )
+    parser.add_argument(
+        "--shm-threshold-bytes",
+        type=int,
+        default=65536,
+        help="Threshold for using shared memory in bytes.",
+    )
+    parser.add_argument(
+        "--output-dir",
+        default="./output_audio",
+        help="Output directory for generated files.",
+    )
+    parser.add_argument(
+        "--num-prompts",
+        type=int,
+        default=1,
+        help="Number of prompts to generate.",
+    )
+    return parser.parse_args()
+
+
+if __name__ == "__main__":
+    args = parse_args()
+    main(args)

examples/offline_inference/hunyuan_image3/README.md

@@ -1,172 +1,155 @@
 # HunyuanImage-3.0-Instruct
 
-## Set up
+This example runs HunyuanImage-3.0-Instruct offline with the unified deploy
+YAMLs under `vllm_omni/deploy/`.
 
-Please refer to the [stage configuration documentation](https://docs.vllm.ai/projects/vllm-omni/en/latest/configuration/stage_configs/) to configure memory allocation appropriately for your hardware setup.
+## Deploy Configs
 
-## Run examples
+| File | Topology | Default use |
+| :--- | :--- | :--- |
+| `vllm_omni/deploy/hunyuan_image3.yaml` | AR + DiT | Default for `text2img` and `img2img`. |
+| `vllm_omni/deploy/hunyuan_image3_ar.yaml` | AR only | Default for `img2text` and `text2text`. |
+| `vllm_omni/deploy/hunyuan_image3_dit.yaml` | DiT only | Standalone diffusion stage. Pass it explicitly with `--deploy-config`. |
 
-**Note**: These examples work with the default configuration on **8x NVIDIA L40S (48GB)**. For different GPU setups, modify the stage configuration to adjust device allocation and memory utilization.
+The example chooses a deploy config automatically when `--deploy-config` and
+`--stage-configs-path` are both omitted:
 
-Get into the hunyuan_image3 folder:
+| `--modality` | `mode` passed to Omni | Default deploy |
+| :--- | :--- | :--- |
+| `text2img` | `text-to-image` | `hunyuan_image3.yaml` |
+| `img2img` | `image-editing` | `hunyuan_image3.yaml` |
+| `img2text` | `image-to-text` | `hunyuan_image3_ar.yaml` |
+| `text2text` | `text-to-text` | `hunyuan_image3_ar.yaml` |
+
+`--modality` is an offline example convenience flag. It maps to the internal
+`mode` argument passed to `Omni(...)` by this script. HunyuanImage3 uses
+separate deploy YAMLs for AR + DiT, AR-only, and DiT-only topologies, so the
+stage topology is selected by the deploy file rather than by YAML mode
+overrides.
+
+Online serving does not expose a `--modality` flag or accept `mode` as an API
+request field. Choose the deploy topology when starting the server with
+`--deploy-config`, then use the OpenAI-compatible endpoint and request shape for
+the scenario. The `modalities` request field is used by the chat completions
+path; the image endpoints infer the image task from the endpoint and payload.
+
+| Online scenario | Server deploy | Request |
+| :--- | :--- | :--- |
+| Text to image | `--deploy-config vllm_omni/deploy/hunyuan_image3.yaml` | `POST /v1/images/generations`, or `POST /v1/chat/completions` with `"modalities": ["image"]`. |
+| Image editing | `--deploy-config vllm_omni/deploy/hunyuan_image3.yaml` | `POST /v1/images/edits`. |
+| Image/text to text | `--deploy-config vllm_omni/deploy/hunyuan_image3_ar.yaml` | `POST /v1/chat/completions` for text output, for example with `"modalities": ["text"]`. |
+| DiT-only image generation | `--deploy-config vllm_omni/deploy/hunyuan_image3_dit.yaml` | `POST /v1/images/generations`. |
+
+## Run Examples
+
+Text to image, using the default AR + DiT deploy:
 
 ```bash
-cd examples/offline_inference/hunyuan_image3
+python examples/offline_inference/hunyuan_image3/end2end.py \
+  --model tencent/HunyuanImage-3.0-Instruct \
+  --modality text2img \
+  --prompts "A cute cat sitting on a windowsill watching the sunset"
 ```
 
-### Modality Control
-
-HunyuanImage-3.0-Instruct supports multiple modality modes. You can control the mode using the `--modality` argument:
-
-#### Text to Image (text2img)
-
-- **Pipeline**: Text → AR (CoT + latent tokens) → DiT (denoise) → VAE Decode → Image
-- **Stages Used**: Stage 0 (AR) + Stage 1 (DiT)
-- **KV Transfer**: AR sends KV cache to DiT for conditioned generation
-- **Default Config**: `hunyuan_image3_t2i.yaml`
+Image editing, using the default AR + DiT deploy:
 
 ```bash
-python end2end.py --model tencent/HunyuanImage-3.0-Instruct \
-                  --modality text2img \
-                  --prompts "A cute cat sitting on a windowsill watching the sunset"
+python examples/offline_inference/hunyuan_image3/end2end.py \
+  --model tencent/HunyuanImage-3.0-Instruct \
+  --modality img2img \
+  --image-path /path/to/image.png \
+  --prompts "Make the petals neon pink"
 ```
 
-**With VAE tiling (required on A100 GPUs):**
-```bash
-python end2end.py --model tencent/HunyuanImage-3.0-Instruct \
-                  --modality text2img \
-                  --prompts "A cute cat sitting on a windowsill watching the sunset" \
-                  --vae-use-tiling
-```
-
-#### Image to Image (img2img)
-
-- **Pipeline**: Image + Text → AR (CoT + recaption + latent) → DiT → Edited Image
-- **Stages Used**: Stage 0 (AR) + Stage 1 (DiT)
-- **KV Transfer**: AR sends KV cache to DiT
-- **Default Config**: `hunyuan_image3_it2i.yaml`
+Image to text, using the AR-only deploy:
 
 ```bash
-python end2end.py --model tencent/HunyuanImage-3.0-Instruct \
-                  --modality img2img \
-                  --image-path /path/to/image.png \
-                  --prompts "Make the petals neon pink"
+python examples/offline_inference/hunyuan_image3/end2end.py \
+  --model tencent/HunyuanImage-3.0-Instruct \
+  --modality img2text \
+  --image-path /path/to/image.jpg \
+  --prompts "Describe the content of the picture."
 ```
 
-#### Image to Text (img2text)
-
-- **Pipeline**: Image + Question → AR → Text description
-- **Stages Used**: Stage 0 (AR) only
-- **Default Config**: `hunyuan_image3_i2t.yaml`
+Text to text, using the AR-only deploy:
 
 ```bash
-python end2end.py --model tencent/HunyuanImage-3.0-Instruct \
-                  --modality img2text \
-                  --image-path /path/to/image.jpg \
-                  --prompts "Describe the content of the picture."
+python examples/offline_inference/hunyuan_image3/end2end.py \
+  --model tencent/HunyuanImage-3.0-Instruct \
+  --modality text2text \
+  --prompts "What is the capital of France?"
 ```
 
-#### Text to Text (text2text)
-
-- **Pipeline**: Text → AR → Text
-- **Stages Used**: Stage 0 (AR) only
-- **Default Config**: `hunyuan_image3_t2t.yaml`
+Standalone DiT, using the DiT-only deploy explicitly:
 
 ```bash
-python end2end.py --model tencent/HunyuanImage-3.0-Instruct \
-                  --modality text2text \
-                  --prompts "What is the capital of France?"
+python examples/offline_inference/hunyuan_image3/end2end.py \
+  --model tencent/HunyuanImage-3.0-Instruct \
+  --modality text2img \
+  --deploy-config vllm_omni/deploy/hunyuan_image3_dit.yaml \
+  --prompts "A cinematic portrait of an astronaut in a greenhouse"
 ```
 
-### Inference Steps & Guidance
+Override the default full AR + DiT deploy explicitly:
 
-Control generation quality for image modalities:
+```bash
+python examples/offline_inference/hunyuan_image3/end2end.py \
+  --model tencent/HunyuanImage-3.0-Instruct \
+  --modality text2img \
+  --deploy-config vllm_omni/deploy/hunyuan_image3.yaml \
+  --prompts "A cute cat"
+```
+
+## Additional Config
+
+You can pass diffusion worker `additional_config` from the offline example as a JSON object.
+This maps to the upstream vLLM `VllmConfig.additional_config` platform extension field:
+https://docs.vllm.ai/en/stable/api/vllm/config/#vllm.config.VllmConfig.additional_config
 
 ```bash
 python end2end.py --modality text2img \
-                  --steps 50 \
-                  --guidance-scale 5.0 \
-                  --height 1024 --width 1024 \
-                  --prompts "A photo-realistic sunset over the ocean"
+                  --prompts "A cute cat" \
+                  --additional-config '{"torchair_graph_config":{"enabled":true}}'
 ```
 
-### Key Arguments
 
-#### 📌 Command Line Arguments (end2end.py)
+## Key Arguments
 
-| Argument               | Type   | Default                              | Description                                                  |
-| :--------------------- | :----- | :----------------------------------- | :----------------------------------------------------------- |
-| `--model`              | string | `tencent/HunyuanImage-3.0-Instruct` | Model path or name                                           |
-| `--modality`           | choice | `text2img`                           | Modality: `text2img`, `img2img`, `img2text`, `text2text`     |
-| `--prompts`            | list   | `None`                               | Input text prompts                                           |
-| `--image-path`         | string | `None`                               | Input image path (for `img2img`/`img2text`)                  |
-| `--output`             | string | `.`                                  | Output directory for saved images                            |
-| `--steps`              | int    | `50`                                 | Number of inference steps                                    |
-| `--guidance-scale`     | float  | `5.0`                                | Classifier-free guidance scale                               |
-| `--seed`               | int    | `42`                                 | Random seed                                                  |
-| `--height`             | int    | `1024`                               | Output image height                                          |
-| `--width`              | int    | `1024`                               | Output image width                                           |
-| `--bot-task`           | string | auto                                 | Override prompt task (e.g. `it2i_think`, `t2i_recaption`)    |
-| `--sys-type`           | string | auto                                 | Override system prompt type (e.g. `en_unified`, `en_vanilla`) |
-| `--stage-configs-path` | string | auto                                 | Custom stage config YAML path                                |
-| `--enforce-eager`      | flag   | `False`                              | Disable torch.compile                                        |
-| `--init-timeout`       | int    | `300`                                | Initialization timeout (seconds)                             |
-| `--vae-use-tiling`     | flag   | `False`                              | Enable VAE tiling for memory optimization (required to avoid OOM on A100) |
+| Argument | Description |
+| :--- | :--- |
+| `--deploy-config` | Preferred config path for unified deploy YAMLs. |
+| `--stage-configs-path` | Legacy stage config path, kept only for compatibility. Prefer `--deploy-config`. |
+| `--additional-config` | JSON object forwarded to diffusion worker `additional_config`. |
+| `--modality` | Offline-only convenience flag. One of `text2img`, `img2img`, `img2text`, `text2text`. It selects prompt formatting, internal `mode`, and default deploy config for this script. Online serving uses `--deploy-config` plus the endpoint and, for chat completions, request `modalities` instead. |
+| `--steps` | Number of diffusion inference steps for image generation. |
+| `--guidance-scale` | Classifier-free guidance scale for image generation. |
+| `--height`, `--width` | Output image size for `text2img`. |
+| `--bot-task` | Override prompt mode. `none`, `think`, `recaption`, `think_recaption`, or `vanilla`. |
+| `--sys-type` | Override the system prompt type, for example `en_unified` or `en_vanilla`. |
+| `--vae-use-tiling` | Enable VAE tiling for memory reduction. |
 
-------
+## Notes
 
-#### ⚙️ Stage Configurations
-
-| Config YAML                         | Modality  | Stages | GPUs   | Description                           |
-| :---------------------------------- | :-------- | :----- | :----- | :------------------------------------ |
-| `hunyuan_image3_t2i.yaml`           | text2img  | 2      | 8      | T2I with AR→DiT, 4 GPU each          |
-| `hunyuan_image3_it2i.yaml`          | img2img   | 2      | 8      | IT2I with AR→DiT, 4 GPU each         |
-| `hunyuan_image3_i2t.yaml`           | img2text  | 1      | 4      | I2T (AR only)                         |
-| `hunyuan_image3_t2t.yaml`           | text2text | 1      | 4      | T2T (AR only)                         |
-| `hunyuan_image3_t2i_2gpu.yaml`      | text2img  | 2      | 2      | T2I for 2-GPU setups                  |
-| `hunyuan_image3_moe.yaml`           | text2img  | 2      | 8      | T2I with MoE AR→DiT KV reuse          |
-| `hunyuan_image3_moe_dit_2gpu_fp8.yaml` | text2img | 2   | 2      | T2I with FP8 quantization             |
-
-------
-
-## Using MoE Config
-
-The `hunyuan_image3_moe.yaml` config enables AR→DiT KV cache reuse with 8 GPUs (4 for AR + 4 for DiT).
-
-```bash
-python end2end.py --model tencent/HunyuanImage-3.0-Instruct \
-                  --modality text2img \
-                  --stage-configs-path hunyuan_image3_moe.yaml \
-                  --prompts "A cute cat"
-```
-
-------
+- `hunyuan_image3_ar.yaml` is a 4-card AR-only text/comprehension deploy.
+- `hunyuan_image3_dit.yaml` is a single-stage DiT deploy with `stage_id: 0`.
+- The old HunyuanImage3 YAMLs under `model_executor/stage_configs/` and `platforms/*/stage_configs/` have been folded into the deploy YAMLs.
 
 ## Prompt Format
 
 HunyuanImage-3.0-Instruct uses an instruct chat template:
 
-```
-<|startoftext|>{system_prompt}\n\nUser: {<img>?}{user_prompt}\n\nAssistant: {trigger_tag?}
+```text
+<|startoftext|>{system_prompt}
+
+User: {<img>?}{user_prompt}
+
+Assistant: {trigger_tag?}
 ```
 
-- `<img>`: Placeholder for each input image (single token; expanded by the multimodal pipeline)
-- Trigger tags: `<think>` (CoT), `<recaption>` (recaptioning) — placed AFTER `Assistant: `
-- System prompt: Auto-selected based on task
-- `t2i_vanilla` is the only task that uses the bare pretrain template (no chat structure)
+- `<img>`: Placeholder for each input image (single token; expanded by the multimodal pipeline).
+- Trigger tags: `<think>` for CoT and `<recaption>` for recaptioning, placed after `Assistant: `.
+- System prompt: Auto-selected from `task` and `bot_task`.
+- `bot_task='vanilla'` with `task='t2i'` uses the bare pretrain template.
 
 The shared `vllm_omni.diffusion.models.hunyuan_image3.prompt_utils.build_prompt_tokens()`
-helper handles segment-by-segment tokenization (matches HF `apply_chat_template` byte-for-byte).
-
-------
-
-## FAQ
-
-- **OOM errors**: Decrease `gpu_memory_utilization` in the YAML stage config, use a smaller `max_num_batched_tokens`, or enable VAE tiling with `--vae-use-tiling` (required on A100 GPUs).
-- **Custom image sizes**: Use `--height` and `--width` flags (multiples of 16 recommended).
-
-| Stage             | VRAM (approx)        |
-| :---------------- | :------------------- |
-| Stage 0 (AR)      | ~15 GiB + KV Cache   |
-| Stage 1 (DiT)     | ~30 GiB              |
-| Total (8-GPU)     | ~45 GiB + KV Cache   |
+helper handles segment-by-segment tokenization and matches HF `apply_chat_template`.

examples/offline_inference/hunyuan_image3/end2end.py

@@ -1,114 +1,111 @@
 """
 HunyuanImage-3.0-Instruct unified end-to-end inference script.
-
-Supports all modalities through a single entry point:
-  - text2img:  Text → AR → DiT → Image
-  - img2img:   Text+Image → AR → DiT → Edited Image (IT2I)
-  - img2text:  Image+Text → AR → Text description (I2T)
-  - text2text: Text → AR → Text (comprehension, no image)
-
-Usage:
-    python end2end.py --modality text2img --prompts "A cute cat"
-    python end2end.py --modality img2img --image-path input.png --prompts "Make it snowy"
-    python end2end.py --modality img2text --image-path input.png --prompts "Describe this image"
 """
 
 import argparse
+import json
 import os
+from pathlib import Path
 
 from vllm_omni.diffusion.models.hunyuan_image3.prompt_utils import (
+    MAX_IMAGES_PER_REQUEST,
     build_prompt_tokens,
+    resolve_stop_token_ids,
+    resolve_sys_type,
 )
 from vllm_omni.entrypoints.omni import Omni
 from vllm_omni.inputs.data import OmniPromptType
 
-# task -> (sys_type, bot_task, trigger_tag)
-_TASK_PRESETS: dict[str, tuple[str, str | None, str | None]] = {
-    "t2t": ("en_unified", None, None),
-    "i2t": ("en_unified", None, None),
-    "it2i_think": ("en_unified", "think", "<think>"),
-    "it2i_recaption": ("en_unified", "recaption", "<recaption>"),
-    "t2i_think": ("en_unified", "think", "<think>"),
-    "t2i_recaption": ("en_unified", "recaption", "<recaption>"),
-    "t2i_vanilla": ("en_vanilla", "image", None),
+_REPO_ROOT = Path(__file__).resolve().parents[3]
+_DEFAULT_DEPLOY_CONFIG = str(_REPO_ROOT / "vllm_omni" / "deploy" / "hunyuan_image3.yaml")
+_DEFAULT_AR_DEPLOY_CONFIG = str(_REPO_ROOT / "vllm_omni" / "deploy" / "hunyuan_image3_ar.yaml")
+
+_MODALITY_TASK_MAP: dict[str, tuple[str, str | None]] = {
+    "text2img": ("t2i", "think"),
+    "img2img": ("it2i", "think"),
+    "img2text": ("i2t", None),
+    "text2text": ("t2t", None),
 }
 
-# Modality → prompt_utils task mapping
-_MODALITY_TASK_MAP = {
-    "text2img": "t2i_think",
-    "img2img": "it2i_think",
-    "img2text": "i2t",
-    "text2text": "t2t",
+_MODALITY_DEFAULT_DEPLOY_CONFIG = {
+    "text2img": _DEFAULT_DEPLOY_CONFIG,
+    "img2img": _DEFAULT_DEPLOY_CONFIG,
+    "img2text": _DEFAULT_AR_DEPLOY_CONFIG,
+    "text2text": _DEFAULT_AR_DEPLOY_CONFIG,
 }
 
-
-# Modality → default stage config
-_MODALITY_DEFAULT_CONFIG = {
-    "text2img": "hunyuan_image3_t2i.yaml",
-    "img2img": "hunyuan_image3_it2i.yaml",
-    "img2text": "hunyuan_image3_i2t.yaml",
-    "text2text": "hunyuan_image3_t2t.yaml",
+_MODALITY_MODE = {
+    "text2img": "text-to-image",
+    "img2img": "image-editing",
+    "img2text": "image-to-text",
+    "text2text": "text-to-text",
 }
 
 
 def parse_args():
     parser = argparse.ArgumentParser(description="HunyuanImage-3.0-Instruct end-to-end inference.")
-    parser.add_argument(
-        "--model",
-        default="tencent/HunyuanImage-3.0-Instruct",
-        help="Model name or local path.",
-    )
+    parser.add_argument("--model", default="tencent/HunyuanImage-3.0-Instruct", help="Model name or local path.")
     parser.add_argument(
         "--modality",
         default="text2img",
-        choices=["text2img", "img2img", "img2text", "text2text"],
-        help="Modality mode to control stage execution.",
+        choices=list(_MODALITY_TASK_MAP),
     )
     parser.add_argument("--prompts", nargs="+", default=None, help="Input text prompts.")
     parser.add_argument(
         "--image-path",
         type=str,
         default=None,
-        help="Path to input image (for img2img/img2text).",
+        help="Input image path(s) for img2img/img2text. Comma-separated for multi-image (up to 3).",
     )
-    parser.add_argument(
-        "--output",
-        type=str,
-        default=".",
-        help="Output directory to save results.",
-    )
-
-    # Generation parameters
+    parser.add_argument("--output", type=str, default=".", help="Output directory to save results.")
     parser.add_argument("--steps", type=int, default=50, help="Number of inference steps.")
     parser.add_argument("--guidance-scale", type=float, default=5.0, help="Classifier-free guidance scale.")
     parser.add_argument("--seed", type=int, default=42, help="Random seed.")
     parser.add_argument("--height", type=int, default=1024, help="Output image height.")
     parser.add_argument("--width", type=int, default=1024, help="Output image width.")
-    parser.add_argument(
-        "--vae-use-tiling",
-        action="store_true",
-        help="Enable VAE tiling for memory optimization.",
-    )
-
-    # Prompt configuration
+    parser.add_argument("--vae-use-tiling", action="store_true", help="Enable VAE tiling.")
     parser.add_argument(
         "--bot-task",
         type=str,
         default=None,
-        help="Override prompt task (e.g. it2i_think, t2i_recaption). Default: auto from modality.",
+        choices=["none", "think", "recaption", "think_recaption", "vanilla"],
+        help="Override prompt mode. Default: auto from --modality.",
     )
-    parser.add_argument(
-        "--sys-type",
-        type=str,
-        default=None,
-        help="Override system prompt type (e.g. en_unified, en_vanilla).",
-    )
-
-    # Omni init args
-    parser.add_argument("--stage-configs-path", type=str, default=None, help="Custom stage config YAML path.")
+    parser.add_argument("--sys-type", type=str, default=None, help="Override system prompt type.")
+    parser.add_argument("--deploy-config", type=str, default=None, help="Custom deploy YAML path.")
+    parser.add_argument("--stage-configs-path", type=str, default=None, help="Custom legacy stage config YAML path.")
     parser.add_argument("--log-stats", action="store_true", default=False)
     parser.add_argument("--init-timeout", type=int, default=300, help="Initialization timeout in seconds.")
     parser.add_argument("--enforce-eager", action="store_true", help="Disable torch.compile.")
+    parser.add_argument(
+        "--diffusion-kv-cache-dtype",
+        type=str,
+        default=None,
+        help="Diffusion attention KV cache dtype, for example 'fp8'. Separate from vLLM --kv-cache-dtype.",
+    )
+    parser.add_argument(
+        "--diffusion-kv-cache-skip-steps",
+        type=str,
+        default=None,
+        help="Denoising step selector to keep diffusion KV cache in native dtype, for example '0,1,4-6'.",
+    )
+    parser.add_argument(
+        "--diffusion-kv-cache-skip-layers",
+        type=str,
+        default=None,
+        help="Transformer layer selector to keep diffusion KV cache in native dtype, for example '0-2,10'.",
+    )
+    parser.add_argument(
+        "--additional-config",
+        type=str,
+        default=None,
+        help=(
+            "JSON object forwarded to Omni/additional_config, for example "
+            '\'{"torchair_graph_config":{"enabled":true}}\'. Different platforms may support different '
+            "configs. Make sure the configs are valid for the platform you are using. "
+            "Contents must be hashable."
+        ),
+    )
 
     from vllm_omni.engine.arg_utils import nullify_stage_engine_defaults
 
@@ -116,135 +113,182 @@ def parse_args():
     return parser.parse_args()
 
 
+def parse_additional_config(raw_value: str | None) -> dict | None:
+    """Parse a JSON string into an additional_config mapping."""
+    if raw_value is None:
+        return None
+
+    try:
+        additional_config = json.loads(raw_value)
+    except json.JSONDecodeError as exc:
+        raise ValueError(f"Invalid --additional-config JSON: {exc}") from exc
+
+    if additional_config is None:
+        return None
+    if not isinstance(additional_config, dict):
+        raise ValueError(f"--additional-config must decode to a JSON object, got {type(additional_config).__name__}")
+    return additional_config
+
+
 def main():
     args = parse_args()
     os.makedirs(args.output, exist_ok=True)
+    additional_config = parse_additional_config(args.additional_config)
 
-    # Determine task for prompt formatting
-    task = args.bot_task or _MODALITY_TASK_MAP[args.modality]
+    task, default_bot_task = _MODALITY_TASK_MAP[args.modality]
+    if args.bot_task is None:
+        bot_task: str | None = default_bot_task
+    elif args.bot_task == "none":
+        bot_task = None
+    else:
+        bot_task = args.bot_task
 
-    # Determine stage config
-    stage_configs_path = args.stage_configs_path or _MODALITY_DEFAULT_CONFIG[args.modality]
+    if args.deploy_config is not None and args.stage_configs_path is not None:
+        raise ValueError("--deploy-config and --stage-configs-path are mutually exclusive.")
+
+    deploy_config = args.deploy_config
+    stage_configs_path = args.stage_configs_path
+    if deploy_config is None and stage_configs_path is None:
+        deploy_config = _MODALITY_DEFAULT_DEPLOY_CONFIG[args.modality]
 
-    # Build Omni
     omni_kwargs = {
         "model": args.model,
         "vae_use_tiling": args.vae_use_tiling,
-        "stage_configs_path": stage_configs_path,
         "log_stats": args.log_stats,
         "init_timeout": args.init_timeout,
         "enforce_eager": args.enforce_eager,
+        "mode": _MODALITY_MODE[args.modality],
+        "diffusion_kv_cache_dtype": args.diffusion_kv_cache_dtype,
+        "diffusion_kv_cache_skip_steps": args.diffusion_kv_cache_skip_steps,
+        "diffusion_kv_cache_skip_layers": args.diffusion_kv_cache_skip_layers,
     }
-    if args.modality in ("text2img", "img2img"):
-        omni_kwargs["mode"] = "text-to-image"
+
+    if additional_config is not None:
+        omni_kwargs["additional_config"] = additional_config
+    if deploy_config is not None:
+        omni_kwargs["deploy_config"] = deploy_config
+    else:
+        omni_kwargs["stage_configs_path"] = stage_configs_path
 
     omni = Omni(**omni_kwargs)
 
-    # Prepare prompts
     prompts = args.prompts or ["A cute cat"]
-    if not prompts:
-        print("[Info] No prompts provided, using default.")
-        prompts = ["A cute cat"]
-
-    # Load image if needed
-    input_image = None
+    input_images: list = []
     if args.modality in ("img2img", "img2text"):
-        if not args.image_path or not os.path.exists(args.image_path):
+        if not args.image_path:
             raise ValueError(f"--image-path required for {args.modality}, got: {args.image_path}")
         from PIL import Image
 
-        input_image = Image.open(args.image_path).convert("RGB")
+        image_paths = [p.strip() for p in args.image_path.split(",") if p.strip()]
+        if len(image_paths) > MAX_IMAGES_PER_REQUEST:
+            raise ValueError(
+                f"--image-path accepts at most {MAX_IMAGES_PER_REQUEST} images for "
+                f"HunyuanImage-3.0 IT2I, got {len(image_paths)}: {args.image_path}"
+            )
+        for image_path in image_paths:
+            if not os.path.exists(image_path):
+                raise ValueError(f"Image path does not exist: {image_path}")
+            input_images.append(Image.open(image_path).convert("RGB"))
+        if not input_images:
+            raise ValueError(f"--image-path produced no usable paths: {args.image_path!r}")
 
-    # Load tokenizer for segment-wise prompt tokenization (matches HF
-    # apply_chat_template byte-for-byte; see build_prompt_tokens docstring).
     from transformers import AutoTokenizer
 
     tokenizer = AutoTokenizer.from_pretrained(args.model, trust_remote_code=True)
+    mm_image_payload = (input_images[0] if len(input_images) == 1 else input_images) if input_images else None
 
-    # Format prompts
     formatted_prompts: list[OmniPromptType] = []
-    for p in prompts:
-        token_ids = build_prompt_tokens(p, tokenizer, task=task, sys_type=args.sys_type)
-        preset_sys_type, _, _ = _TASK_PRESETS[task]
-        effective_sys_type = args.sys_type or preset_sys_type
+    for prompt in prompts:
+        build_kwargs: dict = {"task": task, "bot_task": bot_task, "sys_type": args.sys_type}
+        if input_images:
+            build_kwargs["num_images"] = len(input_images)
+        result = build_prompt_tokens(prompt, tokenizer, **build_kwargs)
+        token_ids = result.token_ids
+        effective_sys_type = args.sys_type or resolve_sys_type(bot_task)
 
-        # `prompt_token_ids` drives the AR stage (matches HF byte-for-byte).
-        # `prompt` and `use_system_prompt` are forwarded by ar2diffusion to
-        # the DiT stage so the diffusion pipeline can rebuild the same
-        # system prefix when constructing its model inputs.
         prompt_dict: dict = {
             "prompt_token_ids": token_ids,
-            "prompt": p,
+            "prompt": prompt,
             "use_system_prompt": effective_sys_type,
         }
-
         if args.modality == "text2img":
             prompt_dict["modalities"] = ["image"]
         elif args.modality == "img2img":
             prompt_dict["modalities"] = ["image"]
-            prompt_dict["multi_modal_data"] = {"image": input_image}
-            prompt_dict["height"] = input_image.height
-            prompt_dict["width"] = input_image.width
+            prompt_dict["multi_modal_data"] = {"image": mm_image_payload}
+            prompt_dict["height"] = input_images[0].height
+            prompt_dict["width"] = input_images[0].width
         elif args.modality == "img2text":
             prompt_dict["modalities"] = ["text"]
-            prompt_dict["multi_modal_data"] = {"image": input_image}
-        elif args.modality == "text2text":
+            prompt_dict["multi_modal_data"] = {"image": mm_image_payload}
+        else:
             prompt_dict["modalities"] = ["text"]
-
         formatted_prompts.append(prompt_dict)
 
-    # Build sampling params from defaults
     params_list = list(omni.default_sampling_params_list)
 
-    # Override diffusion params if applicable
     from vllm_omni.inputs.data import OmniDiffusionSamplingParams
 
-    for i, sp in enumerate(params_list):
+    ar_stop_token_ids = resolve_stop_token_ids(task=task, bot_task=bot_task, tokenizer=tokenizer)
+    for sp in params_list:
         if isinstance(sp, OmniDiffusionSamplingParams):
             sp.num_inference_steps = args.steps
             sp.guidance_scale = args.guidance_scale
+            sp.guidance_scale_provided = True
             if args.seed is not None:
                 sp.seed = args.seed
-            if args.modality in ("text2img",):
+            if args.modality == "text2img":
                 sp.height = args.height
                 sp.width = args.width
+        elif hasattr(sp, "stop_token_ids"):
+            sp.stop_token_ids = ar_stop_token_ids
 
-    # Print configuration
     print(f"\n{'=' * 60}")
     print("HunyuanImage-3.0 Generation Configuration:")
     print(f"  Model: {args.model}")
     print(f"  Modality: {args.modality}")
-    print(f"  Stage config: {stage_configs_path}")
+    print(f"  Prompt task: {task}")
+    print(f"  Bot task: {bot_task}")
+    if deploy_config is not None:
+        print(f"  Deploy config: {deploy_config}")
+    else:
+        print(f"  Stage config: {stage_configs_path}")
     print(f"  Num stages: {omni.num_stages}")
     if args.modality in ("text2img", "img2img"):
         print(f"  Inference steps: {args.steps}")
         print(f"  Guidance scale: {args.guidance_scale}")
         print(f"  Seed: {args.seed}")
+        print(f"  diffusion_kv_cache_dtype: {args.diffusion_kv_cache_dtype}")
+        print(f"  diffusion_kv_cache_skip_steps: {args.diffusion_kv_cache_skip_steps}")
+        print(f"  diffusion_kv_cache_skip_layers: {args.diffusion_kv_cache_skip_layers}")
     if args.modality == "text2img":
         print(f"  Output size: {args.width}x{args.height}")
     if args.image_path:
         print(f"  Input image: {args.image_path}")
+    if additional_config is not None:
+        print(f"  Additional config: {additional_config}")
     print(f"  Prompts: {prompts}")
     print(f"{'=' * 60}\n")
 
-    # Generate
     omni_outputs = list(omni.generate(prompts=formatted_prompts, sampling_params_list=params_list))
-
-    # Process outputs
     img_idx = 0
     for req_output in omni_outputs:
-        # Text output (AR stage or text-only)
         ro = getattr(req_output, "request_output", None)
+        txt = ""
         if ro and getattr(ro, "outputs", None):
             txt = "".join(getattr(o, "text", "") or "" for o in ro.outputs)
-            if txt:
-                print(f"[Output] Text:\n{txt}")
+        if not txt:
+            ar_text = getattr(req_output, "custom_output", {}).get("ar_generated_text")
+            if isinstance(ar_text, list):
+                txt = "\n".join(text for text in ar_text if text)
+            else:
+                txt = ar_text or ""
+        if txt:
+            print(f"[Output] Text:\n{txt}")
 
-        # Image output (DiT stage)
         images = getattr(req_output, "images", None)
         if not images and ro and hasattr(ro, "images"):
             images = ro.images
-
         if images:
             for j, img in enumerate(images):
                 save_path = os.path.join(args.output, f"output_{img_idx}_{j}.png")

examples/offline_inference/image_to_video/image_to_video.py

@@ -102,6 +102,24 @@ def parse_args() -> argparse.Namespace:
         choices=["unipc", "euler"],
         help="Sampling solver for Wan2.2 pipelines. Use 'euler' for Lightning/Distill setups.",
     )
+    parser.add_argument(
+        "--diffusion-kv-cache-dtype",
+        type=str,
+        default=None,
+        help="Diffusion attention KV cache dtype (e.g. float8_e4m3fn). Separate from vLLM --kv-cache-dtype.",
+    )
+    parser.add_argument(
+        "--diffusion-kv-cache-skip-steps",
+        type=str,
+        default=None,
+        help="Diffusion KV-cache quantization skip-step selector, e.g. '0-9,20,25-30'.",
+    )
+    parser.add_argument(
+        "--diffusion-kv-cache-skip-layers",
+        type=str,
+        default=None,
+        help="Diffusion KV-cache quantization skip-layer selector, e.g. '0,1,4-8'.",
+    )
     parser.add_argument("--output", type=str, default="i2v_output.mp4", help="Path to save the video (mp4).")
     parser.add_argument("--fps", type=int, default=None, help="Frames per second for the output video.")
     parser.add_argument(
@@ -124,6 +142,42 @@ def parse_args() -> argparse.Namespace:
         action="store_true",
         help="Enable layerwise (blockwise) offloading on DiT modules.",
     )
+    parser.add_argument(
+        "--enforce-eager",
+        action="store_true",
+        help="Disable torch.compile and force eager execution.",
+    )
+    parser.add_argument(
+        "--audio-sample-rate",
+        type=int,
+        default=24000,
+        help="Sample rate for audio output when saved (default: 24000).",
+    )
+    parser.add_argument(
+        "--cache-backend",
+        type=str,
+        default=None,
+        choices=["cache_dit", "tea_cache"],
+        help=(
+            "Cache backend to use for acceleration. "
+            "Options: 'cache_dit' (DBCache + SCM + TaylorSeer), 'tea_cache' (Timestep Embedding Aware Cache). "
+            "Default: None (no cache acceleration)."
+        ),
+    )
+    parser.add_argument(
+        "--enable-diffusion-pipeline-profiler",
+        action="store_true",
+        help="Enable diffusion pipeline profiler to display stage durations.",
+    )
+    parser.add_argument(
+        "--quantization",
+        type=str,
+        default=None,
+        choices=["fp8", "mxfp8", "mxfp4", "mxfp4_dualscale", "int8", "gguf"],
+        help="Quantization method for the transformer. mxfp8: W8A8 MXFP8 (NPU). mxfp4: W4A4 MXFP4 (NPU). mxfp4_dualscale: W4A4 MXFP4 dual-scale + BF16 fallback mixed (NPU). fp8: online FP8 (GPU).",
+    )
+
+    # Distributed and parallel execution
     parser.add_argument(
         "--ulysses-degree",
         type=int,
@@ -155,28 +209,6 @@ def parse_args() -> argparse.Namespace:
         default=1,
         help="Number of GPUs used for VAE patch/tile parallelism (decode).",
     )
-    parser.add_argument(
-        "--enforce-eager",
-        action="store_true",
-        help="Disable torch.compile and force eager execution.",
-    )
-    parser.add_argument(
-        "--audio-sample-rate",
-        type=int,
-        default=24000,
-        help="Sample rate for audio output when saved (default: 24000).",
-    )
-    parser.add_argument(
-        "--cache-backend",
-        type=str,
-        default=None,
-        choices=["cache_dit", "tea_cache"],
-        help=(
-            "Cache backend to use for acceleration. "
-            "Options: 'cache_dit' (DBCache + SCM + TaylorSeer), 'tea_cache' (Timestep Embedding Aware Cache). "
-            "Default: None (no cache acceleration)."
-        ),
-    )
     parser.add_argument(
         "--use-hsdp",
         action="store_true",
@@ -201,9 +233,10 @@ def parse_args() -> argparse.Namespace:
         ),
     )
     parser.add_argument(
-        "--enable-diffusion-pipeline-profiler",
-        action="store_true",
-        help="Enable diffusion pipeline profiler to display stage durations.",
+        "--pipeline-parallel-size",
+        type=int,
+        default=1,
+        help="Number of pipeline parallel stages.",
     )
     parser.add_argument(
         "--profiler-config",
@@ -301,14 +334,18 @@ def main():
         use_hsdp=args.use_hsdp,
         hsdp_shard_size=args.hsdp_shard_size,
         hsdp_replicate_size=args.hsdp_replicate_size,
+        pipeline_parallel_size=args.pipeline_parallel_size,
     )
-    omni = Omni(
+    omni_kwargs = dict(
         model=args.model,
         enable_layerwise_offload=args.enable_layerwise_offload,
         vae_use_slicing=args.vae_use_slicing,
         vae_use_tiling=args.vae_use_tiling,
         boundary_ratio=args.boundary_ratio,
         flow_shift=args.flow_shift,
+        diffusion_kv_cache_dtype=args.diffusion_kv_cache_dtype,
+        diffusion_kv_cache_skip_steps=args.diffusion_kv_cache_skip_steps,
+        diffusion_kv_cache_skip_layers=args.diffusion_kv_cache_skip_layers,
         enable_cpu_offload=args.enable_cpu_offload,
         parallel_config=parallel_config,
         enforce_eager=args.enforce_eager,
@@ -318,6 +355,9 @@ def main():
         enable_diffusion_pipeline_profiler=args.enable_diffusion_pipeline_profiler,
         profiler_config=args.profiler_config,
     )
+    if args.quantization is not None:
+        omni_kwargs["quantization"] = args.quantization
+    omni = Omni(**omni_kwargs)
 
     if profiler_enabled:
         print("[Profiler] Starting profiling...")
@@ -330,9 +370,13 @@ def main():
     print(f"  Inference steps: {args.num_inference_steps}")
     print(f"  Frames: {args.num_frames}")
     print(f"  Solver: {args.sample_solver}")
+    print(f"  diffusion_kv_cache_dtype(config): {args.diffusion_kv_cache_dtype}")
+    print(f"  diffusion_kv_cache_skip_steps(config): {args.diffusion_kv_cache_skip_steps}")
+    print(f"  diffusion_kv_cache_skip_layers(config): {args.diffusion_kv_cache_skip_layers}")
     print(
         f"  Parallel configuration: cfg_parallel_size={args.cfg_parallel_size},"
-        f" tensor_parallel_size={args.tensor_parallel_size}, vae_patch_parallel_size={args.vae_patch_parallel_size}"
+        f" tensor_parallel_size={args.tensor_parallel_size}, vae_patch_parallel_size={args.vae_patch_parallel_size},"
+        f" pipeline_parallel_size={args.pipeline_parallel_size}"
     )
     print(f"  Video size: {args.width}x{args.height}")
     print(f"{'=' * 60}\n")

examples/offline_inference/internvla_a1/end2end.py

@@ -172,7 +172,7 @@ def run_pipeline_forward(
 
 def _synchronize(device: str) -> None:
     if device.startswith("cuda") and torch.cuda.is_available():
-        torch.cuda.synchronize()
+        torch.accelerator.synchronize()
 
 
 def _latency_summary(values_ms: list[float]) -> dict[str, float]:

examples/offline_inference/sensenova_u1/README.md

@@ -0,0 +1,208 @@
+# SenseNova-U1-8B-MoT
+
+## Architecture
+
+SenseNova-U1 is a unified Qwen3-based LLM with Mixture-of-Tokenizers (MoT) attention. Unlike two-stage pipelines (e.g., BAGEL), it handles text encoding, optional reasoning ("think mode"), and flow-matching-based image denoising entirely within a single diffusion stage.
+
+| Feature | Description |
+| :------ | :---------- |
+| **Model type** | Unified LLM (single-stage diffusion pipeline) |
+| **Base LLM** | Qwen3 with MoT attention and 3D RoPE |
+| **Image generation** | Flow-matching Euler sampler, no separate VAE |
+| **Think mode** | Optional chain-of-thought reasoning before image generation |
+| **Parallelism** | Tensor Parallelism (TP) with fused QKV and fused gate/up projections |
+| **Modalities** | text2img, img2img, img2text (understanding), text2text |
+
+## Quick Start
+
+```bash
+cd examples/offline_inference/sensenova_u1
+
+# Text-to-image
+python end2end.py --prompt "A cute cat" --think
+
+# Image-to-image editing
+python end2end.py --prompt "Turn this into an oil painting" \
+                  --image input.png --think
+
+# Image understanding (img2text)
+python end2end.py --modality img2text \
+                  --prompt "Describe this image in detail" \
+                  --image photo.jpg
+
+# Text-to-text (pure chat)
+python end2end.py --modality text2text \
+                  --prompt "What is the capital of France?"
+
+# Custom resolution (image generation)
+python end2end.py --prompt "A futuristic cityscape at sunset" \
+                  --width 2048 --height 1024 --think
+```
+
+> **Note**: Default configuration works on a single **NVIDIA A100 (80GB)** or **H100** GPU.
+
+## Text-to-Image (t2i)
+
+Standard text-to-image with optional think mode:
+
+```bash
+python end2end.py \
+    --prompt "Close portrait of an elderly woman by a farmhouse window, textured skin, gentle smile, warm natural light" \
+    --width 1536 --height 2720 \
+    --think --print-think
+```
+
+## Image-to-Image Editing (img2img)
+
+Pass one or more `--image` paths to trigger img2img mode. The model uses the
+input image(s) as visual context for editing:
+
+```bash
+# Single input image
+python end2end.py \
+    --prompt "Add a sunset sky in the background" \
+    --image photo.jpg \
+    --width 2048 --height 2048 \
+    --think
+
+# Multiple reference images
+python end2end.py \
+    --prompt "Combine the style of Image-1 with the content of Image-2" \
+    --image style_ref.png content_ref.png \
+    --width 2048 --height 2048 \
+    --think
+```
+
+### Dual CFG for img2img
+
+img2img supports dual classifier-free guidance (text CFG + image CFG):
+
+```bash
+python end2end.py \
+    --prompt "Make the person smile" \
+    --image portrait.jpg \
+    --cfg-scale 4.0 \
+    --img-cfg-scale 2.0 \
+    --think
+```
+
+| `img_cfg_scale` | Behavior |
+| :-------------- | :------- |
+| `1.0` (default) | Text-only CFG: guidance = image-condition → full-condition |
+| `== cfg_scale` | Standard CFG: guidance = unconditional → full-condition |
+| Other value | Dual CFG: separate text and image guidance strengths |
+
+## Full Parameter Reference
+
+### General Parameters
+
+| Parameter | Default | Description |
+| :-------- | :------ | :---------- |
+| `--modality` | `auto` | Task modality: `auto`, `text2img`, `img2img`, `img2text`, `text2text` |
+| `--prompt` | "A cute cat..." | Text prompt / editing instruction / question |
+| `--image` | None | Input image path(s) for img2img or img2text |
+
+### Image Generation Parameters (text2img / img2img)
+
+| Parameter | Default | Description |
+| :-------- | :------ | :---------- |
+| `--height` | 2048 | Height of generated image (pixels) |
+| `--width` | 2048 | Width of generated image (pixels) |
+| `--seed` | 42 | Random seed for reproducibility |
+| `--num-steps` | 50 | Number of denoising steps |
+| `--cfg-scale` | 4.0 | Text classifier-free guidance scale |
+| `--img-cfg-scale` | 1.0 | Image CFG scale (img2img only, 1.0 = disabled) |
+| `--cfg-norm` | "none" | CFG normalization: none, global, channel, cfg_zero_star (t2i only) |
+| `--timestep-shift` | 3.0 | Timestep shift for flow-matching schedule |
+| `--t-eps` | 0.02 | Epsilon for timestep schedule |
+| `--think` | False | Enable think mode |
+| `--print-think` | False | Print think text to stdout |
+
+### Text Generation Parameters (text2text / img2text)
+
+| Parameter | Default | Description |
+| :-------- | :------ | :---------- |
+| `--max-tokens` | 512 | Maximum number of tokens to generate |
+| `--do-sample` | False | Use sampling instead of greedy decoding |
+| `--temperature` | 0.7 | Sampling temperature (higher = more diverse) |
+
+### Infrastructure Parameters
+
+| Parameter | Default | Description |
+| :-------- | :------ | :---------- |
+| `--model` | `SenseNova/SenseNova-U1-8B-MoT` | HuggingFace model ID or local path |
+| `--output` | `.` | Output directory for saved images |
+| `--tensor-parallel-size` | 1 | Number of GPUs for tensor parallelism |
+| `--enforce-eager` | False | Disable torch.compile |
+| `--enable-cpu-offload` | False | Enable module-wise (sequential) CPU offload to reduce peak VRAM |
+
+## Reducing GPU Memory Usage
+
+For hardware with limited VRAM, enable **module-wise CPU offload** with
+`--enable-cpu-offload`. The pipeline implements `SupportsModuleOffload`, so the
+vision encoder (`vision_model`) and the Qwen3 LLM (`language_model`) are
+swapped between CPU and GPU on demand:
+
+- During text/vision encoding, the LLM is on CPU.
+- During the diffusion loop, the vision encoder is on CPU.
+- Lightweight FM modules stay resident on GPU.
+
+This lowers peak VRAM at the cost of extra CPU<->GPU transfers (use pinned
+memory) — useful for running SenseNova-U1 on consumer-grade GPUs.
+
+```bash
+# Text-to-image with CPU offload
+python end2end.py \
+    --prompt "A cute cat sitting on a windowsill" \
+    --width 2048 --height 2048 \
+    --enable-cpu-offload --think
+
+# Image-to-image editing with CPU offload
+python end2end.py \
+    --prompt "Turn this into an oil painting" \
+    --image input.png \
+    --width 2048 --height 2048 \
+    --enable-cpu-offload --think
+
+# Image understanding (img2text) with CPU offload
+python end2end.py \
+    --modality img2text \
+    --prompt "Describe this image in detail" \
+    --image photo.jpg \
+    --enable-cpu-offload
+```
+
+> **Notes**
+> - CPU offload is **single-GPU only** (incompatible with `--tensor-parallel-size > 1`).
+> - First-step latency is higher because of the cold-start CPU<->GPU transfers.
+> - For more details and other offloading strategies, see
+>   [CPU Offloading for Diffusion Models](../../../docs/user_guide/diffusion/cpu_offload_diffusion.md).
+
+## Reproducing the E2E Test
+
+The following command reproduces the pixel-validated CI test case:
+
+```bash
+python end2end.py \
+    --prompt "Close portrait of an elderly woman by a farmhouse window, textured skin, gentle smile, warm natural light, emotional documentary look. The portrait should feel polished and natural, with sharp eyes, realistic skin texture, accurate facial anatomy, and premium lighting that keeps the face as the main focus." \
+    --width 1536 --height 2720 \
+    --seed 42 --num-steps 50 \
+    --cfg-scale 4.0 --timestep-shift 3.0 --cfg-norm none \
+    --think --print-think \
+    --output outputs
+```
+
+The corresponding pytest:
+
+```bash
+pytest -s -v tests/e2e/offline_inference/test_sensenova_u1_text2img.py \
+    -m "advanced_model" --run-level "advanced_model"
+```
+
+The img2img counterpart lives at
+`tests/e2e/offline_inference/test_sensenova_u1_img2img.py`.
+
+## Online Serving
+
+For OpenAI-compatible API serving, see
+[`examples/online_serving/sensenova_u1/`](../../examples/online_serving/sensenova_u1/).