diff --git a/.github/workflows/ci-all-files.yml b/.github/workflows/ci-all-files.yml
deleted file mode 100644
index a5e4179a0..000000000
--- a/.github/workflows/ci-all-files.yml
+++ /dev/null
@@ -1,60 +0,0 @@
-name: CI All Files
-
-on:
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-jobs:
-  test-changed:
-    runs-on: ubuntu-latest
-    timeout-minutes: 30
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.12", "3.13"]
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0 # Need full history to detect changes
-
-      - name: Free disk space
-        run: |
-          # Remove large, preinstalled toolchains we don't need on the runner
-          sudo rm -rf /usr/share/dotnet
-          sudo rm -rf /opt/ghc
-          sudo rm -rf /usr/local/lib/android
-          sudo rm -rf /opt/hostedtoolcache/CodeQL
-          # Prune docker to reclaim space (safe on GH runners)
-          docker system prune -af || true
-          df -h
-
-      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-
-      - name: Prepare environment with uv
-        run: |
-          python -m pip install --upgrade pip uv
-          uv venv --python "${{ matrix.python-version }}" --seed
-          echo "VIRTUAL_ENV=${PWD}/.venv" >> "$GITHUB_ENV"
-          echo "PATH=${PWD}/.venv/bin:$PATH" >> "$GITHUB_ENV"
-          source .venv/bin/activate
-          uv pip install -e ".[dev]"
-
-      - name: Run tests
-        run: |
-          if [ ! -d tests ]; then
-            echo "tests/ directory not found. Skipping pytest run."
-
-
-            exit 0
-          fi
-          TEST_FILES=$(find tests -type f \( -name "test_*.py" -o -name "*_test.py" \))
-          if [ -z "$TEST_FILES" ]; then
-            echo "No pytest-compatible test files detected under tests/. Skipping pytest run."
-            exit 0
-          fi
-          pytest tests/ -v -m "not slow"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
deleted file mode 100644
index 413c19092..000000000
--- a/.github/workflows/ci.yml
+++ /dev/null
@@ -1,124 +0,0 @@
-name: CI
-
-on:
-  pull_request:
-    branches: [main]
-  workflow_dispatch:
-    inputs:
-      test_changed_only:
-        description: 'Only test changed files (true) or all files (false)'
-        required: false
-        default: 'true'
-        type: choice
-        options:
-          - 'true'
-          - 'false'
-      enable_changed_files_detection:
-        description: 'Enable changed files detection feature'
-        required: false
-        default: 'true'
-        type: choice
-        options:
-          - 'true'
-          - 'false'
-  workflow_call:
-    inputs:
-      test_changed_only:
-        description: 'Only test changed files (true) or all files (false)'
-        required: false
-        type: string
-        default: 'true'
-      enable_changed_files_detection:
-        description: 'Enable changed files detection feature'
-        required: false
-        type: string
-        default: 'true'
-
-permissions:
-  contents: read
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    timeout-minutes: 30
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.12", "3.13"]
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Free disk space
-        run: |
-          # Remove large, preinstalled toolchains we don't need on the runner
-          sudo rm -rf /usr/share/dotnet
-          sudo rm -rf /opt/ghc
-          sudo rm -rf /usr/local/lib/android
-          sudo rm -rf /opt/hostedtoolcache/CodeQL
-          # Prune docker to reclaim space (safe on GH runners)
-          docker system prune -af || true
-          df -h
-
-      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-
-      - name: Prepare environment with uv
-        run: |
-          python -m pip install --upgrade pip uv
-          uv venv --python "${{ matrix.python-version }}" --seed
-          echo "VIRTUAL_ENV=${PWD}/.venv" >> "$GITHUB_ENV"
-          echo "PATH=${PWD}/.venv/bin:${PATH}" >> "$GITHUB_ENV"
-          # Activate env to ensure subsequent commands succeed in this step
-          source .venv/bin/activate
-          uv pip install -e ".[dev]"
-
-      - name: Determine test scope
-        id: test-scope
-        env:
-          ENABLE_CHANGED_FILES_DETECTION: ${{ inputs.enable_changed_files_detection || 'true' }}
-          TEST_CHANGED_ONLY: ${{ inputs.test_changed_only || 'true' }}
-        run: |
-          # Determine if we should test only changed files
-          # If detection is disabled, always test all files
-          if [ "$ENABLE_CHANGED_FILES_DETECTION" != "true" ]; then
-            TEST_CHANGED_ONLY="false"
-          fi
-
-          echo "test_changed_only=$TEST_CHANGED_ONLY" >> "$GITHUB_OUTPUT"
-          echo "enable_detection=$ENABLE_CHANGED_FILES_DETECTION" >> "$GITHUB_OUTPUT"
-          echo "Test scope: $TEST_CHANGED_ONLY"
-          echo "Changed files detection: $ENABLE_CHANGED_FILES_DETECTION"
-
-      - name: Get changed test files
-        id: changed-tests
-        if: steps.test-scope.outputs.test_changed_only == 'true' && steps.test-scope.outputs.enable_detection == 'true'
-        env:
-          GITHUB_BASE_REF: ${{ github.event.pull_request.base.sha || '' }}
-          GITHUB_SHA: ${{ github.sha }}
-        run: |
-          chmod +x .github/scripts/detect_changed_tests.sh
-          .github/scripts/detect_changed_tests.sh \
-            "${{ github.event.pull_request.base.sha || github.event.before || '' }}" \
-            "${{ github.sha }}" \
-            "${{ github.event_name }}"
-
-      - name: Run tests (changed files only)
-        if: steps.test-scope.outputs.test_changed_only == 'true' && steps.changed-tests.outputs.has_tests == 'true'
-        run: |
-          pytest "${{ steps.changed-tests.outputs.test_files }}" -v -m "not slow"
-
-      - name: Run tests (all files)
-        if: steps.test-scope.outputs.test_changed_only == 'false' || steps.changed-tests.outputs.has_tests == 'false'
-        run: |
-          if [ ! -d tests ]; then
-            echo "tests/ directory not found. Skipping pytest run."
-            exit 0
-          fi
-          TEST_FILES=$(find tests -type f \( -name "test_*.py" -o -name "*_test.py" \))
-          if [ -z "$TEST_FILES" ]; then
-            echo "No pytest-compatible test files detected under tests/. Skipping pytest run."
-            exit 0
-          fi
-          pytest tests/ -v -m "not slow"
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
index 23292bdbd..d887378cd 100644
--- a/.github/workflows/pre-commit.yml
+++ b/.github/workflows/pre-commit.yml
@@ -3,6 +3,8 @@ name: pre-commit
 on:
   pull_request:
     branches: [main]
+  push:
+    branches: [main]
   workflow_dispatch: # for manual trigger
 
 concurrency:
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 861d131bb..cae61aef1 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,3 +1,6 @@
+default_install_hook_types:
+  - pre-commit
+  - commit-msg
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.6.0
@@ -30,3 +33,28 @@ repos:
     hooks:
       - id: actionlint
         files: ^\.github/workflows/.*\.ya?ml$
+
+
+  - repo: local
+    hooks:
+    - id: signoff-commit
+      name: Sign-off Commit
+      entry: bash
+      args:
+        - -c
+        - |
+          if ! grep -q "^Signed-off-by: $(git config user.name) <$(git config user.email)>" "$(git rev-parse --git-path COMMIT_EDITMSG)"; then
+            printf "\nSigned-off-by: $(git config user.name) <$(git config user.email)>\n" >> "$(git rev-parse --git-path COMMIT_EDITMSG)"
+          fi
+      language: system
+      verbose: true
+      stages: [commit-msg]
+
+    # Keep `suggestion` last
+    - id: suggestion
+      name: Suggestion
+      entry: bash -c 'echo "To bypass all the pre-commit hooks, add --no-verify to git commit. To skip a specific hook, prefix the commit command with SKIP=<hook-id>."'
+      language: system
+      verbose: true
+      pass_filenames: false
+    # Insert new entries above the `suggestion` entry