[Core][Frontend] Unified Full-duplex Framework (#7413)

Signed-off-by: chickeyton <ngton2014@gmail.com>
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

vllm_omni/entrypoints/cli/benchmark/cli_args.py

@@ -206,8 +206,10 @@ def add_seed_tts_cli_args(parser: argparse.ArgumentParser) -> None:
         "--seed-tts-turns-per-session",
         type=int,
         default=1,
-        help="Group this many Seed-TTS target texts into one Realtime session. "
-        "The first row's reference audio and transcript are reused for every turn.",
+        help="Group this many Seed-TTS target texts into one benchmark request. "
+        "The first row's reference audio and transcript are reused for every turn. "
+        "A model-native duplex session takes its target text once, in the session "
+        "context, so each turn runs in its own session.",
     )
     group.add_argument(
         "--seed-tts-root",