fix(elevenlabs): restore chunk length schedule in WS init

[u9g]

Summary

• restore generation_config.chunk_length_schedule in ElevenLabs multi-context websocket init packets
• keep existing default auto_mode=True for normal usage, but default to auto_mode=False when chunk_length_schedule is explicitly provided so the schedule is not implicitly disabled
• refactor init packet construction into a helper for deterministic unit coverage

Why

chunk_length_schedule has been accepted/stored by the plugin but not forwarded in current multi-context websocket flow, making it a no-op in practice.

Changes

• livekit/plugins/elevenlabs/tts.py
  • add _build_context_init_packet(...) to include:
    • text
    • voice_settings
    • context_id
    • generation_config.chunk_length_schedule when provided
    • pronunciation_dictionary_locators when provided
  • use this helper in _Connection._send_loop() init path
  • set constructor defaulting to auto_mode = not is_given(chunk_length_schedule) when auto_mode is not explicitly provided

Tests

Added tests/test_plugin_elevenlabs_tts.py covering:

• auto_mode defaults with and without explicit chunk schedule
• explicit auto_mode override precedence
• init packet includes generation_config when schedule is set
• init packet omits generation_config when schedule is unset
• pronunciation dictionary locators are preserved in init packet

Run locally:

• uv run pytest tests/test_plugin_elevenlabs_tts.py -q
• uv run ruff check livekit-plugins/livekit-plugins-elevenlabs/livekit/plugins/elevenlabs/tts.py tests/test_plugin_elevenlabs_tts.py

[changeset-bot]

🦋 Changeset detected

Latest commit: f654669

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 30 packages

Name	Type
@livekit/agents-plugin-elevenlabs	Patch
@livekit/agents	Patch
@livekit/agents-plugin-anam	Patch
@livekit/agents-plugin-assemblyai	Patch
@livekit/agents-plugin-baseten	Patch
@livekit/agents-plugin-bey	Patch
@livekit/agents-plugin-cartesia	Patch
@livekit/agents-plugin-cerebras	Patch
@livekit/agents-plugin-deepgram	Patch
@livekit/agents-plugin-fishaudio	Patch
@livekit/agents-plugin-google	Patch
@livekit/agents-plugin-hedra	Patch
@livekit/agents-plugin-inworld	Patch
@livekit/agents-plugin-lemonslice	Patch
@livekit/agents-plugin-liveavatar	Patch
@livekit/agents-plugin-livekit	Patch
@livekit/agents-plugin-minimax	Patch
@livekit/agents-plugin-mistral	Patch
@livekit/agents-plugin-mistralai	Patch
@livekit/agents-plugin-neuphonic	Patch
@livekit/agents-plugin-openai	Patch
@livekit/agents-plugin-phonic	Patch
@livekit/agents-plugin-resemble	Patch
@livekit/agents-plugin-rime	Patch
@livekit/agents-plugin-runway	Patch
@livekit/agents-plugin-sarvam	Patch
@livekit/agents-plugin-silero	Patch
@livekit/agents-plugin-trugen	Patch
@livekit/agents-plugin-xai	Patch
@livekit/agents-plugins-test	Patch

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 3 additional findings.