v0.0.103

### Added

- Added `"timestampTransportStrategy": "ASYNC"` to `InworldAITTSService`. This allows timestamps info to trail audio chunks arrival, resulting in much better first audio chunk latency
  (PR [#3625](https://github.com/pipecat-ai/pipecat/pull/3625))

- Added model-specific `InputParams` to `RimeTTSService`: arcana params (`repetition_penalty`, `temperature`, `top_p`) and mistv2 params (`no_text_normalization`, `save_oovs`, `segment`). Model, voice, and param changes now trigger WebSocket reconnection.
  (PR [#3642](https://github.com/pipecat-ai/pipecat/pull/3642))

- Added `write_transport_frame()` hook to `BaseOutputTransport` allowing transport subclasses to handle custom frame types that flow through the audio queue.
  (PR [#3719](https://github.com/pipecat-ai/pipecat/pull/3719))

- Added `DailySIPTransferFrame` and `DailySIPReferFrame` to the Daily transport.  These frames queue SIP transfer and SIP REFER operations with audio, so the operation executes only after the bot finishes its current utterance.
  (PR [#3719](https://github.com/pipecat-ai/pipecat/pull/3719))

- Added keepalive support to `SarvamSTTService` to prevent idle connection timeouts (e.g. when used behind a `ServiceSwitcher`).
  (PR [#3730](https://github.com/pipecat-ai/pipecat/pull/3730))

- Added `UserIdleTimeoutUpdateFrame` to enable or disable user idle detection at runtime by updating the timeout dynamically.
  (PR [#3748](https://github.com/pipecat-ai/pipecat/pull/3748))

- Added `broadcast_sibling_id` field to the base `Frame` class. This field is automatically set by `broadcast_frame()` and `broadcast_frame_instance()` to the ID of the paired frame pushed in the opposite direction, allowing receivers to identify broadcast pairs.
  (PR [#3774](https://github.com/pipecat-ai/pipecat/pull/3774))

- Added `ignored_sources` parameter to `RTVIObserverParams` and `add_ignored_source()`/`remove_ignored_source()` methods to `RTVIObserver` to suppress RTVI messages from specific pipeline processors (e.g. a silent evaluation LLM).
  (PR [#3779](https://github.com/pipecat-ai/pipecat/pull/3779))

- Added `DeepgramSageMakerTTSService` for running Deepgram TTS models deployed on AWS SageMaker endpoints via HTTP/2 bidirectional streaming. Supports the Deepgram TTS protocol (Speak, Flush, Clear, Close), interruption handling, and per-turn TTFB metrics.
  (PR [#3785](https://github.com/pipecat-ai/pipecat/pull/3785))

### Changed

- ⚠️ `RimeTTSService` now defaults to `model="arcana"` and the `wss://users-ws.rime.ai/ws3` endpoint. `InputParams` defaults changed from mistv2-specific values to `None` — only explicitly-set params are sent as query params.
  (PR [#3642](https://github.com/pipecat-ai/pipecat/pull/3642))

- `AICFilter` now shares read-only AIC models via a singleton `AICModelManager`
  in `aic_filter.py`.
    - Multiple filters using the same model path or `(model_id, model_download_dir)` share one loaded model, with reference counting and concurrent load deduplication.
    - Model file I/O runs off the event loop so the filter does not block.
  (PR [#3684](https://github.com/pipecat-ai/pipecat/pull/3684))

- Added `X-User-Agent` and `X-Request-Id` headers to `InworldTTSService` for better traceability.
  (PR [#3706](https://github.com/pipecat-ai/pipecat/pull/3706))

- `DailyUpdateRemoteParticipantsFrame` is no longer deprecated and is now queued with audio like other transport frames.
  (PR [#3719](https://github.com/pipecat-ai/pipecat/pull/3719))

- Bumped Pillow dependency upper bound from `<12` to `<13` to allow Pillow 12.x.
  (PR [#3728](https://github.com/pipecat-ai/pipecat/pull/3728))

- Moved STT keepalive mechanism from `WebsocketSTTService` to the `STTService` base class, allowing any STT service (not just websocket-based ones) to use idle-connection keepalive via the `keepalive_timeout` and `keepalive_interval` parameters.
  (PR [#3730](https://github.com/pipecat-ai/pipecat/pull/3730))

- Improved audio context management in `AudioContextTTSService` by moving context ID tracking to the base class and adding `reuse_context_id_within_turn` parameter to control concurrent TTS request handling.
    - Added helper methods: `has_active_audio_context()`, `get_active_audio_context_id()`, `remove_active_audio_context()`, `reset_active_audio_context()`
    - Simplified Cartesia, ElevenLabs, Inworld, Rime, AsyncAI, and Gradium TTS implementations by removing duplicate context management code
 (PR [#3732](https://github.com/pipecat-ai/pipecat/pull/3732))

- `UserIdleController` is now always created with a default timeout of 0 (disabled). The `user_idle_timeout` parameter changed from `Optional[float] = None` to `float = 0` in `UserTurnProcessor`, `LLMUserAggregatorParams`, and `UserIdleController`.
  (PR [#3748](https://github.com/pipecat-ai/pipecat/pull/3748))

- Change the version specifier from `>=0.2.8` to `~=0.2.8` for the `speechmatics-voice` package to ensure compatibility with future patch versions.
  (PR [#3761](https://github.com/pipecat-ai/pipecat/pull/3761))

- Updated `InworldTTSService` and `InworldHttpTTSService` to use `ASYNC` timestamp transport strategy by default
  (PR [#3765](https://github.com/pipecat-ai/pipecat/pull/3765))

- Added `start_time` and `end_time` parameters to `start_ttfb_metrics()`, `stop_ttfb_metrics()`, `start_processing_metrics()`, and `stop_processing_metrics()` in `FrameProcessor` and `FrameProcessorMetrics`, allowing custom timestamps for metrics measurement. `STTService` now uses these instead of custom TTFB tracking.
  (PR [#3776](https://github.com/pipecat-ai/pipecat/pull/3776))

- Updated default Anthropic model from `claude-sonnet-4-5-20250929` to `claude-sonnet-4-6`.
  (PR [#3792](https://github.com/pipecat-ai/pipecat/pull/3792))

### Deprecated

- Deprecated unused `Traceable`, `@traceable`, `@traced`, and `AttachmentStrategy` in `pipecat.utils.tracing.class_decorators`. This module will be removed in a future release.
  (PR [#3733](https://github.com/pipecat-ai/pipecat/pull/3733))

### Fixed

- Fixed race condition where `RTVIObserver` could send messages before `DailyTransport` join completed. Outbound messages are now queued & delivered after the transport is ready.
  (PR [#3615](https://github.com/pipecat-ai/pipecat/pull/3615))

- Fixed async generator cleanup in OpenAI LLM streaming to prevent `AttributeError` with uvloop on Python 3.12+ (MagicStack/uvloop#699).
  (PR [#3698](https://github.com/pipecat-ai/pipecat/pull/3698))

- Fixed `SmallWebRTCTransport` input audio resampling to properly handle all sample rates, including 8kHz audio.
  (PR [#3713](https://github.com/pipecat-ai/pipecat/pull/3713))

- Fixed a race condition in `RTVIObserver` where bot output messages could be sent before the bot-started-speaking event.
  (PR [#3718](https://github.com/pipecat-ai/pipecat/pull/3718))

- Fixed Grok Realtime `session.updated` event parsing failure caused by the API returning prefixed voice names (e.g. `"human_Ara"` instead of `"Ara"`).
  (PR [#3720](https://github.com/pipecat-ai/pipecat/pull/3720))

- Fixed context ID reuse issue in `ElevenLabsTTSService`, `InworldTTSService`, `RimeTTSService`, `CartesiaTTSService`, `AsyncAITTSService`, and `PlayHTTTSService`. Services now properly reuse the same context ID across multiple `run_tts()` invocations within a single LLM turn, preventing context tracking issues and incorrect lifecycle signaling.
  (PR [#3729](https://github.com/pipecat-ai/pipecat/pull/3729))

- Fixed word timestamp interleaving issue in `ElevenLabsTTSService` when processing multiple sentences within a single LLM turn.
  (PR [#3729](https://github.com/pipecat-ai/pipecat/pull/3729))

- Fixed tracing service decorators executing the wrapped function twice when the function itself raised an exception (e.g., LLM rate limit, TTS timeout).
  (PR [#3735](https://github.com/pipecat-ai/pipecat/pull/3735))

- Fixed `LLMUserAggregator` broadcasting mute events before `StartFrame` reaches downstream processors.
  (PR [#3737](https://github.com/pipecat-ai/pipecat/pull/3737))

- Fixed `UserIdleController` false idle triggers caused by gaps between user and bot activity frames. The idle timer now starts only after `BotStoppedSpeakingFrame` and is suppressed during active user turns and function calls.
  (PR [#3744](https://github.com/pipecat-ai/pipecat/pull/3744))

- Fixed incorrect `sample_rate` assignment in `TavusInputTransport._on_participant_audio_data` (was using `audio.audio_frames` instead of `audio.sample_rate`).
  (PR [#3768](https://github.com/pipecat-ai/pipecat/pull/3768))

- Fixed `RTVIObserver` not processing upstream-only frames. Previously, all upstream frames were filtered out to avoid duplicate messages from broadcasted frames. Now only upstream copies of broadcasted frames are skipped.
  (PR [#3774](https://github.com/pipecat-ai/pipecat/pull/3774))

- Fixed mutable default arguments in `LLMContextAggregatorPair.__init__()` that could cause shared state across instances.
  (PR [#3782](https://github.com/pipecat-ai/pipecat/pull/3782))

- Fixed `DeepgramSageMakerSTTService` to properly track finalize lifecycle using `request_finalize()` / `confirm_finalize()` and use `is_final` (instead of `is_final and speech_final`) for final transcription detection, matching `DeepgramSTTService` behavior.
  (PR [#3784](https://github.com/pipecat-ai/pipecat/pull/3784))

- Fixed a race condition in `AudioContextTTSService` where the audio context could time out between consecutive TTS requests within the same turn, causing audio to be discarded.
  (PR [#3787](https://github.com/pipecat-ai/pipecat/pull/3787))

- Fixed `push_interruption_task_frame_and_wait()` hanging indefinitely when the `InterruptionFrame` does not reach the pipeline sink within the timeout.  Added a `timeout` keyword argument to customize the wait duration.
  (PR [#3789](https://github.com/pipecat-ai/pipecat/pull/3789))