pipecat/changelog/3175.added.md

• Added additional functionality related to "thinking", for Google and Anthropic LLMs.

  1. New typed parameters for Google and Anthropic LLMs that control the models' thinking behavior (like how much thinking to do, and whether to output thoughts or thought summaries):
     • AnthropicLLMService.ThinkingConfig
     • GoogleLLMService.ThinkingConfig
  2. New frames for representing thoughts output by LLMs:
     • LLMThoughtStartFrame
     • LLMThoughtTextFrame
     • LLMThoughtEndFrame
  3. A generic mechanism for recording LLM thoughts to context, used specifically to support Anthropic, whose thought signatures are expected to appear alongside the text of the thoughts within assistant context messages. See:
     • LLMThoughtEndFrame.signature
     • LLMAssistantAggregator handling of the above field
     • AnthropicLLMAdapter handling of "thought" context messages
  4. Google-specific logic for inserting thought signatures into the context, to help maintain thinking continuity in a chain of LLM calls. See:
     • GoogleLLMService sending LLMMessagesAppendFrames to add LLM-specific "thought_signature" messages to context
     • GeminiLLMAdapter handling of "thought_signature" messages
  5. An expansion of TranscriptProcessor to process LLM thoughts in addition to user and assistant utterances. See:
     • TranscriptProcessor(process_thoughts=True) (defaults to False)
     • ThoughtTranscriptionMessage, which is now also emitted with the "on_transcript_update" event