docs: update for pipecat PR #4130

server/services/s2s/aws.mdx

@@ -256,5 +256,5 @@ async def get_weather(function_name, tool_call_id, args, llm, context, result_ca
 - **Endpointing sensitivity**: Only supported with Nova 2 Sonic. Controls how quickly the model decides the user has stopped speaking -- `"HIGH"` causes the model to respond most quickly.
 - **Transcription frames**: User speech transcription frames are always emitted upstream. Assistant text transcripts are delivered in real-time using speculative text events, providing text synchronized with audio output for responsive client UIs.
 - **Connection resilience**: If a connection error occurs while the service wants to stay connected, it automatically resets the conversation and reconnects.
-- **System instruction and tools precedence**: Instructions and tools provided in the LLM context take precedence over those provided at initialization time.
+- **System instruction precedence**: The `system_instruction` from service settings takes precedence over an initial system message in the LLM context. A warning is logged when both are set. Tools provided in the LLM context take precedence over those provided at initialization time.
 - **Audio format**: Uses LPCM (Linear PCM) audio format for both input and output. Input defaults to 16kHz and output defaults to 24kHz.

server/services/s2s/gemini-live.mdx

@@ -286,7 +286,7 @@ llm = GeminiLiveLLMService(
 ## Notes
 
 - **Model support**: The service supports both Gemini 2.5 and Gemini 3.x models. The service automatically detects and handles model-specific behavior.
-- **System instruction precedence**: If a system instruction is provided both at init time and in the LLM context, the context-provided value takes precedence.
+- **System instruction precedence**: The `system_instruction` from service settings takes precedence over an initial system message in the LLM context. A warning is logged when both are set.
 - **Tools precedence**: Similarly, tools provided in the context override tools provided at init time.
 - **Transcription aggregation**: Gemini Live sends user transcriptions in small chunks. The service aggregates them into complete sentences using end-of-sentence detection with a 0.5-second timeout fallback.
 - **Session resumption**: The service automatically handles session resumption on reconnection using session resumption handles.

server/services/s2s/grok.mdx

@@ -254,6 +254,7 @@ await task.queue_frame(
 - **Audio before setup**: Audio is not sent to Grok until the conversation setup is complete, preventing sample rate mismatches.
 - **Available voices**: Ara (default), Rex, Sal, Eve, and Leo.
 - **G.711 support**: PCMU and PCMA formats are supported at a fixed 8000 Hz rate, useful for telephony integrations.
+- **System instruction precedence**: The `system_instruction` from service settings takes precedence over an initial system message in the LLM context. A warning is logged when both are set.
 
 ## Event Handlers
 

server/services/s2s/openai.mdx

@@ -301,6 +301,7 @@ await task.queue_frame(
 - **Audio output format**: The service outputs 24kHz PCM audio by default.
 - **Video support**: Video frames can be sent to the model for multimodal input. Control the detail level with `video_frame_detail` and pause/resume with `set_video_input_paused()`.
 - **Transcription frames**: User speech transcription frames are always emitted upstream when input audio transcription is configured.
+- **System instruction precedence**: The `system_instruction` from service settings takes precedence over an initial system message in the LLM context. A warning is logged when both are set.
 
 ## Event Handlers