Raise an error when attempting to use Gemini Multimodal Live with universal LLMContext. This is exactly the same error we already have for the other s2s models, AWS Nova Sonic and OpenAI Realtime, it was just missing from this service.

src/pipecat/services/gemini_multimodal_live/gemini.py

@@ -33,6 +33,7 @@ from pipecat.frames.frames import (
     InputAudioRawFrame,
     InputImageRawFrame,
     InputTextRawFrame,
+    LLMContextFrame,
     LLMFullResponseEndFrame,
     LLMFullResponseStartFrame,
     LLMMessagesAppendFrame,
@@ -738,6 +739,10 @@ class GeminiMultimodalLiveLLMService(LLMService):
                 # Support just one tool call per context frame for now
                 tool_result_message = context.messages[-1]
                 await self._tool_result(tool_result_message)
+        elif isinstance(frame, LLMContextFrame):
+            raise NotImplementedError(
+                "Universal LLMContext is not yet supported for Gemini Multimodal Live."
+            )
         elif isinstance(frame, InputTextRawFrame):
             await self._send_user_text(frame.text)
             await self.push_frame(frame, direction)