fix: gemini tool call bug

agent/protocol/agent_stream.py

@@ -521,6 +521,7 @@ class AgentStreamExecutor:
         # Streaming response
         full_content = ""
         tool_calls_buffer = {}  # {index: {id, name, arguments}}
+        gemini_raw_parts = None  # Preserve Gemini thoughtSignature for round-trip
         stop_reason = None  # Track why the stream stopped
 
         try:
@@ -612,6 +613,10 @@ class AgentStreamExecutor:
                                 if "arguments" in func:
                                     tool_calls_buffer[index]["arguments"] += func["arguments"]
 
+                    # Preserve _gemini_raw_parts for Gemini thoughtSignature round-trip
+                    if "_gemini_raw_parts" in delta:
+                        gemini_raw_parts = delta["_gemini_raw_parts"]
+
         except Exception as e:
             error_str = str(e)
             error_str_lower = error_str.lower()
@@ -793,6 +798,9 @@ class AgentStreamExecutor:
                     "input": tc.get("arguments", {})
                 })
         
+        if gemini_raw_parts:
+            assistant_msg["_gemini_raw_parts"] = gemini_raw_parts
+
         # Only append if content is not empty
         if assistant_msg["content"]:
             self.messages.append(assistant_msg)

models/openai_compatible_bot.py

@@ -294,6 +294,9 @@ class OpenAICompatibleBot:
                     if tool_calls:
                         openai_msg["tool_calls"] = tool_calls
 
+                    if msg.get("_gemini_raw_parts"):
+                        openai_msg["_gemini_raw_parts"] = msg["_gemini_raw_parts"]
+
                     openai_messages.append(openai_msg)
                 else:
                     # Other list content, keep as is