fix(llm): pass reasoning_key to OpenAILegacy provider

src/kimi_cli/config.py

@@ -44,6 +44,8 @@ class LLMProvider(BaseModel):
     """Environment variables to set before creating the provider instance"""
     custom_headers: dict[str, str] | None = None
     """Custom headers to include in API requests"""
+    reasoning_key: str | None = None
+    """Key name for reasoning/thinking content in OpenAI-compatible API responses (e.g. "reasoning_content")."""
     oauth: OAuthRef | None = None
     """OAuth credential reference (do not store tokens here)."""
 

src/kimi_cli/llm.py

@@ -152,6 +152,7 @@ def create_llm(
                 model=model.model,
                 base_url=provider.base_url,
                 api_key=resolved_api_key,
+                reasoning_key=provider.reasoning_key,
             )
         case "openai_responses":
             from kosong.contrib.chat_provider.openai_responses import OpenAIResponses