bug fix sending component

app/core/llm.py

@@ -23,10 +23,15 @@ from openai import AsyncOpenAI
 import litellm
 
 from langchain_openai import ChatOpenAI
+from langchain_litellm import ChatLiteLLM
 from litellm import get_supported_openai_params  # noqa: F401 – validates install
 
 from app.config.settings import settings
 
+# Some models (e.g. gpt-5, o-series) reject unsupported params like temperature.
+# Drop them silently instead of raising UnsupportedParamsError.
+litellm.drop_params = True
+
 
 def _api_key_for_model(model: str) -> str | None:
     """Return the most appropriate API key for the given LiteLLM model string."""
@@ -48,7 +53,7 @@ def get_llm(
     *,
     model: str | None = None,
     temperature: float = 0,
-) -> ChatOpenAI:
+) -> ChatOpenAI | ChatLiteLLM:
     """Return a LangChain chat model backed by LiteLLM.
 
     LiteLLM exposes an OpenAI-compatible API, so we use ``ChatOpenAI`` pointed
@@ -69,6 +74,11 @@ def get_llm(
     if settings.GITHUB_COPILOT_TOKEN_DIR:
         os.environ.setdefault("GITHUB_COPILOT_TOKEN_DIR", settings.GITHUB_COPILOT_TOKEN_DIR)
 
+    # Use ChatLiteLLM for provider-prefixed models (github_copilot/, anthropic/, etc.)
+    # so LiteLLM handles routing and auth. ChatOpenAI for plain OpenAI model names.
+    if "/" in model:
+        return ChatLiteLLM(model=model, temperature=temperature)
+
     return ChatOpenAI(
         model=model,
         temperature=temperature,
@@ -79,7 +89,7 @@ def get_llm(
 def get_router_llm(
     *,
     temperature: float = 0,
-) -> ChatOpenAI:
+) -> ChatOpenAI | ChatLiteLLM:
     """Return the lighter model used for intent classification / routing."""
     return get_llm(model=settings.LLM_ROUTER_MODEL, temperature=temperature)