feat(copilot): replace LangGraph config with request-scoped context variables

- Refactor `llm_call` and `generate_title` nodes to retrieve `llm_config` from request-scoped context variable instead of LangGraph config
- Remove `jwt_token` and `llm_config` from LangGraph configurable parameters in `AgentService.stream`
- Add `set_current_llm_config` and `get_current_llm_config` functions to `connector_factory` and export them in `__init__.py`
- Update `tool_node` to no longer extract `jwt_token` from config as it is now handled via context variable
- Improves thread safety and decouples configuration from LangGraph's state management

gns3server/agent/gns3_copilot/gns3_client/__init__.py

@@ -27,6 +27,8 @@ from .connector_factory import (
     get_llm_config,
     set_current_jwt_token,
     get_current_jwt_token,
+    set_current_llm_config,
+    get_current_llm_config,
 )
 from .custom_gns3fy import (
     CONSOLE_TYPES,
@@ -66,4 +68,6 @@ __all__ = [
     "get_llm_config",
     "set_current_jwt_token",
     "get_current_jwt_token",
+    "set_current_llm_config",
+    "get_current_llm_config",
 ]

gns3server/agent/gns3_copilot/gns3_client/connector_factory.py

@@ -30,9 +30,10 @@ import logging
 from typing import Optional
 from contextvars import ContextVar
 
-# Context variable for request-scoped jwt_token
+# Context variables for request-scoped data
 # Automatically cleaned up when request context ends
 _jwt_token_context: ContextVar[Optional[str]] = ContextVar("_jwt_token_context", default=None)
+_llm_config_context: ContextVar[Optional[dict]] = ContextVar("_llm_config_context", default=None)
 
 
 def set_current_jwt_token(token: str) -> None:
@@ -43,6 +44,16 @@ def set_current_jwt_token(token: str) -> None:
 def get_current_jwt_token() -> Optional[str]:
     """Get the JWT token for the current request context."""
     return _jwt_token_context.get()
+
+
+def set_current_llm_config(config: dict) -> None:
+    """Set the LLM config for the current request context."""
+    _llm_config_context.set(config)
+
+
+def get_current_llm_config() -> Optional[dict]:
+    """Get the LLM config for the current request context."""
+    return _llm_config_context.get()
 from uuid import UUID
 
 from gns3server.agent.gns3_copilot.gns3_client.custom_gns3fy import Gns3Connector