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/agent/gns3_copilot.py

@@ -128,10 +128,17 @@ class MessagesState(TypedDict):
 def llm_call(state: dict, config: RunnableConfig | None = None):
     """LLM decides whether to call a tool or not"""
 
-    # Extract config from LangGraph config
-    configurable = config.get("configurable", {}) if config else {}
-    jwt_token = configurable.get("jwt_token")
-    llm_config = configurable.get("llm_config")
+    # Get llm_config from request-scoped context variable
+    from gns3server.agent.gns3_copilot.gns3_client import get_current_llm_config
+    llm_config = get_current_llm_config()
+
+    if not llm_config:
+        logger.error("LLM config not found in context")
+        return {
+            "messages": [],
+            "llm_calls": state.get("llm_calls", 0),
+            "topology_info": None,
+        }
 
     # Defensive check: skip LLM call if no user messages
     messages = state.get("messages", [])
@@ -228,9 +235,13 @@ def generate_title(state: MessagesState, config: RunnableConfig | None = None) -
     This node is only executed when no title has been set yet (first round only).
     """
 
-    # Extract config from LangGraph config
-    configurable = config.get("configurable", {}) if config else {}
-    llm_config = configurable.get("llm_config")
+    # Get llm_config from request-scoped context variable
+    from gns3server.agent.gns3_copilot.gns3_client import get_current_llm_config
+    llm_config = get_current_llm_config()
+
+    if not llm_config:
+        logger.error("LLM config not found in context, cannot generate title")
+        return {"conversation_title": UNTITLED_SESSION_FALLBACK}
 
     # Only generate a title if it hasn't been set yet
     current_title = state.get("conversation_title")
@@ -306,15 +317,6 @@ def generate_title(state: MessagesState, config: RunnableConfig | None = None) -
 def tool_node(state: dict, config: RunnableConfig | None = None):
     """Performs the tool call"""
 
-    # Extract jwt_token from config for tools to use
-    configurable = config.get("configurable", {}) if config else {}
-    jwt_token = configurable.get("jwt_token")
-
-    # Set jwt_token for connector_factory to access
-    if jwt_token:
-        from gns3server.agent.gns3_copilot.gns3_client import set_current_jwt_token
-        set_current_jwt_token(jwt_token)
-
     result = []
     for tool_call in state["messages"][-1].tool_calls:
         tool = tools_by_name[tool_call["name"]]

gns3server/agent/gns3_copilot/agent_service.py

@@ -123,12 +123,18 @@ class AgentService:
         Yields:
             Dict containing SSE-compatible response chunks
         """
-        # Build config with LLM configuration and metadata
+        # Set request-scoped context variables (memory-only, not persisted)
+        if jwt_token:
+            from gns3server.agent.gns3_copilot.gns3_client import set_current_jwt_token
+            set_current_jwt_token(jwt_token)
+        if llm_config:
+            from gns3server.agent.gns3_copilot.gns3_client import set_current_llm_config
+            set_current_llm_config(llm_config)
+
+        # Build config - only thread-safe identifiers
         config = {
             "configurable": {
                 "thread_id": session_id,
-                "jwt_token": jwt_token,
-                "llm_config": llm_config,
             },
             "metadata": {
                 "user_id": user_id,

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