Taiga MCP Bridge

Instructions

Implementation Reference

• src/server.py:321-339 (handler)

  The primary handler function for the MCP tool 'get_user_story'. It authenticates the session, fetches the user story by ID using the Taiga API client, and returns the details. Includes the @mcp.tool decorator for registration.

  @mcp.tool("get_user_story", description="Gets detailed information about a specific user story by its ID.")
  def get_user_story(session_id: str, user_story_id: int) -> Dict[str, Any]:
      """Retrieves user story details by ID."""
      logger.info(
          f"Executing get_user_story ID {user_story_id} for session {session_id[:8]}...")
      taiga_client_wrapper = _get_authenticated_client(session_id) # Use wrapper variable name
      try:
          # User stories expects user_story_id as a positional argument
          story = taiga_client_wrapper.api.user_stories.get(user_story_id)
          # return story.to_dict() # Remove .to_dict()
          return story # Return directly
      except TaigaException as e:
          logger.error(
              f"Taiga API error getting user story {user_story_id}: {e}", exc_info=False)
          raise e
      except Exception as e:
          logger.error(
              f"Unexpected error getting user story {user_story_id}: {e}", exc_info=True)
          raise RuntimeError(f"Server error getting user story: {e}")

• src/server.py:39-52 (helper)

  Helper function used by get_user_story (and other tools) to retrieve and validate the authenticated Taiga client for the given session ID.

  def _get_authenticated_client(session_id: str) -> TaigaClientWrapper:
      """
      Retrieves the authenticated TaigaClientWrapper for a given session ID.
      Raises PermissionError if the session is invalid or not found.
      """
      client = active_sessions.get(session_id)
      # Also check if the client object itself exists and is authenticated
      if not client or not client.is_authenticated:
          logger.warning(f"Invalid or expired session ID provided: {session_id}")
          # Raise PermissionError - FastMCP will map this to an appropriate error response
          raise PermissionError(
              f"Invalid or expired session ID: '{session_id}'. Please login again.")
      logger.debug(f"Retrieved valid client for session ID: {session_id}")
      return client

• src/taiga_client.py:15-29 (helper)

  The TaigaClientWrapper class imported and used in get_user_story handler. It wraps pytaigaclient.TaigaClient and handles login/authentication, providing the .api.user_stories.get() method.

  class TaigaClientWrapper:
      """
      A wrapper around the pytaiga-client library to manage API instance
      and authentication state.
      """
  
      def __init__(self, host: str):
          if not host:
              raise ValueError("Taiga host URL cannot be empty.")
          # Store host, but initialize client later during login/token auth
          self.host = host
          # Use the new client type
          self.api: Optional[TaigaClient] = None
          logger.info(f"TaigaClientWrapper initialized for host: {self.host}")