Taiga MCP Bridge

Instructions

Implementation Reference

• src/server.py:871-893 (handler)

  The handler function for the 'create_epic' MCP tool. It authenticates the session, validates input, and uses the TaigaClientWrapper to create an epic via the pytaigaclient API.

  @mcp.tool("create_epic", description="Creates a new epic within a project.")
  def create_epic(session_id: str, project_id: int, subject: str, **kwargs) -> Dict[str, Any]:
      """Creates an epic. Requires project_id and subject. Optional fields (description, status_id, assigned_to_id, color, etc.) via kwargs."""
      logger.info(
          f"Executing create_epic '{subject}' in project {project_id}, session {session_id[:8]}...")
      taiga_client_wrapper = _get_authenticated_client(session_id) # Use wrapper variable name
      if not subject:
          raise ValueError("Epic subject cannot be empty.")
      try:
          # Use pytaigaclient syntax: client.resource.create(project=..., subject=..., **kwargs)
          epic = taiga_client_wrapper.api.epics.create(project=project_id, subject=subject, **kwargs)
          logger.info(f"Epic '{subject}' created successfully (ID: {epic.get('id', 'N/A')}).")
          # return epic.to_dict() # Remove .to_dict()
          return epic # Return directly
      except TaigaException as e:
          logger.error(
              f"Taiga API error creating epic '{subject}': {e}", exc_info=False)
          raise e
      except Exception as e:
          logger.error(
              f"Unexpected error creating epic '{subject}': {e}", exc_info=True)
          raise RuntimeError(f"Server error creating epic: {e}")

• src/server.py:39-52 (helper)

  Helper function used by create_epic (and other tools) to retrieve the authenticated TaigaClientWrapper instance from the active_sessions dictionary based on 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 by create_epic handler to interact with the Taiga API via pytaigaclient. Handles login and provides the api.epics.create 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}")

• src/server.py:871-871 (registration)

  The @mcp.tool decorator registers the create_epic function as an MCP tool with the specified name and description.

  @mcp.tool("create_epic", description="Creates a new epic within a project.")