delete_milestone

Instructions

Implementation Reference

• plane_mcp/tools/milestones.py:131-140 (handler)

  The delete_milestone tool handler function. It takes project_id and milestone_id, gets the Plane client context, and calls client.milestones.delete() to delete the milestone.

  def delete_milestone(project_id: str, milestone_id: str) -> None:
      """
      Delete a milestone by ID.
  
      Args:
          project_id: UUID of the project
          milestone_id: UUID of the milestone
      """
      client, workspace_slug = get_plane_client_context()
      client.milestones.delete(workspace_slug=workspace_slug, project_id=project_id, milestone_id=milestone_id)

• plane_mcp/tools/milestones.py:130-131 (registration)

  Decorator @mcp.tool() that registers delete_milestone as an MCP tool.

  @mcp.tool()
  def delete_milestone(project_id: str, milestone_id: str) -> None:

• plane_mcp/tools/__init__.py:48-48 (registration)

  Registration call: register_milestone_tools(mcp) which includes the delete_milestone tool.

  register_milestone_tools(mcp)

• plane_mcp/client.py:14-74 (helper)

  Helper function get_plane_client_context() that provides the Plane client instance and workspace slug used by delete_milestone.

  class PlaneClientContext(NamedTuple):
      """Context containing Plane client and workspace information."""
  
      client: PlaneClient
      workspace_slug: str
  
  
  def get_plane_client_context() -> PlaneClientContext:
      """
      Initialize and return a PlaneClient instance with workspace context.
  
      Authentication is handled by the PlaneOAuthProvider, which supports:
      1. Environment variables (PLANE_API_KEY + PLANE_WORKSPACE_SLUG)
      2. HTTP headers (x-api-key + x-workspace-slug)
      3. OAuth access token
  
      Environment variables:
      - PLANE_INTERNAL_BASE_URL: Internal URL for Plane API (preferred for server-to-server calls)
      - PLANE_BASE_URL: Base URL for Plane API (fallback, default: https://api.plane.so)
  
      Returns:
          PlaneClientContext containing configured PlaneClient instance and workspace slug
  
      Raises:
          ConfigurationError: If access token is not available or workspace slug is missing
      """
      base_url = os.getenv("PLANE_INTERNAL_BASE_URL") or os.getenv("PLANE_BASE_URL", "https://api.plane.so")
      workspace_slug = os.getenv("PLANE_WORKSPACE_SLUG", "")
  
      api_key = os.getenv("PLANE_API_KEY", "")
      access_token = None
  
      # Get access token from the OAuth provider (which handles all auth methods)
      stored_access_token: AccessToken | None = get_access_token()
      if stored_access_token:
          # Determine authentication method to use appropriate PlaneClient constructor
          auth_method = stored_access_token.claims.get("auth_method", "oauth")
          token = stored_access_token.token
          workspace_slug = stored_access_token.claims.get("workspace_slug", "")
  
          # For API key auth methods, use api_key parameter; for OAuth, use access_token
          if auth_method in ("api_key_env", "api_key_header"):
              api_key = token
          else:
              access_token = token
  
      if access_token:
          client = PlaneClient(
              base_url=base_url,
              access_token=access_token,
          )
      else:
          client = PlaneClient(
              base_url=base_url,
              api_key=api_key,
          )
  
      return PlaneClientContext(
          client=client,
          workspace_slug=workspace_slug,
      )