Lightroom Classic MCP

Instructions

Implementation Reference

• src/lightroom_mcp_custom/server.py:763-775 (handler)

  The apply_snapshot tool handler, which validates inputs and calls the develop.apply_snapshot method.

  @mcp.tool()
  async def apply_snapshot(
      snapshot_id: str,
      local_ids: list[int] | None = None,
  ) -> dict[str, Any]:
      """Apply a develop snapshot by its ID."""
      if not snapshot_id:
          raise ValueError("snapshot_id is required")
      ids = validate_local_ids(local_ids)
      payload: dict[str, Any] = {"snapshot_id": snapshot_id}
      if ids:
          payload["local_ids"] = ids
      return await _call("develop.apply_snapshot", payload)