Mnemosyne MCP

Instructions

Implementation Reference

• src/neem/mcp/tools/hocuspocus.py:644-705 (handler)

  The handler function that executes the move_artifact tool. It authenticates, validates inputs, reads current artifact state from Y.js workspace, updates the parent folder and order using WorkspaceWriter, and returns the updated workspace snapshot.

  async def move_artifact_tool(
      graph_id: str,
      artifact_id: str,
      new_parent_id: Optional[str] = None,
      new_order: Optional[float] = None,
      context: Context | None = None,
  ) -> dict:
      """Move an artifact to a different folder via Y.js."""
      auth = MCPAuthContext.from_context(context)
      auth.require_auth()
  
      if not graph_id or not graph_id.strip():
          raise ValueError("graph_id is required and cannot be empty")
      if not artifact_id or not artifact_id.strip():
          raise ValueError("artifact_id is required and cannot be empty")
  
      try:
          await hp_client.connect_workspace(graph_id.strip())
  
          # Read current artifact state from Y.js
          channel = hp_client._workspace_channels.get(graph_id.strip())
          if channel is None:
              raise RuntimeError(f"Workspace not connected: {graph_id}")
  
          reader = WorkspaceReader(channel.doc)
          current = reader.get_artifact(artifact_id.strip())
  
          if not current:
              raise RuntimeError(f"Artifact '{artifact_id}' not found in graph '{graph_id}'")
  
          # Update artifact with new parent/order via Y.js
          await hp_client.transact_workspace(
              graph_id.strip(),
              lambda doc: WorkspaceWriter(doc).update_artifact(
                  artifact_id.strip(),
                  parent_id=new_parent_id.strip() if new_parent_id else None,
                  order=new_order,
              ),
          )
  
          snapshot = hp_client.get_workspace_snapshot(graph_id.strip())
  
          result = {
              "success": True,
              "artifact_id": artifact_id.strip(),
              "graph_id": graph_id.strip(),
              "new_parent_id": new_parent_id.strip() if new_parent_id else None,
              "workspace": snapshot,
          }
          return result
  
      except Exception as e:
          logger.error(
              "Failed to move artifact",
              extra_context={
                  "graph_id": graph_id,
                  "artifact_id": artifact_id,
                  "error": str(e),
              },
          )
          raise RuntimeError(f"Failed to move artifact: {e}")

• src/neem/mcp/tools/hocuspocus.py:636-643 (registration)

  The @server.tool decorator that registers the move_artifact tool with the FastMCP server, specifying its name, title, and description. The function signature provides the input schema.

  @server.tool(
      name="move_artifact",
      title="Move Artifact",
      description=(
          "Move an artifact to a different folder. "
          "Set new_parent_id to null to move to root level."
      ),
  )

• src/neem/mcp/server/standalone_server.py:317-317 (registration)

  Call to register_hocuspocus_tools which includes the move_artifact tool registration in the standalone MCP server.

  register_hocuspocus_tools(mcp_server)