ComfyUI MCP Server

Instructions

Implementation Reference

• src/tools/workflows.ts:155-194 (handler)

  The handler function for the 'comfy_delete_workflow' tool. Validates the confirmation flag, calls the filesystem delete helper, and returns a formatted MCP response with success or error details.

  export async function handleDeleteWorkflow(input: DeleteWorkflowInput) {
    try {
      if (!input.confirm) {
        throw ComfyUIErrorBuilder.validationError(
          'Set confirm=true to delete the workflow'
        );
      }
  
      deleteWorkflowFromLibrary(input.name);
  
      return {
        content: [{
          type: "text",
          text: JSON.stringify({
            name: input.name,
            deleted: true,
            message: `Workflow "${input.name}" deleted successfully`
          }, null, 2)
        }]
      };
    } catch (error: any) {
      if (error.message.includes('not found')) {
        return {
          content: [{
            type: "text",
            text: JSON.stringify(ComfyUIErrorBuilder.fileNotFound(input.name), null, 2)
          }],
          isError: true
        };
      }
  
      return {
        content: [{
          type: "text",
          text: JSON.stringify(ComfyUIErrorBuilder.executionError(error.message), null, 2)
        }],
        isError: true
      };
    }
  }

• src/types/tools.ts:104-108 (schema)

  Zod schema defining the input parameters for the comfy_delete_workflow tool: workflow name (required) and confirmation flag (optional, defaults to false).

  // Delete Workflow Tool
  export const DeleteWorkflowSchema = z.object({
    name: z.string(),
    confirm: z.boolean().optional().default(false)
  });

• src/server.ts:107-111 (registration)

  Registration of the 'comfy_delete_workflow' tool in the MCP server, including name, description, and input schema reference.

  {
    name: 'comfy_delete_workflow',
    description: 'Delete a saved workflow from the MCP library. Requires confirmation for safety.',
    inputSchema: zodToJsonSchema(DeleteWorkflowSchema) as any,
  },

• src/utils/filesystem.ts:250-260 (helper)

  Supporting utility function that performs the actual file deletion of the workflow JSON from the configured library directory.

  export function deleteWorkflowFromLibrary(name: string): void {
    const config = getConfig();
    const libraryPath = getFullPath(config.paths.workflow_library);
    const filePath = join(libraryPath, `${name}.json`);
  
    if (!existsSync(filePath)) {
      throw new Error(`Workflow not found: ${name}`);
    }
  
    unlinkSync(filePath);
  }