Node Omnibus MCP Server

Instructions

Implementation Reference

• src/index.ts:884-913 (handler)

  The handler function that executes the add_script tool: validates the project path, reads package.json, adds the new script, writes it back, and returns success message.
  private async handleAddScript(args: AddScriptArgs) { await this.validatePath(args.path); try { const packageJsonPath = path.join(args.path, 'package.json'); const packageJson = JSON.parse(await fs.readFile(packageJsonPath, 'utf-8')); if (!packageJson.scripts) { packageJson.scripts = {}; } packageJson.scripts[args.name] = args.command; await fs.writeFile(packageJsonPath, JSON.stringify(packageJson, null, 2)); return { content: [ { type: 'text', text: `Added script '${args.name}': ${args.command}`, }, ], }; } catch (error) { throw new McpError( ErrorCode.InternalError, `Failed to add script: ${error instanceof Error ? error.message : String(error)}` ); } }
• src/index.ts:55-59 (schema)

  TypeScript interface defining the expected input arguments for the add_script tool: path (project directory), name (script name), command (script command).
  interface AddScriptArgs extends Record<string, unknown> { path: string; name: string; command: string; }
• src/index.ts:324-345 (registration)

  Registration of the add_script tool in the ListToolsRequestSchema handler, providing name, description, and JSON schema for input validation.
  { name: 'add_script', description: 'Add a new npm script to package.json', inputSchema: { type: 'object', properties: { path: { type: 'string', description: 'Project directory path', }, name: { type: 'string', description: 'Script name', }, command: { type: 'string', description: 'Script command', }, }, required: ['path', 'name', 'command'], }, },
• src/index.ts:403-404 (registration)

  Dispatch registration in the CallToolRequestSchema switch statement that calls the handleAddScript function when 'add_script' is invoked.
  case 'add_script': return await this.handleAddScript(args as AddScriptArgs);