Filesystem MCP

import type {McpServer} from '@modelcontextprotocol/sdk/server/mcp.js'; import {z} from 'zod'; import * as fs from 'node:fs/promises'; import * as path from 'node:path'; import {jsonResult} from '../utils/response.js'; import {expandPath} from '../utils/paths.js'; const description = `Create or overwrite a file with the specified content. - Creates parent directories if they don't exist - Overwrites existing files without warning - Use absolute paths`; export function registerCreate(server: McpServer): void { server.registerTool( 'create', { title: 'Create', description, inputSchema: { path: z.string().describe('Absolute path where file will be created'), content: z.string().describe('Content to write to the file'), }, annotations: { readOnlyHint: false, destructiveHint: true, }, }, async (args) => { const targetPath = expandPath(args.path); const {content} = args; // Create parent directories if needed const dir = path.dirname(targetPath); await fs.mkdir(dir, {recursive: true}); // Write the file await fs.writeFile(targetPath, content, 'utf-8'); return jsonResult({ success: true, path: targetPath, bytesWritten: Buffer.byteLength(content, 'utf-8'), }); }, ); }