Code-MCP

import { z } from "zod"; import { exec } from "child_process"; import { promisify } from "util"; import * as fs from "fs/promises"; import * as path from "path"; import * as os from "os"; const execAsync = promisify(exec); export const validateCodeSchema = { name: "validate_code", description: "Validates code syntax and formatting using available linters (e.g., Prettier). usage: providing code snippets to check for correctness before finalizing.", inputSchema: z.object({ code: z.string().describe("The code content to validate."), language: z .string() .describe( "The programming language (e.g., 'typescript', 'python', 'json').", ), }), }; export async function validateCodeHandler(args: any) { const { code, language } = args; // Create a temporary file to run validation against const tmpDir = os.tmpdir(); const fileName = `validate_${Date.now()}.${getExt(language)}`; const filePath = path.join(tmpDir, fileName); try { await fs.writeFile(filePath, code); // Default to Prettier for supported languages if ( [ "javascript", "typescript", "json", "css", "html", "markdown", "yaml", ].includes(language) ) { try { // Check syntax and formatting await execAsync(`npx prettier --check "${filePath}"`); // If checking passed, it's valid code (mostly) return { content: [ { type: "text", text: "✅ Code is valid and formatted correctly." }, ], }; } catch (error: any) { // Prettier error output usually contains the syntax error details return { content: [ { type: "text", text: `❌ Validation Failed:\n${error.stdout || error.stderr || error.message}`, }, ], }; } } // Fallback for other languages (mock validation for now, or add specific compilers like `python -m py_compile`) if (language === "python") { try { await execAsync(`python -m py_compile "${filePath}"`); return { content: [{ type: "text", text: "✅ Python syntax is valid." }], }; } catch (error: any) { return { content: [ { type: "text", text: `❌ Python Syntax Error:\n${error.stderr}` }, ], }; } } return { content: [ { type: "text", text: `⚠️ No specific validator configured for ${language}, but code was received.`, }, ], }; } catch (err: any) { return { content: [ { type: "text", text: `System Error during validation: ${err.message}`, }, ], }; } finally { // Cleanup try { await fs.unlink(filePath); } catch {} } } function getExt(lang: string): string { const map: Record<string, string> = { typescript: "ts", javascript: "js", python: "py", rust: "rs", go: "go", html: "html", css: "css", json: "json", }; return map[lang] || "txt"; }