Function runMCP

bin/smallcode.js:2836–2856

()

// ─── MCP Server Mode ─────────────────────────────────────────────────────────

function runMCP() {
  // Minimal MCP server implementation over stdio.
  // Tool calls are handled async — we buffer the response and write it
  // when the handler resolves. This fixes the bug where smallcode_agent
  // (which calls the async runAgentLoop) would return before completing.
  const rl = readline.createInterface({ input: process.stdin });

  rl.on('line', async (line) => {
    try {
      const request = JSON.parse(line);
      const response = await handleMCPRequest(request);
      console.log(JSON.stringify(response));
    } catch (err) {
      console.log(JSON.stringify({
        jsonrpc: '2.0',
        id: null,
        error: { code: -32700, message: 'Parse error' }
      }));
    }
  });
}

async function handleMCPRequest(request) {
  const { id, method } = request;