Function handle

e2e/local/fixtures/stdio-mcp-server.mjs:66–114

(msg)

}

const handle = (msg) => {
  if (msg.method === "initialize") {
    send({
      jsonrpc: "2.0",
      id: msg.id,
      result: {
        // Echo the client's protocol version so we never fail version
        // negotiation against whatever SDK build is on the other end.
        protocolVersion: msg.params?.protocolVersion ?? "2025-06-18",
        capabilities: { tools: {} },
        serverInfo: { name: "executor-e2e-stdio", version: "1.0.0" },
      },
    });
    return;
  }

  // Notifications carry no id and expect no response.
  if (msg.id === undefined || msg.id === null) return;

  if (msg.method === "ping") {
    send({ jsonrpc: "2.0", id: msg.id, result: {} });
    return;
  }

  if (msg.method === "tools/list") {
    send({ jsonrpc: "2.0", id: msg.id, result: { tools: TOOLS } });
    return;
  }

  if (msg.method === "tools/call") {
    const name = msg.params?.name;
    const text =
      name === "whoami"
        ? (process.env.EXECUTOR_E2E_SECRET ?? "")
        : String(msg.params?.arguments?.text ?? "");
    send({
      jsonrpc: "2.0",
      id: msg.id,
      result: { content: [{ type: "text", text }] },
    });
    return;
  }

  send({
    jsonrpc: "2.0",
    id: msg.id,
    error: { code: -32601, message: `Method not found: ${msg.method}` },
  });
};

const rl = createInterface({ input: process.stdin });
rl.on("line", (line) => {