Execute command with streaming output.

Executes a long-running command in a sandbox and streams stdout/stderr in real-time.

Response Format: NDJSON (Newline Delimited JSON) - each line is a JSON object.

Streaming Behavior:

• Output chunks are sent as they're produced by the command
• When the command completes, a final chunk with exit_code is sent

Client Disconnection:

• When the client closes the connection, the running process is automatically terminated

Example Client Code:

const response = await fetch(url, { method: 'POST', body: JSON.stringify({ command: 'npm run dev' }) });
const reader = response.body.getReader();
const decoder = new TextDecoder();

while (true) {
  const { done, value } = await reader.read();
  if (done) break;
  const lines = decoder.decode(value).split('\n').filter(Boolean);
  for (const line of lines) {
    const { stdout, stderr, exit_code } = JSON.parse(line);
    if (stdout) process.stdout.write(stdout);
    if (stderr) process.stderr.write(stderr);
  }
}

{
  "command": "npm run dev"
}