Function isCodexJsonlFormat

actions/setup/js/parse_codex_log.cjs:306–321

* Detects whether the log is in the Codex experimental JSONL event format. * Newer Codex CLI versions (e.g. 0.141+) emit a stream of JSON objects such as * `{"type":"thread.started",...}`, `{"type":"turn.completed",...}` and * `{"type":"item.completed","item":{"type":"agent_message",...}}` instea

(lines)

 * @returns {boolean} True if at least one Codex JSONL event line is present
 */
function isCodexJsonlFormat(lines) {
  for (const line of lines) {
    const trimmed = line.trim();
    if (!trimmed.startsWith("{")) continue;
    let event;
    try {
      event = JSON.parse(trimmed);
    } catch {
      continue;
    }
    if (event && typeof event === "object" && typeof event.type === "string" && /^(thread|turn|item)\./.test(event.type)) {
      return true;
    }
  }
  return false;
}

/**
 * Parse the Codex experimental JSONL event stream into the shared logEntries model.