Function writeAtomic

src/session/contract.js:84–89

(filePath, content)

// ─── Atomic writes ───────────────────────────────────────────────────────────

function writeAtomic(filePath, content) {
  fs.mkdirSync(path.dirname(filePath), { recursive: true });
  const tmp = filePath + '.' + crypto.randomBytes(4).toString('hex') + '.tmp';
  fs.writeFileSync(tmp, content, { mode: FILE_MODE });
  fs.renameSync(tmp, filePath);
}

function appendJsonl(filePath, obj) {
  fs.mkdirSync(path.dirname(filePath), { recursive: true });