Function cleanup

src/tools/shell_session.js:337–337

()

if (!global.__SMALLCODE_SHELL_EXIT_REGISTERED__) {
  global.__SMALLCODE_SHELL_EXIT_REGISTERED__ = true;
  const cleanup = () => { if (_instance) try { _instance.stop(); } catch {} };
  process.on('exit', cleanup);
  process.on('SIGINT', cleanup);
  process.on('SIGTERM', cleanup);