Method stop

src/tools/shell_session.js:268–275

* Stop the shell process. Idempotent.

()

   * Stop the shell process. Idempotent.
   */
  stop() {
    this._failPending('shell stopped');
    if (this.proc) {
      try { this.proc.kill(); } catch {}
      this.proc = null;
    }
    this._dead = true;
  }

  // ─── Internal ──────────────────────────────────────────────────────────