Method killAndWait

packages/cli/src/server/pty/manager.ts:320–353

* Kill a session and wait for the OS to reap the PTY (so a follow-up `spawn` * with the same sessionId doesn't trip the "already running" guard). Falls * back to dropping the handle if the exit event doesn't arrive in time — * SIGKILL the underlying pid first to make sure we're not leaking a p

(
		sessionId: string,
		timeoutMs = 2000,
	)

	 * SIGKILL the underlying pid first to make sure we're not leaking a process.
	 */
	async killAndWait(
		sessionId: string,
		timeoutMs = 2000,
	): Promise<boolean> {
		const handle = this.handles.get(sessionId);
		if (!handle) return false;
		if (handle.exited) {
			this.handles.delete(sessionId);
			return true;
		}

		const exited = await new Promise<boolean>(resolve => {
			const onExit = () => {
				clearTimeout(timer);
				resolve(true);
			};
			handle.exitSubscribers.add(onExit);
			const timer = setTimeout(() => {
				handle.exitSubscribers.delete(onExit);
				resolve(false);
			}, timeoutMs);
			this.kill(sessionId, 'SIGTERM');
		});

		if (!exited) {
			try {
				handle.pty.kill('SIGKILL');
			} catch {
				/* ignore */
			}
		}
		this.handles.delete(sessionId);
		return true;
	}

	killAll(): void {
		for (const sessionId of this.handles.keys()) {