Yes the key is we don't intercept requests and responses, that saves 60% of the headache of lifecycle management.

We do exactly what you described with a 1+1 check in a loop for every target, it pops any crashed sessions from the pool, and we don't keep any state beyond that about what tabs are alive. We really try to derive everything fresh from the browser on every call, with minimal in-memory state.

https://github.com/browser-use/browser-use/blob/2a0f4bd93a43...