Presence, replaced by a regex

The junior engineer is running the migration you're nervous about. The old move is an hour on a screen-share call, mostly watching things go fine.

Instead, a small script loops POST /api/v1/terminal/wait against their shared session: mode: regex, pattern Traceback|ERROR, search_scope: scrollback. Each call blocks up to five minutes, then re-arms. The moment the pattern hits, the response arrives with an atomic snapshot of the screen at that instant, the script fires a notification to your phone, and you open the shared terminal: at the minute it broke, not the fifty-nine where it didn't.

They get room to work. You get the exact failure, the moment it exists.

You don't watch them work. You subscribe to their failures.