Every run writes one file under Documents, Sialk, logs: the build that started, what went on the wall and when, blackouts and pauses, the opening-hours boundaries, and every problem. One line per event, so a run that dies mid-frame still leaves everything up to that moment.
Settings, The log shows the same in sentences, and Show the file reveals it in Finder for attaching to an email.
It is the first thing to send when something went wrong overnight, and the whole answer to "what was showing at nine?".