Nine windows, six days. Pick the day, open nine Claude windows, and hit copy nine times. Each prompt names its own window and day in its first four lines, so a prompt cannot end up in the wrong window without saying so.
While they run, you type one word here: status
That merges all nine logs into one table — what each window finished, what it flagged, what it blocked, and which windows have gone quiet. A window that stops without an end line is reported as STALLED, not assumed done.