A parallel session in this shared checkout committed `027-the-instruments-were-the-
broken-part.md` at 00:05, but 027 was taken at 17:34 by `027-the-label-and-the-lens.md`
and 028 by `028-la-cale-and-the-empty-loop.md`. Renumbered to the next free slot;
content untouched, only the filename and the heading.

The captain's log is a sequence on purpose — it is the documentary's spine — so two
entries sharing a number is not cosmetic. Worth noting that a shared working tree makes
this collision structural rather than careless: neither session could see the other's
number until both had committed. A worktree per session avoids the `git add` race but
not this.