Development record

The v0.15.1 release review found the brief at .abcd/development/brief/04-surfaces/08-abcd.md:232-259 out of step with the shipped code. It says: abcd peers' one network act is a fetch from origin of every abcd-reserved/ branch (pruned) and of the default branch, which updates the remote-tracking reservation branches and stamps when it ran; the listing is reservations, per-person li… In the code: abcd peers --help (and commands/peers.md:15-19) says the fetch also reads origin's release tags v* and writes them under refs/abcd/release-tags/, and the listing adds a line for each release being cut (a live rel-vX.Y.Z reservation). The fetch and refs are documented in 37-reserve.md:315, but this chapter's enumeratio…