Development record

The reserve chapter's Exits section enumerates what exits 3 and puts every other refusal and failure at exit 2 (.abcd/development/brief/04-surfaces/37-reserve.md:945). The one-release-at-a-time back-off described at line 560 is not listed, and reserving a release while another release is being cut exits 3 (internal/core/claim/withdrawact.go:1351, internal/surface/cli/reserve.go:538-539), including when the same person and copy hold the other release.