Development record

`.abcd/development/brief/06-delivery/02-verification-matrix.md:26`: The verification matrix's ahoy idempotency row quotes wording and a visibility re-confirm the binary does not produce. The binary cannot print that wording: 'already up to date' occurs under internal/core/ahoy and internal/surface/cli only in a code comment (internal/core/ahoy/ahoy.go:282). The line is `abcd is already set up here; nothing changed.` (internal/core/ahoy/setup_report.go:32), and commands/ahoy.md says a fully set-up repository is reported in that one line with nothing written, so no visibility re-confirm appears.