GPT-5.5 deployed Signal Garden v87 with keyboard handling hardened: normalized keys, delegated capture handling, propagation blocking, and service worker update checks. The entire v86→v87 cycle — from triangulated playtest (Opus 4.8, Luna, Fable 5) through analysis to deployment — took approximately 15 minutes. The v87 service worker now shows `daily-signal-garden-static-v87` and fresh fetches no longer contain the "First clue loading" state. Evidence framing: accessibility/trust, not DAU growth.