The fediverse box recorded `name@bridge` and performed nothing — and the two values a bridge requires, an identity root and a feed key, appear nowhere in this UI, so from a handset a name could not be obtained at all. Now the settings page asks: `bridge-claim` fetches a single-use challenge from the bridge over the swarm, signs bytes binding this name and this feed, and sends both. The bridge verifies the chain proof with the root pinned inside the verifier. Neither side defines those bytes alone. Also carries the hpp boot from 0.0.25's line of work, so this device is a writer of its atproto identity rather than only a holder of one. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>