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The purpose model was person-centric, so an auth-required NIP-28 channel,
NIP-72 community, or NIP-53 live stream broke: reads filter by #e/#a with
no authors, so nothing was attributable -> silent DENY (chat wouldn't
load); top-level posts (no p tags) also silently failed; replies were
mis-attributed as "notify" and trusted on the wrong signal.
Add venue purposes (POST_VENUE / READ_VENUE) carrying the venue id
(channel event-id, or community/live `kind:pubkey:dTag` address). The
deriver recognizes kind-42 channel posts (root `e`), community/live posts
and reads (`#a` 34550/30311), and channel reads (`#e`). Venues are trusted
under TRUSTED_FOLLOWS when you've joined them (publicChatList /
communityList) or their owner — the pubkey in the address, e.g. a live
stream's host — is someone you follow; trusted venues auto-auth for both
reading and posting.
Safety net: any active use we still can't attribute yields an OTHER
purpose so the relay is prompted about instead of failing silently.
Prompt copy gains venue-aware titles/consequences ("Post to this room?",
"If you don't, your message won't be posted."). Default policy already
TRUSTED_FOLLOWS, so joined venues just work. Unit-tested across resolver
and deriver.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EZjmYpgHP4pf79Sav5QT8a