- com.imlunahey.atrium.figure record not from the namespace authority An atrium avatar appearance — body + head colors. One record per user (rkey=self). Read on join, written when the user customizes their figure. Future revisions will add hair / shirt / pants / hat layers; clients should ignore unknown properties.
- com.imlunahey.atrium.furniture record not from the namespace authority A furniture item the user owns in the atrium hangout. One record per item (rkey=tid); the inventory is the collection of records under this collection. Placement in a specific room is a separate concern (handled by a per-room layout record in a future revision).
- com.imlunahey.guestbook.entry record A signed guestbook entry left on another actor's guestbook marker. The entry record lives on the author's own PDS; the marker it references is owned by the site operator.
- com.imlunahey.guestbook.marker record A marker record identifying a surface (a website, profile, project) that accepts com.imlunahey.guestbook.entry records. The marker lives on the operator's own PDS; entries reference it by AT-URI. Using `self` as the rkey means a single canonical guestbook per actor.
- com.imlunahey.leaderboard.marker record Identifies a leaderboard surface. Score records reference this by AT-URI via their `subject` field; constellation indexes those references so the site can list scores without running a firehose subscriber.
- com.imlunahey.leaderboard.score record A signed leaderboard score. Users play locally, call /api/sign-score on the site which validates the run and returns a server HMAC, then createRecord on their own PDS. Records without a valid server signature are ignored when rendering the leaderboard.