Personas have walls their followers write on

Owner decision of 2026-10-06 (G-0009, FEP-400e). A persona's actor names its wall (…/graffiti, sm:wall) and, in
Smithereen's privacySettings, that its followers may write on it. A public post that is not a reply, sent with the wall
as its target by an account following the persona, is hosted: the persona is notified, it reaches the persona's and its
followers' homes, and the followers' servers and the author's are told with Add{Note}. The persona deletes it with
DELETE /api/v1/statuses/:id, which sends Remove{Note}; Smithereen deletes the post then. The wall lists the persona's
public posts that start a thread and what was written on it.

Elsewhere: an account's Add{Note} on its own wall shows the post to its followers here as on that wall (privapub.wall on
the status), and its Remove takes it away. An Add or Remove naming a collection of the account's own server PrivaPub
does not know has its document read again first, at most hourly: accounts kept before walls were read had none.

Checked live: Smithereen 40 checks (G-0009 closed); GoToSocial and Mastodon unchanged (121).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

PrivaPub/Domain/Timelines/Fanout.cs

@@ -43,6 +43,14 @@ namespace PrivaPub.Domain.Timelines
 					if (!string.IsNullOrEmpty(post.AudienceURI))
 						foreach (var member in await _dbEntities.Followings.Match(f => f.TargetActorURI == post.AudienceURI && f.State == FollowState.Accepted).ExecuteAsync(token))
 							recipients.Add(member.AvatarId);
+					// a post on a wall (FEP-400e): its owner, when a persona, and those following the owner
+					if (!string.IsNullOrEmpty(post.WallOwnerURI))
+					{
+						if (await _dbEntities.Avatars.MatchID(post.WallOwnerAccountId).ExecuteAnyAsync(token))
+							recipients.Add(post.WallOwnerAccountId);
+						foreach (var follower in await _dbEntities.Followings.Match(f => f.TargetActorURI == post.WallOwnerURI && f.State == FollowState.Accepted).ExecuteAsync(token))
+							recipients.Add(follower.AvatarId);
+					}
 					// a public post (not a boost, not a reply) comes to those following one of its hashtags, as on Mastodon
 					if (post.Visibility == PostVisibility.Public && post.Tags.Count > 0 && string.IsNullOrEmpty(post.ReblogOfPostId)
 						&& string.IsNullOrEmpty(post.InReplyToURI) && string.IsNullOrEmpty(post.AnsweringToPostId))