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/Federation/Objects/NoteParser.cs

@@ -24,6 +24,8 @@ namespace PrivaPub.Federation.Objects
 		public string InReplyTo { get; init; }
 		public string Context { get; init; }
 		public string Audience { get; init; }
+		public string Wall { get; init; }//FEP-400e: the collection it says it was written in (`target`), a wall
+		public string WallOwner { get; init; }//that collection's attributedTo
 		public string QuoteUri { get; init; }
 		public string ReplyAuthorization { get; init; }//the parent author's ReplyAuthorization (approvedBy before GoToSocial 0.21)
 		public string QuoteAuthorization { get; init; }
@@ -89,6 +91,8 @@ namespace PrivaPub.Federation.Objects
 				InReplyTo = Id(note["inReplyTo"]),
 				Context = Id(note["context"]) ?? Value(note, "conversation"),
 				Audience = Id(note["audience"]),
+				Wall = note["target"] is JsonObject target && Value(target, "type") is "Collection" or "OrderedCollection" ? Id(target) : default,
+				WallOwner = note["target"] is JsonObject wallTarget ? Id(wallTarget["attributedTo"]) : default,
 				QuoteUri = Id(note["quote"]) ?? Value(note, "quoteUrl") ?? Value(note, "quoteUri") ?? Value(note, "_misskey_quote") ?? QuoteLink(note),
 				ReplyAuthorization = Id(note["replyAuthorization"]) ?? Id(note["approvedBy"]),
 				QuoteAuthorization = Id(note["quoteAuthorization"]),