- A remote `summary` is a content warning only on a Note or Question, or when `sensitive` is set. On Articles,
Events, Videos, Pages and Audio it is an excerpt (WordPress teasers, Mobilizon dates and places, Mbin titles) and
is now kept as `Post.Excerpt` instead of hiding the post. `Post.ObjectType` records the remote type, and the
Mastodon API shows a remote non-Note object's title above its body again.
- Persona usernames must match `^[a-z0-9_]+$`, as groups already did; a name outside it was unreachable from
Mastodon and Misskey.
- `postingRestrictedToMods` is defined in our JSON-LD context (Iceshrimp.NET drops undefined terms).
- `Vary: Accept` on actor and object URLs.
- Owner decision: blocks federate. A block sends `Block`, an unblock `Undo{Block}`; checked live against GoToSocial.
- Owner decision: a persona's and a group's `published`, and the day in new ids, is a random day up to two weeks
before creation, so personas made the same day no longer share a date. Migration _007 gives existing ones theirs.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB
docs/INTEROP.md collects five research passes from 2026-10-01: Mastodon 4.7 and GoToSocial 0.22, the Misskey and
Pleroma families, the threadiverse (Lemmy 0.19/1.0, PieFed, Mbin, NodeBB), media and long-form (PeerTube, Loops,
Pixelfed, WordPress, Ghost, events, audio, books, Threads, Flipboard, Bridgy Fed), and cross-cutting FEPs and
signatures. Each claim was checked against source code or live fetches, with dates and versions.
It is checked against our own code: what is already right, three cheap things that are wrong today (summary read as a
CW on every type, unchecked usernames, an undefined context term), what the rich client needs kept (a post kind with
typed payloads, raw capture and provenance for the details view), and the six privacy choices the owner has to make.
The roadmap's P5 becomes P5 to P8, ordered by that evidence.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB
thepraandClaude Opus 5.5