A community's comments reach its microblog members

A comment in a community was announced only as Announce{Create}, which
Akkoma, Mastodon and Misskey drop: their members never saw it (the village
found Akkoma's missing). A comment is now also announced as itself, as a
new post already was; Lemmy answers that form 400, harmlessly. Nothing is
decided by the follower's software.

The town's checker expects a followers-only quote to stay with the
followers, and G-0003 covers only Lemmy-hosted communities (their relayed
moderation), since relayed likes count.

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

docs/INTEROP.md

@@ -297,7 +297,8 @@ Firefish is dead (its site has answered 410 since February 2025).
 - **Visibility:** Misskey recognises followers-only by the author's own `followers` URL, matched exactly. Otherwise:
   - **A "specified" (direct) note with no resolvable recipients that Misskey fetches by URL is stored as public.**
     Circle objects must therefore never be served to an unauthorised fetcher. They aren't: 404.
-- **Groups:** vanilla Misskey drops `Announce{Create}`, so groups should `Announce` the Note itself. We send both.
+- **Groups:** vanilla Misskey drops `Announce{Create}`, so groups should `Announce` the Note itself. We send both, for
+  comments as for posts (Akkoma and Mastodon drop the activity form too; the town found Akkoma members missing them).
 - **Reactions:** must be `:name:` with no host, plus an Emoji tag, or they fall back to ❤.
 - **Article/Page titles** are never shown in Misskey's web UI.
 - **Iceshrimp.NET:**