wiki.trwnh.com/content/app/compatibility.md

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Things you would need to do for compatibility

Mastodon

Unique username+domain pair

• webfinger domain.example for resource acct:preferredUsername@domain must link to your activitypub actor
  • mastodon will do this even when given a direct activitypub actor id
  • if webfinger is forwarded, mastodon will get the linked id and do the above

Representing polls

• Create Question instead of just Question or Create Note{attachment: Question} (being treated like an object instead of an activity)
• Votes are Create Note{name, inReplyTo: Note{attachment: Question}} and the replied-to note must be local