okay, I fixed two bugs and posts with attachments are still invisible to mastodont, so I'm redefining success as reduced bandwidth requirements. Mission accomplished.

If I've read the code in app/lib/activitypub/parser/media_attachment_parser.rb right, mastodon only supports a single string value for the url property. No arrays, no Link types. Curiously, this seems to prevent the entire activity from appearing, not just the image.

@trwnh you're my AP compliance officer contact.

@tedu that’s weird, i guess i can file a mastodon bug on your behalf if you provide me a sample payload

@tedu looking at https://honk.tedunangst.com/u/tedu/h/d21rx2s3jrsbNP2Nbc my only theoretical nitpicks are that it should be an Image attachment instead of a Document, and also maybe it would be nice if the `context` was something resolvable

that probably doesn’t solve this specific problem, but in the spirit of correctness i thought i’d mention those

@tedu oh, also arrays with single values should be coerced to just those values unless the property is defined as @/type: @/list or @/type: @/set

so the cc: [followers] should be just cc: followers

(yes, mastodon doesn’t comply with this in what it produces)