Hey @b3n . The plugin already supports images and you can add more images by simply using the `activitypub_the_content` filer. This includes the complete Activity-JSON.
Mastodon is a bit tricky here, you can not add inline images, you have to add them as attachments.
See an example here: https://notiz.blog/2023/05/19/happy-birthday-fediverse/activitypub/
(to help me debug the output, I implemented a query, that outputs the JSON version of a post. To use it, simply add `/activitypub` at the end of a post-permalink).