AP Mashup? How would you like disparate AP services to intermingle?

[how]

I guess the topic of this BoF is what @rhiaro mentioned in The ActivityPub Panel and I described elsewhere:

@how

Another example: it would be awesome to write a blog about a new song, attaching a video clip to it and have the client:

• extract audio from the video clip and upload to Funkwhale
• upload the video to peertube
• post the whole piece to WriteFreely (including the link to the video and audio files, as one URL each[1])
• extract the first paragraph including the video link and post a Note to Pleroma
• etc. ditto for other servers the user wants to use.