2018-09-15 UTC
# 
JasonRobinson[m] it's possible someone might not accept the activity unless they can "call back" and verify it - for example if they don't use http signatures. But for mastodon compat I guess it's fine. AP doesn't define these very well, but I think in general ID's are supposed to resolve (it's in spec). That is why fragment ID's are kinda ok because you can always wrap it in "Create" if the activity ID has the "#create" fragment. I think that is how mastodon