The primary goal of ActivitySub is to create an cross-platform, agnostic ActivityPub client which gives a best-effort for consuming all ActivityPub content.
This is being discussed here: https://github.com/indirection-ctrl-a-ctrl-x/ActivitySub/issues/1
This is being discussed here: https://github.com/indirection-ctrl-a-ctrl-x/ActivitySub/issues/2
A test suite will be created and referenced against the ActivityPub standard: https://www.w3.org/TR/activitypub/