bengo, I checked out @steve 's activitypub-testsuite and it's very thoughtfully done. I recommend reading his docs https://github.com/steve-bate/activitypub-testsuite/tree/main/docs
Made a PR/issue of small things:
https://github.com/steve-bate/activitypub-testsuite/pull/4
https://github.com/steve-bate/activitypub-testsuite/issues/5
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