Org and course Q&A plus cohort announcements, backed by the existing /community and
/course/:id/newsfeed routes. There is no direct messaging in ClassroomIO, so threaded Q&A is the
discussion surface — and offline it degrades to read-only with the compose box explicitly disabled.
The lesson says cracks are a fault but doesn't distinguish severity. On our older trucks there are surface marks that have been there for years. Do I tag out every time?