Running the real companion found two faults no stub would have.

NotifyEvent.To is documented as "a user, or a repo:<name> topic", but quarry put that string in subscriberId. notify addresses the two through DIFFERENT fields, so an activity event did not fan out — it invented a subscriber literally named repo:synthetic and every watcher heard nothing. Verified against notify: the message existed, addressed to nobody real.

notify also refuses a topic key containing a colon (lowercase, digits, hyphen, underscore only) and rejects the whole trigger, so quarry's own convention could never have been a valid key. repoTopicKey translates at the boundary; quarry keeps its internal vocabulary. Names differing only in punctuation or case collapse to one key, which is documented rather than hashed away — an operator has to be able to read the key they subscribe someone to.

End to end on a real notify + dagnats: a wiki save reaches every member of repo-synthetic, an @mention reaches the person, and both render in quarry's inbox. check-in: 526e25a5d6 user: dmestas tags: trunk