lukasandClaude Opus 5
dee1983b84
message.new fires for imported history as well as new arrivals, and EventBus awaits hooks inline. As written, adding an account would have scored every message in its backfill — filing years-old inbox mail into Junk on the server, and adding ~70 ms of serialized HTTP per message to the backfill loop (twelve minutes on a 10k-message account). It is also when the filter is least able to judge, because Bayes has learned nothing yet. The envelope now carries account_state, and the hook returns unless it is "live". The backfill window belongs to the C2 learning bootstrap (§C.5), which reads that history as training data instead of acting on it. Tests pin the gating: backfilling accounts are not even read from the blob store, non-inbox folders are ignored, a live inbox arrival still classifies, and an unreachable engine still delivers. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018SqJYt7jD7oUEkoY68sBZo