Update the design doc §4.5 and CLAUDE.md current-focus: email joins cron+queue as a materialized stateful template via the shared-group-secret model; drop the email deferral and the stale "email rejected on a group" note; retarget "Next" to multi-node / multi-repo. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>