Implements queue message delivery in internal/mail/router.go: - Validates queue exists via expandQueue() - Creates single message (no fan-out unlike lists) - Stores in town-level beads with queue metadata label - Uses queue:name as assignee for inbox filtering 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>