- Add unregistered_senders table to capture dropped message origins (one row per sender, upserted with message_count and last_seen) - Add inbound DM logging to chat-sdk-bridge for debugging - Add vercel CLI to base container image - Install vercel-cli and frontend-engineer container skills - Default requiresTrigger to false in register step Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>