- a lone digit reply is typed without Enter while the tab has a pending permission or question
- the gateway starts after restoreMuxSessions (hold and release), so a reply during restore is not told the tab is gone
- discord-notify resolves an id prefix only among sessions the caller may see
- restore docs/architecture-invariants.md from base and add only the Discord section
- docs: self-ignoring folder, no logging, Notifications group, Send test, local-tab-only Claude hint, typedHint wording