AGENTS.md notes on the themes, plain CSS for container queries and
driving the app in Chrome; TODO.md gets the mobile app and rematch as
open work; the spec is marked implemented.
Backend README (GAME_CLOCK_MS), AGENTS.md notes, TODO items for the open points and the mobile release order; game-history R3.3 and R3.4 marked as replaced. Checked end to end in Chrome: moves, a backend restart, a timeout and the replay.
- Backend README: DATABASE_URL, VALKEY_URL, the new routes and how the
backend behaves when Postgres or Valkey is down
- TODO: drop the fixed spectator and memory bugs, add game history on
mobile, a page with all games, single-instance limits, backups and the
new .env variables
- Spec marked as implemented, all tasks ticked
