Feature guides

Keys, anonymous identity, and the one-import integration loop.

Per-slot saves with last-write-wins or conflict-safe writes, plus a durable offline queue.

Boards, periods, keyed boards, tournaments, and promotion/relegation leagues.

Server-authoritative currency, stores, inventory, loot boxes, and energy — with one hardened grant path.

Friends, share/invite links, and teams (clans) with roles, invites, and requests.

A pre-visibility filter, reports, bans/mutes enforced at token issuance, and appeals.

Fail-closed age brackets, no DOB stored, verifiable parental consent, and per-feature gating.

WebSocket rooms with presence, broadcast, in-transit chat moderation, private rooms, and history.

Achievements, daily rewards with streaks, quests, battle passes, and an XP/level curve.

The single audited path that grants currency, items, and stat rewards — exactly once.

Structured per-player, shared, and team collections with OCC and atomic mutations.

Author, publish, play, and remix player content — with moderation and remix lineage.

Asynchronous multiplayer (chess, words, card games) over HTTP — no realtime connection needed.

Deterministic, server-seeded randomness so loot and crit rolls can't be client-forged.

Durable event ingest that rolls up into DAU/MAU, retention, funnels, sessions, economy health, and grouped crashes.

Change the live game with no client deploy — remote config, feature flags, player segments, live events, and promo codes.

llms.txt, an MCP server, self-fixing errors, and a one-command self-test — so an agent can integrate the backend itself.