The tally: a booklet tab counting the love

A new tab in the help booklet answers "how much is this getting
played?" from the ledgers themselves: games chronicled (begun and
fought to a finish), distinct wizards seated, every spell, step, and
punch recorded, time at the table estimated by the clock between
moves (gaps over ten minutes don't count — async games tell the
truth), victories split by treasure-theft versus last standing, the
longest game, the fullest table, and the date the first game was
dealt. Computed server-side over the in-memory rooms with a 60-second
cache, fetched over the socket when the tab opens.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/server/src/rooms.ts

@@ -34,6 +34,7 @@ export interface Room {
   expansion: boolean;
   /** Lobby standee choices (colorIndex 0-5), by player. */
   colorChoices: Map<PlayerId, number>;
+  createdAt: string;
   state: GameState | null; // null until started
   log: LoggedCommand[];
   events: GameEvent[]; // full history (unredacted — redact per recipient)
@@ -84,6 +85,7 @@ export function createRoom(hostId: PlayerId): { room: Room; token: string } {
     seed: randomInt(0, 0xffffffff),
     expansion: false,
     colorChoices: new Map(),
+    createdAt: new Date().toISOString(),
     state: null,
     log: [],
     events: [],
@@ -360,6 +362,60 @@ export function claimTransferCode(code: string): { roomId: string; name: PlayerI
   return { roomId: t.roomId, name: t.name, token: t.token };
 }
 
+export interface EngagementStats {
+  gamesCreated: number;
+  gamesStarted: number;
+  gamesFinished: number;
+  wizardsSeated: number;
+  commandsPlayed: number;
+  /** Sum of command-to-command gaps under 10 minutes, in minutes. */
+  minutesAtTable: number;
+  winsByTreasure: number;
+  winsByLastStanding: number;
+  longestGameCommands: number;
+  fullestTable: number;
+  firstGameAt: string | null;
+}
+
+let statsCache: { at: number; stats: EngagementStats } | null = null;
+
+/** The tally of love the maze has received, computed over every room. */
+export function engagementStats(): EngagementStats {
+  const now = Date.now();
+  if (statsCache && now - statsCache.at < 60_000) return statsCache.stats;
+  const wizards = new Set<string>();
+  const stats: EngagementStats = {
+    gamesCreated: 0, gamesStarted: 0, gamesFinished: 0, wizardsSeated: 0,
+    commandsPlayed: 0, minutesAtTable: 0, winsByTreasure: 0, winsByLastStanding: 0,
+    longestGameCommands: 0, fullestTable: 0, firstGameAt: null,
+  };
+  const SESSION_GAP_MS = 10 * 60 * 1000;
+  for (const room of rooms.values()) {
+    stats.gamesCreated++;
+    for (const p of room.players) wizards.add(p.toLowerCase());
+    if (!stats.firstGameAt || room.createdAt < stats.firstGameAt) stats.firstGameAt = room.createdAt;
+    if (!room.state) continue;
+    stats.gamesStarted++;
+    stats.commandsPlayed += room.log.length;
+    stats.longestGameCommands = Math.max(stats.longestGameCommands, room.log.length);
+    stats.fullestTable = Math.max(stats.fullestTable, room.players.length);
+    let activeMs = 0;
+    for (let i = 1; i < room.log.length; i++) {
+      const gap = Date.parse(room.log[i]!.at) - Date.parse(room.log[i - 1]!.at);
+      if (gap > 0 && gap < SESSION_GAP_MS) activeMs += gap;
+    }
+    stats.minutesAtTable += Math.round(activeMs / 60_000);
+    if (room.state.phase === "finished") {
+      stats.gamesFinished++;
+      if (room.state.winReason === "treasures") stats.winsByTreasure++;
+      else if (room.state.winReason === "lastStanding") stats.winsByLastStanding++;
+    }
+  }
+  stats.wizardsSeated = wizards.size;
+  statsCache = { at: now, stats };
+  return stats;
+}
+
 /** Rebuild every persisted room by replaying its file. */
 export function loadPersistedRooms(): void {
   ensureDataDir();
@@ -377,6 +433,7 @@ export function loadPersistedRooms(): void {
         seed: meta.seed,
         expansion: false,
         colorChoices: new Map(),
+        createdAt: meta.createdAt,
         state: null,
         log: [],
         events: [],