Let community stats combine player count and skill brackets

backend/app/routers/runs.py

@@ -1006,16 +1006,15 @@ def community_stats(request: Request, response: Response, bracket: str | None =
 
     `bracket` slices to a content bracket (`a10`, `wr30`, `wr50`, `wr75`);
     omit for all runs."""
-    if bracket is not None and bracket not in (
-        "solo",
-        "2p",
-        "3p",
-        "4p",
-        "a10",
-        "wr30",
-        "wr50",
-        "wr75",
-    ):
+    # Accept the player-count buckets, the skill tiers, and their player:skill
+    # composites (solo:wr50, ...) — the last let the page combine both axes.
+    _players = ("solo", "2p", "3p", "4p")
+    _skills = ("a10", "wr30", "wr50", "wr75")
+    _ok = bracket is None or bracket in _players or bracket in _skills
+    if not _ok and ":" in (bracket or ""):
+        _p, _, _s = bracket.partition(":")
+        _ok = _p in _players and _s in _skills
+    if not _ok:
         raise HTTPException(status_code=400, detail="bad bracket")
     # An empty shell during a post-deploy rebuild must not stick in the
     # edge cache for 5 minutes on top of the rebuild itself.

backend/app/services/community_stats.py

@@ -72,10 +72,19 @@ def _merge_starter(cid: str | None) -> str | None:
 
 
 COMMUNITY_VERSION = 1
-# Brackets the blob is accumulated per (matches encounter_stats): "all", the
-# exact player-count buckets (solo/2p/3p/4p), and the A10-gated win-rate ladder,
-# so the community datasets can re-slice by co-op size and by skill.
-_BLOB_BRACKETS = ["all", "solo", "2p", "3p", "4p", "a10", "wr30", "wr50", "wr75"]
+# Brackets the blob is accumulated per: "all", the exact player-count buckets
+# (solo/2p/3p/4p), the A10-gated win-rate ladder, AND their player x skill
+# composites (solo:wr50, ...) so the community page can combine co-op size and
+# skill at once (like the tier list). Keep the composite keys in sync with
+# _COMPOSITE_BRACKETS in run_entity_stats.py.
+_PLAYER_BRACKETS = ("solo", "2p", "3p", "4p")
+_SKILL_BRACKETS = ("a10", "wr30", "wr50", "wr75")
+_BLOB_BRACKETS = (
+    ["all"]
+    + list(_PLAYER_BRACKETS)
+    + list(_SKILL_BRACKETS)
+    + [f"{p}:{c}" for p in _PLAYER_BRACKETS for c in _SKILL_BRACKETS]
+)
 
 
 def _new_acc_one() -> dict[str, Any]:

backend/app/services/run_entity_stats.py

@@ -221,16 +221,23 @@ def _winrate_brackets(ascension: int, winrate: float | None) -> list[str]:
 # Score + Win% only). The full-Elo v12 build over 26 brackets x ~740k runs was
 # too heavy to finish, so the snapshot never advanced past v10; this cuts the
 # walk back to a healthy duration. The bump forces the (now cheap) rebuild.
-SNAPSHOT_VERSION = 13
+# Version 14: the community blob also carries the player x skill composites so
+# /community-stats can combine both axes (additive; the bump forces the rebuild).
+SNAPSHOT_VERSION = 14
 # The oldest snapshot version readers can still serve. Bump SNAPSHOT_VERSION
 # on every shape change; bump this floor ONLY when a change actually breaks
 # readers (a removed/retyped field). Everything in between is additive, and
 # serving a slightly-stale snapshot for the ~15 minutes a version-bump
 # rebuild takes beats serving nothing: to users an empty stats page is
 # indistinguishable from the site losing its data.
 SNAPSHOT_MIN_COMPAT = 3
-# Leader rebuilds the heavy walk at most this often.
-_SNAPSHOT_REBUILD_SECONDS = 10 * 60
+# Leader rebuilds the heavy walk at most this often. The walk reads every run
+# blob (~750k files, ~80 min on the current box), so a 10-minute interval had the
+# leader walking almost continuously — one worker pegged, a full run + file scan
+# back-to-back — which starved the DB and slowed the whole site. These stats
+# (tier list / community / Codex Score) don't need minute-fresh data, so rebuild
+# a few times a day instead; the walk now runs a fraction of the time.
+_SNAPSHOT_REBUILD_SECONDS = 2 * 60 * 60
 # Workers reload the snapshot from Mongo this often (cheap read).
 _SNAPSHOT_LOAD_SECONDS = 5 * 60
 
@@ -1017,14 +1024,20 @@ def _build_cache_data() -> tuple[dict, dict, dict, dict]:
         mp_blob_brackets = blob_brackets + [
             c for c in extra_brackets if c in ("solo", "2p", "3p", "4p")
         ]
+        # Community blob ALSO slices by the player x skill composites (solo:wr50,
+        # ...) so its page can combine both axes like the tier list. These only
+        # apply to A10 runs from qualifying players, so most runs add nothing.
+        community_blob_brackets = mp_blob_brackets + [
+            c for c in extra_brackets if c in _COMPOSITE_BRACKETS_SET
+        ]
 
         # Community / fun stats, accumulated from the same blob. Guarded so
         # one malformed blob can't abort the whole snapshot rebuild.
         try:
             community_stats.accumulate(
                 community_acc,
                 blob,
-                brackets=mp_blob_brackets,
+                brackets=community_blob_brackets,
                 run_hash=run_hash,
                 is_win=is_win,
                 character=character,

frontend/app/community-stats/page.tsx

@@ -110,7 +110,7 @@ function Empty({ jsonLd, current }: { jsonLd: object[]; current: string }) {
     <div className="max-w-5xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
       <JsonLd data={jsonLd} />
       <h1 className="text-3xl font-bold mb-2"><span className="text-[var(--accent-gold)]">Community Stats</span></h1>
-      <BracketFilter basePath="/community-stats" current={current} />
+      <BracketFilter basePath="/community-stats" current={current} composite />
       <p className="text-sm text-[var(--text-muted)]">
         No data for this bracket yet. Stats build from community-submitted runs, <Link href="/leaderboards/submit" className="text-[var(--accent-gold)] hover:underline">submit a run</Link> to seed them.
       </p>
@@ -161,7 +161,7 @@ export default async function CommunityStatsPage({
       </p>
 
       {/* Content bracket: slice every dataset below by skill. */}
-      <BracketFilter basePath="/community-stats" current={bracket} />
+      <BracketFilter basePath="/community-stats" current={bracket} composite />
 
       {/* Headline numbers */}
       <section className="mb-10">