diff --git a/docs/briefs/SOCIAL_RESET.md b/docs/briefs/SOCIAL_RESET.md
new file mode 100644
index 0000000..818a341
--- /dev/null
+++ b/docs/briefs/SOCIAL_RESET.md
@@ -0,0 +1,156 @@
+# BRIEF — Social & the Reset Ritual
+
+*The booth is shared; now make it feel inhabited. Three features: avatar
+customization, emotes, and a diegetic way to kill the mix and play the
+quest again — plus a who's-here list.*
+
+**For one Opus 4.8 session** (features are separable if split later, but the
+protocol changes should land as one coherent relay version).
+
+**READ FIRST — this is the law from the last phase:** on this shared tree
+you build against the *actual code*, not brief-guesses. Read
+`docs/CONTRACTS.md`, `docs/INTEGRATION_NOTES.md`, then the real files:
+`src/net/NetClient.ts` + `src/net/Avatars.ts` + `server/relay.mjs` (the
+protocol you're extending), `src/machines/quest.ts` + `src/machines/workshop/`
+(what reset must unwind), `src/ui/Menu.ts` (where customization lives),
+`src/audio/AudioEngine.ts` + `src/audio/sfx.ts` (how SFX are made),
+`src/fx/FxSystem.ts` (how the booth's mood follows quest state),
+`src/core/events.ts` (bus vocabulary — extend additively, primitives only).
+
+**You own:** `src/net/**`, `src/ui/**` (additive), `server/relay.mjs`,
+`src/machines/quest.ts` (+ small workshop reset hook), additive edits to
+`src/audio/**`, `src/fx/FxSystem.ts`, `src/core/events.ts`, `src/main.ts`
+wiring. Keep every edit additive; do not restructure working systems.
+
+---
+
+## Feature 1 — Avatar customization ("avatar your player")
+
+Players are already voxel DJs with headphones + name tags. Give them a look
+of their own. **Keep it palette-y and chunky — no free-form content, so
+there's nothing to moderate.**
+
+- **Options** (all enum/palette, no user-drawn anything):
+  - `bodyHue`: 12 swatches (hue ring; keep the current golden-ratio default
+    as "auto").
+  - `headgear`: `phones` (current), `cap` (brim box), `beanie`, `crown`
+    (win-flavored, tiny), `none`.
+  - `face`: 4 procedural canvas faces on the head front (dot eyes / shades /
+    visor / happy) — painted, not typed.
+- **Settings UI**: a third Menu tab `AVATAR` with swatch buttons and a live
+  preview (a small THREE scene in the panel is overkill — a 2D canvas
+  mock-up of the front view is fine and cheap). Persists in the existing
+  Settings localStorage object; **applies live** (no reload — see protocol).
+- **Protocol**: extend `hi` to `{ t:'hi', name, avatar }` where
+  `avatar = { hue: 0-11, gear: 0-4, face: 0-3 }` (integers only — server
+  validates ranges, defaults on garbage). Add `{ t:'avatar', avatar }` for
+  live changes; server stores per-peer and rebroadcasts; `hello.peers[]`
+  carries it. `Avatars.add/updateAvatar` renders it (rebuild that peer's
+  meshes; they're tiny).
+- Your own avatar isn't rendered (first person) — the preview is the mirror.
+
+## Feature 2 — Emotes
+
+No text chat (nothing to moderate, nothing to store). Expression through
+gesture + classic DJ noises.
+
+- **Four emotes** on `Z X C V` (pointer-locked only, no hotbar collision):
+  - `Z` **wave** — arm swing (procedural bone-less animation: swing a
+    grouped arm box; avatars currently have no arms — add two small arm
+    boxes to the avatar build, default hanging).
+  - `X` **head-nod** — the head bobs ON THE BEAT (subscribe to `audio:beat`
+    for phase; when the booth is silent, nod at 118 BPM anyway — funnier).
+    Toggles on/off; auto-off after 16 bars.
+  - `C` **point** — arm extends toward look direction 1.5 s.
+  - `V` **airhorn** — the classic. Synthesized (three detuned saws, pitch
+    droop), positional at the emoter, plus a confetti puff. **Rate-limited
+    client AND server side (1 per 4 s per peer)** or the booth becomes hell.
+- **Protocol**: `{ t:'emote', kind: 0-3 }`, relayed with peer id, server
+  rate-limits (drop, don't queue). Local emote plays immediately; remote
+  emotes animate that peer's avatar + positional sound.
+- A small HUD hint row in the help menu; also show `Z X C V` glyphs briefly
+  when another player emotes near you the first time.
+- **Self view**: first-person players can't see their own wave/point —
+  play the sound + a tiny camera nudge so it feels like something happened.
+
+## Feature 3 — The Reset Ritual ("blow the fuse")
+
+Once the mix is live, the quest is spent — groups need a way to play it
+again. Make un-breaking it diegetic and deliberate:
+
+- **The act**: the glass fuse in the PCB-Depths fuse box becomes breakable
+  again after a win. Mining it takes a **deliberate 5-second hold** (not
+  the usual glass 0.25 s — special-case this block position while the booth
+  is won) with a HUD warning during the hold: *"KEEP MINING TO KILL THE
+  MIX — everyone starts over"*.
+- **The consequence** (server-authoritative): client sends `{ t:'reset' }`
+  only when the hold completes. Server validates: booth actually won AND
+  ≥ 10 minutes since the last win (**anti-grief cooldown** — reject
+  silently otherwise, client shows "the fuse is still hot" subtitle).
+  On accept: server clears `repaired`, resets `platters` to stopped,
+  resets workshop state to **assembled-but-undone** (cart seated + rotated
+  correctly, all four wires POPPED OFF, screws at 0.5, weight at a random
+  notch 3–6 — the fun parts replay, the tedium doesn't), keeps ALL block
+  edits (player builds survive), persists, broadcasts
+  `{ t:'reset', by: name }`.
+- **Client side**: this needs the one genuinely new mechanism —
+  `Quest.reset()` and a bus event `'quest:reset': { by: string }`. Systems
+  react: stems → 0 (music dies mid-bar — make it a power-down pitch drop,
+  not a mute: `AudioEngine` brake-to-silence on all stems + light thunk),
+  platters spin down, HUD tracker unlights + big subtitle
+  *"⚡ DJ dusty42 BLEW THE FUSE"*, FxSystem drops emissive boost back to
+  0.35 over ~3 s (the booth visibly dies — this moment should feel HUGE),
+  power switch un-arms/un-glows, workshop applies its reset pose, and the
+  blown fuse block reappears in the box (worldgen block via
+  `world.setBlock` — it's the one edit the reset writes).
+- Late joiners: server state already carries everything; verify a joiner
+  post-reset sees a dead booth mid-second-run.
+
+## Feature 4 — Who's here (small)
+
+Hold **Tab**: a translucent list of DJ names in the booth (you first),
+with each name's avatar hue as a swatch. Data you already have
+(`hello.peers` + join/leave). Release to hide. Also show total count on
+the existing online chip (already done) — just verify it stays correct
+through avatar/emote traffic.
+
+---
+
+## Protocol & server discipline (ship-check will look here)
+
+- New/changed messages: `hi` (+avatar), `avatar`, `emote`, `reset`
+  (client→server intent; server→clients authoritative). Every field
+  validated: enums as bounded ints, unknown fields ignored, oversized
+  frames already capped at 2 KB — keep new payloads tiny.
+- Server-side rate limits: emote 1/4 s/peer; avatar changes 1/2 s/peer;
+  reset once per cooldown window globally.
+- `booth-state.json` gains `winAt` timestamp (for the cooldown) — must
+  load old state files without it (treat as cooldown-expired).
+- Old clients vs new relay: unknown incoming message types are already
+  ignored client-side — verify, don't assume.
+
+## Acceptance (live browser, two tabs minimum)
+
+- [ ] Avatar editor: change hue/gear/face in tab A → tab B sees it within
+      1 s, no reload; persists across reload; garbage from console → server
+      defaults it
+- [ ] All four emotes visible/audible cross-tab; airhorn spam is capped
+      (hold V — max 1 per 4 s lands remotely); nod syncs to the beat when
+      music plays
+- [ ] Full reset ritual: win the booth (debug handle ok) → fuse hold-break
+      → BOTH tabs see the booth die (music power-down, lights fade,
+      tracker clears, platters stop), workshop in its reset pose, blown
+      fuse back in the box; quest replayable to a second win; block edits
+      survived; cooldown rejects an immediate second reset with the
+      subtitle; joiner mid-second-run sees correct state
+- [ ] Tab list shows both DJs with hue swatches
+- [ ] `npm run typecheck` clean; zero console errors across a full
+      two-tab session; relay fuzz (bad enums, wrong types) all dropped
+- [ ] Update `docs/INTEGRATION_NOTES.md` (short section) + Menu help text
+      (emote keys, reset ritual hint in TIPS)
+
+## Out of scope
+
+Text chat (deliberately never), voice, friend lists, persistent accounts,
+avatar parts beyond the enums above, mobile input. Don't touch the deploy
+scripts — the integrator ships it.