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+# PROCITY — Round 11 lane instructions (from Fable, integrator)
+
+Date: 2026-07-15 · **v2.0 is TAGGED AND SHIPPED** (`9b1c54e`, pushed with main). Round-10 review:
+D's span-normalize fix verified three independent ways (fresh-Chromium gate 24/24 figs human-sized,
+re-shot tour eyeballed, served-file check); F's stale-cache diagnosis of the 3.83 m re-measure was
+correct — I reproduced the same trap and proved it (browser cache held pre-fix rigs.js while the
+server served the fix). Clean round, both lanes.
+
+**Theme: AUDIO.** John has answered the standing question: **"generate freely."** v2.1 makes the
+town audible. A and D have the round off. B, E, F work; C answers one contract question.
+
+## House audio law (same spirit as the asset law)
+
+1. **The game runs silent-and-happy with zero audio assets** — missing/blocked audio must produce
+   silence, never errors. `?mute=1` forces it. The `?noassets=1` gate now also implies no audio fetches.
+2. **Autoplay policy**: nothing plays before the first user gesture (pointer-lock click is the
+   natural anchor). No console warnings on boot.
+3. **Deterministic flavour**: what a shop plays is seeded (citySeed + shopId), like everything else.
+4. **Budget**: total shipped audio ≤ 25 MB, lazy-loaded; no per-frame allocations in the audio path.
+5. **Free-first**: generate on MODELBEAST (local MusicGen / stable-audio-open / procedural synthesis
+   — E picks the tool and documents it in the pipeline README). Flag any paid need BEFORE spending;
+   default budget is $0.
+
+## Lane E — generate the audio pack (lead)
+
+Stand up `pipeline/gen_audio.py` (mirror the gen_skins.py pattern: promptable, seeded, `--dry-run`,
+harvest step, always eyeball — well, *ear*-ball — before shipping). Deliver `web/assets/audio/` +
+a manifest section (`audio: { ambience, sfx, music }` with files, loop points, gain hints).
+
+Pack v1 (keep it tight — ~25 files max):
+- **Ambience beds (loopable, 30–60 s)**: street-day (birds/traffic-distant/wind), street-night
+  (crickets, distant hum), rain layer (composes over either), interior room-tone (one per 2–3 shop
+  types is fine).
+- **Interaction SFX (short, dry)**: door open + shop doorbell, till/buy chime, record-bin riffle
+  (the dig), footstep set (2–3 surfaces × 4 variants), UI toast, tram bell + rumble (B's tram).
+- **Music beds**: 3–5 instrumental 90s-flavoured loops for shop interiors (record shop must play
+  music; milk bar radio vibe; video store synth hum). Parody-safe: instrumental originals only, no
+  real-song imitations of specific recordings.
+- Format: mono/stereo OGG (+ M4A fallback if trivial), 44.1 kHz, loudness-normalized (state LUFS).
+- Licence/provenance line per file in AUDIT.md (generated-local = fine, just say so).
+
+## Lane B — the WebAudio engine (street side)
+
+`web/js/world/audio.js` (B-owned): one AudioContext, unlocked on first gesture; layers with
+crossfades wired to systems that already exist — day-segment (street beds), weather (rain layer
+gain follows intensity), tram proximity, player footsteps from the movement code. Shop-door
+**spill**: standing near an open shop door leaks its interior bed at low gain (simple
+distance-gain, no HRTF needed for v2.1). Respect all house-law points; expose `setMasterGain`,
+`mute()`, and a tiny `window.PROCITY.audio` surface for F's smokes.
+
+## Lane C — one contract answer + optional hook
+
+Where should the interior bed + room-tone attach? Cleanest is C exposing `room.audio = { musicKey,
+toneKey }` (seeded per shop) on buildInterior's return so F's interior_mode just plays it. Confirm
+or propose better — one note in docs/LANES/. Optional: a `places`-tagged radio/hifi prop as the
+visual source in music-playing shops (v2.2 candidate if it doesn't fit the round).
+
+## Lane F — integration + smokes + v2.1
+
+1. Wire interior beds via C's contract into interior_mode (enter → fade in, exit → fade out,
+   dispose clean); street layer via B's audio.js.
+2. New smokes: boot-with-audio (no console errors, nothing plays pre-gesture), `?mute=1`,
+   `?noassets=1` (zero audio fetches), enter/exit leak check (AudioNodes released).
+3. Soak once with audio on; then tag **v2.1** and push (you own the tag this round — push it with
+   main; no hold needed unless something's ugly).
+4. Verification hygiene, now standing law: **verify in a fresh browser context** (the Playwright
+   gates already do) — a reused tab's module cache burned two of us this round.
+
+## Lanes A + D — rest day
+
+Nothing assigned. (D: F flagged that a visible outdoor night queue at the late shop is wanted for
+the night money shot someday — it's a v3 mechanic, parked in V2_IDEAS, no action now.)
+
+## For John
+
+- **v3 epoch pick** (audio round buys us time): ① editor/overrides · ② venue district + gig system
+  · ③ multiplayer presence. One word kicks off v3 planning next round.
+- Night-scene *visual* readability (streetlamp pools, window spill at distance) is a recurring
+  polish candidate — cheap to bundle into whichever v3 epoch you pick.