# LANE A — CITYGEN · progress (PROCITY-A)

*Status: **all deliverables landed; self-check all-green (14264/14264); rounds 2–14 closed** (see below).
v3.0 RELEASE round: 400-seed district invariant sweep landed + CITY_SPEC §v3 frozen at `v3.0`. Goldens
unchanged (synthetic `0x3fa36874`, gig `0x1f636349`) — no golden moved, no rng draw added this round.*
*Date: 2026-07-16 · owner: PROCITY-A (Opus 4.8)*

## Round 14 (2026-07-16) — v3.0 RELEASE: invariant sweep + CITY_SPEC §v3 freeze

Release round, Lane A scope = harden + freeze (no new systems). **No golden moved** (synthetic
`0x3fa36874`, gig `0x1f636349` both re-verified frozen); the only code touched is `selfcheck.js`
(test-only), so no seeded stream gained a draw — the release-round law holds.

Delivered:
1. **400-seed district invariant sweep** (`selfcheck.js`, ALL GREEN **14264/14264** in ~0.7s). Factored
   the district checks out of `gigSuite` into `districtInvariants(plan,label)` (behaviour-preserving — the
   4 hero-seed gigSuite runs are byte-identical), then swept **seeds 1–400 + the large edge seeds**
   asserting the whole contract each: 2–4 venues, ≥1 pub, never the openLate shop, no band twice per night
   town-wide, per-venue 4–6 nights, every poster off the carriageway. Added a distribution assert that the
   seeded count **spans {2,3,4}** across 400 seeds (146/121/133) — proves the range is exercised, not pinned.
   `structuralSuite` still runs on the 6 hero SEEDS + osm parity (unchanged); the sweep runs the light
   district checks only, so 400 gig-on generations stay ~0.5s.
2. **osm graceful placement** in the sweep: `katoomba` (19 shops, **no warehouse district**) still lands
   2–4 valid venues incl. a pub for every hero seed — proving `pickVenues`' off-spine fallback. Honest
   scope noted: both osm fixtures keep a main spine, so this proves the no-warehouse branch (not no-spine).
3. **Poster-check hardening**: kept the `roadWidth/2` nearest-edge formulation (a literal `poleOffset`
   compare would false-fail corner posters); added a `−1e-6` epsilon on the strict `<` to immunise the
   exact kerb-line boundary against r2 rounding (only reachable on a no-main-spine fallback; not hit today).
4. **CITY_SPEC §v3 frozen at `v3.0`** — §v2-style FROZEN marker, final wording pass over venues table,
   genre map, gigKey contract, corridor law, gig golden. Genres final (pubrock/grunge/covers, Fable's ruling).

Coordination: the R12 single-venue **alias line stays in §v3 for F to delete atomically** with the
`gig_state.js` getters (debt #1) — deleting it now would be doc-ahead-of-code (alias still live) and would
race F on the same lines; the freeze marker carves it out explicitly. Flagged to F that the runtime block
omits `nightOf(id)`, and to B that `venue.js:228` is a second bare-string edit site. **Not touched:**
`web/assets/manifest.json` shows a concurrent Lane E `glb_law` edit in the shared tree — left for E.

## Round 13 (2026-07-15) — v3.0-beta THE DISTRICT: 2–4 venues + the week + town-wide posters + verge fix

Lane A ran **first** again (C/D/B/F all hang off the district `plan.gigs`). Same flag, same prime-flag
law: **flags-off byte-identical — all v2 goldens frozen** (synthetic `0x3fa36874`, osm unchanged).
Self-check **ALL GREEN 3273/3273**; `scaffold_check` + `consistency` GREEN. The gig **entry shapes are
unchanged** — the alpha's one-venue readers now iterate 2–4. Interfaces published in `LANE_A_NOTES.md`
(§Round 13) and `CITY_SPEC.md` (§v3.0-beta) in this same commit.

Delivered (all behind `?gigs=1`):
1. **2–4 venues, three kinds** — `pickVenues` converts a seeded 2–4 plain shops in place: `pub` (spine
   end), `band_room` (warehouse fringe), `rsl` (off-spine), 4th = a 2nd pub at the far end. Each carries
   `venueKind` + `genreKey` (`pubrock`/`grunge`/`covers`). Registry gains weight-0 `band_room`+`rsl` types
   (facades, hours, footprints). Placement degrades gracefully so osm towns still get venues. Never the
   openLate landmark; venues occupy distinct lots.
2. **The gigKey contract (debt #1)** — `gigKeyFor(genreKey) => 'gig-'+genreKey`, the single exported
   genre→bed mapping (no table anywhere). C/E/B/F all route through it; F deletes the `GIG_BED` bridge.
3. **`plan.gigs` goes district** — 7 nights × every venue, each playing a seeded **4–6** (dark the rest,
   reads true). `gigId` unique town-wide; cover skewed by kind (pub 50%/`$2–10`, RSL 45%/`$2–5`, band_room
   70%/`$2–6`). **No band plays two venues on one night**; custom names spread night-major across the week.
4. **`plan.posters` goes town-wide** — tonight's playing venues each get a frontage poster + a seeded spine
   run (2/main edge, either verge). Different venues share pole runs — the district reading.
5. **Verge offset (debt #5 PAID)** — the R12 bug (spine posters at `node.x+2` = mid-bitumen on a 28 m
   corridor) is fixed by the new corridor law: `roadWidth`/`vergeBand`/`poleOffset(edge)` in registry.js,
   re-exported from the barrel — the road-vs-verge split of `edge.width`, published as **functions** (no
   plan fields ⇒ base goldens frozen). Selfcheck now asserts no poster stands on a carriageway.
6. **Registry `pub.interior` corrected** `'band_room'`→`'pub'` (was an unread field; now avoids a
   name-collision with the new `band_room` venue type — C keys recipes off `shop.type`, not this field).

Golden re-pin: gig golden `0xa6ae5a5e`→**`0x1f636349`** (multi-venue changed gig-plan output; re-pinned
in-commit per CITY_SPEC amendment law). New selfcheck coverage: 2–4 venues + known kinds + `type≡venueKind`
+ genre map + gigKey ≡ `gig-`+genreKey; 4–6 gigs/venue, ≤1 gig/night/venue, no same-night band clash
town-wide; posters advertise night-0 and **clear every carriageway**. Sample seed 20261990 → 3 venues:
The Exchange Hotel (pub), Wangaratta RSL, The Vinyl Shed (band room, dark tonight); 14 gigs across the week.

**Handshake note for Lane C:** `RECIPES.band_room`/`RECIPES.rsl` don't exist in `theme.js` yet — until C
adds them those venues fall back to the op-shop interior. That's the order (A→C). **Not run by A:** the
browser flags/scale gates + depot (Gate 3, John-blocked) — F's end-of-round acceptance, and they'd test
R12 runtime that hasn't adapted to the new venue count yet.

## Round 12 (2026-07-15) — v3.0-alpha GIG LAYER (`?gigs=1`): venue + gigs + band names + closing-time debt

Lane A ran **first** this round (the whole round hangs off the `plan.gigs` handshake). Everything is
behind `?gigs=1` (prime flag law): **flags-off is byte-identical — all v2 goldens frozen** (synthetic
`0x3fa36874`, osm melbourne `0x34cfdec0`, katoomba `0x0f652510`). Self-check **ALL GREEN 3074/3074**
(+ the whole gig suite ×2 sources), `qa.sh --strict` GREEN (6/6). Verified in-browser both modes.

**Architecture — a post-hoc augmentation layer, not a generator change.** `web/js/citygen/gigs.js`
`withGigs(plan, seed, opts)` takes a finished plan and adds the venue + gigs + posters; the selector
(`index.js generatePlanFor`) applies it **only** when `opts.gigs`. So `generatePlan` is untouched
(goldens can't move) and the layer is source-agnostic (synthetic + osm both get gigs).

Delivered (all behind the flag):
1. **Venue** — one `pub` per town: a spine-END plain shop converted in place to `type:'pub'` (keeps lot
   id/geometry ⇒ enterable, no overlap), `shop.venue=true`, hours `[17,23]`. **Never** the openLate shop.
   Registry gains a weight-0 `pub` type (facades `djsim-pub`+`federation`, `interior:'band_room'` for
   Lane C, fittings). Weight-0 ⇒ never auto-placed ⇒ base plan unchanged.
2. **`plan.gigs`** — 7 nightly entries `{gigId, venueShopId, bandName, genreKey:'pubrock', night, startSeg:5,
   endSeg:5, cover}`; `cover` seeded ~half free / half `$2–$10`. F picks tonight's + charges at the door.
3. **Band names** — `bandName(seed)` generator (90s Aussie pub-rock wordlists) **+ the drop-in**
   `web/assets/custom_bands.json` (`{bands:[…]}`, ships with 10 examples incl. "The Feral Galahs"):
   present → priority into the pool (up to 7 surface); absent → pure generator, zero fetch (`?noassets`).
   Deterministic given (seed, file). The shell (F) does the async load and passes `customBands` in.
4. **`plan.posters`** — ~6 seeded poster placements `{id, gigId, x, z, ry}` (venue + spine) for Lane B.
5. **Closing-time debt PAID** — `isOpen(shopOrHours, hour)` exported from the barrel: the canonical
   half-open law (`open ≤ h < close`) as code, for D's gig-night patronage surge (was prose in round 9).
6. **Debug map** — `map.html?gigs=1` shows the venue ring + "♪ PUB" label, poster pins, and a panel gig
   line ("♪ The Thornbury Hotel · tonight: Screaming Utes · $10 cover · 7 nights · 6 posters"). Loads the
   band drop-in for the view. Flags-off map is unchanged (adds a benign `pub (0)` legend row).

New self-check coverage: `gigSuite` runs the full structural suite (venue-aware — the pub is exempt
from the single-late-shop rule via `!sh.venue`, a no-op on base plans) + gig invariants (one pub, gig
schema, cover ∈ {0}∪[2,10], band names resolved, posters ref real gigs), on synthetic + both osm towns;
a `?gigs`-off≡base byte-identity check per seed; a custom-band priority + determinism check; and a
**gig golden `0xa6ae5a5e`**. CITY_SPEC gained a "CityPlan v3 — gig layer" section; handshake interfaces
for C/D/B/F are in `LANE_A_NOTES.md`. Sample seed 20261990 → venue "The Thornbury Hotel" (a converted
spine-end pawn shop), openLate video preserved.

## Round 9 (2026-07-15) — freeze the v2 contract + closing-time ruling (ship round)

Small round; the most "done" lane makes it official.

1. **CITY_SPEC v2 contract FROZEN** — added a "CityPlan v2 — frozen producer contract" section: the
   producer API (`generatePlanFor`/`generatePlan`/`generatePlanOSM`/`osmTownKeys`/`chunkIndex`), the
   goldens table (synthetic `0x3fa36874`, osm/melbourne `0x34cfdec0`, osm/katoomba `0x0f652510`, keyed
   (seed,plansrc,town)), the town-key mechanism, osm normalization rules, and the
   hours/openLate/storeys laws — all matching code as shipped (F diffs claims vs code in review).
   Refreshed the stale round-6 "Plan sources" blockquote to the multi-town reality. Layer-1 changes now
   require a CITY_SPEC amendment + golden re-pin in the same commit.
2. **Recipe sanity — dry-ran end-to-end** (not just eyeballed): appended a throwaway Newtown (42 shops)
   to `OSM_TOWNS`, ran selfcheck → the full parity suite auto-covered it (1931/1932, only the golden
   unpinned) and printed a ready-to-paste `newtown: 0x9045e577,` line. Reverted; no 3rd town shipped
   (didn't fall out free). Improved selfcheck to print that `⚠ UNPINNED — add to OSM_GOLDENS` line so
   the recipe is genuinely mechanical; fixed the recipe wording to match.
3. **Closing-time occupant ruling** (D's on-call question) — ratifies what D's `sim.js` already does and
   freezes it: half-open hours, no new entry when closed, **occupants drain (finish their bounded
   dwell) — never popped**, player not force-ejected, openLate video is the night destination. In
   CITY_SPEC (contract law) + `LANE_A_NOTES.md` (for D). No code change asked of D.

Self-check **ALL GREEN 1727/1727**; `qa.sh --strict` GREEN. Only doc + one selfcheck log-line touched;
no generator change ⇒ all three goldens unchanged.

## Round 8 (2026-07-15) — OSM to parity + a second town (carried R7 brief, FULLY LANDED)

## Round 8 (2026-07-15) — OSM to parity + a second town (carried R7 brief, FULLY LANDED)

The carried brief (slipped R7) is done — all four items, not a partial.

1. **Selfcheck parity**: extracted the full invariant suite into `structuralSuite(plan, label)` and
   run it on **every (source, town)** — synthetic + both OSM towns now get identical coverage
   (storeys, one-shop-per-lot, solid-use, facing, within/cross-block overlap, corridor coverage,
   determinism, exactly-one-openLate). **ALL GREEN 1727/1727** (was 1362 — OSM went from a subset to
   the full suite ×2 towns).
2. **Second town**: **Katoomba** (Blue Mountains, 19 shops, op-shop/book heavy) — a small-regional
   contrast to inner-Melbourne (95, book heavy). `?plansrc=osm&town=katoomba`. `osm_fixture.js` is now
   `OSM_TOWNS { melbourne, katoomba }` + `DEFAULT_TOWN`; `generatePlanFor(seed, source, { town })`.
   Golden pinned `0x0f652510`. **Melbourne golden `0x34cfdec0` and synthetic `0x3fa36874` unchanged.**
3. **"Add a town" recipe** documented in `LANE_A_NOTES.md` (R8) — extraction → `OSM_TOWNS` entry →
   pin golden → tell F. Mechanical.
4. **Normalization + logging**: importer normalizes real data to the contracts (unknown kind→opshop,
   hours clamp so only one shop is openLate, video-preferred landmark w/ fallback) and **logs** what it
   changed via `{ report }` — selfcheck prints e.g. `melbourne: 95 shops · normalized {typesRemapped:0,
   hoursClamped:5, openLate:video}`. The contract never bends; the data does.

Extraction one-liner (Katoomba, reusable — see recipe): cell 0.05 around (-33.714, 150.312), same
KIND map + dedupe + sort-by-id as Melbourne (cell 0.06 around -37.803, 144.967). Screenshots:
`docs/shots/laneA/osm-{melbourne,katoomba}.png`. `qa.sh --strict` GREEN.

## Round 6 (2026-07-14) — the second plan source (`?plansrc=osm`), FULLY LANDED

The carried-over OSM plan-source seam (no-showed rounds 4–5) is **done** — not the escape-hatch
partial, the whole thing, invariants green. A second CityPlan producer behind the same contract, so
Lanes B–F consume it unchanged.

- **`osm_fixture.js`** — 95 REAL inner-Melbourne secondhand/charity/music/book/toy/antique shops
  (book 36, toy 14, opshop 13, record 12, video 11, pawn 9), extracted deterministically from
  thriftgod's `city_source.json` Overpass cache. Checked in, imported as a module → **zero network**.
- **`plan_osm.js`** — `generatePlanOSM(seed)`: projects real lat/lon → metres, bins shops into
  latitude-band avenues off a spine (real row + real east–west order preserved), marches them into
  a valid, non-overlapping CityPlan, centres on origin, reports its true 362×486 bbox. Real shop
  names kept ("Central Catholic Bookshop"). Exactly-one-openLate-video rule matches synthetic.
- **`index.js`** — `generatePlanFor(seed, source)` selector; default `'synthetic'` is byte-identical
  (golden `0x3fa36874` untouched). `generatePlanOSM` exported for F.
- **`selfcheck.js`** — parameterized by source: OSM runs the full structural invariant suite
  (frontEdge/facing/no-overlap/chunk-coverage/finite/JSON/determinism/openLate) + its own golden
  **`0x34cfdec0`**; synthetic-only brief checks (market/arcade/dept/milkbar) deliberately skipped.
- **`map.html`** — `?plansrc=osm` renders it; screenshot `docs/shots/laneA/osm-melbourne.png`.
- Seam + goldens + shape-differences documented for F's determinism gate in `LANE_A_NOTES.md` (R6).

**Verified**: 95/95 shops placed, 0 bad frontEdges / 0 overlaps / 0 backwards / full chunk coverage,
deterministic, synthetic path byte-identical. Self-check **ALL GREEN 1362/1362**; `qa.sh --strict` GREEN.
Honest cut (documented): street geometry is regularized (real row+order drive it, exact projected
metres do not) and shop-name parody is deferred.

## Round 4 (2026-07-14) — v1-tag round: 2 confirmations, 1 hardening fix

**A1 — storeys checker (post-F2): CONFIRMED.** `tools/qa/consistency_check.mjs` `permittedMax` scoping
(Lane F's F2, matching my R3 spec) gives **0 storeys warnings** across 7 seeds; `qa.sh --strict` GREEN
(4/4). False-negative test: injected a real `video@2` into a scratch copy of the checker's input →
caught on every seed. No benign-anchor false positives, no real-drift false negatives.

**A2 — openLate contract: AUDITED + HARDENED.** F's night gate `hours[1] >= 22` was matching 4–15
shops/seed (regular videos jittered from base-21 to 22), not the single landmark it assumes. Fixed in
plan.js so `hours[1] >= 22` ⟺ `openLate` (exactly one, always the video rental): regular shops close
by 21:00; only the deterministically-chosen video landmark reaches ≥22 (`LATE_HOUR`). This also makes
the generator finally match what `web/index.html:159-161` and `soak.py:68` already assumed
("at night only the openLate shop is open"). Added selfcheck assertions; verified across 15 seeds.

**⚠ GOLDEN.hash: `0x098eec2b` → `0x3fa36874`** — intended output change from the A2 fix (not drift;
F2 is tooling-only and didn't touch generation). Same lots/shops/types/names/skins; only a few videos'
close hour moved 22→21. Details for Fable in `LANE_A_NOTES.md` (round 4).

**Self-check:** `✓ ALL GREEN — 1301/1301` (was 1283; +18 are the new openLate exactly-one / field⟺threshold
/ is-video assertions). Seed 20261990 → "Boolarra Heads": 681 lots, 493 shops, unchanged.

> **⚠ Fable — commit-label mixup (no action needed on the code):** my round-2 changes are committed
> and correct, but a shared-working-tree race landed them under Lane C's message —
> commit **`4235060` "Lane C: keeper stand pose…" actually contains only my 5 Lane A files** (a
> concurrent `git commit` grabbed my staged index between my `add` and my `commit`). Lane C's real
> keeper-pose changes are still uncommitted & intact. Nothing is pushed, so relabel at your leisure
> when the tree is quiet (`git commit --amend`). Systemic: lanes should commit atomically with
> `git commit -- <paths> -m …` to avoid this. Self-check green 1283/1283; content is safe.

## TL;DR

`generatePlan(citySeed) → CityPlan` is done: a deterministic, JSON-serializable, <1ms pure-data
town generator matching CITY_SPEC schema v1, plus `chunkIndex`, the shared shop-type registry, a
seeded 90s-AU name generator, a Canvas-2D map debugger, and a node self-check that asserts the
whole acceptance contract. `node web/js/citygen/selfcheck.js` prints **ALL GREEN (1082/1082)**.
Five seeds render as recognisable towns (screenshots in `docs/shots/laneA/`).

## Deliverables (all present)

| # | file | what |
|---|---|---|
| 1 | [web/js/citygen/plan.js](../web/js/citygen/plan.js) | `generatePlan(citySeed)`, `chunkIndex(plan)`, `CHUNK`, `chunkKey` |
| 2 | [web/js/citygen/names.js](../web/js/citygen/names.js) + [wordlists.js](../web/js/citygen/wordlists.js) | seeded shop+town names, 50+ patterns, short signboard forms |
| 3 | [web/js/core/registry.js](../web/js/core/registry.js) | `SHOP_TYPES` (all 9), district weights, enums, pure helpers |
| 4 | [web/map.html](../web/map.html) | standalone Canvas-2D plan viewer (pan/zoom/hover, layer toggles, seed box, regen, export JSON, chunk grid) |
| 5 | [web/js/citygen/selfcheck.js](../web/js/citygen/selfcheck.js) | `node web/js/citygen/selfcheck.js` — full acceptance harness |
| + | [web/package.json](../web/package.json) | `{"type":"module"}` so `node` runs the self-check as ESM (see *Treaty notes*) |
| + | `docs/shots/laneA/seed-*.png` | 5 seeds screenshotted (20261990, 1, 42, 777, 8675309) |

## What the generator produces (matches the CITY_SPEC design brief)

- **Main-street spine** — 7 stations S→N through the origin, x-jitter ±30m, 28m corridor, `kind:'main'`.
  Continuous narrow-frontage (6–9m) retail both sides.
- **Cross streets** at 4 stations; the two central ones are wider "second high streets", the outer
  two are grittier `backstreets`. All `kind:'side'`, ±8° jitter.
- **Market square** west of the origin — a tidy 5×8 grid of `stall` lots + the `dept` anchor
  fronting the spine.
- **Arcade** — a `kind:'arcade'` (width 5) pedestrian lane cutting east through a mid-spine block,
  lined both sides with tiny 3–5m record-heavy shops.
- **Warehouse fringe** — sparse big lots beyond one spine end (N or S, seeded), mostly `infill`
  with the odd pawn shop.
- **Residential collar** — a loose ring road of `house` lots with **2–4 corner milk bars** embedded.
- **Laneways** (`kind:'lane'`) behind the central blocks, with `yard` lots for back-door flavour.

Sample (seed 20261990 → "Boolarra Heads"): 27 nodes, 22 edges, 35 blocks, 711 lots, 523 shops, 152 chunks.

## Self-check coverage (`node web/js/citygen/selfcheck.js`)

Determinism (two runs byte-identical) · <100ms (actually <1ms) · every edge→real nodes · every block→real
district · every lot→real block + **valid frontEdge** + positive size · every shop→real lot + known type +
**facade skin exists on disk** + sane hours + named · one-shop-per-lot · **no overlapping lots within a
block** (rotated-rect OBB / SAT test) · **chunkIndex covers every lot** & buckets reference real ids ·
JSON round-trip lossless · design-brief presence (spine, arcade, market, stalls, dept anchor, 2–4 milkbars) ·
all registry + used facades exist in `web/assets/gen/`. Run over 6 seeds → **1082/1082**.

## House-law compliance

- **Zero `Math.random` and zero THREE imports in `js/citygen/*` and `registry.js`** (grep-clean).
  All randomness flows through `web/js/core/prng.js`. (map.html uses `Math.random` only to pick a
  *random seed to view* — the generation it then runs is fully seeded; the map is pure Canvas 2D,
  no THREE.)
- JSON-serializable, deterministic, <100ms — verified.
- Registry is flat data every lane imports; facade pools are real files in `web/assets/gen/`.

## Treaty / cross-lane notes for Fable

1. **`web/package.json` added.** Needed so `node web/js/citygen/selfcheck.js` runs the ES modules
   (browsers use `<script type=module>`; node needs `"type":"module"`). It's additive infra —
   python `http.server` and browsers ignore it, no deps, no build. Not in the ownership table;
   flagging for your blessing. Other lanes can now node-test their pure modules too.
2. **Schema extensions (non-breaking).** Added `kind` to each `block` (its district-kind string,
   alongside the spec's `district` **id**) so the map & Lane B can theme a block without a district
   lookup. `block.district` is the **district id**; `districts[id].kind` is the kind. Everything
   else matches schema v1 exactly.
3. **`ry` convention (Lane B please read):** a lot's `ry` is the Y-rotation so a GLB modelled
   facing **−Z** ends up with its facade's outward normal pointing at its `frontEdge` street.
   Derivation + a worked example are in `plan.js` (`marchStrip`). `frontEdge` is a valid edge id
   for every lot (stalls/dept front the nearest spine edge).
4. **`pipeline/gen_names.py` intentionally NOT shipped.** The Lane A brief offered an *optional*
   Ollama word-expansion script, but `pipeline/*` is **Lane E's** owned dir per the CITY_SPEC
   ownership table. Wordlists are hand-authored and checked in; runtime does zero network calls.
   If you want the Ollama expansion, it should live in Lane E's pipeline or be re-assigned.

## How to eyeball it

```
cd web && python3 -m http.server 8130
# http://localhost:8130/map.html            (default seed)
# http://localhost:8130/map.html?seed=42    (any uint32 seed; ?seed= drives the screenshot harness)
node web/js/citygen/selfcheck.js             # acceptance harness, prints ALL GREEN
```

## Open questions for Fable

- Retail density: a core seed yields ~500 shops (continuous frontage, as briefed). Happy with that,
  or dial down for Lane B's draw-call budget? (It's one constant per band; trivial to tune.)
- Want the residential collar to be a true closed ring vs the current 4-edge loop? (Current reads
  fine on the map; a fuller street graph is a later enhancement.)

## Adversarial review + fixes (round 1)

Ran a 6-dimension multi-agent review of the whole lane (27 agents: determinism · schema/spec ·
geometry · chunk/JSON/perf · cross-lane contract · code quality), each finding independently
verified by a skeptic agent that ran the real generator to confirm or refute. **21 findings raised,
15 confirmed real, 6 refuted.** All confirmed defects are now **fixed and re-verified**; the
self-check grew new assertions so none of these classes can regress silently.

| # | defect (confirmed) | sev | fix |
|---|---|---|---|
| D1 | market stalls + dept anchor faced **backwards** (`ryEast` sign inverted → facades pointed west, away from the spine they front) | HIGH | `ryEast = atan2(-1,0)`; self-check now asserts every lot faces its `frontEdge` |
| D2 | **cross-block lot overlaps** at spine×cross-street corners (≈45 building-lot pairs/seed, ≤8.7m) — self-check only tested *within* a block | HIGH | reserve corner (rung near-spine inset 14→34m) + a deterministic overlap-resolution pass (demote later lot to `infill`); self-check now runs **global** cross-block OBB/SAT over building lots |
| D3 | `chunkIndex` **skipped chunks** (32m point-sampling on a 64m grid); the origin chunk under the spine was omitted; road width ignored | HIGH | Amanatides–Woo grid supercover + kerb rails (centreline ± half-width); self-check now asserts edge coverage vs a dense supercover |
| D4 | market stalls' `frontEdge` pointed at the wrong spine segment (z-band mismatch, up to 122m off) | MED | stalls → `spineEdges[2]`, dept → `spineEdges[3]` |
| D5 | name generator emitted **doubled possessives** (`Macca’s’s`) — `{First}*’s` fired both the `*` and the literal `’s` | HIGH | dropped the redundant `*`; simplified `fill()`; self-check rejects unresolved tokens |
| D6 | map.html drew the main road with `var(--roadmain)`, which canvas can't parse → the spine rendered near-invisible | MED | pass the bare custom-property name to `getcss()` (now a proper brown spine) |
| D7 | registry facades/fittings drifted from the CITY_SPEC table | LOW | **amended CITY_SPEC's shop-types table** (in this commit, flagged) to match the registry lanes import |
| + | `_sbl` Map cache was memoized onto the plan → polluted exported JSON with `"_sbl":{}` | LOW | moved the cache to a module-level var, reset per regen |
| + | `cornerBoost` could push single-storey types (video/milkbar) above their registry max | LOW | gated to types with registry max ≥ 2 |
| + | no golden-fingerprint / cross-revision drift guard; lot coords never checked finite | — | added a committed golden hash for seed 20261990 + finiteness assertions |
| + | undocumented `block.kind` / `block.district`-is-id; dead stall guard | — | documented the schema in CITY_SPEC; removed dead code |

**Refuted (6)** — investigated and dismissed with reasons, e.g. "the determinism test is a
tautology" (true that it only catches in-process nondeterminism — so I *added* the golden fingerprint
for real drift detection) and "`package.json` isn't in the ownership table" (correct, but it's
required infra — now added to the table).

**Post-fix self-check:** `✓ ALL GREEN — 1271/1271` (was 1082; +189 checks are the new
facing/cross-block-overlap/edge-coverage/finiteness/fingerprint assertions). Seed 20261990 →
"Boolarra Heads": 27 nodes, 22 edges, 35 blocks, 681 lots, 493 shops, 174 chunks. All 5 seed
screenshots re-captured. Golden fingerprint `0xb5d5cc13`.

## Round 2 — cross-lane integration responses (2026-07-14)

Picked the lane back up after B–F integrated against it. Worked through the notes those lanes left
for Lane A (`docs/LANES/LANE_F_NOTES.md §8/§3.5/§7`, `B-progress.md`, `E-progress.md`) and closed
every request that lands in my files. **Self-check green at 1283/1283; golden fingerprint refreshed
`0xb5d5cc13` → `0x098eec2b`; map.html re-verified in-browser (renders a town, chunk-grid overlay
works, zero console errors).** No screenshot refresh needed — the changes don't alter the plan's 2D
appearance (the map colours by type/use, not by facade or hours).

| # | request (who asked) | what I changed | files |
|---|---|---|---|
| R1 | **"Which field marks the open-late shop, and what's the `hours` encoding?"** (Lane F §8); "exactly one late-night shop per town" (F §3.5) | The old `sr()<0.06` per-shop dice yielded **0…many** late shops and — because its formula was `max(close,19)+0..2` — usually **none past 22:00**, so F's `hours[1]>=22` gate was flaky/false. Replaced it with **exactly one deterministic `openLate:true` landmark** per town, chosen after de-confliction from a naturally-late type (video/milk bar, never a stall), closing **22:00 or 23:00**. Encoding documented: `hours=[open,close]`, 24h ints, `0≤open<close≤23`. | `plan.js`, `CITY_SPEC.md` |
| R2 | **Skin-name double-prefix trap** — registry stores full filenames, `skins.js` expected bare keys → `facade-facade-…jpg.jpg` 404s (Lane F §7); **"pick one and say so"** on field types (Lane B) | Added a **Field-type contract** to CITY_SPEC: all ids + id-refs are **integers**; `facadeSkin`/registry `facades` entries are **full filenames** under `web/assets/gen/`, loaded verbatim (extended to E's ground/awning/sky/wall/interior skins). Lane A is the source of truth; consumer fixtures conform to it. | `CITY_SPEC.md` |
| R3 | **`chunkIndex` furniture-drop** — verge props at a perpendicular offset bucketed into a chunk that omitted their edge (Lane B) | Rewrote edge bucketing from a 3-rail supercover to a **gap-free corridor rasterisation**: each edge is split into ≤64m pieces and every cell of each piece's `±width/2` corridor-rect AABB is bucketed. Now *provably* covers the full road+verge band. Self-check samples 9 offsets across the band (incl. between-rail) to prove it. | `plan.js`, `selfcheck.js` |
| R4 | **`stall` pool has only 1 facade** (Lane E validator wants ≥2) | Added `facade-corrugated.jpg` (market-shed backdrop) to the `stall` pool — matches Lane E's manifest facade→type map, which already tags corrugated for stall. Every type now has ≥2 facades. | `registry.js`, `CITY_SPEC.md` |

**New self-check assertions (regression guards):** exactly one `openLate` shop per seed; the late
shop closes ≥22:00 and isn't a stall; `chunkIndex` covers the full road corridor sampled densely
across the verge band (not just the centreline).

**Empirical result** (5 seeds): every town gets one late-night video store — e.g. seed 20261990 →
"Yass VIDEO" open till 23:00, seed 42 → "MOVIES" till 23:00, seed 1 → "RENTALS" till 22:00. Both
stall facades now appear in the market square.

### Notes for Fable / other lanes
- **Lane B can drop its private furniture-rasterisation workaround** if it likes — `chunkIndex.edges`
  now covers the whole corridor at the source, so any consumer (incl. Lane D footpath NPCs) can trust it.
- **Orientation:** CITY_SPEC (§Units/axes + Layer-1 schema) already specifies GLB front = **−Z** at
  `ry=0`, world facing `(−sin ry, −cos ry)` toward `frontEdge`; the self-check enforces it and B renders
  it correctly. Lane B's note prose says "+Z" informally — flagging only so the **−Z** spec stays the
  single reference for Lane C/E when modelling facades. No code change; it works.
- **Still-open design questions from round 1** (retail density ~493/core vs Lane B's draw budget; true
  closed residential ring) remain parked for your call — both are one-constant tunes, not rework.

## Round 3 — verification round (2026-07-14, per ROUND3_INSTRUCTIONS "Lane A — on-call + one verification")

Small round as briefed. All three tasks done; `bash tools/qa.sh --strict` **GREEN** (4/4 gates,
selfcheck 1283/1283, manifest 0 errors).

**1. F finding #5 — "shops with storeys outside the registry type range" → verified STALE / CLOSED.**
Scanned every shop across 8 seeds against the *correct* permitted range. Result: **zero violations.**
`video`/`milkbar`/`stall` (registry `[1,1]`) are observed at 1 storey only (e.g. 412 video shops, none
at 2 — so F's specific "video at 2" case does not occur). The only shops above their registry `max`
are the tall-capable types (`record`/`opshop`/`toy`/`book`/`pawn` `[1,2]`, `dept` `[2,3]`) reaching 3
via the intentional **corner anchor** — exactly the CITY_SPEC "occasional 3-storey corner anchor". My
round-1 `cornerBoost` gate (only boosts registry max ≥ 2) already prevents the reported bug.
  - **This is the source of `qa.sh`'s 5 consistency warnings** ("N shops have storeys outside their
    registry range … ask Lane A"). **They are benign** — all intended corner anchors, not plan↔registry
    drift. *Lane F: you can silence them by scoping the check to `permittedMax = max≥2 ? min(max+1,3) : max`
    instead of the strict registry `max`.*
  - **Hardened anyway** (the finding's real lesson): the selfcheck's storeys assertion was too lax
    (`<= Math.max(mx,3)` would have passed a video at 3). Tightened to the exact permitted range, so a
    single-storey type exceeding 1 (or any type past `min(max+1,3)`) now fails loudly. Proved non-vacuous
    (rejects `video@2`, `record@4`, `dept@1`; allows `record@3`). Documented the `storeys` rule in the
    CITY_SPEC schema so the intended-vs-drift question can't recur.

**2. Golden fingerprint confirmed.** Committed `GOLDEN.hash = 0x098eec2b` matches the current selfcheck
fingerprint on main. No output drift. (selfcheck.js assertion tightening doesn't touch the plan, so the
hash is unchanged.)

**3. Hours / `openLate` contract — ready for its first real consumer (Lane F §3.5).** No changes needed:
`hours=[open,close]` (24h ints, `0≤open<close≤23`), **exactly one `openLate:true` landmark per town**
(closes ≥22:00, video/milkbar, never a stall). ROUND3_INSTRUCTIONS §Lane F restates it correctly, so
F's night-gate wiring can consume it as-is. Full contract in CITY_SPEC schema + the round-2 notes above.