[verified] Snake 0.8: circular arena and larger 32px tiles

README.md

@@ -1,10 +1,11 @@
 # SNAKE — Xiaomi Watch S4
 
-Textured Snake on a 16×16 grid: 20px tiles, 320px board, centered on a round
+Textured Snake on a **368px circular arena**, centered on the round 466px
-466px screen. Existing PNG board, directional snake pieces, apple and icon are
+screen. **32px tiles** (60% larger than 0.7) occupy 89 legal cells of an 11×11
-preserved. Package identity: `com.ilias.snake`.
+bounding grid; every tile corner stays inside the actual circle. The square
+board frame is gone. Directional sprite artwork and user icon are preserved. Package identity: `com.ilias.snake`.
 
-**Version 0.7 (versionCode 7): locally tested and release-built; the new features
+**Version 0.8 (versionCode 8): locally tested and release-built; the new features
 still need an on-watch check.** Earlier versions rendered and played on the
 user's Watch S4 41mm. Node tests and numeric layout checks are not device tests.
 
@@ -15,14 +16,15 @@ user's Watch S4 41mm. Node tests and numeric layout checks are not device tests.
   queued direction. Excess inputs are ignored, not allowed to replace a turn.
 - **Tap the board, snake or apple** to pause. Tap **RESUME** (or an exposed part
   of the board) to resume. Pausing clears queued turns.
-- In the pause or game-over panel, select **CLASSIC** (walls end the run) or
+- In the pause or game-over panel, select **CLASSIC** (the circular boundary ends the run) or
-  **WRAP** (cross an edge to appear on the opposite edge). Changing mode starts
+  **WRAP** (cross the circular boundary to appear at the opposite legal end
+  of the **same row or column**). Changing mode starts
   a fresh, paused game; tap RESUME to begin. Selecting the current mode does not
   reset the run. The current mode is shown below the board.
 - Both modes end on self-collision. Moving into the vacating tail is legal.
 - **PLAY AGAIN** is a large 216×56px retry target. Retry keeps the selected mode,
   resets score/speed/queued turns, and starts playing. Filling the board displays
-  **YOU WIN** and hides the apple safely.
+  **YOU WIN** at 89 occupied cells (86 points) and hides the apple safely.
 - Leaving the page pauses it and stops the timer. Returning requires an explicit
   resume; game-over never resumes automatically. The system back action remains
   untouched. No crown, rotary, side-button or back interception APIs are used.
@@ -41,18 +43,24 @@ paused, finished or destroyed. Old timer callbacks are invalidated.
 Storage reads merge with the in-memory maximum; writes wait for the initial
 read and are serialized/coalesced so slow callbacks cannot overwrite a newer
 record. The coordinator survives page recreation within the module lifetime.
-Invalid saved values are ignored. Errors/exceptions do not interrupt gameplay:
+Old 0.7 records through 253 remain valid and are never reduced to the new
+86-point maximum. Invalid saved values are ignored. Errors/exceptions do not interrupt gameplay:
 failed reads/writes retry on later apples or page-show activity, without a retry
 loop. A failed/uncompleted write or immediate app termination may lose the
 unsaved record. Storage persistence still needs verification on the watch.
 
 ## Lightweight rendering
 
-Directional PNG tiles use only `left`/`top` positioning, no transforms or new
+Directional PNG tiles use only `left`/`top` positioning, no transforms. Existing
-art assets. Wrapped neighbors are normalized before classifying seam textures.
+20px sprite art is nearest-neighbor enlarged to native 32px assets (crisp pixel
-Food placement takes at most 256 cell checks, including a nearly full board.
+art, not new high-resolution detail). The board is a newly generated circular
-The HUD, footer, board and overlay fit the circular chord numerically with
+PNG with transparent corners and a subtle legal-cell checker pattern. Wrapped
-at least an 8px total horizontal safety allowance.
+texture connections handle each varying row/column length. All rows/columns
+have at least three cells, avoiding ambiguous one-/two-cell seams.
+Food scans only 89 legal cells, including a nearly full board. HUD/footer
+rectangles never overlap legal play tiles; text/overlay fit the watch chord.
+`tests/preview-0.8-static.png` is a static composition of actual geometry/art,
+with a legal-cell overlay—not a runtime screenshot.
 
 ## Build and test
 
@@ -62,13 +70,13 @@ npm test
 npm run release
 ```
 
-`npm test` runs the original core, piece and page tests, 13 incremental upgrade
+`npm test` runs the original core, piece and page tests, 14 upgrade
 regressions, the numeric layout suite, and deterministic randomized property tests. Upgrade coverage includes rapid
 swipes, lifecycle/timer races, storage failures and async ordering, mode changes,
 all four Wrap edges, seam textures, full-board victory and bounded food spawning.
 New behaviors were exercised through failing-then-passing test cycles.
 
-Release output: `dist/com.ilias.snake.release.0.7.rpk`. The locked
+Release output: `dist/com.ilias.snake.release.0.8.rpk`. The locked
 `aiot-toolkit` 2.0.5 uses the existing `sign/private.pem` and `sign/certificate.pem`;
 do not regenerate or commit those keys. Release uses plain JS (not JSC/protobuf),
 matching the previously working toolchain. The dependency lock is unchanged;
@@ -80,8 +88,8 @@ matching the previously working toolchain. The dependency lock is unchanged;
 - `src/pages/index/index.ux`: round-screen UI, swipe queue, game/lifecycle state.
 - `src/common/snake.js`: movement, collision, Wrap piece classification, food.
 - `src/common/best.js`: asynchronous storage coordinator.
-- `src/common/tex/`: preserved textured artwork.
+- `src/common/tex/`: native 32px sprite artwork and circular board.
-- `tests/{snake,pieces,page,upgrade,layout,properties}.cjs`: Node regression suites.
+- `tests/{snake,pieces,page,upgrade,layout,properties,round,art,round-history}.cjs`: Node regression suites, including history-based circular seam orientation checks.
 
 Install the signed RPK through AstroBox. Source/releases live at
 https://gitea.oimcloud.myaddr.tools/codex-bot/vela-snake — publication is a

package.json

@@ -4,7 +4,7 @@
   "private": true,
   "description": "Textured Snake for the round Xiaomi Watch S4 screen",
   "scripts": {
-    "test": "node tests/snake.cjs && node tests/pieces.cjs && node tests/page.cjs && node --test tests/upgrade.cjs && node tests/layout.cjs && node tests/properties.cjs",
+    "test": "node tests/snake.cjs && node tests/pieces.cjs && node tests/page.cjs && node --test tests/upgrade.cjs && node tests/layout.cjs && node tests/properties.cjs && node tests/round.cjs && node tests/art.cjs && node tests/round-history.cjs",
     "build": "aiot build",
     "release": "aiot release",
     "build:source-map": "aiot build --devtool=source-map",

src/common/snake.js

@@ -1,4 +1,18 @@
-// Snake core — pure functions, no Vela APIs. Exports: initialSnake, step, turn, spawnFood.
+// Shared geometry: 32px tiles wholly inside the 368px circular arena.
+const ARENA = { cell: 32, size: 11, offset: 57, radius: 184, cells: [], rows: [], columns: [] }
+for (let y = 0; y < ARENA.size; y++) {
+  ARENA.rows[y] = []
+  ARENA.columns[y] = []
+}
+for (let y = 0; y < ARENA.size; y++) for (let x = 0; x < ARENA.size; x++) {
+  const dx = Math.abs((x + 0.5) * ARENA.cell - 176) + ARENA.cell / 2
+  const dy = Math.abs((y + 0.5) * ARENA.cell - 176) + ARENA.cell / 2
+  if (dx * dx + dy * dy <= ARENA.radius * ARENA.radius) {
+    ARENA.cells.push({ x, y })
+    ARENA.rows[y].push(x)
+    ARENA.columns[x].push(y)
+  }
+}
 function initialSnake() {
   return [
     { x: 6, y: 7 },
@@ -12,13 +26,22 @@ function step(snake, dir, food, N, mode) {
   const head = snake[0]
   let nx = head.x + dir.x
   let ny = head.y + dir.y
-  if (mode === 'wrap') {
+  if (typeof N === 'object') {
+    const row = N.rows[ny]
+    if (!row || row.indexOf(nx) === -1) {
+      if (mode !== 'wrap') return { snake, ate: false, alive: false }
+      const span = dir.x ? N.rows[head.y] : N.columns[head.x]
+      const opposite = dir.x + dir.y > 0 ? span[0] : span[span.length - 1]
+      if (dir.x) nx = opposite
+      else ny = opposite
+    }
+  } else if (mode === 'wrap') {
     nx = (nx + N) % N
     ny = (ny + N) % N
   } else if (nx < 0 || ny < 0 || nx >= N || ny >= N) {
     return { snake, ate: false, alive: false }
   }
-  const ate = (nx === food.x && ny === food.y)
+  const ate = !!food && (nx === food.x && ny === food.y)
   // tail cell vacates unless we grew, so exclude it from self-collision check
   const body = ate ? snake : snake.slice(0, snake.length - 1)
   for (let i = 0; i < body.length; i++) {
@@ -44,13 +67,22 @@ function renderPieces(snakeCells, dir, N) {
   const D = { '1,0': 'e', '-1,0': 'w', '0,-1': 'n', '0,1': 's' }
   const opp = { e: 'w', w: 'e', n: 's', s: 'n' }
   const delta = d => N && d === N - 1 ? -1 : N && d === 1 - N ? 1 : d
+  // Circular seams join the endpoints of this row/column, not the bounding grid.
+  const side = (s, neighbor) => {
+    let dx = neighbor.x - s.x, dy = neighbor.y - s.y
+    if (N && typeof N === 'object') {
+      if (Math.abs(dx) > 1) dx = dx > 0 ? -1 : 1
+      if (Math.abs(dy) > 1) dy = dy > 0 ? -1 : 1
+    } else { dx = delta(dx); dy = delta(dy) }
+    return D[dx + ',' + dy]
+  }
   return snakeCells.map((s, i) => {
     if (i === 0) return 'head_' + D[dir.x + ',' + dir.y]
     const prev = snakeCells[i - 1]
     const next = snakeCells[i + 1]
-    const from = D[delta(prev.x - s.x) + ',' + delta(prev.y - s.y)]       // side toward head
+    const from = side(s, prev)       // side toward head
     if (!next) return 'tail_' + opp[from]                       // tip points away from body
-    const to = D[delta(next.x - s.x) + ',' + delta(next.y - s.y)]         // side toward tail tip
+    const to = side(s, next)         // side toward tail tip
     if ((from === 'e' || from === 'w') && (to === 'e' || to === 'w')) return 'body_h'
     if ((from === 'n' || from === 's') && (to === 'n' || to === 's')) return 'body_v'
     // corner: name = the two sides it connects; pairs are alphabetically sorted
@@ -75,6 +107,10 @@ function rotateDir(dir, clockwise) {
 // Random empty cell, avoiding the snake.
 function spawnFood(snake, N) {
   const occupied = new Set(snake.map(s => s.x + ',' + s.y))
+  if (typeof N === 'object') {
+    const empty = N.cells.filter(c => !occupied.has(c.x + ',' + c.y))
+    return empty.length ? empty[Math.floor(Math.random() * empty.length)] : null
+  }
   if (occupied.size >= N * N) return null
   // Select an empty-cell rank uniformly; at most N*N checks, even almost full.
   let rank = Math.floor(Math.random() * (N * N - occupied.size))
@@ -89,4 +125,4 @@ function spawnFood(snake, N) {
   return null
 }
 
-module.exports = { initialSnake, step, turn, renderPieces, rotateDir, spawnFood }
+module.exports = { ARENA, initialSnake, step, turn, renderPieces, rotateDir, spawnFood }

src/manifest.json

@@ -2,8 +2,8 @@
   "package": "com.ilias.snake",
   "name": "SNAKE",
   "icon": "/common/icon.png",
-  "versionName": "0.7",
+  "versionName": "0.8",
-  "versionCode": 7,
+  "versionCode": 8,
   "minAPILevel": 1,
   "deviceTypeList": [
     "watch"

src/pages/index/index.ux

@@ -10,7 +10,7 @@
       </div>
       <div class="footer">
         <text class="modeLabel">{{ modeText }}</text>
-        <text class="hint">swipe / tap to pause</text>
+        <text class="hint">swipe / tap pause</text>
       </div>
       <div class="overlay" show="{{ paused && !over }}">
         <text class="overText">PAUSED</text>
@@ -40,14 +40,14 @@ import snake from '../../common/snake.js'
 import storage from '@system.storage'
 import best from '../../common/best.js'
 
-const CELL = 20
+const CELL = snake.ARENA.cell
-const GRID = 16
+const GRID = snake.ARENA
-const OFFSET = 73
+const OFFSET = snake.ARENA.offset
 
 export default {
   private: {
     snake: [],
-    food: { left: '73px', top: '73px' },
+    food: { left: '57px', top: '57px' },
     hasFood: true,
     endText: 'GAME OVER',
     scoreText: 'SCORE 0',
@@ -195,41 +195,41 @@ export default {
   width: 466px; height: 466px;
 }
 .board {
-  position: absolute; left: 73px; top: 73px;
+  position: absolute; left: 49px; top: 49px;
-  width: 320px; height: 320px;
+  width: 368px; height: 368px;
 }
 .seg {
   position: absolute;
-  width: 20px; height: 20px;
+  width: 32px; height: 32px;
 }
 .food {
   position: absolute;
-  width: 20px; height: 20px;
+  width: 32px; height: 32px;
 }
 .score {
-  width: 188px; height: 22px;
+  width: 152px; height: 20px;
   color: #d8edce; font-size: 18px; text-align: center;
 }
 .best {
-  width: 188px; height: 22px;
+  width: 152px; height: 20px;
   color: #f3bd60; font-size: 17px; text-align: center;
 }
 .hud {
-  position: absolute; left: 139px; top: 24px;
+  position: absolute; left: 157px; top: 16px;
-  width: 188px; height: 44px;
+  width: 152px; height: 40px;
   flex-direction: column; align-items: center;
 }
 .footer {
-  position: absolute; left: 135px; top: 400px;
+  position: absolute; left: 143px; top: 410px;
-  width: 196px; height: 40px;
+  width: 180px; height: 36px;
   flex-direction: column; align-items: center;
 }
 .modeLabel {
-  width: 196px; height: 20px;
+  width: 180px; height: 18px;
   color: #cee4bd; font-size: 17px; text-align: center;
 }
 .hint {
-  width: 196px; height: 20px;
+  width: 180px; height: 18px;
   color: #adb7c6; font-size: 16px; text-align: center;
 }
 .overlay {

tests/art.cjs

@@ -0,0 +1,8 @@
+const assert=require('node:assert/strict'), fs=require('node:fs'), zlib=require('node:zlib')
+const a=require('../src/common/snake.js').ARENA
+for(const name of fs.readdirSync('src/common/tex').filter(n=>n.endsWith('.png'))) {
+ const b=fs.readFileSync('src/common/tex/'+name)
+ const size=name==='board.png'?a.radius*2:a.cell
+ assert.equal(b.readUInt32BE(16),size,name+' width');assert.equal(b.readUInt32BE(20),size,name+' height')
+}
+console.log('NATIVE ART DIMENSIONS PASS')

tests/layout.cjs

@@ -8,7 +8,20 @@ function rule(name) {
   return Object.fromEntries(m[1].split(';').filter(s=>s.includes(':')).map(s=>s.trim().split(/:\s*/)))
 }
 function px(r,k) { assert.match(r[k] || '', /^\d+px$/, k); return Number(r[k].slice(0,-2)) }
-for (const name of ['board','hud','footer','overlay']) {
+const arena = require('../src/common/snake.js').ARENA
+assert.equal(px(rule('seg'),'width'),arena.cell)
+assert.equal(px(rule('seg'),'height'),arena.cell)
+assert.equal(px(rule('food'),'width'),arena.cell)
+const board=rule('board')
+assert.equal(px(board,'width'),arena.radius*2)
+assert.equal(px(board,'height'),arena.radius*2)
+assert.equal(px(board,'left')+arena.radius,233)
+assert.equal(px(board,'top')+arena.radius,233)
+for(const c of arena.cells) for(const name of ['hud','footer']) {
+ const r=rule(name), x=arena.offset+c.x*arena.cell,y=arena.offset+c.y*arena.cell
+ assert.ok(x+arena.cell<=px(r,'left') || x>=px(r,'left')+px(r,'width') || y+arena.cell<=px(r,'top') || y>=px(r,'top')+px(r,'height'), 'legal cell never overlaps '+name)
+}
+for (const name of ['hud','footer','overlay']) {
   const r = rule(name), x=px(r,'left'), y=px(r,'top'), w=px(r,'width'), h=px(r,'height')
   const dy = Math.max(Math.abs(y-233), Math.abs(y+h-233))
   const chord = 2*Math.sqrt(233*233-dy*dy)

tests/make_round_art.py

@@ -0,0 +1,64 @@
+"""Create circular board and static preview from the real JS geometry and PNG art.
+Preview is a composited illustration, NOT a Vela runtime screenshot.
+Existing sprite art is nearest-neighbor enlarged to native 32px, not blurred.
+"""
+import json
+from pathlib import Path
+import subprocess
+from PIL import Image, ImageDraw, ImageFont
+ROOT = Path(__file__).resolve().parents[1]
+a = json.loads(subprocess.check_output(['node', '-p', "JSON.stringify(require('./src/common/snake.js').ARENA)"], cwd=ROOT))
+tex = ROOT / 'src/common/tex'
+for p in tex.glob('*.png'):
+    if p.name != 'board.png':
+        img = Image.open(p).convert('RGBA')
+        if img.size != (a['cell'], a['cell']):
+            img.resize((a['cell'], a['cell']), Image.Resampling.NEAREST).save(p)
+S=4
+size=a['radius']*2
+board=Image.new('RGBA',(size*S,size*S),(0,0,0,0))
+d=ImageDraw.Draw(board)
+d.ellipse((0,0,size*S-1,size*S-1),fill='#14251e',outline='#36513c',width=2*S)
+local=a['offset']-(233-a['radius'])
+for c in a['cells']:
+    x=(local+c['x']*a['cell'])*S;y=(local+c['y']*a['cell'])*S
+    d.rectangle((x,y,x+a['cell']*S-1,y+a['cell']*S-1),fill=('#1d3227' if (c['x']+c['y'])%2 else '#20362a'))
+board=board.resize((size,size),Image.Resampling.LANCZOS)
+board.save(tex/'board.png')
+# Read actual CSS text placement/colors instead of inventing a separate layout.
+import re
+ux=(ROOT/'src/pages/index/index.ux').read_text()
+def rule(name):
+    body=re.search(r'\.'+name+r'\s*\{([^}]+)\}',ux)[1]
+    return dict(re.findall(r'([\w-]+):\s*([^;]+)',body))
+def px(r,key): return int(r[key].removesuffix('px'))
+font=subprocess.check_output(['fc-match','-f','%{file}','sans'],text=True)
+canvas=Image.new('RGB',(980,526),'#10131a')
+for panel,mask in enumerate([False,True]):
+    watch=Image.new('RGBA',(466,466),'black');watch.alpha_composite(board,(233-a['radius'],233-a['radius']))
+    wd=ImageDraw.Draw(watch)
+    if mask:
+        for c in a['cells']:
+            x=a['offset']+c['x']*a['cell'];y=a['offset']+c['y']*a['cell']
+            wd.rectangle((x,y,x+a['cell']-1,y+a['cell']-1),outline='#71967a')
+    cells=[{'x':7,'y':4},{'x':6,'y':4},{'x':5,'y':4},{'x':5,'y':5},{'x':4,'y':5},{'x':3,'y':5}]
+    names=json.loads(subprocess.check_output(['node','-p',f"JSON.stringify(require('./src/common/snake.js').renderPieces({json.dumps(cells)},{{x:1,y:0}}))"],cwd=ROOT))
+    for c,name in zip(cells,names):
+        watch.alpha_composite(Image.open(tex/(name+'.png')),(a['offset']+c['x']*a['cell'],a['offset']+c['y']*a['cell']))
+    watch.alpha_composite(Image.open(tex/'apple.png'),(a['offset']+8*a['cell'],a['offset']+6*a['cell']))
+    for parent,entries in [('hud',[('score','SCORE 3'),('best','BEST 253')]),('footer',[('modeLabel','CLASSIC'),('hint','swipe / tap pause')])]:
+        pr=rule(parent); y=px(pr,'top')
+        for cls,text in entries:
+            r=rule(cls); f=ImageFont.truetype(font,px(r,'font-size'))
+            wd.text((233,y+px(r,'height')/2),text,font=f,fill=r['color'],anchor='mm')
+            y+=px(r,'height')
+    circle=Image.new('L',(466,466));ImageDraw.Draw(circle).ellipse((0,0,465,465),fill=255)
+    canvas.paste(watch.convert('RGB'),(12+panel*490,12),circle)
+cd=ImageDraw.Draw(canvas)
+cd.text((20,490),'STATIC ART / GEOMETRY COMPOSITE — NOT WATCH RUNTIME',fill='white',font=ImageFont.truetype(font,16))
+cd.text((510,490),'Legal-cell overlay: 89 cells, 32px tiles',fill='white',font=ImageFont.truetype(font,16))
+canvas.save(ROOT/'tests/preview-0.8-static.png')
+print(ROOT/'tests/preview-0.8-static.png')
+# Alpha corners prove the replacement board is circular, not a square frame.
+assert all(board.getpixel(p)[3]==0 for p in [(0,0),(size-1,0),(0,size-1),(size-1,size-1)])
+print('Circular PNG alpha corners verified; native 32px sprites generated.')

tests/page.cjs

@@ -7,13 +7,13 @@ const snake = require('../src/common/snake.js');
 const ux = fs.readFileSync('src/pages/index/index.ux', 'utf8');
 const body = ux.match(/<script>([\s\S]*?)<\/script>/)[1]
   .replace(/import\s+\w+\s+from\s+'[^']*';?/g, '')
-  .replace(/^const\s+\w+\s*=[^\n]*\n/gm, '')
+  .replace('export default', 'globalThis.spec =');
-  .replace('export default', '');
 
 const sandbox = { best: require('../src/common/best.js'), storage: {get() {}, set() {}}, snake, Date, Math, String, Number, console, setInterval: () => 0, clearInterval: () => {},
-  CELL: 20, GRID: 16, OFFSET: 73 };
+};
 vm.createContext(sandbox);
-const spec = vm.runInContext('(' + body + ')', sandbox);
+vm.runInContext(body, sandbox);
+const spec = sandbox.spec;
 
 function mk() {
   const o = Object.assign({}, spec, JSON.parse(JSON.stringify(spec.private)));
@@ -29,10 +29,10 @@ assert.match(c.snake[0].src, /head_e\.png$/, 'head texture');
 assert.match(c.snake[1].src, /body_h\.png$/, 'body texture');
 assert.match(c.snake[2].src, /tail_w\.png$/, 'tail texture');
 assert.equal(c.scoreText, 'SCORE 0');
-assert.equal(c.snake[0].left, (73 + 6 * 20) + 'px', 'head x mapped to px');
+assert.equal(c.snake[0].left, (snake.ARENA.offset + 6 * snake.ARENA.cell) + 'px', 'head x mapped to px');
 
-for (let i = 0; i < 5; i++) c.tick();
+for (let i = 0; i < 1; i++) c.tick();
-assert.equal(c.model[0].x, 11, 'head moved right 5 steps from x=6');
+assert.equal(c.model[0].x, 7, 'head moved right one step from x=6');
 assert.equal(c.over, false);
 
 c.onSwipe({ direction: 'down' });
@@ -47,8 +47,8 @@ c.tick();
 assert.equal(c.dir.x, 0, 'reversal keeps x');
 assert.equal(c.dir.y, 1, 'reversal blocked');
 
-// run into the wall to trigger game over (GRID=16, last column x=15)
+// Hit the actual circular boundary.
-c.model = [{ x: 15, y: 5 }, { x: 14, y: 5 }, { x: 13, y: 5 }];
+c.model = [{ x: 10, y: 5 }, { x: 9, y: 5 }, { x: 8, y: 5 }];
 c.dir = { x: 1, y: 0 };
 c.pending = null;
 c.tick();

tests/properties.cjs

@@ -5,19 +5,19 @@ let seed=83971
 const rand=()=>{seed=(Math.imul(seed,1664525)+1013904223)>>>0;return seed/4294967296}
 const dirs=[{x:1,y:0},{x:0,y:1},{x:-1,y:0},{x:0,y:-1}]
 let moves=0, seams=0
-for(const mode of ['classic','wrap']) for(let game=0;game<1000;game++) {
+for(const board of [16,snake.ARENA]) for(const mode of ['classic','wrap']) for(let game=0;game<1000;game++) {
  let cells=snake.initialSnake(),dir=dirs[0]
  for(let tick=0;tick<100;tick++) {
   dir=snake.turn(dir,dirs[Math.floor(rand()*4)])
   const h=cells[0]
-  const food=rand()<0.3?{x:(h.x+dir.x+16)%16,y:(h.y+dir.y+16)%16}:{x:0,y:0}
+  const food=rand()<0.3?snake.step([h],dir,null,board,'wrap').snake[0]:null
-  const r=snake.step(cells,dir,food,16,mode)
+  const r=snake.step(cells,dir,food,board,mode)
   if(!r.alive)break
   if(Math.abs(r.snake[0].x-h.x)>1||Math.abs(r.snake[0].y-h.y)>1)seams++
   cells=r.snake
   assert.equal(new Set(cells.map(c=>c.x+','+c.y)).size,cells.length)
-  for(const c of cells)assert.ok(c.x>=0&&c.x<16&&c.y>=0&&c.y<16)
+  for(const c of cells)assert.ok(board===16 ? c.x>=0&&c.x<16&&c.y>=0&&c.y<16 : snake.ARENA.rows[c.y].includes(c.x))
-  for(const name of snake.renderPieces(cells,dir,16))assert.ok(fs.existsSync(require('node:path').join(__dirname,'../src/common/tex',name+'.png')),name)
+  for(const name of snake.renderPieces(cells,dir,board))assert.ok(fs.existsSync(require('node:path').join(__dirname,'../src/common/tex',name+'.png')),name)
   moves++
  }
 }

tests/round-history.cjs

@@ -0,0 +1,30 @@
+const assert=require('node:assert/strict')
+const c=require('../src/common/snake.js'),a=c.ARENA
+let seed=408;const random=()=>{seed=(Math.imul(seed,1664525)+1013904223)>>>0;return seed/4294967296};Math.random=random
+const dirs=[{x:1,y:0},{x:0,y:1},{x:-1,y:0},{x:0,y:-1}],names=['e','s','w','n'],opp={e:'w',w:'e',n:'s',s:'n'}
+const side=d=>names[dirs.findIndex(v=>v.x===d.x&&v.y===d.y)]
+let moves=0,seams=0
+for(const mode of ['classic','wrap'])for(let game=0;game<1000;game++){
+ let model=c.initialSnake(),arrivals=model.map(()=>dirs[0]),dir=dirs[0],food=c.spawnFood(model,a)
+ for(let tick=0;tick<250;tick++){
+  dir=c.turn(dir,dirs[Math.floor(random()*4)])
+  const result=c.step(model,dir,food,a,mode)
+  if(!result.alive)break
+  if(Math.abs(result.snake[0].x-model[0].x)+Math.abs(result.snake[0].y-model[0].y)>1)seams++
+  model=result.snake;arrivals.unshift(dir);if(!result.ate)arrivals.pop()
+  assert.equal(new Set(model.map(p=>p.x+','+p.y)).size,model.length)
+  for(const p of model)assert.ok(a.rows[p.y].includes(p.x))
+  const expected=model.map((p,i)=>{
+   if(i===0)return 'head_'+side(dir)
+   const from=side(arrivals[i-1]);if(i===model.length-1)return 'tail_'+opp[from]
+   const to=opp[side(arrivals[i])]
+   if((from==='e'||from==='w')&&(to==='e'||to==='w'))return 'body_h'
+   if((from==='n'||from==='s')&&(to==='n'||to==='s'))return 'body_v'
+   return 'corner_'+[from,to].sort().join('')
+  })
+  assert.deepEqual(c.renderPieces(model,dir,mode==='wrap'?a:0),expected)
+  moves++
+  if(result.ate){food=c.spawnFood(model,a);if(!food)break}
+ }
+}
+console.log(JSON.stringify({roundMovesChecked:moves,wrapSeamsChecked:seams,historyBasedTextureClassification:'passed'}))

tests/round.cjs

@@ -0,0 +1,38 @@
+const assert = require('node:assert/strict')
+const snake = require('../src/common/snake.js')
+assert.ok(snake.ARENA, 'shared circular arena exists')
+const a = snake.ARENA
+assert.equal(a.cell,32); assert.equal(a.radius,184); assert.equal(a.offset,57)
+assert.equal(a.cells.length,89)
+const widths=[]
+for(let y=0;y<a.size;y++) {
+ const row=a.cells.filter(c=>c.y===y); widths.push(row.length)
+ for(const c of row) {
+  const dx=Math.abs(a.offset+(c.x+.5)*a.cell-233)+a.cell/2
+  const dy=Math.abs(a.offset+(c.y+.5)*a.cell-233)+a.cell/2
+  assert.ok(dx*dx+dy*dy<=a.radius*a.radius,'whole tile inside circle')
+ }
+}
+assert.deepEqual(widths,[3,7,9,9,11,11,11,9,9,7,3])
+assert.ok(snake.initialSnake().every(c=>a.cells.some(p=>p.x===c.x&&p.y===c.y)))
+// Exhaust every varying row/column boundary, including shortest rows.
+for(const horizontal of [true,false]) for(let line=0;line<a.size;line++) {
+ const span=horizontal?a.rows[line]:a.columns[line]
+ for(const sign of [-1,1]) {
+  const edge=sign===1?span[span.length-1]:span[0], opposite=sign===1?span[0]:span[span.length-1]
+  const c=v=>horizontal?{x:v,y:line}:{x:line,y:v}
+  const dir=horizontal?{x:sign,y:0}:{x:0,y:sign}
+  const cells=[c(edge),c(edge-sign),c(edge-sign*2)]
+  assert.equal(snake.step(cells,dir,null,a,'classic').alive,false)
+  const r=snake.step(cells,dir,null,a,'wrap')
+  assert.equal(r.alive,true); assert.deepEqual(r.snake[0],c(opposite))
+  assert.deepEqual(snake.renderPieces(r.snake,dir,a),[horizontal?(sign===1?'head_e':'head_w'):(sign===1?'head_s':'head_n'),horizontal?'body_h':'body_v',horizontal?(sign===1?'tail_w':'tail_e'):(sign===1?'tail_n':'tail_s')])
+ }
+}
+const original=Math.random
+try {
+ Math.random=()=>0
+ for(const empty of a.cells) assert.deepEqual(snake.spawnFood(a.cells.filter(c=>c!==empty),a),empty)
+ assert.equal(snake.spawnFood(a.cells,a),null)
+} finally {Math.random=original}
+console.log('ROUND ARENA GEOMETRY / MOVEMENT / FOOD / SEAMS PASS')

tests/upgrade.cjs

@@ -40,13 +40,12 @@ test('retired timer callbacks cannot advance a resumed or restarted run', () =>
 })
 test('filling the board wins without null food crashes and retry clears the result', () => {
   const {p, timers} = page()
-  // A serpentine Hamilton path, head (14,0), final food (15,0).
+  // Legal occupancy fixture isolates final-cell victory from pathfinding.
-  const path = []
+  p.model = [{x:5,y:0}, ...snake.ARENA.cells.filter(c=>!(c.y===0 && (c.x===5 || c.x===6)))]
-  for (let y=0;y<16;y++) for (let k=0;k<16;k++) path.push({x:y%2 ? k : 15-k,y})
+  p.dir = {x:1,y:0}; p.foodModel = {x:6,y:0}
-  p.model = path.slice(1); p.dir = {x:1,y:0}; p.foodModel = {x:15,y:0}
   p.tick(); assert.equal(p.over, true); assert.equal(p.endText, 'YOU WIN')
-  assert.equal(p.scoreText, 'SCORE 253'); assert.equal(p.bestText, 'BEST 253')
+  assert.equal(p.scoreText, 'SCORE 86'); assert.equal(p.bestText, 'BEST 86')
-  assert.equal(p.hasFood, false); assert.equal(p.snake.length, 256); assert.equal(timers.size, 0)
+  assert.equal(p.hasFood, false); assert.equal(p.snake.length, 89); assert.equal(timers.size, 0)
   p.tick(); p.onShow(); assert.equal(timers.size, 0)
   p.restart(); assert.equal(p.hasFood, true); assert.equal(p.endText, 'GAME OVER'); assert.equal(p.model.length, 3)
   assert.match(ux, /show="\{\{ hasFood \}\}"/)
@@ -58,11 +57,11 @@ test('select modes while paused or over, resetting safely, and retry keeps mode'
   p.selectMode('wrap'); assert.equal(p.mode, 'classic', 'no mid-run mode change')
   p.onTap(); p.selectMode('garbage'); assert.equal(p.mode, 'classic')
   p.selectMode('wrap'); assert.equal(p.mode, 'wrap'); assert.equal(p.paused, true); assert.equal(timers.size, 0)
-  p.onTap(); p.model = [{x:15,y:7},{x:14,y:7},{x:13,y:7}]; p.tick()
+  p.onTap(); p.model = [{x:9,y:7},{x:8,y:7},{x:7,y:7}]; p.tick()
-  assert.equal(p.model[0].x, 0); assert.match(p.snake[1].src, /body_h/)
+  assert.equal(p.model[0].x, 1); assert.match(p.snake[1].src, /body_h/)
   p.restart(); assert.equal(p.mode, 'wrap'); assert.equal(timers.size, 1)
   p.onTap(); p.selectMode('classic'); p.onTap()
-  p.model = [{x:15,y:7},{x:14,y:7},{x:13,y:7}]; p.tick()
+  p.model = [{x:9,y:7},{x:8,y:7},{x:7,y:7}]; p.tick()
   assert.equal(p.over, true); assert.equal(timers.size, 0)
   p.onShow(); p.onTap(); assert.equal(p.over, true); assert.equal(timers.size, 0)
   p.restart(); assert.equal(p.over, false); assert.equal(timers.size, 1)
@@ -95,7 +94,7 @@ test('Wrap crosses every edge, still collides with body and renders seam connect
   assert.deepEqual(snake.renderPieces([{x:0,y:7},{x:15,y:7}], dirs[0], 16), ['head_e','tail_w'])
 })
 function eatTo(p, score) {
-  p.model = [{x:6,y:7}, ...Array.from({length:score+1}, (_,i) => ({x:i%16,y:12+Math.floor(i/16)}))]
+  p.model = [{x:6,y:7}, ...snake.ARENA.cells.filter(c=>c.y!==7).slice(0,score+1)]
   p.dir = {x:1,y:0}; p.foodModel = {x:7,y:7}; p.tick()
 }
 test('late best read cannot lower local record; writes are serialized', () => {
@@ -124,12 +123,18 @@ test('storage throws and corrupt values never crash or poison gameplay', () => {
     assert.equal(p.bestText, 'BEST 0'); eatTo(p, 1); assert.equal(p.bestText, 'BEST 1')
   }
 })
+test('legacy 0.7 records above the new arena maximum survive', () => {
+ const writes=[]
+ const {p}=page({get(o){o.success('253')},set(o){writes.push(o)}})
+ eatTo(p,20); p.restart()
+ assert.equal(p.bestText,'BEST 253'); assert.equal(writes.length,0)
+})
 test('best score loads raw storage value and persists only new records', () => {
   let get; const writes = []
   const {p} = page({get(o) { get=o }, set(o) { writes.push(o) }})
   assert.ok(get, 'best score requested'); assert.equal(get.default, '0')
   get.success('4'); assert.equal(p.bestText, 'BEST 4')
-  p.model = [{x:6,y:7}, ...Array.from({length:6}, (_,i) => ({x:i,y:12}))]
+  p.model = [{x:6,y:7}, ...snake.ARENA.cells.filter(c=>c.y!==7).slice(0,6)]
   p.foodModel = {x:7,y:7}; p.tick()
   assert.equal(p.bestText, 'BEST 5'); assert.equal(writes.length, 1)
   assert.equal(writes[0].value, '5'); assert.equal(writes[0].key, get.key)
@@ -141,7 +146,7 @@ test('eating updates live score and accelerates to a capped 120ms', () => {
   const {p, timers} = page()
   assert.equal([...timers.values()][0].ms, 300)
   for (let score = 1; score <= 20; score++) {
-    p.model = [{x:6,y:7}, ...Array.from({length:score+1}, (_,i) => ({x:i%16,y:12+Math.floor(i/16)}))]
+    p.model = [{x:6,y:7}, ...snake.ARENA.cells.filter(c=>c.y!==7).slice(0,score+1)]
     p.dir = {x:1,y:0}; p.foodModel = {x:7,y:7}; p.tick()
     assert.equal(p.scoreText, 'SCORE ' + score)
     assert.equal(timers.size, 1); assert.equal([...timers.values()][0].ms, Math.max(120, 300-score*10))