Unify task examples, add chart tooltips and bound scene loading

README.md

@@ -29,3 +29,11 @@ Deployment remains this Hugging Face static Space: `index.html` and `cases.html`
 The Pareto renderer (`assets/pareto.js`) ports the reference toolkit's reversed logarithmic cost axis, connected frontier, provider palette and greedy collision-aware label placement. `data/pareto.json` combines unrounded scores from the existing `data/site.js` with exact mean costs from the original published tables; all three task views recompute non-dominance from those values. The table displays three decimals but sorts at source precision.
 
 Homepage scenes (`assets/scene-cards.js`) adapt BuildingBench's shared WebGL renderer and per-view canvas engine. Existing public packed models are decoded with the same adapter as `cases.html`; geometry and the full case explorer remain unchanged. Visible scenes load automatically; repeated scenes share decoded assets. Drag or arrow keys orbit, wheel or +/- zoom, and the pause control stops rotation. Both Image-to-Scene cards switch between the saved repair, corrupted input and ground truth using the reference camera.
+
+## Interaction and loading reliability
+
+Task Format switches the entire construction/editing example, including instructions, inputs, saved output and evaluator. Bar marks, labels and Pareto points share pointer, keyboard and tap tooltips with source-precision scores and costs in `data/leaderboard-details.json`. The ranking supports filtering and source-precision sorting.
+
+Homepage model work uses a shared two-job download/decode queue. Hidden/offscreen views release their request; stale results cannot replace the selected state. Card textures are limited to 512px and render resolution is bounded, while original model files and the full case explorer stay intact. Idle decoded assets are evicted; the 128 MiB cache target is not a hard limit on currently visible geometry. Downloads show progress, abort after 20 seconds without data or 90 seconds total, retry once, then expose an explicit Retry button. Context loss pauses drawing and restoration rebuilds the environment; failures expose recovery instead of an indefinite loading overlay.
+
+Queue tests: `node --test tests/scene-assets.test.mjs`. Browser QA includes public-model cold loads, quick scrolling, task/repair switching, desktop/mobile resize, forced HTTP failures, stalled downloads, retry and WebGL context loss.

assets/buildingbench.css

@@ -31,3 +31,8 @@ section,section.alt,section.dark{padding:34px 0;background:transparent;color:var
 @media(max-width:650px){.case-grid{grid-template-columns:1fr}.tk figure>.live-scene{height:260px}}
 .pareto-card .figure-title{color:#1a1a1a!important}.pareto-card .figure-title span{color:#8d8d8d}
 .pareto-swipe{display:none}@media(max-width:650px){.pareto-swipe{display:block;font:10px Inter,sans-serif;color:#7d857f;margin:6px 0}}
+/* Unified task format and reference-style chart interaction. */
+[hidden]{display:none!important}.task-tabs{display:flex;gap:4px;padding:4px;background:#f0f3ef;border:1px solid #d7dbd5;border-radius:9px;width:max-content;max-width:100%;margin:0 0 22px}.task-tabs button{border:0;background:none;border-radius:6px;padding:10px 18px;font:600 12px Inter,sans-serif;color:#778178;cursor:pointer}.task-tabs [aria-selected=true]{background:white;color:#17201d;box-shadow:0 1px 4px #17201d15}.task-content>h3{font-size:22px;letter-spacing:-.6px;line-height:1.35;margin:0 0 5px}.task-content>h3 span{font-weight:500}.task-content .task-columns{align-items:stretch}.task-formula{font:11px/1.7 'IBM Plex Mono',monospace;color:#58665c;margin:12px 0 0}.input-panel .live-scene{height:255px;border-radius:12px}.task-reference{display:flex;align-items:center;gap:10px;margin-top:12px;font:11px/1.5 Inter,sans-serif;color:#35687e}.task-reference img{width:70px;height:48px;border-radius:5px;object-fit:cover}.task-content .scene-versions{padding:8px 3px;border:0;background:transparent}.scene-loading{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:10px;font-size:12px;text-align:center;padding:16px;z-index:3;background:#e6edf0e8}.scene-retry{pointer-events:auto;cursor:pointer;border:1px solid #81998e;background:#fffefb;border-radius:7px;color:#294c41;padding:8px 14px;font:600 12px Inter,sans-serif}.live-scene[data-state-phase=error] .scene-loading{color:#684839}.chart-tooltip{position:fixed;z-index:1100;max-width:calc(100vw - 16px);padding:14px 17px;background:#fffefb;border:1px solid #d7dbd5;border-radius:11px;color:#4a544f;box-shadow:0 5px 24px #17201d24;opacity:0;pointer-events:none;font:12px/1.65 Inter,sans-serif}.chart-tooltip.on{opacity:1}.chart-tooltip strong{display:block;color:#17201d;font-size:13px}.tooltip-provider{display:block;font-size:10px;color:#7d857f;margin:1px 0 8px}.chart-tooltip dl{display:grid;grid-template-columns:auto auto;gap:4px 16px;margin:0}.chart-tooltip dd{font:11px/1.8 'IBM Plex Mono',monospace;text-align:right;margin:0;color:#17201d}.chart-node{cursor:pointer;transition:opacity .12s}.chart-node.dim{opacity:.23}.chart-node.hot .bar{filter:brightness(1.08)}.chart-node:focus{outline:none}.chart-node:focus .bar{stroke:#17201d;stroke-width:2}.bar-card,.pareto-card,.ranking-card{padding:24px!important;border-radius:20px}.bar-heading{padding:0!important}.bar-scroll{margin-top:14px}.bar-card .note{margin:0!important}.kit-bars{min-width:1000px}.pareto-svg{min-width:1100px}.figure-caption{margin-left:0!important;margin-right:0!important}.lb-tabs{position:static!important}.ranking-toolbar{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin:0 0 20px}.ranking-toolbar label{display:grid;gap:7px;font:500 11px Inter,sans-serif;color:#65756c}.ranking-toolbar input{width:260px;max-width:100%;border:1px solid #d7dbd5;border-radius:7px;padding:9px 11px;font:12px Inter,sans-serif;background:#fffefb;color:#17201d}.ranking-toolbar>span{font-size:11px;color:#7d857f;padding-bottom:9px}.ranking-card .board-wrap{margin-top:16px;border:1px solid #d7dbd5;border-radius:12px}.ranking-card .board{margin:0}.ranking-card .board tbody tr:last-child td{border-bottom:0}.ranking-card .board-note{margin:12px 0 0}.bar-card .note,.figure-caption{font-size:11px;line-height:1.7}
+@media(max-width:650px){.task-tabs{width:100%;margin-bottom:18px}.task-tabs button{padding:9px 8px;flex:1;font-size:11px}.task-content>h3{font-size:19px}.task-content>h3 span{font-size:14px}.bar-card,.pareto-card,.ranking-card{padding:18px 14px!important;border-radius:18px}.bar-scroll,.pareto-scroll{margin-left:-14px;margin-right:-14px;padding:0 14px}.ranking-toolbar{gap:12px;align-items:flex-start}.ranking-toolbar label{flex:1;min-width:0}.ranking-toolbar input{width:100%;box-sizing:border-box}.ranking-toolbar>span{font-size:10px;max-width:90px;padding-top:24px}.chart-tooltip{padding:12px;font-size:11px}.chart-tooltip dl{gap:4px 10px}.chart-tooltip dd{font-size:10px}.chart-tooltip strong{font-size:12px}}
+
+.chart-node{user-select:none;-webkit-user-select:none}.chart-tooltip dt{margin:0}

assets/chart-interactions.js

@@ -0,0 +1,26 @@
+// BuildingBench interaction: full model hit targets, a viewport tooltip, and quieting the other marks.
+const detailPromise=fetch(new URL('../data/leaderboard-details.json?v=20261001c',import.meta.url)).then(r=>{if(!r.ok)throw new Error('Leaderboard details unavailable');return r.json();});
+const tip=Object.assign(document.createElement('div'),{className:'chart-tooltip',id:'chart-tooltip'});tip.setAttribute('role','tooltip');document.body.append(tip);
+let active=null,pinned=false;
+function hide(){tip.classList.remove('on');active?.plot.querySelectorAll('.chart-node').forEach(n=>n.classList.remove('dim','hot'));active?.node.removeAttribute('aria-describedby');active=null;pinned=false;}
+function show(node,plot,record,anchorSelector){
+ if(active?.node!==node)hide();active={node,plot,record,anchorSelector};tip.replaceChildren();
+ const title=document.createElement('strong');title.textContent=record.name;tip.append(title);
+ const provider=document.createElement('span');provider.className='tooltip-provider';provider.textContent=record.provider;tip.append(provider);
+ const dl=document.createElement('dl');for(const m of record.metrics){const dt=document.createElement('dt'),dd=document.createElement('dd');dt.textContent=m.label;dd.textContent=(m.currency?'$':'')+String(m.value);dl.append(dt,dd);}tip.append(dl);
+ tip.classList.add('on');node.setAttribute('aria-describedby','chart-tooltip');plot.querySelectorAll('.chart-node').forEach(n=>{n.classList.toggle('dim',n!==node);n.classList.toggle('hot',n===node);});
+ const r=(node.querySelector(anchorSelector)||node).getBoundingClientRect(),w=tip.offsetWidth,h=tip.offsetHeight;
+ tip.style.left=Math.max(8,Math.min(innerWidth-w-8,r.left+r.width/2-w/2))+'px';
+ tip.style.top=Math.max(8,Math.min(innerHeight-h-8,r.top>h+14?r.top-h-12:r.bottom+12))+'px';
+}
+export async function bindChartTooltip(node,plot,key,mode,anchorSelector='.bar,.chip'){
+ const data=await detailPromise,record=data[mode].find(d=>d.key===key||d.name===key);if(!record)return;
+ node.classList.add('chart-node');node.setAttribute('tabindex','0');node.setAttribute('role','button');node.setAttribute('aria-label',record.name+'; '+record.metrics.map(m=>m.label+' '+(m.currency?'$':'')+m.value).join('; '));
+ node.addEventListener('pointerenter',()=>{pinned=false;show(node,plot,record,anchorSelector);});
+ node.addEventListener('pointerleave',()=>{if(!pinned&&active?.node===node)hide();});
+ node.addEventListener('focus',()=>show(node,plot,record,anchorSelector));node.addEventListener('blur',()=>{if(active?.node===node)hide();});
+ node.addEventListener('click',event=>{event.stopPropagation();show(node,plot,record,anchorSelector);pinned=true;});
+ node.addEventListener('keydown',event=>{if(event.key==='Escape')hide();if(event.key==='Enter'||event.key===' '){event.preventDefault();show(node,plot,record,anchorSelector);pinned=true;}});
+ node.dataset.interactive='true';
+}
+window.addEventListener('scroll',()=>{if(active&&document.activeElement===active.node){const a=active;requestAnimationFrame(()=>{if(active===a)show(a.node,a.plot,a.record,a.anchorSelector);});}else hide();},{passive:true,capture:true});window.addEventListener('resize',hide);document.addEventListener('click',event=>{if(!event.target.closest('.chart-node'))hide();});document.addEventListener('keydown',event=>{if(event.key==='Escape')hide();});

assets/leaderboard-bars.js

@@ -1,6 +1,7 @@
 // Bar layout and name wrapping adapted from BuildingBench figure-kit/bar-static/build.py.
 // Data is exclusively the existing Code4Scene data/site.js paper board; no reference benchmark scores.
 (async function(){
+const {bindChartTooltip}=await import("./chart-interactions.js?v=20261001c");
 await Promise.all([document.fonts.load('400 13px Inter'),document.fonts.load('700 13px Inter'),document.fonts.load('500 15.5px "IBM Plex Mono"')]);
 const ALL = {"overall": [{"name": "GPT-6 Astra (max)", "org": "OpenAI", "score": 0.6193352866666667, "colour": "#10A37F", "ink": "#ffffff", "label": "62", "new": false}, {"name": "Gemini 3.8 Flash (high)", "org": "Google", "score": 0.6189750266666667, "colour": "#7b1fa2", "ink": "#ffffff", "label": "62", "new": false}, {"name": "Claude Fable 5.1 (max)", "org": "Anthropic", "score": 0.60604898, "colour": "#D97757", "ink": "#ffffff", "label": "61", "new": false}, {"name": "Claude Opus 5 (max)", "org": "Anthropic", "score": 0.5931299933333334, "colour": "#D97757", "ink": "#ffffff", "label": "59", "new": false}, {"name": "GPT-5.6 Sol (high)", "org": "OpenAI", "score": 0.5499994666666667, "colour": "#10A37F", "ink": "#ffffff", "label": "55", "new": false}, {"name": "Muse Spark 1.3 (medium)", "org": "Meta", "score": 0.5022053666666666, "colour": "#42a5f5", "ink": "#111111", "label": "50", "new": false}, {"name": "GLM-5.3 Flash (max)", "org": "Z.ai", "score": 0.4147088666666666, "colour": "#96650b", "ink": "#ffffff", "label": "41", "new": false}, {"name": "Qwen 3.8 27B (thinking off)", "org": "Alibaba", "score": 0.37818169333333335, "colour": "#fe7016", "ink": "#111111", "label": "38", "new": false}, {"name": "Grok 4.6 (high)", "org": "xAI", "score": 0.37567506, "colour": "#111111", "ink": "#ffffff", "label": "38", "new": false}, {"name": "Qwen 3.8 27B (thinking on)", "org": "Alibaba", "score": 0.37094399333333333, "colour": "#fe7016", "ink": "#111111", "label": "37", "new": false}, {"name": "Inkling (high)", "org": "Thinking Machines", "score": 0.31150237333333336, "colour": "#686868", "ink": "#ffffff", "label": "31", "new": false}, {"name": "Gemma 4 31B (thinking on)", "org": "Google", "score": 0.29812257999999997, "colour": "#7b1fa2", "ink": "#ffffff", "label": "30", "new": false}, {"name": "Gemma 4 31B (thinking off)", "org": "Google", "score": 0.28498897333333334, "colour": "#7b1fa2", "ink": "#ffffff", "label": "28", "new": false}, {"name": "DeepSeek V4.1 Flash (high)", "org": "DeepSeek", "score": 0.22658958, "colour": "#3f51e0", "ink": "#ffffff", "label": "23", "new": false}], "t2s": [{"name": "Claude Fable 5.1 (max)", "org": "Anthropic", "score": 0.78775, "colour": "#D97757", "ink": "#ffffff", "label": "79", "new": false}, {"name": "GPT-6 Astra (max)", "org": "OpenAI", "score": 0.72382, "colour": "#10A37F", "ink": "#ffffff", "label": "72", "new": false}, {"name": "Claude Opus 5 (max)", "org": "Anthropic", "score": 0.7181599999999999, "colour": "#D97757", "ink": "#ffffff", "label": "72", "new": false}, {"name": "GPT-5.6 Sol (high)", "org": "OpenAI", "score": 0.70704, "colour": "#10A37F", "ink": "#ffffff", "label": "71", "new": false}, {"name": "Gemini 3.8 Flash (high)", "org": "Google", "score": 0.65689, "colour": "#7b1fa2", "ink": "#ffffff", "label": "66", "new": false}, {"name": "Muse Spark 1.3 (medium)", "org": "Meta", "score": 0.646195, "colour": "#42a5f5", "ink": "#111111", "label": "65", "new": false}, {"name": "Grok 4.6 (high)", "org": "xAI", "score": 0.56721, "colour": "#111111", "ink": "#ffffff", "label": "57", "new": false}, {"name": "Qwen 3.8 27B (thinking off)", "org": "Alibaba", "score": 0.55666, "colour": "#fe7016", "ink": "#111111", "label": "56", "new": false}, {"name": "Qwen 3.8 27B (thinking on)", "org": "Alibaba", "score": 0.51571, "colour": "#fe7016", "ink": "#111111", "label": "52", "new": false}, {"name": "GLM-5.3 Flash (max)", "org": "Z.ai", "score": 0.5094299999999999, "colour": "#96650b", "ink": "#ffffff", "label": "51", "new": false}, {"name": "Gemma 4 31B (thinking on)", "org": "Google", "score": 0.470705, "colour": "#7b1fa2", "ink": "#ffffff", "label": "47", "new": false}, {"name": "Gemma 4 31B (thinking off)", "org": "Google", "score": 0.45494, "colour": "#7b1fa2", "ink": "#ffffff", "label": "45", "new": false}, {"name": "Inkling (high)", "org": "Thinking Machines", "score": 0.42498500000000006, "colour": "#686868", "ink": "#ffffff", "label": "42", "new": false}, {"name": "DeepSeek V4.1 Flash (high)", "org": "DeepSeek", "score": 0.24269, "colour": "#3f51e0", "ink": "#ffffff", "label": "24", "new": false}], "i2s": [{"name": "Gemini 3.8 Flash (high)", "org": "Google", "score": 0.5810600533333334, "colour": "#7b1fa2", "ink": "#ffffff", "label": "58", "new": false}, {"name": "GPT-6 Astra (max)", "org": "OpenAI", "score": 0.5148505733333334, "colour": "#10A37F", "ink": "#ffffff", "label": "51", "new": false}, {"name": "Claude Opus 5 (max)", "org": "Anthropic", "score": 0.46809998666666675, "colour": "#D97757", "ink": "#ffffff", "label": "47", "new": false}, {"name": "Claude Fable 5.1 (max)", "org": "Anthropic", "score": 0.4243479600000001, "colour": "#D97757", "ink": "#ffffff", "label": "42", "new": false}, {"name": "GPT-5.6 Sol (high)", "org": "OpenAI", "score": 0.3929589333333333, "colour": "#10A37F", "ink": "#ffffff", "label": "39", "new": false}, {"name": "Muse Spark 1.3 (medium)", "org": "Meta", "score": 0.35821573333333334, "colour": "#42a5f5", "ink": "#111111", "label": "36", "new": false}, {"name": "GLM-5.3 Flash (max)", "org": "Z.ai", "score": 0.3199877333333333, "colour": "#96650b", "ink": "#ffffff", "label": "32", "new": false}, {"name": "Qwen 3.8 27B (thinking on)", "org": "Alibaba", "score": 0.2261779866666667, "colour": "#fe7016", "ink": "#111111", "label": "23", "new": false}, {"name": "DeepSeek V4.1 Flash (high)", "org": "DeepSeek", "score": 0.21048916, "colour": "#3f51e0", "ink": "#ffffff", "label": "21", "new": false}, {"name": "Qwen 3.8 27B (thinking off)", "org": "Alibaba", "score": 0.19970338666666668, "colour": "#fe7016", "ink": "#111111", "label": "20", "new": false}, {"name": "Inkling (high)", "org": "Thinking Machines", "score": 0.19801974666666666, "colour": "#686868", "ink": "#ffffff", "label": "20", "new": false}, {"name": "Grok 4.6 (high)", "org": "xAI", "score": 0.18414012, "colour": "#111111", "ink": "#ffffff", "label": "18", "new": false}, {"name": "Gemma 4 31B (thinking on)", "org": "Google", "score": 0.12554015999999998, "colour": "#7b1fa2", "ink": "#ffffff", "label": "13", "new": false}, {"name": "Gemma 4 31B (thinking off)", "org": "Google", "score": 0.11503794666666667, "colour": "#7b1fa2", "ink": "#ffffff", "label": "12", "new": false}]};
 const LOGOS = {"Anthropic": {"icon": "anthropic", "fill": "#141413", "viewBox": "0 0 24 24", "inner": "<path d=\"M13.827 3.52h3.603L24 20h-3.603l-6.57-16.48zm-7.258 0h3.767L16.906 20h-3.674l-1.343-3.461H5.017l-1.344 3.46H0L6.57 3.522zm4.132 9.959L8.453 7.687 6.205 13.48H10.7z\"></path>", "rule": "evenodd"}, "OpenAI": {"icon": "openai", "fill": "#141413", "viewBox": "0 0 24 24", "inner": "<path d=\"M9.205 8.658v-2.26c0-.19.072-.333.238-.428l4.543-2.616c.619-.357 1.356-.523 2.117-.523 2.854 0 4.662 2.212 4.662 4.566 0 .167 0 .357-.024.547l-4.71-2.759a.797.797 0 00-.856 0l-5.97 3.473zm10.609 8.8V12.06c0-.333-.143-.57-.429-.737l-5.97-3.473 1.95-1.118a.433.433 0 01.476 0l4.543 2.617c1.309.76 2.189 2.378 2.189 3.948 0 1.808-1.07 3.473-2.76 4.163zM7.802 12.703l-1.95-1.142c-.167-.095-.239-.238-.239-.428V5.899c0-2.545 1.95-4.472 4.591-4.472 1 0 1.927.333 2.712.928L8.23 5.067c-.285.166-.428.404-.428.737v6.898zM12 15.128l-2.795-1.57v-3.33L12 8.658l2.795 1.57v3.33L12 15.128zm1.796 7.23c-1 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00-.076-.1l-.014-.015a.596.596 0 00-.109-.084c-.003-.002-.005-.006-.01-.008L5.178 12.65a.587.587 0 00-.591 0l-2.554 1.483a.596.596 0 00-.297.516v2.965c0 .213.113.41.297.516l2.554 1.483.012.004a.618.618 0 00.267.074l.016.002h.007a.55.55 0 00.16-.026.584.584 0 00.129-.053l1.277-.742a1.597 1.597 0 012.398 1.393v1.482c0 .05.007.095.019.14l.007.028c.013.044.03.085.051.125l.01.016c.022.036.047.07.076.1l.014.015c.032.032.069.06.109.084l.01.008 2.554 1.483a.587.587 0 00.593 0l2.554-1.483a.596.596 0 00.296-.515v-2.966a.596.596 0 00-.296-.516h-.002z\" fill=\"#0294DE\"></path>", "rule": null}, "Fireworks": {"icon": "fireworks-color", "viewBox": "0 0 24 24", "inner": "<path clip-rule=\"evenodd\" d=\"M14.8 5l-2.801 6.795L9.195 5H7.397l3.072 7.428a1.64 1.64 0 003.038.002L16.598 5H14.8zm1.196 10.352l5.124-5.244-.699-1.669-5.596 5.739a1.664 1.664 0 00-.343 1.807 1.642 1.642 0 001.516 1.012L16 17l8-.02-.699-1.669-7.303.041h-.002zM2.88 10.104l.699-1.669 5.596 5.739c.468.479.603 1.189.343 1.807a1.643 1.643 0 01-1.516 1.012l-8-.018-.002.002.699-1.669 7.303.042-5.122-5.246z\" fill=\"#5019C5\" fill-rule=\"evenodd\"></path>", "rule": null}, "Stealth": {"wordmark": ["STEALTH"]}, "Thinking Machines": {"wordmark": ["THINKING", "MACHINES"]}, "Alibaba": {"wordmark": ["QWEN"]}};
@@ -22,10 +23,11 @@ const G = {                        // geometry, CSS px
   nameTol: 12,                     // splits this close to the most balanced count as ties
 };
 
+let current=null;
 function el(tag, attrs, parent) {
   const e = document.createElementNS(NS, tag);
   for (const k in attrs) e.setAttribute(k, attrs[k]);
-  (parent || svg).appendChild(e);
+  (parent || current || svg).appendChild(e);
   return e;
 }
 const ctx = document.createElement("canvas").getContext("2d");
@@ -87,9 +89,12 @@ function wrap2(name, font) {
     const cx = G.left + (i + 0.5) * pitch, x0 = cx - bwid / 2, x1 = cx + bwid / 2;
     const top = y(d.score * 100), r = Math.min(G.radius, bwid / 2);
     pos[d.name] = {cx, top, x0, x1};
-    const bar = el("path", {tabindex: 0, role: "img", "aria-label": `${d.name}: ${d.score.toFixed(3)}`, d: `M${x0},${G.base} V${top + r} Q${x0},${top} ${x0 + r},${top} H${x1 - r} ` +
+    current=el('g',{'class':'bar-node'},svg);
+    el('rect',{x:G.left+i*pitch,y:G.top,width:pitch,height:H-G.top,fill:'transparent','class':'bar-hit'});
+    bindChartTooltip(current,svg,d.name,key,'.bar');
+    const bar = el("path", {class:"bar", d: `M${x0},${G.base} V${top + r} Q${x0},${top} ${x0 + r},${top} H${x1 - r} ` +
                    `Q${x1},${top} ${x1},${top + r} V${G.base} Z`, fill: d.colour});
-    el("title", {}, bar).textContent = `${d.name}: ${d.score.toFixed(3)}`;
+
     const v = el("text", {x: cx, y: (top + G.base) / 2 + 5.4, "text-anchor": "middle",
                           "font-family": MONO, "font-weight": 500, "font-size": 15.5, fill: d.ink});
     v.textContent = d.label;
@@ -135,6 +140,6 @@ function wrap2(name, font) {
   });
 
 
-svg.dataset.ready='true';
+current=null;svg.dataset.ready='true';
 }
 })();

assets/leaderboard-controls.js

@@ -0,0 +1,3 @@
+const input=document.getElementById('model-search'),tables=[...document.querySelectorAll('table.board')];
+function filter(){let shown=0;for(const table of tables){let rank=0;for(const row of table.tBodies[0].rows){row.hidden=!row.dataset.search.includes(input.value.trim().toLowerCase());if(!row.hidden)row.cells[0].textContent=++rank;}shown=rank;}document.getElementById('ranking-count').textContent=shown+' of 14 configurations';}
+input.addEventListener('input',filter);tables.forEach(t=>t.querySelectorAll('th[data-k]').forEach(th=>th.addEventListener('click',filter)));

assets/pareto.js

@@ -1,3 +1,4 @@
+import {bindChartTooltip} from "./chart-interactions.js?v=20261001c";
 // Adapted from BuildingBench's figure-kit/pareto-frontier/render.py and live SVG.
 // Domain, costs and scores are exclusively Code4Scene's historical paper evaluation.
 const NS='http://www.w3.org/2000/svg';
@@ -35,10 +36,7 @@ for(const svg of document.querySelectorAll('.pareto-svg')){
   g.append(node('rect',{x:cx-5,y:cy-5,width:10,height:10,rx:1,fill:color,stroke:'#fffefb','stroke-width':1.7,class:'chip'}));
   g.append(node('text',{x:cx+best.dx,y:cy+best.dy,'text-anchor':best.anchor,fill:label,'font-size':font,'font-weight':isFront?700:400,class:'model-label'},name));
   g.append(node('circle',{cx,cy,r:14,fill:'transparent'}));
-  const tip=document.querySelector('#pareto-tooltip')||Object.assign(document.body.appendChild(document.createElement('div')),{id:'pareto-tooltip',className:'pareto-tooltip'});
-  const show=()=>{tip.replaceChildren();const title=document.createElement('strong');title.textContent=d.name;tip.append(title);for(const text of [`Score: ${d.score.toFixed(6)}`,`Mean cost / case: $${d.cost.toFixed(6)}`,isFront?'Pareto frontier':'Dominated configuration']){const p=document.createElement('div');p.textContent=text;tip.append(p);}const rect=g.querySelector('.chip').getBoundingClientRect();tip.classList.add('on');tip.style.left=Math.max(8,Math.min(innerWidth-tip.offsetWidth-8,rect.x+rect.width/2-tip.offsetWidth/2))+'px';tip.style.top=(rect.y<tip.offsetHeight+16?rect.bottom+12:rect.y-tip.offsetHeight-12)+'px';svg.querySelectorAll('.pareto-node').forEach(n=>n.classList.toggle('dim',n!==g));};
-  const hide=()=>{tip.classList.remove('on');svg.querySelectorAll('.pareto-node').forEach(n=>n.classList.remove('dim'));};
-  g.addEventListener('mouseenter',show);g.addEventListener('focus',show);g.addEventListener('click',show);g.addEventListener('mouseleave',hide);g.addEventListener('blur',hide);window.addEventListener('scroll',hide,{passive:true});
+  bindChartTooltip(g,svg,d.key,svg.dataset.mode,'.chip');
  }
  svg.dataset.ready='true';
 }

assets/scene-assets.js

@@ -0,0 +1,50 @@
+// A bounded, reference-counted queue. A shared scene has one job regardless of how many cards display it.
+export class AssetQueue {
+  constructor({load,dispose,maxConcurrent=2,maxIdle=1,maxBytes=128*1024*1024,onChange=()=>{}}){Object.assign(this,{load,dispose,maxConcurrent,maxIdle,maxBytes,onChange});this.entries=new Map();this.running=0;this.peakRunning=0;}
+  retain(key,listener,priority=()=>0){
+    let e=this.entries.get(key);
+    if(!e||e.state==='error'||e.state==='cancelled'){
+      e={key,users:new Set(),state:'queued',asset:null,controller:new AbortController(),last:Date.now(),bytes:0};this.entries.set(key,e);
+    }
+    const user={listener,priority};e.users.add(user);e.last=Date.now();queueMicrotask(()=>{if(e.users.has(user))listener(e);this.pump();});this.changed();
+    let released=false;
+    return {entry:e,release:()=>{if(released)return;released=true;e.users.delete(user);e.last=Date.now();if(!e.users.size&&!e.asset){e.state='cancelled';e.controller.abort();if(this.entries.get(key)===e)this.entries.delete(key);}this.evict();this.pump();this.changed();}};
+  }
+  notify(e,state,detail={}){if(e.controller.signal.aborted)return;Object.assign(e,detail,{state});for(const u of e.users)u.listener(e);this.changed();}
+  pump(){
+    while(this.running<this.maxConcurrent){const queued=[...this.entries.values()].filter(e=>e.state==='queued'&&e.users.size).sort((a,b)=>Math.min(...[...a.users].map(u=>u.priority()))-Math.min(...[...b.users].map(u=>u.priority())));if(!queued.length)break;const e=queued[0];e.state='loading';this.running++;this.peakRunning=Math.max(this.peakRunning,this.running);this.run(e);}
+  }
+  async run(e){
+    try{
+      let asset;
+      for(let attempt=0;attempt<2;attempt++){
+        try{asset=await this.load(e.key,e.controller.signal,(state,detail)=>this.notify(e,state,detail));break;}
+        catch(error){if(e.controller.signal.aborted)throw error;if(attempt===1)throw error;this.notify(e,'retrying');await new Promise(r=>setTimeout(r,800));}
+      }
+      if(e.controller.signal.aborted||!e.users.size){this.dispose(asset);return;}
+      e.asset=asset;e.bytes=asset.bytes||0;this.notify(e,'ready');
+    }catch(error){if(!e.controller.signal.aborted)this.notify(e,'error',{error});}
+    finally{this.running--;this.evict();this.pump();this.changed();}
+  }
+  evict(){
+    const idle=[...this.entries.values()].filter(e=>!e.users.size&&e.asset).sort((a,b)=>a.last-b.last);let total=[...this.entries.values()].reduce((n,e)=>n+e.bytes,0);
+    while(idle.length&&(idle.length>this.maxIdle||total>this.maxBytes)){const e=idle.shift();total-=e.bytes;this.dispose(e.asset);e.asset=null;if(this.entries.get(e.key)===e)this.entries.delete(e.key);}
+  }
+  changed(){this.onChange({running:this.running,peak:this.peakRunning,queued:[...this.entries.values()].filter(e=>e.state==='queued').length,cached:[...this.entries.values()].filter(e=>e.asset).length,bytes:[...this.entries.values()].reduce((n,e)=>n+e.bytes,0)});}
+}
+
+// A stalled body must not leave a loading card forever. Idle and total limits cover headers and streamed bytes.
+export async function fetchSceneBytes(url,signal,progress,{idleMs=20000,totalMs=90000,fetcher=fetch}={}){
+  const abort=new AbortController();let idle,total,reason='';
+  const stop=()=>abort.abort();signal.addEventListener('abort',stop,{once:true});if(signal.aborted)stop();
+  const reset=()=>{clearTimeout(idle);idle=setTimeout(()=>{reason='The scene download stopped responding.';abort.abort();},idleMs);};
+  reset();total=setTimeout(()=>{reason='The scene download took too long.';abort.abort();},totalMs);
+  try{
+    const response=await fetcher(url,{signal:abort.signal});if(!response.ok)throw new Error('Scene request failed (HTTP '+response.status+').');
+    const size=Number(response.headers.get('content-length'))||0,reader=response.body.getReader(),chunks=[];let received=0,last=0;
+    for(;;){const {done,value}=await reader.read();if(done)break;reset();chunks.push(value);received+=value.length;if(Date.now()-last>120){progress({received,total:size});last=Date.now();}}
+    if(!received||size&&received!==size)throw new Error('The scene download was incomplete.');
+    progress({received,total:size});const bytes=new Uint8Array(received);let at=0;for(const c of chunks){bytes.set(c,at);at+=c.length;}return bytes;
+  }catch(error){if(reason)throw new Error(reason);throw error;}
+  finally{clearTimeout(idle);clearTimeout(total);signal.removeEventListener('abort',stop);}
+}

assets/scene-cards.js

@@ -1,4 +1,5 @@
 import * as THREE from "three";
+import {AssetQueue,fetchSceneBytes} from "./scene-assets.js?v=20261001c";
 import {GLTFLoader} from "three/addons/loaders/GLTFLoader.js";
 import {MeshoptDecoder} from "three/addons/libs/meshopt_decoder.module.js";
 import {Sky} from "three/addons/objects/Sky.js";
@@ -9,9 +10,7 @@ import {Sky} from "three/addons/objects/Sky.js";
 // procedural viewer had (rotationX / rotationY / zoom / paused / group /
 // draw(dt) / destroy()), so the page code above it did not have to change.
 //
-// Every mesh drawn here is the building.glb an agent handed in to the
-// benchmark, re-encoded for the page (textures at most 512 px, JPEG for
-// opaque maps) and gzipped. Geometry is untouched.
+// Existing public Code4Scene packed GLBs. The decoder preserves their original geometry and textures.
 (function () {
   const ADD = {GLTFLoader};
   const activeViewers = new Set();
@@ -19,20 +18,40 @@ import {Sky} from "three/addons/objects/Sky.js";
   let lastFrame = performance.now();
 
   /* ------------------------------------------------------------ renderer */
-  let gl = null, ENV = null;
+  let gl = null, ENV = null, contextLost = false, restoreTimer = null;
   function renderer() {
     if (gl) return gl;
     gl = new THREE.WebGLRenderer({ antialias: true, alpha: true, premultipliedAlpha: true, powerPreference: "high-performance" });
     gl.setPixelRatio(1);
+    gl.domElement.addEventListener('webglcontextlost',event=>{
+      event.preventDefault();contextLost=true;
+      activeViewers.forEach(v=>{if(v.visible)v.status('Restoring 3D graphics…','restoring');});
+      clearTimeout(restoreTimer);restoreTimer=setTimeout(()=>activeViewers.forEach(v=>{if(v.visible)v.fail(new Error('3D graphics were interrupted.'),'graphics');}),10000);
+    });
+    gl.domElement.addEventListener('webglcontextrestored',()=>{
+      clearTimeout(restoreTimer);contextLost=false;
+      try{makeEnvironment();for(const e of assets.entries.values())if(e.asset)e.asset.scene.environment=ENV;activeViewers.forEach(v=>{v.dirty=true;v.hasDrawn=false;});}
+      catch(error){activeViewers.forEach(v=>v.fail(error,'graphics'));}
+    });
     gl.outputColorSpace = THREE.SRGBColorSpace;
     gl.toneMapping = THREE.ACESFilmicToneMapping; gl.toneMappingExposure = 1.0;
     gl.shadowMap.enabled = true;
     gl.shadowMap.type = THREE.PCFSoftShadowMap;
     gl.setClearColor(0x000000, 0);
-    const sky=new Sky();sky.scale.setScalar(1000);const u=sky.material.uniforms;u.turbidity.value=4;u.rayleigh.value=1.4;u.mieCoefficient.value=.004;u.mieDirectionalG.value=.8;u.sunPosition.value.setFromSphericalCoords(1,THREE.MathUtils.degToRad(52),THREE.MathUtils.degToRad(215));const skyScene=new THREE.Scene();skyScene.add(sky);ENV=new THREE.PMREMGenerator(gl).fromScene(skyScene,0,.1,2000).texture;
+    makeEnvironment();
     return gl;
   }
 
+  function makeEnvironment(){
+    ENV?.dispose();
+    const sky=new Sky();sky.scale.setScalar(1000);const u=sky.material.uniforms;u.turbidity.value=4;u.rayleigh.value=1.4;u.mieCoefficient.value=.004;u.mieDirectionalG.value=.8;u.sunPosition.value.setFromSphericalCoords(1,THREE.MathUtils.degToRad(52),THREE.MathUtils.degToRad(215));const skyScene=new THREE.Scene();skyScene.add(sky);const pmrem=new THREE.PMREMGenerator(gl);ENV=pmrem.fromScene(skyScene,0,.1,2000).texture;pmrem.dispose();sky.geometry.dispose();sky.material.dispose();
+  }
+  function recoverRenderer(){
+    clearTimeout(restoreTimer);contextLost=false;
+    if(gl){gl.dispose();gl=null;}ENV?.dispose();ENV=null;renderer();
+    for(const e of assets.entries.values())if(e.asset)e.asset.scene.environment=ENV;
+    activeViewers.forEach(v=>{v.dirty=true;v.hasDrawn=false;v.failed=null;});
+  }
   // The benchmark's own light rig (city_bench.building_light/1), the numbers
   // the board's renders use: sun in the south-east at 50 degrees, a pale sky,
   // and a muted environment. One rig for the page, moved into whichever scene
@@ -68,30 +87,42 @@ import {Sky} from "three/addons/objects/Sky.js";
     asset.scene.add(RIG_GROUP);
   }
 
-  /* -------------------------------------------------------------- assets */
-  // BB_ASSETS maps a key to either a gzipped-base64 glb (the self-contained
-  // page) or an assets/… path (the split copy for hosting). Same bytes, one
-  // fetch earlier.
-  const ASSETS = window.BB_ASSETS || {};
-  const cache = new Map();       // key -> {promise, asset, refs, last}
-  const loader = new ADD.GLTFLoader().setMeshoptDecoder(MeshoptDecoder);
-  const gunzip = buf => new Response(new Blob([buf]).stream().pipeThrough(new DecompressionStream("gzip"))).arrayBuffer();
-  const PACK_KEY = Uint8Array.from("5c2f9e71d3a84b06e1f7c29a38d05b64a7193ce8f2046db95e81c73a2df6904b".match(/../g), h => parseInt(h,16));
-  async function bytesFor(key) {
-    const r = await fetch(key); if (!r.ok) throw new Error("HTTP " + r.status);
-    const a = new Uint8Array(await r.arrayBuffer());
-    for (let i=0;i<a.length;i++) a[i] ^= PACK_KEY[i&31] ^ (((i>>>5)*131)&255);
-    return a.buffer;
+  const PACK_KEY=Uint8Array.from("5c2f9e71d3a84b06e1f7c29a38d05b64a7193ce8f2046db95e81c73a2df6904b".match(/../g),h=>parseInt(h,16));
+  function disposeAsset(asset){
+    if(!asset)return;asset.scene.remove(RIG_GROUP);const geometries=new Set(),materials=new Set(),textures=new Set();
+    asset.scene.traverse(n=>{if(n.geometry)geometries.add(n.geometry);for(const m of [].concat(n.material||[])){materials.add(m);for(const v of Object.values(m))if(v?.isTexture)textures.add(v);}});
+    geometries.forEach(g=>g.dispose());textures.forEach(t=>{t.dispose();t.source?.data?.close?.();});materials.forEach(m=>m.dispose());
+  }
+  function assetProfile(root){
+    const buffers=new Set(),images=new Set();let geometry=0,textures=0,maxTexture=0;
+    root.traverse(n=>{if(n.geometry){for(const a of [...Object.values(n.geometry.attributes),n.geometry.index].filter(Boolean)){const buffer=(a.array||a.data?.array)?.buffer;if(buffer&&!buffers.has(buffer)){buffers.add(buffer);geometry+=buffer.byteLength;}}}for(const m of [].concat(n.material||[]))for(const t of Object.values(m))if(t?.isTexture){const image=t.source?.data;if(image&&!images.has(image)){images.add(image);textures+=(image.width||0)*(image.height||0)*4*1.34;maxTexture=Math.max(maxTexture,image.width||0,image.height||0);}}});
+    return {geometry,textures,maxTexture,bytes:geometry+textures};
+  }
+
+  // Cards never need full-resolution scene textures. Bound their decoded/GPU footprint,
+  // while the original public files and full case inspector retain their original texture resolution.
+  async function cardTextures(root,signal){
+    const images=new Map(),textures=new Set();root.traverse(n=>{for(const m of [].concat(n.material||[]))for(const t of Object.values(m))if(t?.isTexture)textures.add(t);});
+    for(const t of textures){const image=t.source?.data;if(!image||Math.max(image.width||0,image.height||0)<=512)continue;
+      if(signal.aborted)throw new DOMException('Scene no longer visible','AbortError');
+      if(!images.has(image)){const scale=512/Math.max(image.width,image.height);images.set(image,await createImageBitmap(image,{resizeWidth:Math.max(1,Math.round(image.width*scale)),resizeHeight:Math.max(1,Math.round(image.height*scale)),resizeQuality:'high',colorSpaceConversion:'none',premultiplyAlpha:'none'}));}
+      t.image=images.get(image);t.needsUpdate=true;
+    }
+    for(const original of images.keys())original.close?.();
   }
-  function parse(buf) { return new Promise((resolve, reject) => loader.parse(buf, "", resolve, reject)); }
-  function acquire(key) {
-    let entry = cache.get(key);
-    if (!entry) {
-      entry = { refs: 0, last: performance.now(), asset: null };
-      // A dropped connection is not a bad file: one retry, and a failure leaves
-      // the cache so the next mount can try again.
-      const attempt = () => bytesFor(key).then(parse);
-      entry.promise = attempt().catch(() => new Promise(r => setTimeout(r, 1500)).then(attempt)).then(gltf => {
+  const assets=new AssetQueue({
+    maxConcurrent:2,maxIdle:1,maxBytes:128*1024*1024,dispose:disposeAsset,
+    onChange:s=>{document.documentElement.dataset.sceneJobs=String(s.running);document.documentElement.dataset.scenePeakJobs=String(s.peak);document.documentElement.dataset.sceneCached=String(s.cached);document.documentElement.dataset.sceneBytes=String(Math.round(s.bytes));},
+    load:async(key,signal,progress)=>{
+      progress('downloading',{received:0,total:0});const bytes=await fetchSceneBytes(key,signal,p=>progress('downloading',p));
+      for(let i=0;i<bytes.length;i++)bytes[i]^=PACK_KEY[i&31]^(((i>>>5)*131)&255);
+      if(new DataView(bytes.buffer).getUint32(0,true)!==0x46546c67)throw new Error('The scene file is invalid.');
+      if(signal.aborted)throw new DOMException('Scene no longer visible','AbortError');
+      progress('decoding');const gltf=await new Promise((resolve,reject)=>{
+        let done=false;const timer=setTimeout(()=>{done=true;reject(new Error('The scene could not be decoded in time.'));},30000);
+        new GLTFLoader().setMeshoptDecoder(MeshoptDecoder).parse(bytes.buffer,'',g=>{clearTimeout(timer);if(done||signal.aborted){const fake={scene:g.scene,root:g.scene};disposeAsset(fake);if(!done)reject(new DOMException('Scene no longer visible','AbortError'));return;}done=true;resolve(g);},error=>{clearTimeout(timer);if(!done){done=true;reject(error);}});
+      });
+        try{await cardTextures(gltf.scene,signal);}catch(error){disposeAsset({scene:gltf.scene,root:gltf.scene});throw error;}
         const root = gltf.scene;
         root.traverse(node => { if (node.isMesh) { node.castShadow = true; node.receiveShadow = true; } });
         const box = new THREE.Box3(), pts=[];
@@ -108,38 +139,16 @@ import {Sky} from "three/addons/objects/Sky.js";
         scene.background = new THREE.Color(0xe6edf0); scene.add(root);
         const task=window.SITE.cases.find(c=>c.track==='i2s'&&(c.input_glb===key||c.gt_glb===key||c.agents.some(a=>a.glb===key)));
         if(task){root.updateMatrixWorld(true);root.traverse(o=>{const duplicate=(task.duplicates||[]).includes(o.name);if(!duplicate&&!(task.targets||[]).includes(o.name))return;const b=new THREE.Box3().setFromObject(o);if(b.isEmpty())return;const h=new THREE.Box3Helper(b.expandByScalar(.08),duplicate?0xff6b5e:0x5ee08a);h.material.depthTest=false;h.material.transparent=true;h.renderOrder=999;scene.add(h);});}
-        entry.asset = { key, root, scene, box, centre, corners, radius: Math.max(size.length() / 2, 1), floor: box.min.y };
-        return entry.asset;
-      });
-      entry.promise.catch(() => { if (cache.get(key) === entry) cache.delete(key); });
-      cache.set(key, entry);
+      return {key,root,scene,box,centre,corners,radius:Math.max(size.length()/2,1),floor:box.min.y,...assetProfile(root)};
     }
-    entry.refs++; entry.last = performance.now();
-    return entry;
-  }
-  function release(entry) { if (!entry) return; entry.refs = Math.max(0, entry.refs - 1); entry.last = performance.now(); evict(); }
-  const KEEP = 40;
-  function evict() {
-    const idle = [...cache.values()].filter(e => e.refs === 0 && e.asset);
-    if (cache.size <= KEEP) return;
-    idle.sort((a, b) => a.last - b.last);
-    for (const e of idle) {
-      if (cache.size <= KEEP) break;
-      e.asset.root.traverse(n => {
-        if (!n.isMesh) return;
-        n.geometry?.dispose();
-        for (const m of [].concat(n.material || [])) { for (const s of ["map", "normalMap", "roughnessMap", "metalnessMap", "emissiveMap", "aoMap", "alphaMap"]) m[s]?.dispose(); m.dispose(); }
-      });
-      cache.delete(e.asset.key);
-    }
-  }
+  });
 
   /* -------------------------------------------------------------- viewer */
   const clamp = (v, a, b) => Math.min(b, Math.max(a, v));
   const reduced = () => window.matchMedia("(prefers-reduced-motion: reduce)").matches;
   class Viewer {
     constructor(canvas, options = {}) {
-      this.canvas = canvas;
+      this.canvas = canvas; this.element=canvas.closest(".live-scene");this.visible=false;this.dirty=true;this.handle=null;this.key=null;this.generation=0;
       this.ctx = canvas.getContext("2d", { alpha: true });
       this.rotationY = options.rotationY ?? -0.65;
       this.rotationX = options.rotationX ?? 0.35;
@@ -154,30 +163,50 @@ import {Sky} from "three/addons/objects/Sky.js";
       this.entry = null; this.asset = null;
       this.bind();
       activeViewers.add(this);
-      if (options.assetKey) this.load(options.assetKey);
+      if (options.assetKey) this.key=options.assetKey;
+    }
+    status(text,state){
+      this.element.dataset.statePhase=state;this.canvas.dataset.rendered='false';
+      let box=this.element.querySelector('.scene-loading');if(!box){box=document.createElement('div');box.className='scene-loading';box.setAttribute('role','status');this.element.append(box);}
+      if(box.textContent!==text)box.textContent=text;
+    }
+    fail(error,kind='asset'){
+      if(!this.visible)return;this.failed=error;this.failureKind=kind;this.status(kind==='graphics'?'3D graphics were interrupted.':'Could not load this scene.','error');
+      const box=this.element.querySelector('.scene-loading');box.title=error?.message||'';
+      const retry=document.createElement('button');retry.className='scene-retry';retry.textContent='Retry scene';retry.onclick=()=>{this.failed=null;if(this.failureKind==='graphics'){try{recoverRenderer();this.status('Preparing 3D scene…','decoding');}catch(e){this.fail(e,'graphics');}}else this.load(this.key);};box.append(retry);
+    }
+    load(key){
+      this.key=key;this.generation++;this.handle?.release();this.handle=null;this.asset=null;this.failed=null;this.hasDrawn=false;this.dirty=true;
+      if(!this.visible)return;
+      const generation=this.generation;this.status('Waiting for a download slot…','queued');
+      this.handle=assets.retain(key,entry=>{
+        if(this.destroyed||!this.visible||generation!==this.generation)return;
+        if(entry.state==='ready'){this.asset=entry.asset;this.element.dataset.sceneMb=(entry.bytes/1048576).toFixed(1);this.element.dataset.sceneGeometryMb=(entry.asset.geometry/1048576).toFixed(1);this.element.dataset.sceneTextureMb=(entry.asset.textures/1048576).toFixed(1);this.element.dataset.sceneMaxTexture=String(entry.asset.maxTexture);this.hasDrawn=false;this.dirty=true;this.status('Preparing 3D scene…','rendering');}
+        else if(entry.state==='error')this.fail(entry.error);
+        else if(entry.state==='downloading'){const text=entry.total?Math.min(100,Math.round(entry.received/entry.total*100))+'%':(entry.received/1048576).toFixed(1)+' MB';this.status('Downloading scene · '+text,'downloading');}
+        else if(entry.state==='decoding')this.status('Preparing scene geometry…','decoding');
+        else if(entry.state==='retrying')this.status('Connection interrupted · retrying…','retrying');
+      },()=>Math.abs(this.canvas.getBoundingClientRect().top));
     }
-    load(key) {
-      release(this.entry);
-      this.entry = acquire(key); this.asset = null; this.failed = null;
-      const entry = this.entry;
-      entry.promise.then(asset => { if (this.entry === entry && !this.destroyed) { this.asset = asset; this.hasDrawn = false; } },
-                         err => { if (this.entry === entry) { this.failed = err; console.error("Code4Scene: submission failed to load", key, err); } });
-      return entry.promise;
+    setVisible(visible){
+      if(this.visible===visible)return;this.visible=visible;
+      if(visible){this.load(this.key);}
+      else{this.generation++;this.handle?.release();this.handle=null;this.asset=null;this.element.dataset.statePhase='paused';}
     }
     bind() {
       this.onDown = e => { this.paused = true; this.dragging = true; this.lastPointer = [e.clientX, e.clientY]; this.canvas.setPointerCapture?.(e.pointerId); };
-      this.onMove = e => { if (!this.dragging) return; const dx = e.clientX - this.lastPointer[0], dy = e.clientY - this.lastPointer[1]; this.rotationY += dx * .012; this.rotationX = clamp(this.rotationX + dy * .008, -.05, 1.3); this.lastPointer = [e.clientX, e.clientY]; if (this.group) { this.group.rotationX = this.rotationX; this.group.rotationY = this.rotationY; } };
+      this.onMove = e => { if (!this.dragging) return; this.dirty=true; const dx = e.clientX - this.lastPointer[0], dy = e.clientY - this.lastPointer[1]; this.rotationY += dx * .012; this.rotationX = clamp(this.rotationX + dy * .008, -.05, 1.3); this.lastPointer = [e.clientX, e.clientY]; if (this.group) { this.group.rotationX = this.rotationX; this.group.rotationY = this.rotationY; } };
       this.onUp = () => { this.dragging = false; this.lastPointer = null; };
-      this.onWheel = e => { e.preventDefault(); this.zoom = clamp(this.zoom - e.deltaY * .0007, .6, 2.2); if (this.group) this.group.zoom = this.zoom; };
-      this.onKey = e => { const keys = ["ArrowLeft", "ArrowRight", "ArrowUp", "ArrowDown", "+", "=", "-"]; if (!keys.includes(e.key)) return; e.preventDefault(); this.paused = true; if (e.key === "ArrowLeft") this.rotationY -= .12; if (e.key === "ArrowRight") this.rotationY += .12; if (e.key === "ArrowUp") this.rotationX = clamp(this.rotationX + .1, -.05, 1.3); if (e.key === "ArrowDown") this.rotationX = clamp(this.rotationX - .1, -.05, 1.3); if (e.key === "+" || e.key === "=") this.zoom = clamp(this.zoom + .08, .6, 2.2); if (e.key === "-") this.zoom = clamp(this.zoom - .08, .6, 2.2); if (this.group) Object.assign(this.group, { rotationX: this.rotationX, rotationY: this.rotationY, zoom: this.zoom, paused: true }); };
+      this.onWheel = e => { e.preventDefault();this.dirty=true; this.zoom = clamp(this.zoom - e.deltaY * .0007, .6, 2.2); if (this.group) this.group.zoom = this.zoom; };
+      this.onKey = e => { const keys = ["ArrowLeft", "ArrowRight", "ArrowUp", "ArrowDown", "+", "=", "-"]; if (!keys.includes(e.key)) return; e.preventDefault(); this.dirty=true; this.paused = true; if (e.key === "ArrowLeft") this.rotationY -= .12; if (e.key === "ArrowRight") this.rotationY += .12; if (e.key === "ArrowUp") this.rotationX = clamp(this.rotationX + .1, -.05, 1.3); if (e.key === "ArrowDown") this.rotationX = clamp(this.rotationX - .1, -.05, 1.3); if (e.key === "+" || e.key === "=") this.zoom = clamp(this.zoom + .08, .6, 2.2); if (e.key === "-") this.zoom = clamp(this.zoom - .08, .6, 2.2); if (this.group) Object.assign(this.group, { rotationX: this.rotationX, rotationY: this.rotationY, zoom: this.zoom, paused: true }); };
       this.canvas.addEventListener("wheel", this.onWheel, { passive: false }); this.canvas.addEventListener("keydown", this.onKey);
       this.canvas.addEventListener("pointerdown", this.onDown); this.canvas.addEventListener("pointermove", this.onMove); this.canvas.addEventListener("pointerup", this.onUp); this.canvas.addEventListener("pointercancel", this.onUp);
     }
     resize() {
       const rect = this.canvas.getBoundingClientRect();
-      const dpr = Math.min(window.devicePixelRatio || 1, 2);
+      const dpr = Math.min(window.devicePixelRatio || 1, 1.5, 960/Math.max(1,rect.width),600/Math.max(1,rect.height));
       const w = Math.max(1, Math.round(rect.width * dpr)), h = Math.max(1, Math.round(rect.height * dpr));
-      if (this.canvas.width !== w || this.canvas.height !== h) { this.canvas.width = w; this.canvas.height = h; }
+      if (this.canvas.width !== w || this.canvas.height !== h) { this.canvas.width = w; this.canvas.height = h;this.dirty=true; }
       this.w = rect.width; this.h = rect.height; this.dpr = dpr;
     }
     // Orbit the model's centre. The distance is fitted to the bounding box
@@ -210,11 +239,12 @@ import {Sky} from "three/addons/objects/Sky.js";
       cam.up.set(0, 1, 0); cam.lookAt(target); cam.updateProjectionMatrix();
     }
     draw(dt) {
-      if (this.destroyed || !this.canvas.isConnected) return;
+      if (this.destroyed || !this.visible || !this.canvas.isConnected || contextLost || this.failed) return;
       const rect = this.canvas.getBoundingClientRect();
       if (rect.width < 2 || rect.height < 2 || document.hidden) return;
       if (rect.bottom < 0 || rect.top > window.innerHeight) return;
       this.resize();
+      if(this.hasDrawn&&!this.dirty&&(this.paused||reduced()))return;
       if (this.group) { this.rotationX = this.group.rotationX; this.rotationY = this.group.rotationY; this.zoom = this.group.zoom; }
       if (!this.group && !this.paused && !this.dragging && !reduced()) this.rotationY += this.speed * dt;
       const ctx = this.ctx, W = this.canvas.width, H = this.canvas.height;
@@ -225,23 +255,23 @@ import {Sky} from "three/addons/objects/Sky.js";
         return;
       }
       const g = renderer();
-      g.setSize(W, H, false);
+      if(g.domElement.width!==W||g.domElement.height!==H)g.setSize(W,H,false);
       this.aim();
       rigFor(this.asset);
       g.render(this.asset.scene, this.camera);
       ctx.clearRect(0, 0, W, H);
       ctx.drawImage(g.domElement, 0, 0, W, H, 0, 0, W, H);
-      this.hasDrawn = true; this.canvas.dataset.rendered="true"; this.canvas.parentElement.querySelector(".scene-loading")?.remove();
+      this.hasDrawn = true; this.dirty=false;this.element.dataset.statePhase="ready"; this.canvas.dataset.rendered="true"; this.canvas.parentElement.querySelector(".scene-loading")?.remove();
     }
     destroy() {
       this.destroyed = true; activeViewers.delete(this);
-      release(this.entry); this.entry = null; this.asset = null;
+      this.handle?.release(); this.handle=null;this.asset=null;
       this.canvas.removeEventListener("pointerdown", this.onDown); this.canvas.removeEventListener("pointermove", this.onMove); this.canvas.removeEventListener("pointerup", this.onUp); this.canvas.removeEventListener("pointercancel", this.onUp); this.canvas.removeEventListener("wheel", this.onWheel); this.canvas.removeEventListener("keydown", this.onKey);
     }
   }
   window.GLBViewer = Viewer;
   window.destroyViewersWithin = root => { activeViewers.forEach(v => { if (root.contains(v.canvas)) v.destroy(); }); };
-  window.BB_ENGINE = { cache, renderer, preload: key => acquire(key).promise.then(a => (release(cache.get(key)), a)) };
+  window.BB_ENGINE = { renderer };
 
   /* ------------------------------------------------------------- the clock */
   function loop(now) {
@@ -250,27 +280,26 @@ import {Sky} from "three/addons/objects/Sky.js";
     const dt = Math.min(.05, (now - lastFrame) / 1000); lastFrame = now;
     const groups = new Set([...activeViewers].filter(v => v.group && !v.destroyed).map(v => v.group));
     if (!document.hidden && !reduced()) groups.forEach(g => { if (!g.paused && ![...activeViewers].some(v => v.group === g && v.dragging)) g.rotationY += dt * .14; });
-    activeViewers.forEach(v => { try { v.draw(dt); } catch (err) { v.failed = err; v.asset = null; console.error('Code4Scene: viewer draw failed', err); } });
+    activeViewers.forEach(v => { try { v.draw(dt); } catch (err) { v.fail(err,'graphics');console.error('Code4Scene: viewer draw failed',err); } });
   }
   requestAnimationFrame(loop);
 })();
 
 
-// Mount only near the viewport; repeated appearances share one decoded asset and WebGL renderer.
-const observer=new IntersectionObserver(entries=>entries.forEach(entry=>{
- if(!entry.isIntersecting)return;observer.unobserve(entry.target);
- const el=entry.target,c=window.SITE.cases.find(c=>c.id===el.dataset.case),a=c.agents.find(a=>a.key===el.dataset.agent);
- const viewer=new window.GLBViewer(el.querySelector('canvas'),{assetKey:a.glb,refCam:c.ref_cam,rotationX:.55,rotationY:-.62,speed:.1});
- const loading=el.querySelector('.scene-loading');viewer.entry.promise.catch(()=>{if(loading)loading.textContent='Scene unavailable — open the case to retry.';});
- const pause=el.querySelector('.scene-motion');if(c.ref_cam){pause.textContent='▶';pause.setAttribute('aria-label','Resume scene rotation');}
- pause.addEventListener('click',()=>{viewer.paused=!viewer.paused;pause.textContent=viewer.paused?'▶':'Ⅱ';pause.setAttribute('aria-label',viewer.paused?'Resume scene rotation':'Pause scene rotation');});
- el.querySelector('canvas').addEventListener('pointerdown',()=>{pause.textContent='▶';pause.setAttribute('aria-label','Resume scene rotation');});
- el.parentElement.querySelectorAll('.scene-versions button').forEach(b=>b.addEventListener('click',()=>{
-  const url=b.dataset.state==='input'?c.input_glb:b.dataset.state==='gt'?c.gt_glb:a.glb;
-  el.parentElement.querySelectorAll('.scene-versions button').forEach(x=>x.classList.toggle('on',x===b));
-  const status=document.createElement('span');status.className='scene-loading';status.setAttribute('role','status');status.textContent='Loading '+b.textContent.toLowerCase()+'…';el.querySelector('.scene-loading')?.remove();el.append(status);
-  el.querySelector('canvas').dataset.rendered='false';el.querySelector('.scene-hint').textContent=b.textContent+' · Drag to orbit';
-  viewer.load(url).catch(()=>status.textContent='Scene unavailable — open the case to retry.');el.dataset.state=b.dataset.state;
- }));
-}),{rootMargin:'180px'});
+// Visibility owns the asset subscription; hidden task panels and offscreen cards release resources.
+const viewers=new Map();
+function syncMotion(viewer,button){button.textContent=viewer.paused?'▶':'Ⅱ';button.setAttribute('aria-label',viewer.paused?'Resume scene rotation':'Pause scene rotation');}
+function mount(el){
+ const c=window.SITE.cases.find(c=>c.id===el.dataset.case),a=c.agents.find(a=>a.key===el.dataset.agent);
+ const url=state=>state==='input'?c.input_glb:state==='gt'?c.gt_glb:a.glb;
+ const viewer=new window.GLBViewer(el.querySelector('canvas'),{assetKey:url(el.dataset.state||'repair'),refCam:c.ref_cam,rotationX:.55,rotationY:-.62,speed:.1});viewers.set(el,viewer);
+ const pause=el.querySelector('.scene-motion');syncMotion(viewer,pause);pause.addEventListener('click',()=>{viewer.paused=!viewer.paused;viewer.dirty=true;syncMotion(viewer,pause);});
+ el.querySelector('canvas').addEventListener('pointerdown',()=>syncMotion(viewer,pause));
+ el.parentElement.querySelectorAll(':scope > .scene-versions button').forEach(b=>b.addEventListener('click',()=>{
+  const state=b.dataset.state;el.dataset.state=state;el.parentElement.querySelectorAll(':scope > .scene-versions button').forEach(x=>{x.classList.toggle('on',x===b);x.setAttribute('aria-pressed',String(x===b));});
+  el.querySelector('.scene-hint').textContent=b.textContent+' · Drag to orbit';viewer.load(url(state));
+ }));return viewer;
+}
+const observer=new IntersectionObserver(entries=>entries.forEach(({target,isIntersecting})=>{const viewer=viewers.get(target)||mount(target);viewer.setVisible(isIntersecting&&!target.closest('[hidden]'));}),{rootMargin:'40px',threshold:0});
 document.querySelectorAll('.live-scene').forEach(el=>observer.observe(el));
+document.addEventListener('taskchange',()=>{for(const[el,v]of viewers){if(el.closest('[hidden]'))v.setVisible(false);else{const r=el.getBoundingClientRect();v.setVisible(r.width>0&&r.bottom>0&&r.top<innerHeight+40);}}});

assets/task-tabs.js

@@ -0,0 +1,6 @@
+const tabs=[...document.querySelectorAll('.task-tabs [role=tab]')];
+function select(tab){
+ for(const b of tabs){const on=b===tab;b.setAttribute('aria-selected',String(on));b.tabIndex=on?0:-1;document.getElementById(b.getAttribute('aria-controls')).hidden=!on;}
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+}
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data/leaderboard-details.json

@@ -0,0 +1,1352 @@
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+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.37954258,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 3.3217229090909095,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "opus",
+      "name": "Claude Opus 5 (max)",
+      "provider": "Anthropic",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.46809998666666675,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.389,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.786,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.61843384,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.39293306,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 4.459671546394558,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "fable",
+      "name": "Claude Fable 5.1 (max)",
+      "provider": "Anthropic",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.4243479600000001,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.332,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.795,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.53523332,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.36890528000000006,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 3.0888859328063245,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "sol",
+      "name": "GPT-5.6 Sol (high)",
+      "provider": "OpenAI",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.3929589333333333,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.319,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.689,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.49742972,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.34072354,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 1.8773877185185188,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "muse",
+      "name": "Muse Spark 1.3 (medium)",
+      "provider": "Meta",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.35821573333333334,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.246,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.807,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.63253332,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.22105694,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 0.07172788461538461,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "glm",
+      "name": "GLM-5.3 Flash (max)",
+      "provider": "Z.ai",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.3199877333333333,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.188,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.848,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.46533411999999996,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.24731454,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 0.09209057222222222,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "qwen-on",
+      "name": "Qwen 3.8 27B (thinking on)",
+      "provider": "Alibaba",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.2261779866666667,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.118,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.66,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.29651112,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.19101142,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 0.2605628115151515,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "deepseek",
+      "name": "DeepSeek V4.1 Flash (high)",
+      "provider": "DeepSeek",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.21048916,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.066,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.787,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.18933412,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.22106668,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 0.054194520202020195,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "qwen-off",
+      "name": "Qwen 3.8 27B (thinking off)",
+      "provider": "Alibaba",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.19970338666666668,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.083,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.667,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.26629816,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.166406,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 0.27672816366207137,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "inkling",
+      "name": "Inkling (high)",
+      "provider": "Thinking Machines",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.19801974666666666,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.095,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.609,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.1690288,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.21251522,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 0.7541276882539681,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "grok",
+      "name": "Grok 4.6 (high)",
+      "provider": "xAI",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.18414012,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.044,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.744,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.1968008,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.17780978,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 0.2634673259259259,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "gemma-on",
+      "name": "Gemma 4 31B (thinking on)",
+      "provider": "Google",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.12554015999999998,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.003,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.615,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.12704028,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.1247901,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 0.028434150793650796,
+          "currency": true
+        }
+      ]
+    },
+    {
+      "key": "gemma-off",
+      "name": "Gemma 4 31B (thinking off)",
+      "provider": "Google",
+      "metrics": [
+        {
+          "label": "Image-to-Scene",
+          "value": 0.11503794666666667,
+          "currency": false
+        },
+        {
+          "label": "Repair F1",
+          "value": 0.001,
+          "currency": false
+        },
+        {
+          "label": "Physical Safety",
+          "value": 0.572,
+          "currency": false
+        },
+        {
+          "label": "Indoor",
+          "value": 0.11239600000000001,
+          "currency": false
+        },
+        {
+          "label": "Outdoor",
+          "value": 0.11635892,
+          "currency": false
+        },
+        {
+          "label": "Mean cost / case",
+          "value": 0.01913622993197279,
+          "currency": true
+        }
+      ]
+    }
+  ]
+}

tests/scene-assets.test.mjs

@@ -0,0 +1,23 @@
+import test from 'node:test';import assert from 'node:assert/strict';import {AssetQueue,fetchSceneBytes} from '../assets/scene-assets.js';
+const tick=()=>new Promise(r=>setTimeout(r,0));
+test('shared requests deduplicate, concurrency is capped, and releasing the last viewer cancels stale work',async()=>{
+ let started=[],resolve={},aborted=[],disposed=[];
+ const q=new AssetQueue({maxConcurrent:2,maxIdle:0,dispose:a=>disposed.push(a.key),load:(key,signal)=>new Promise((r,j)=>{started.push(key);resolve[key]=()=>r({key,bytes:1});signal.addEventListener('abort',()=>{aborted.push(key);j(new DOMException('Aborted','AbortError'));});})});
+ const a=q.retain('A',()=>{}),a2=q.retain('A',()=>{}),b=q.retain('B',()=>{}),c=q.retain('C',()=>{});await tick();assert.deepEqual(started,['A','B']);assert.equal(q.peakRunning,2);
+ a.release();assert.equal(aborted.length,0);a2.release();await tick();assert.deepEqual(aborted,['A']);assert.deepEqual(started,['A','B','C']);
+ resolve.B();resolve.C();await tick();b.release();c.release();assert.equal(q.running,0);assert.equal(q.entries.size,0);assert.deepEqual(disposed.sort(),['B','C']);
+});
+test('a transient error retries and a later subscriber reuses the asset',async()=>{
+ let attempts=0;const states=[];const q=new AssetQueue({load:async key=>{if(++attempts===1)throw Error('503');return {key,bytes:2};},dispose:()=>{}});
+ const a=q.retain('A',e=>states.push(e.state));await new Promise(r=>setTimeout(r,850));assert.equal(attempts,2);assert.ok(states.includes('retrying'));assert.equal(states.at(-1),'ready');
+ const b=q.retain('A',()=>{});await tick();assert.equal(attempts,2);a.release();b.release();
+});
+test('a stalled fetch reaches a bounded error, and partial responses are rejected',async()=>{
+ const stalled=(_url,{signal})=>new Promise((resolve,reject)=>signal.addEventListener('abort',()=>reject(new DOMException('Abort','AbortError'))));
+ await assert.rejects(fetchSceneBytes('test',new AbortController().signal,()=>{},{idleMs:15,totalMs:100,fetcher:stalled}),/stopped responding/);
+ await assert.rejects(fetchSceneBytes('test',new AbortController().signal,()=>{},{fetcher:async()=>new Response(new Uint8Array([1,2]),{headers:{'content-length':'4'}})}),/incomplete/);
+});
+test('download progress retains every byte and aborts propagate',async()=>{
+ const p=[];const b=await fetchSceneBytes('test',new AbortController().signal,x=>p.push(x),{fetcher:async()=>new Response(new Uint8Array([1,2,3]),{headers:{'content-length':'3'}})});assert.deepEqual([...b],[1,2,3]);assert.equal(p.at(-1).received,3);
+ const c=new AbortController();c.abort();await assert.rejects(fetchSceneBytes('test',c.signal,()=>{},{fetcher:async(_,{signal})=>{signal.throwIfAborted();}}),{name:'AbortError'});
+});