Closing the gap to llama.cpp on a desk-side GB10 — six Atlas iterations, measured

ATLAS_PLE_MAX_TOKENS=8212 <env pins> ./target/release/spark serve \
  --model-from-path ~/models/radixark-fn-nvfp4 --model-name qwen --kernel-target qwen3.8-flash-next \
  --bind 127.0.0.1 --port 8001 --max-seq-len <SEQ> --max-num-seqs 1 --max-batch-size 1 \
  --gpu-memory-utilization 0.95 --fast-load-prefetch-shards --max-prefill-tokens 8192 \
  --request-timeout 3600 <extra flags>

LLAMA_ATTN_ROT_DISABLE=1 llama-server --host 0.0.0.0 --port 8000 --alias qwen -ngl 999 --jinja -fa on \
  -m Qwen3.8-Flash-Next-UD-Q4_K_XL-00001-of-00004.gguf --override-tensor 'per_layer_token_embd=CPU' \
  -c 131072 -ctk q8_0 -ctv q8_0 --parallel 1        # llama.cpp PR #27742 build, container llama-flashnext

Build a complete, polished single-file HTML5 tower-defense game (index.html: all CSS and JS inline, canvas-based, no external assets or libraries). Requirements:
- 20x12 grid map with a fixed winding enemy path (visually distinct road) and buildable cells
- 3 tower types: Gun (fast, single-target), Cannon (slow, splash AoE), Frost (slows enemies). Each has cost, range, and 2 upgrade levels (better damage/range/fire-rate). Towers can be sold for 70% of invested cost.
- Enemies: normal, fast, tank; a boss every 5th wave. Health bars above enemies. HP/speed/count scale each wave.
- Economy: start with 100 gold and 20 lives; kill bounties; wave-completion bonus; a leaked enemy costs 1 life (boss costs 5).
- UI: top bar (gold, lives, wave, score); tower shop panel with prices; click a shop tower then click the map to place (show range preview and valid/invalid cell highlight); click a placed tower to select it and show upgrade/sell panel; Start Wave button plus auto-start toggle; game speed x1/x2 button.
- Targeting: enemies closest to the exit first. Render projectiles. Show splash radius on cannon impact and a frost visual on slowed enemies.
- Win after beating wave 20; lose at 0 lives. Proper end screens with a Restart button.
- Polish: hover states, particle effects on kills, hit flashes, clean modern dark theme.
Output the COMPLETE index.html in one ```html code block. No placeholders, no TODOs — fully working code only.

Below is your current index.html for the tower-defense game. 1) Review it for bugs: logic errors, undefined variables, broken event handlers, targeting/pathing mistakes, economy bugs, rendering issues — fix them all. 2) Ensure every item of the original spec is implemented: 3 tower types with 2 upgrade levels + sell; 4 enemy types incl. boss every 5th wave; wave scaling; gold/lives/wave/score UI; place/select/upgrade/sell interactions with range preview; start-wave + auto-start + speed toggle; closest-to-exit targeting; projectiles + splash + frost visuals; win at wave 20 / lose at 0 lives with restart; particles and polish. 3) Balance: tune costs, bounties and wave scaling so waves 1-20 are beatable but challenging. 4) Polish: particles, hit flashes, nicer end screens. If the file below is cut off mid-code, complete it properly. Output the COMPLETE final index.html in one ```html code block.

Current file:
```html
{FILE}
```

Your single-file HTML5 tower-defense game below fails to load. The browser console shows this error:

    {ERR}

Find and fix the error. Also scan the whole file for any other syntax mistakes (unbalanced brackets/parentheses, broken statements) that would prevent it from running. Do not redesign anything — make the minimal corrections needed so the game runs. Output the COMPLETE fixed index.html in one ```html code block.

Current file:
```html
{FILE}
```

Your single-file HTML5 tower-defense game below now loads without console errors, but a playtest found these bugs:

{ERR}

Fix every one of them. Do not redesign anything and do not rewrite from scratch — make the minimal, targeted corrections needed so the game plays correctly end to end (place towers where the player clicks, towers acquire and shoot enemies in range, waves end and the next wave can start, HUD/toasts behave). Output the COMPLETE fixed index.html in one ```html code block.

Current file:
```html
{FILE}
```

Sampling (all rounds, all configs): temperature 0.7 · top_p 0.8 · max_tokens 26,624 per round · thinking
disabled (chat_template_kwargs: enable_thinking=false). From ATLAS3 on, the request also pins
presence_penalty 0 · top_k 40 · min_p 0.05 (TDBENCH_EXTRA) so Atlas's model preset (presence 1.5) does not
apply — that is what llama.cpp had been getting all along.

Protocol: Round 1 = the build prompt; Round 2 = the review prompt with the model's own file pasted in. The
harness (tdbench_s.py) extracts the single ```html block from each reply; the last complete file is the
published game. A fix round (tdfix3.py) sends the current file back with either the browser console error
(FIX template) or a playtest brief written by the reviewer (RUNTIME template, texts below); the harness
pads the prompt with whitespace until its tokenised length is even (a workaround kept from the first run).
Every game was loaded in a browser and played through by the reviewer before its result was written down.

Serving (Atlas rounds): prod llama-flashnext stopped first (one 128 GB pool); the exact serve line, env pins
and flags per iteration are in "Serve command per game" above. Prod restored after each run. Publishing: spark → orange ~/sites/bench → Caddy → wg umbilical → edge (TLS).

Uncaught SyntaxError: Unexpected end of input

RUNTIME:
1. Click-to-cell mapping is wrong on the Y axis: clicking a buildable cell places the tower on a different, lower row (roughly double the clicked canvas Y). The canvas is displayed at CSS size (width:100%) while its internal resolution differs, and the click handler does not scale mouse coordinates by canvas.width/rect.width and canvas.height/rect.height consistently for both axes. The range preview / hover highlight must use the same corrected mapping.
2. Because of (1) (and possibly independently) towers never fire: with two Gun towers placed beside the road, wave 1's six enemies walked the whole path untouched — score stayed 0, gold never increased, no projectiles were drawn. Verify targeting (closest-to-exit in range), fire-rate cooldown, projectile spawn/update/hit and bounty payout actually run inside the main game loop.
3. Wave completion never triggers: after all wave-1 enemies leaked (lives 20 -> 14) the HUD stayed "WAVE IN PROGRESS", the Start Wave button never re-enabled, and the "LANE CLEAR — deploy your towers" toast was re-added on every frame (dozens of stacked toasts). End the wave once all enemies of the wave have spawned and none remain (killed or leaked), pay the wave bonus, advance the wave counter, re-enable Start Wave / honor auto-start, and show status toasts only once per state change.

Uncaught ReferenceError: c is not defined at drawOverlayGrid

RUNTIME:
1. The game can never be started. Clicking "Deploy Forces" (or anywhere on the canvas) runs handleClick, whose `state==='intro'` branch only toggles the intro overlay's CSS classes ('show'/'hide') and never sets `state='idle'`, so updateControls() keeps the Start Wave button disabled forever and the Space key does nothing. The intro overlay also flickers: it is briefly re-shown then hidden on every click. Fix: on Deploy Forces (and only there), hide the intro overlay for good, set state='idle', call updateControls(), and stop the canvas click handler from treating clicks as intro dismissal.
2. Because state stays 'intro', towers cannot be placed: handleClick returns early (`if(state!=='idle'&&state!=='wave')return;`) before the placement code. After fix 1, verify that picking a tower in the Armory (pendingType) and clicking a buildable cell calls placeTower and deducts gold.
3. The enemy road is nearly invisible: buildTerrain() strokes it with #3a4b58 / #2a3a46 / #33475a on a #101c25 background, so the player sees no path. Make the road clearly visible (higher-contrast fill and edge, e.g. a lighter road with a bright dashed centre line) and make the spawn/goal portals clearly visible.

index.html:530:135 Uncaught SyntaxError: Unexpected token '}'

RUNTIME:
1. The intro overlay is never shown, so the player cannot press "Deploy Forces" and the game stays in state 'intro' with Start Wave disabled. The `.overlay` CSS rule defaults to opacity:0 and pointer-events:none, and nothing ever adds the 'show' class to the #intro element at startup. Fix: add `intro.classList.add('show')` during init (after updateControls()), and make the Deploy Forces handler remove 'show' (it already sets state='idle' and calls updateControls()).
2. The enemy road is drawn as a tiny squiggle in the top-left corner instead of across the map: PATH from buildPath() holds grid-cell coordinates (0..19, 0..10.5), but strokePath(c) passes PATH[i].x / PATH[i].y straight to moveTo/lineTo as pixels. The portals are correct because drawPortal is called with SPAWN.x*CELL. Fix: in strokePath multiply by CELL (c.moveTo(PATH[0].x*CELL, PATH[0].y*CELL) and c.lineTo(PATH[i].x*CELL, PATH[i].y*CELL)). Then check every other consumer of PATH — computePathCells, pathDist, pointAt, PATH_LEN, enemy movement and the shadow dots in buildTerrain — and make sure they all agree on one unit (pixels) so that enemies walk along the visible road and pathCells marks the road cells as unbuildable.

RUNTIME:
1. Enemies still move in grid-cell units while everything else is in pixels: spawnEnemy starts them at PATH[0] (cell coords), updateEnemies advances e.dist by spd px/s (55–92) and pointAt(e.dist) interpolates along PATH in cell units, so PATH_LEN is only 25.5 and every hostile "breaches the line" in well under a second, never entering any tower's range (ranges are 125–172 px). Fix it at ONE place: define the path in pixels, i.e. replace `const PATH=buildPath();` with `const PATH=buildPath().map(p=>({x:p.x*CELL,y:p.y*CELL}));`. Then make these three consumers consistent with pixel coordinates: (a) strokePath(c): use PATH[i].x and PATH[i].y directly again (remove the *CELL you added there); (b) computePathCells(): the number of steps should be Math.ceil(Math.hypot(b.x-a.x,b.y-a.y)/CELL*4) and the cell key must be Math.floor(x/CELL)+'_'+Math.floor(y/CELL); (c) pointAt(s) and directionAt(s): the fallback return past the end must be {x:GOAL.x*CELL,y:GOAL.y*CELL} (GOAL/SPAWN stay in cells; drawPortal already multiplies by CELL). pathDist(px,py) and isBuildable() already pass pixels, so they become correct automatically. Do not change the enemy speeds or tower ranges.
2. The HUD counters never update: popStat(el) only replays the 'bump' animation and nothing ever writes the numbers, so the header keeps showing 100 gold / 20 lives / wave 0 / score 0 while the game state changes. Add a function updateHud() that writes gold, lives, the wave counter (current wave / total waves) and score into the existing HUD elements (goldVal, livesVal and the wave/score elements), call it at the start of popStat(el), once at init, and at the end of loop() every frame.

RUNTIME:
1. Gold becomes NaN after the first kill, so the HUD shows "NaN" and no further towers can be bought. In updateEnemies(), the kill reward is computed as `Math.round(e.bounty*(1+e.shield/e.shieldMax*SHIELD_PEN))`; for unshielded enemies (normal, fast) shield and shieldMax are both 0, so 0/0 = NaN and `gold+=reward` poisons gold. Fix: compute the shield fraction safely, e.g. `const sf=e.shieldMax>0?e.shield/e.shieldMax:0; const reward=Math.round(e.bounty*(1+sf*SHIELD_PEN));`. Check the other places that divide by shieldMax (the enemy shield bar drawing, damageEnemy) and guard them the same way.

index.html:497 Uncaught ReferenceError: c is not defined
    at drawOverlayGrid (index.html:497)
    at render
    at loop

RUNTIME:
1. Towers can be placed on the road. Cause: pathDist(px,py) returns NaN for every point, so `pathDist(c.x,c.y)<CELL*.5` in isBuildable() is never true. pathDist is NaN because PATH contains consecutive duplicate waypoints (buildPath() calls `push(3,4);corner(3,4);` and corner() pushes (3,4) again — same at (9,5) and (15,6)), which makes zero-length segments; pointSeg() divides by the squared segment length, 0/0 = NaN, and Math.min propagates it. Make exactly two changes and nothing else: (a) in pointSeg(), if the squared segment length is 0, return the plain distance from the point to the segment's start point; (b) in isBuildable(i,j), return false when pathCells.has(i+'_'+j). Do NOT modify buildPath() or the path shape, and do not rewrite any other function. Output the complete file.

RUNTIME:
1. The top stats panel (gold, lives, wave, score — elements #sGold, #sLives, #sWave, #sScore) never changes while playing: updateStats() is only reached through updateAll(), which runs at init and on shop/inspector actions, so kills, leaks, wave changes and gold income are never reflected. Fix: in frame(now), right after the `for(let i=0;i<steps;i++)update(dt);` loop (inside the same `if(!G.paused&&G.phase!=='start')` block), call `updateStats();` and `updateStartButton();`. Do not change update(), draw(), or anything else.

index.html:962 Uncaught ReferenceError: buildStatic is not defined
    at resetGame (index.html)
    at index.html:962

RUNTIME:
1. The game never starts: at init, resetGame() calls buildStatic(), which does not exist, so the script throws "ReferenceError: buildStatic is not defined" and requestAnimationFrame(loop) is never reached (the board stays black; only the HUD and shop clicks work). The pre-render function that builds roadBase/roadTop/decor/staticBake IS defined — it is named bakeStatic(). Make exactly one change: in resetGame(), replace the call `buildStatic();` with `bakeStatic();`. Do not rename bakeStatic, do not add a new function, do not change anything else. Output the complete file.

RUNTIME:
1. The game freezes the moment a turret acquires a target: update(dt) throws "ReferenceError: lv is not defined" and the requestAnimationFrame loop dies. In update(), inside `for(const t of gridMap.flat())`, only the frost branch defines `const lv=t.lv`; the other branch (gun/cannon) uses `lv.dmg`, `lv.cd`, `lv.range` etc. without defining `lv` (it calls `lv2(t)` for the range check but never binds `lv`). Make exactly one change: at the start of that `else` branch (before `let best=null,bd=-1;`) add `const lv=lv2(t);`. Also check that the frost branch's `const lv=t.lv` is the intended level object (if `t.lv` is the level INDEX, use `const lv=lv2(t);` there too). Do not change anything else. Output the complete file.