{
  "date": "2026-09-30",
  "brief": "Make a small, funny browser game about a goblin engineer building a bridge so a laden cart can cross a ravine. Let player construction choices affect whether the cart reaches the other side. Include a short build phase, a visible test run, clear success or failure and a quick retry. Choose the controls, mechanics and visual approach yourself. Keep it small enough to play in a few minutes.\n",
  "reasoning": "max",
  "browser_feedback_during_generation": false,
  "parent_game_repairs": false,
  "browser_checks": "Agent-operated Chrome after freezing each game. Model-specific observations are recorded below.",
  "models": {
    "gpt61-sol": {
      "model": "openai/gpt-6.1-sol",
      "generation_status": "stopped after repeated upstream rate limit; no model finish call",
      "cost_usd": 0.8724381,
      "files_sha256": {
        "THREE-LICENSE.txt": "8b378ebe60e2fe500158cb0ac71cb5e8b7d92953c2abcc63a0eb90499653b5bc",
        "bridge-core.js": "c9d138037768bc9e078f4f192bd0e5accfb1b6402911a6108de3571f94708c45",
        "bridge.test.js": "75a3e0d225b5065bf332d633e992fa87ac8e4d814d8c5702640f14cf373ffc89",
        "game.js": "50ef69b512571ed7c04cf2e1623a8ee01f527bf9370d0706794ce7f030734a68",
        "index.html": "973c734cdaa13682f91182c21d310e12e57647c8d7ece9a970cc82e0329599d4",
        "runtime.test.js": "f099a9f901065c4d4e0f10b769ca5ad61d95cea8ddf882850fd878d792150a33",
        "style.css": "ae534aee028783d3338b0e171de0ef6c2df421b4ca78d5ab3b409cd5300499ba",
        "three.global.js": "d7e303b2d349436a8cfdcec421bd03f56f5b43ec30681689d5c5fad6dd1a60d0"
      },
      "browser_checks": "Poor construction failed; stronger construction crossed; all three deliveries, retry and fresh-round reset checked."
    },
    "gpt6-sol": {
      "model": "openai/gpt-6-sol",
      "generation_status": "complete",
      "cost_usd": 1.0942889,
      "files_sha256": {
        "THREE-LICENSE.txt": "8b378ebe60e2fe500158cb0ac71cb5e8b7d92953c2abcc63a0eb90499653b5bc",
        "game.js": "026402a0a99965134dbc34abcc4e7696ce4a0883e9efda560be283da284516e3",
        "index.html": "3974d811f944ef2589bb51bfb7a6fcba298482980bd3cd2f1dd1de1ba0d932c3",
        "styles.css": "300fb84c8301a59762152f1ca57a3e8f974d41a1f1de13afca7dbd5d6662fc5c",
        "three.global.js": "d7e303b2d349436a8cfdcec421bd03f56f5b43ec30681689d5c5fad6dd1a60d0"
      },
      "browser_checks": "Poor construction failed; stronger construction crossed; all three deliveries, retry and fresh-round reset checked."
    },
    "gpt6-astra": {
      "model": "openai/gpt-6-astra",
      "generation_status": "complete",
      "cost_usd": 5.4185915,
      "media_cost_usd": 0,
      "files_sha256": {
        "README.md": "194cc708b58cda4ddd3ae234c1da78cd066cd41537d87b388c7035615481632e",
        "THREE-LICENSE.txt": "8b378ebe60e2fe500158cb0ac71cb5e8b7d92953c2abcc63a0eb90499653b5bc",
        "bridge-model.js": "a10c8bf50c989f3e70fe00817c68dcc2493301a69d6978d9fd9e58741a8f1a94",
        "game.js": "f1e566a46fdf986edd46b5bed7e391a205f8c41bc470fc434d64e2df0b260be3",
        "index.html": "828cda21609774e8307722072eff898f2dfd8f1944e0579888baf907210da2bc",
        "package.json": "7e50461b6e3975b27d825de7d0af366da2708589e0ab205ea3a087b19a7d8cb5",
        "styles.css": "08a3713c2c241ee4059349d4f32fbdd56de4f3fcdfd3abc9061cf814dfc92502",
        "tests/model.test.js": "8518db669d8a5b184d2ae09c907e49fa2b3c2a63ddac7627e88cd0204e624743",
        "tests/ui.test.js": "62e26d311c9711f012473087cbcff5940127c1cf4e871bd9989052bee146a1b8",
        "three.global.js": "d7e303b2d349436a8cfdcec421bd03f56f5b43ec30681689d5c5fad6dd1a60d0"
      },
      "browser_checks": "All timber failed at bay 3. Centre iron passed for 11 bolts. Iron at bays 1/5 failed for 12; moving it to bays 2/4 passed for 12. Retry, keyboard editing/undo and full clear/refund checked. No console errors captured. 390px layout has no horizontal overflow.",
      "simulation": "Fixed-bay material capacity, adjacent bonuses and overload fatigue; no free geometry or validated structural analysis.",
      "fun_verdict": "No new verdict from Nikita yet."
    },
    "opus55": {
      "model": "anthropic/claude-opus-5.5",
      "generation_status": "complete",
      "cost_usd": 10.6716018,
      "listed_media_receipts_usd": 0.148,
      "media_account_debit_verified": false,
      "files_sha256": {
        "README.md": "87df843ad4fe26675d6f07e924bc3ba814341704a7ad07f7e6db5d046fb98cbf",
        "THREE-LICENSE.txt": "8b378ebe60e2fe500158cb0ac71cb5e8b7d92953c2abcc63a0eb90499653b5bc",
        "assets/generate_music-1.mp3": "85a107b65de409d33a659320c5ca9eac6d8ebb99e5ba6992441539b0c2deb6b8",
        "assets/generate_sfx-1.mp3": "32a5016f0fd362af17444e15cee68fdd9d17ea56cfc28c174effc92d2d803a67",
        "assets/generate_sfx-2.mp3": "3950611b60f3fac60c0bb51317b5ffefc423a6d00f6faff582b7dff0bcde4cca",
        "assets/generate_sfx-3.mp3": "3ef1d675eede0af743c329806181b34aa8c32bd95ecc4c8efb92ac876f0318dc",
        "assets/generate_sfx-4.mp3": "a5df212a7d7f0c3629487ed404430182232d0fcac1411676b05c2cd3181f293f",
        "assets/generate_sfx-5.mp3": "bb4bba47b0ee067d1c69536fd3f7ddc1386456d47d6cf2f6d679ed340163f564",
        "assets/generate_sfx-6.mp3": "4fefe0cda53b67eef1dd1df7462a7c6df23b98173f892059758bab2dd6bdb0a0",
        "assets/generate_sfx-7.mp3": "cd8d17c9735e82cc554fd10bc8e553500b44635ec2c96d60bb5919505db53e1d",
        "assets/generate_voice-1.mp3": "aa062693dba018f9b07e7c3ee5a91b5edd08f16e89bfcbd572cf93af4a998d9c",
        "assets/generate_voice-2.mp3": "78f00bbdee256435f016cc671e0ba563ecddd95edc45908229a51f95d0323d5b",
        "assets/generate_voice-3.mp3": "e4f4eab1a72b5062188a59a4f8793df8a3380c06b651f0bc808087ba38d93c49",
        "assets/generate_voice-4.mp3": "439d36a8cac9a16eb5c83f4a1ad5f6a982a0632a2679c7a03d49fb71f9c13aae",
        "assets/generate_voice-5.mp3": "605bc33721aa1919f198761f387357b23dd4612e098ce58c3b719a606e020b53",
        "assets/generate_voice-6.mp3": "68794e7abcf955ffd36c661830219861dd5f371ab3c950e4a32a30b38f3f589d",
        "game.js": "dfb976da4834ee320c263f49797d5aedb00daace0d61fa31d9fa820ed69546aa",
        "index.html": "32b13be1a3a1e9ba198715b3116861273f1a57f91d8cd96f9aa04041f9b5333f",
        "physics.js": "bf210ddbf40488353733da06e6d42f1e9310b1eae4fbe5d7f40cbf7fd3c6d496",
        "style.css": "ecf3813c401d3a109a1a51621f2d62c9758af990f0a6d94924bf5f236d74b718",
        "tests/physics.test.js": "4a2b785b051db8eed7127e0ab0053831b48ffdf2fd524e05029ebca8ccf4cab3",
        "tests/players.js": "f2fec95afd01b5dabf33ce5c64e3c5c59da8b7e80347027d399a0b87d383d0f1",
        "tests/smoke.js": "3092b63389743777c422eb5ac96fbb3a0dfa98c0523e4f99e54e9128c831fc8e",
        "tests/sweep.js": "4dbe542291e2ad3a0f888a1f77ae78247afb018aeeb554849fec525124243803",
        "tests/tune.js": "3ca068d0d96412a6c46392195a66b42d86950517767cc052d43f6ecb57030a06",
        "three.global.js": "d7e303b2d349436a8cfdcec421bd03f56f5b43ec30681689d5c5fad6dd1a60d0"
      },
      "browser_checks": [
        {
          "level": 1,
          "load_kg": 210,
          "design": "three 2m road planks, no supports",
          "cost": 60,
          "result": "failure",
          "snapped": 2,
          "screenshot": "./assets/opus-plank-failure.png"
        },
        {
          "level": 1,
          "load_kg": 210,
          "design": "same road; wood struts from (8,2) to (10,0) and (14,2) to (12,0)",
          "cost": 94,
          "result": "success",
          "snapped": 0,
          "screenshot": "./assets/opus-struts-success.png"
        },
        {
          "level": 1,
          "load_kg": 210,
          "design": "same road; above-deck wood chain (8,0)-(10,-1)-(12,-1)-(14,0), two verticals",
          "cost": 112,
          "result": "failure",
          "snapped": 4,
          "screenshot": "./assets/opus-arch-failure.png",
          "note": "Agent-built alternative, not the model-tested 114-gold lower arch"
        },
        {
          "level": 2,
          "load_kg": 560,
          "design": "four 2m road planks; wood supports (7,2)-(9,0), (15,2)-(13,0), (11,3)-(11,0)",
          "cost": 132,
          "result": "failure",
          "snapped": 6,
          "screenshot": "./assets/opus-anvils-wood-failure.png"
        },
        {
          "level": 2,
          "load_kg": 560,
          "design": "same road and support positions; three supports changed to iron",
          "cost": 220,
          "result": "success",
          "snapped": 0,
          "screenshot": "./assets/opus-anvils-iron-success.png"
        },
        {
          "level": 3,
          "load_kg": 420,
          "design": "five 2m road planks; two ropes (5,-4)-(10,0), (17,-4)-(12,0)",
          "cost": 140,
          "result": "failure",
          "snapped": 2,
          "screenshot": "./assets/opus-rope-two-failure.png"
        },
        {
          "level": 3,
          "load_kg": 420,
          "design": "same road and ropes; add ropes (5,-4)-(8,0), (17,-4)-(14,0)",
          "cost": 170,
          "result": "success",
          "snapped": 0,
          "screenshot": "./assets/opus-rope-success.png"
        }
      ],
      "simulation": "Player-drawn integer-grid beams, length/cost limits, mass, rope tension, stress breakage and joint bending; toy simulation, not engineering validation.",
      "phone_width": "390px viewport, 840px document scroll width; tiny controls. Desktop recommended.",
      "fun_verdict": "No new verdict from Nikita yet."
    }
  },
  "limitations": [
    "One generated game per model; no general model ranking.",
    "Sol and Astra use capacity rules; Opus uses a toy structural simulation. None is validated engineering.",
    "Real phone hardware and audio quality were not tested. Opus has tiny controls and horizontal overflow at 390px.",
    "GPT-6 Sol mouse/touch construction was not tested.",
    "Opus performed nonvisual rendering and programmatic tests during generation, but had no browser visual feedback.",
    "Opus paused before a request because of a conservative context guard; the runner bound was corrected and the same conversation resumed without game or prompt changes."
  ],
  "nikita_feedback": {
    "date": "2026-09-30",
    "applies_to": [
      "gpt61-sol",
      "gpt6-sol"
    ],
    "judgement": "Both games were boring: replacing the same decks and adding braces left little engineering or challenge.",
    "source": "Direct feedback from Nikita; separate from functional test results."
  },
  "total_openrouter_charge_usd": 18.0569203
}