{
  "added_at": "2026-10-19",
  "additional_evidence_urls": [
    "https://github.com/zhxunzh84/rea-dino-reverse-engineering/blob/1fa0ae9faae97d65754f2abf89d3e8326aea9525/docs/reverse-engineering.md",
    "https://github.com/zhxunzh84/rea-dino-reverse-engineering/blob/1fa0ae9faae97d65754f2abf89d3e8326aea9525/docs/testing.md",
    "https://github.com/zhxunzh84/rea-dino-reverse-engineering/blob/1fa0ae9faae97d65754f2abf89d3e8326aea9525/docs/lessons-learned.md",
    "https://github.com/zhxunzh84/rea-dino-reverse-engineering/blob/1fa0ae9faae97d65754f2abf89d3e8326aea9525/dino-demo.html",
    "https://github.com/zhxunzh84/rea-dino-reverse-engineering/blob/1fa0ae9faae97d65754f2abf89d3e8326aea9525/THIRD_PARTY_NOTICES.md",
    "https://github.com/zhxunzh84/rea-dino-reverse-engineering/blob/1fa0ae9faae97d65754f2abf89d3e8326aea9525/LICENSE"
  ],
  "category": "community-case-studies",
  "description_en": "The author uses REA’s MCP browser tools to passively capture the JavaScript loaded by wayou’s open-source T-Rex Runner page, then has Codex rebuild its acceleration rule in one self-contained HTML5 Canvas game. The report identifies the captured script by SHA-256 and separates verified source facts from reconstruction choices; only the speed rule is claimed, not full gameplay equivalence.",
  "description_zh": "作者使用 REA 的 MCP 浏览器工具被动捕获 wayou 开源 T-Rex Runner 页面已加载的 JavaScript，再由 Codex 在一个自包含的 HTML5 Canvas 游戏中重建其加速规则。报告以 SHA-256 标识所捕获的脚本，并区分已核实的源码事实与重建选择；只主张速度规则一致，不主张完整玩法等价。",
  "entry_url": "https://awesomerea.org/resources/rea-dino-runner-community-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/rea-dino-runner-community-case/",
  "evidence_url": "https://github.com/zhxunzh84/rea-dino-reverse-engineering/blob/1fa0ae9faae97d65754f2abf89d3e8326aea9525/README.md",
  "group": "rea",
  "id": "rea-dino-runner-community-case",
  "json_url": "https://awesomerea.org/resources/rea-dino-runner-community-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/rea-dino-runner-community-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/rea-dino-runner-community-case/index.md",
  "name": "Dinosaur runner: an REA-inspected speed rule rebuilt with Codex",
  "name_zh": "恐龙跑酷：经 REA 检查、由 Codex 重建的速度规则",
  "record_type": "resource",
  "relationship": "community-reported-mixed-workflow",
  "requirement_facets": [
    "scope",
    "attribution",
    "prerequisites",
    "testing",
    "license"
  ],
  "requirements": [
    "The target is wayou’s open-source, Chromium-derived T-Rex Runner page, not chrome://dino/ or hidden proprietary code; the investigation read JavaScript the browser had already loaded. Only the acceleration rule is reconstructed: start at 6 and add 0.001 per eligible update while below 13, with no elapsed-time factor. Artwork, physics, obstacles and scoring are new or simplified, and the intro, ducking, audio and narrow-screen speed reduction are omitted.",
    "README and the report record REA MCP list_browser_targets and inspect_web_page calls over a local Chrome DevTools Protocol endpoint, with no navigation, clicks or page evaluation; Codex handled analysis, implementation and tests. Evidence IDs and excerpts come from the author’s REA results, but the full evidence bundle is not published and the live upstream script may change.",
    "Playing needs only a browser: dino-demo.html is self-contained, with no external assets, packages or build step, and a GitHub Pages copy is linked. The embedded tests run from the page’s Run speed tests button, the browser console or the documented Node.js harness with mocked DOM, Canvas and animation-frame interfaces.",
    "The author reports 67 of 67 embedded tests passing (15 unit, 52 integration), ten rejected in-memory mutations and seven owner-reported manual browser checks on 2026-10-13 without browser or OS details. Floating-point results such as the extra step past 13 at update 7,001 were measured in the reconstruction, not sampled from the original. There is no CI or cross-browser coverage.",
    "The project is MIT-licensed; short original-source excerpts keep the Chromium BSD-style header, and THIRD_PARTY_NOTICES.md reproduces the upstream BSD-3-Clause terms. This third-party repository is separate from REA’s own dinosaur-speed teaching case."
  ],
  "requirements_zh": [
    "调查对象是 wayou 的开源 T-Rex Runner 页面（源自 Chromium），不是 chrome://dino/，也不是隐藏的专有代码；调查读取的是浏览器已加载的 JavaScript。仅重建加速规则：从 6 开始，速度低于 13 时每次符合条件的更新加 0.001，不乘以经过时间。美术、物理、障碍物和计分为新写或简化实现，并省略开场动画、下蹲、音频及窄屏降速。",
    "README 与报告记录了通过本地 Chrome DevTools Protocol 端点调用 REA MCP 的 list_browser_targets 和 inspect_web_page，未进行页面导航、点击或页面内求值；分析、实现和测试由 Codex 完成。证据 ID 与摘录来自作者的 REA 结果，但完整证据包未公开，线上的上游脚本也可能变化。",
    "运行只需浏览器：dino-demo.html 为自包含文件，无外部素材、依赖包或构建步骤，并附有 GitHub Pages 版本链接。内嵌测试可通过页面上的 Run speed tests 按钮、浏览器控制台，或文档给出的 Node.js 测试脚本（模拟 DOM、Canvas 和动画帧接口）运行。",
    "作者报告 67 项内嵌测试全部通过（15 项单元测试、52 项集成测试），10 个内存中的变异版本均被测试拒绝，项目所有者另报告于 2026-10-13 完成 7 项手动浏览器检查，但未提供浏览器或操作系统信息。第 7,001 次更新越过 13 多加一步等浮点结果是在重建版本中测得，并非对原游戏采样。没有 CI 或跨浏览器覆盖。",
    "项目采用 MIT 许可；简短的原始源码摘录保留 Chromium 的 BSD 风格版权头，THIRD_PARTY_NOTICES.md 完整转载上游 BSD-3-Clause 条款。此第三方仓库与 REA 官方的恐龙加速教学案例相互独立。"
  ],
  "targets": [
    "game",
    "website"
  ],
  "url": "https://github.com/zhxunzh84/rea-dino-reverse-engineering",
  "verification": "source-reviewed",
  "verified_at": "2026-10-18"
}