Karpathy Built HackerTube in Two Hours with Claude Opus 5.5
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Andrej Karpathy used Claude Opus 5.5 (Claude Code) to filter YouTube videos recommended over the past two decades from Hacker News comments and built HackerTube, a YouTube look-alike. About 40,000 recommendation comments were consolidated into 6,454 videos spanning 2007–2026 and covering 150 topics, all in roughly two hours. By hand, he did only three things: apply for a Google API key, spin up a VPS, and buy a domain; the rest was done by conversing with Claude. Once the VPS was up, he handed over the IP and let it update, deploy, harden, and optimize on its own. The site's thumbnails use the 50% progress frame, For You requires no login and stores state in the browser's local session, and the data can be exported for your own agent to make further variants.
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The original post documents the entire process from filtering HN comments to deploying the site live, showing the concrete path to building a replicable site with Claude Code in two hours.
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HackerTube：Andrej Karpathy 用 Hacker News 推荐视频自建「净化版 YouTube」，Claude Opus 5.5 两小时做完
周五晚被 YouTube 夸张缩略图和算法垃圾刷到崩溃后，Andrej Karpathy 周六用 Claude Opus 5.5（Claude Code）从 Hacker News 评论里筛出近二十年被推荐过的 YouTube 片，做成仿 YouTube 的 HackerTube：约 4 万条推荐评论 → 6,454 条视频、150 个主题；他自己几乎不再写代码，全程跟 Claude 对话，手工只做了 Google API 密钥、开 VPS、买域名三件事，整个过程两小时！
https://t.co/MeAdrJpISQ
# 动机：主流推荐对他失效
他打开 YouTube 看到的是「被劣化的一墙垃圾」：夸张缩略图、重复话题、低智内容。承认这类算法可能适合互联网上的「中位数用户」，但不适合自己。解决办法不是再调推荐，而是换信源：把 HN 评论里「有人认真推荐过」的视频当成策展层。
# 怎么做出来的
Opus 拉全量 HN 评论，先过滤，再用 Sonnet 走 Claude Code 的 Workflow 去掉垃圾与低质，收成约 4 万条「在推荐 YouTube 视频」的评论，汇总成 2007–2026 间、跨 150 主题的 6,454 条片。再套上 YouTube 式界面、买域名、推到 VPS，并做安全加固与优化。文末补充工作方式：日常默认 Opus 5.5 Medium；不再自己读改代码、敲终端，只跟 Claude 说话；VPS 起来后把 IP 交给它，让它自己更新、部署、加固、优化。他说这仍有一点「和队友轮流干活」的感觉，因为中间要等 Claude 跑完。
# 产品上刻意做的几件事
内容侧押在「HN 上有人推过」；缩略图不用上传原图，改用 50% 进度帧（避开夸张封面）；For You 不登录，状态放在浏览器本地会话；有键盘快捷键；站点数据可导出，方便丢给自己的 agent 再做一个变体。一句话：策展靠社区推荐，交互尽量轻、可复制。