Karpathy builds HackerTube video site in two hours using Claude Code

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Karpathy shares his weekend project HackerTube, built and launched in about two hours using Claude Code and Opus 5.5 (Medium effort). Claude filtered through 43 million comments from the past 20 years of Hacker News to identify 6,454 videos consistently recommended by engineers. The site requires no login (state is saved in a local browser session), thumbnails are taken from the middle frame of each video, and underlying comment analysis data is available as a zip file for self-hosted versions.

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