Yarchi(@undefinedKi):Andrej Karpathy just built his own YouTube in about 2 hours. His pipeline works for almost any app I broke down how it works: He didn’t write a smarter algorithm. He let a crowd that has been recommending things for 20 years do the ranking, and had Claude read it The whole thing rests on one idea: “a link posted in a reply is a vote” So the work splits cleanly: > the crowd picks the items > Claude reads and counts > he does only what needs his accounts The pipeline has 6 steps: 1. Annoyance: a feed that serves you badly 2. Source: years of threads where people share links 3. Filter: keep what comes back again and again, drop one-offs 4. Enrich: one API key, Claude pulls each item’s details 5. Build: a small site, no logins 6. Ship: server and domain, then hand Claude the IP The filter is where the value is. 43M Hacker News comments became 6,454 videos, a list no person could make by hand The site stays small on purpose. Likes and history live in your browser, so there are no accounts to build or secure. Thumbnails are a frame from the middle of the video, not the A/B-tested cover Shipping took one prompt: “update, secure, harden, deploy and optimize” He shares the full analysis as one zip, so you can point your Claude at it and build your own version His setup: Claude Code on Mac, Opus 5.5 on Medium effort. His only manual work was an API key, a VPS and a domain Swap Hacker News for any community that has argued about books, tools or papers for years, and the same pipeline works

2026.11.02 13:33

Andrej Karpathy just built his own YouTube in about 2 hours. His pipeline works for almost any app I broke down how it works: He didn’t write a smarter algorithm. He let a crowd that has been recommending things for 20 years do the ranking, and had Claude read it The whole thing rests on one idea: “a link posted in a reply is a vote” So the work splits cleanly: > the crowd picks the items > Claude reads and counts > he does only what needs his accounts The pipeline has 6 steps: 1. Annoyance: a feed that serves you badly 2. Source: years of threads where people share links 3. Filter: keep what comes back again and again, drop one-offs 4. Enrich: one API key, Claude pulls each item’s details 5. Build: a small site, no logins 6. Ship: server and domain, then hand Claude the IP The filter is where the value is. 43M Hacker News comments became 6,454 videos, a list no person could make by hand The site stays small on purpose. Likes and history live in your browser, so there are no accounts to build or secure. Thumbnails are a frame from the middle of the video, not the A/B-tested cover Shipping took one prompt: “update, secure, harden, deploy and optimize” He shares the full analysis as one zip, so you can point your Claude at it and build your own version His setup: Claude Code on Mac, Opus 5.5 on Medium effort. His only manual work was an API key, a VPS and a domain Swap Hacker News for any community that has argued about books, tools or papers for years, and the same pipeline works

Andrej Karpathy@karpathy

2026.11.01 18:14

Weekend hack: HackerTube. I was annoyed with YouTube's recommendations so I had Claude filter down 43M comments over 20 years of HN to 6,454 videos that keep being recommended. *Significantly* better viewing experience, ~2 hours with Opus 5.5: - Excellent recs without any logins (state is kept in local browser session) - Thumbnail is a representative frame from middle of the video instead of the super duper A/B test hyper-optimized user uploads - Underlying data from the comment analysis as one zip file, point your Claude at it and ask for your own version - HackerTube Longs ✊ A bit more on the process: I use Claude Code (desktop app for Mac), Opus 5.5 on Medium effort as my default. I only talk to Claude and have it do everything, the only "manual work" I helped with in tandem was in the browser (reminiscent of MenuGen): 1) I had to create some kind of API key from Google Cloud UI to query YouTube for video metadata, 2) I booted up a VPS box for serving and 3) I bought the domain name. Once the box was up I gave Claude the IP and told it update, secure, harden, deploy and optimize the code, and it did the whole thing. Many awesome projects that would have normally taken weeks/months even can now be few-shotted for breakfast. What else are we not thinking of.

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