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Karpathy builds video recommender in 2 hours with Claude; HackerShelf recreates for books

By PulseAugur Editorial · [4 sources] ·

Andrej Karpathy developed HackerTube, a video recommendation site, in approximately two hours using Claude Code and Opus 5.5. The tool filters YouTube links from Hacker News comments, identifying videos with repeated interest from multiple users across different months. Following Karpathy's project, another developer recreated a similar concept for books, named HackerShelf, using Cursor and Gemini 3.5 Flash-Lite. This second project took about 2.5 hours and incurred minimal cost due to free API tiers. AI

IMPACT Demonstrates the capability of LLMs to rapidly prototype niche applications and the potential for cross-tool experimentation.

RANK_REASON Developer recreates a project using different AI tools and data.

Read on Medium — AI coding tag →

AI-generated summary · Google Gemini · from 4 sources. How we write summaries →

Karpathy builds video recommender in 2 hours with Claude; HackerShelf recreates for books

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2 / 100
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Tool
Developer recreates a project using different AI tools and data.
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4 independent sources
Strong cross-source corroboration — multiple independent publishers covered this within the clustering window.
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product, model release
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Same-day
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Full methodology in our editorial standards.

COVERAGE [4]

  1. dev.to — Claude Code tag TIER_1 English(EN) · cz ·

    Understanding HackerTube: Karpathy’s Two-Hour Experiment in Better Recommendations

    <p>HackerTube is a video discovery site built from YouTube links that people have shared on Hacker News over the years.</p> <p>Andrej Karpathy created it after becoming frustrated with his YouTube homepage. He wanted an evening’s viewing to begin with something worth watching, ra…

  2. Medium — AI coding tag TIER_1 English(EN) · Ishank choudhary ·

    HackerShelf: The Books Hacker News Recommends, Rebuilt from Karpathy’s HackerTube with Cursor

    <div class="medium-feed-item"><p class="medium-feed-image"><a href="https://medium.com/@ishank.iandroid/hackershelf-the-books-hacker-news-recommends-rebuilt-from-karpathys-hackertube-with-cursor-7a9cff210bc5?source=rss------ai_coding-5"><img src="https://cdn-images-1.medium.com/m…

  3. Medium — AI coding tag TIER_1 English(EN) · Ishank choudhary ·

    HackerShelf: The Books Hacker News Recommends, Rebuilt from Karpathy’s HackerTube with Cursor

    <div class="medium-feed-item"><p class="medium-feed-image"><a href="https://ai.plainenglish.io/hackershelf-the-books-hacker-news-recommends-rebuilt-from-karpathys-hackertube-with-cursor-7a9cff210bc5?source=rss------ai_coding-5"><img src="https://cdn-images-1.medium.com/max/1600/1…

  4. dev.to — LLM tag TIER_1 English(EN) · Ishank Choudhary ·

    HackerShelf: The Books Hacker News Recommends, Rebuilt from Karpathy's HackerTube with Cursor

    <p>On 1 Nov, Andrej Karpathy shared HackerTube (<a href="https://hackertube.org/" rel="noopener noreferrer">https://hackertube.org/</a>). He had Claude filter 43M Hacker News comments from 20 years down to 6,454 recommended videos, and he said the site took about 2 hours with Opu…

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