codecrafters-io

build-your-own-x

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Master programming by recreating your favorite technologies from scratch.

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Created May 9, 20182,163 stars in the last 7 days
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Faundr

Build it with AI, without losing control.

Faundr keeps your project’s memory, blocks what can’t be undone and tells you if it’s safe to launch, inside Claude Code and Codex.