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    • build-your-own-claude-code

      Public
      Definition for the claude-code challenge.
      Shell
      35026Updated Feb 23, 2026Feb 23, 2026
    • course-sdk

      Public
      A rewrite of course-sdk, with better developer ergonomics
      TypeScript
      237921Updated Feb 23, 2026Feb 23, 2026
    • shell-tester

      Public
      Tester for the shell challenge.
      Go
      57010Updated Feb 23, 2026Feb 23, 2026
    • build-your-own-shell

      Public
      Definition for the shell challenge.
      Shell
      173607Updated Feb 23, 2026Feb 23, 2026
    • language-templates

      Public
      Dockerfile
      8502Updated Feb 23, 2026Feb 23, 2026
    • cli

      Public
      CodeCrafters CLI to run tests
      Go
      121981Updated Feb 23, 2026Feb 23, 2026
    • frontend

      Public
      Rebuild complex systems from scratch
      TypeScript
      28109518Updated Feb 23, 2026Feb 23, 2026
    • claude-code-tester

      Public
      Tester for the claude-code challenge.
      Go
      0000Updated Feb 23, 2026Feb 23, 2026
    • homebrew-tap

      Public
      Homebrew Tap
      Ruby
      1100Updated Feb 22, 2026Feb 22, 2026
    • build-your-own-x

      Public
      Master programming by recreating your favorite technologies from scratch.
      Markdown
      44k468k233197Updated Feb 21, 2026Feb 21, 2026
    • llm-rules-test

      Public
      Custom runner for LLM rules that help validate stage instructions
      TypeScript
      1100Updated Feb 19, 2026Feb 19, 2026
    • build-your-own-git

      Public
      Definition for the git challenge.
      Shell
      2513046Updated Feb 19, 2026Feb 19, 2026
    • language-dashboard

      Public
      Language dashboard for CodeCrafters challenges.
      Python
      21400Updated Feb 19, 2026Feb 19, 2026
    • docs

      Public
      Documentation for codecrafters users and contributors
      Ruby
      201910Updated Feb 17, 2026Feb 17, 2026
    • build-your-own-redis

      Public
      Definition for the redis challenge.
      Shell
      67295018Updated Feb 16, 2026Feb 16, 2026
    • build-your-own-interpreter

      Public
      Definition for the interpreter challenge.
      Shell
      175103Updated Feb 16, 2026Feb 16, 2026
    • build-your-own-sqlite

      Public
      Definition for the sqlite challenge.
      Shell
      3012412Updated Feb 16, 2026Feb 16, 2026
    • build-your-own-dns-server

      Public
      Definition for the dns-server challenge.
      Shell
      142022Updated Feb 16, 2026Feb 16, 2026
    • build-your-own-grep

      Public
      Definition for the grep challenge.
      Shell
      142402Updated Feb 16, 2026Feb 16, 2026
    • build-your-own-http-server

      Public
      Definition for the http-server challenge.
      Shell
      3411522Updated Feb 16, 2026Feb 16, 2026
    • build-your-own-kafka

      Public
      Definition for the kafka challenge.
      Shell
      123807Updated Feb 16, 2026Feb 16, 2026
    • build-your-own-bittorrent

      Public
      Definition for the bittorrent challenge.
      C++
      188013Updated Feb 16, 2026Feb 16, 2026
    • binspec

      Public
      TypeScript
      65851Updated Feb 16, 2026Feb 16, 2026
    • Go
      7902Updated Feb 13, 2026Feb 13, 2026
    • ccbench

      Public
      A benchmark for coding agents
      Rust
      1810Updated Feb 12, 2026Feb 12, 2026
    • Go
      3200Updated Feb 12, 2026Feb 12, 2026
    • Go
      5200Updated Feb 12, 2026Feb 12, 2026
    • Tester for the "Build your own BitTorrent" challenge
      Go
      4600Updated Feb 8, 2026Feb 8, 2026
    • Tester for the interpreter challenge.
      Go
      5511Updated Feb 8, 2026Feb 8, 2026
    • Go
      8906Updated Feb 8, 2026Feb 8, 2026