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Master programming by recreating your favorite technologies from scratch.
Markdown 468k 43.8k
Companies that support engineers with learning stipends
373 34
Definition for the redis challenge.
Shell 294 67
Definition for the sqlite challenge.
Shell 124 30
Definition for the shell challenge.
Rebuild complex systems from scratch
CodeCrafters CLI to run tests
Homebrew Tap
Tester for the claude-code challenge.
Tester for the shell challenge.
Custom runner for LLM rules that help validate stage instructions
Definition for the claude-code challenge.
Definition for the git challenge.