Master programming by recreating your favorite technologies from scratch.
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Companies that support engineers with learning stipends
423 39
Definition for the redis challenge.
Shell 366 84
Definition for the sqlite challenge.
Shell 156 39
Tester for the claude-code challenge.
Definition for the claude-code challenge.
Language dashboard for CodeCrafters challenges.
Rebuild complex systems from scratch
A rewrite of course-sdk, with better developer ergonomics
Definition for the dns-server challenge.
Definition for the shell challenge.