Claude Coding Errors Drop to 3% With 12 Rules After Karpathy's Complaint, Tested on 30 Repos
After Andrej Karpathy's January 2026 complaint about Claude's coding habits, developer Forrest Chang distilled 4 rules into CLAUDE.md. Later, another developer added 8 rules to cover agent conflicts and hook chains, slashing error rate from 41% to 3% across 30 codebases in 6 weeks.








