I Read Boris Cherny's 30-Day Claude Code Stat. Here's What Most Takes Get Wrong.

Boris Cherny, Head of Claude Code at Anthropic, posted a stat on X this morning. In the last 30 days, 100% of his contributions to Claude Code were written by Claude Code itself. 259 PRs. 497 commits. 40,000 lines added. 38,000 removed. Zero by the head of the team. Most reads of this go straight to "AI-assisted dev productivity is real." That's the obvious layer. It's not the interesting one. The Engineering Leadership Read If you run a team in 2026 - staff+ engineer or EM or director - the dat