Boris Cherny

@bchernytwitterFeatured

Creator of Claude Code at Anthropic. First-hand insights on AI-assisted development and agent architecture.

agent-architectureai-native-apps

1 insight

Claude Code Is Now 100% Written by Claude Code — 259 PRs, 497 Commits

3 min27 Feb 2026

Anthropic's Claude Code is now entirely self-written — 259 PRs and 497 commits authored by Claude Code running on Opus 4.5. New commands /simplify and /batch bring parallel agents into everyday code quality and migration workflows. This marks a shift from AI-assisted coding to AI-operated software development.

claude-codeagentic-engineeringdeveloper-toolsai-transformation