Claude Code Is Now '100% Written' By Claude Code: Creator Boris Cherny
Something that once sounded like science fiction just became engineering reality. Anthropic’s Boris Cherny — the creator of Claude Code — confirmed on X this week that the AI coding tool is now 100% written by itself. Not mostly. Not mostly-ish with some human help. One hundred percent. The post was simple: “Can confirm Claude Code is 100% written by Claude Code.” It has since surpassed 133,000 views, and for good reason: this is one of the clearest milestone moments of recursive AI improvement we’ve seen from a production system. ...