Claude Code Creator Boris Cherny Reveals How He Built the Future of AI Coding Boris Cherny didn't set out to build one of the most talked-about AI coding tools in the world. But today, Claude Code — the terminal-based agentic coding tool from Anthropic — is being used by engineers at Salesforce, NASA, Uber, Deloitte, and thousands of startups worldwide. And a staggering 90% of Claude Code's own codebase is written by Claude Code itself. In a special episode of Y Combinator's Lightcone podcast, Boris Cherny, the creator of Claude Code and Head of Claude Code at Anthropic, sat down to share the full story — from the accidental origin of the tool to his philosophy on building AI products, the future of software engineering, and advice for founders in the age of AI. This article breaks down everything Cherny revealed in that conversation, packed with insights every developer and founder needs to hear in 2026. Who Is Boris Cherny? The Man Behind Claude Code Boris Cher...