HOW CLAUDE CODE IS BUILT

Summary from the TLDR Web Dev newsletter

This article provides a look into the development of Claude Code, a popular AI-powered developer tool that generates over $500M in annual revenue. The tool originated from a simple command-line tool using Claude to identify music, then evolved into a sophisticated product with a tech stack including TypeScript, React, Ink, Yoga, and Bun, with 90% of the code written by itself. Claude Code's success is attributed to its rapid development pace, with features built and shipped in days. The team uses AI agents extensively for code reviews and tests.