Anthropic has published an oral history detailing the internal origins of Claude Code, revealing that the coding assistant traces back to a VS Code extension built in 2022, before evolving through an internal tool called "clide" and a demo dubbed "Claude CLI" ahead of its February 2025 launch.
According to interviews with the Anthropic team, work on autonomous software engineering began in earnest in early 2022, when the company built reinforcement learning infrastructure for coding agents, building on groundwork laid by research engineer Dawn Drain.
Claude Code head Boris Cherny built a demo called "Claude CLI" in 2024 after joining the Labs team, initially receiving a muted reception internally before development accelerated. The tool was renamed Claude Code, a suggestion from product marketing's Alex Isken, ahead of its research preview launch in February 2025.
