Anthropic platform engineering lead says Claude now writes all the team's code

On a Tuesday local time, Katelyn Lesse, who leads Anthropic's platform engineering team, said at Grafana Labs' ObservabilityCON event that all of the code her team writes and maintains for its systems is written by Claude. IT之家 reported the remarks on October 22. Lesse oversees Anthropic's platform engineering group, whose scope includes the company's core services, developer tools and product infrastructure. According to Business Insider, the team had roughly 200 people this summer.

Under the arrangement Lesse described, engineers remain responsible for system design and verification, then hand the actual coding work to Claude, with their attention shifting toward system design, validation and code quality. During a large migration of a codebase from Python to Rust, team members built verification mechanisms to confirm the final output met expectations, while AI agents carried out much of the concrete work of developing, monitoring and validating code components.

The team has also begun letting AI agents fix tests on their own, and is exploring ways to allow agents to modify the codebase directly. The public account stops at Lesse's remarks at the event; the team has not disclosed how broadly the practice applies or what comes next.