AI Writes 65% of Code

Could an AI assistant write most of its own code? Anthropic's Claude code team revealed that their collaborative Slack integration, ClawTag, now lands 65% of the team's product engineering pull requests.

This high level of automation is part of an internal strategy called "antfooding," where features ship to Anthropic employees first and only release publicly if they prove to keep users hooked. While humans still manually review critical changes, the team increasingly relies on automated code reviews for the outer layers of the This shift in development comes as the models themselves require less handholding to perform complex tasks.

According to team members Kat Wu and Tharik Shahapar, the Claude code system prompt recently shrunk in size by 80%. They noted that adding examples or long lists of negative rules to system prompts is no longer best practice for newer models like Fable-5 or Opus 4.8, as it can actually reduce the quality of the results.

Instead, the team is leaning into autonomous modes, with ClawTag managing its memory through simple, channel-specific Markdown files.