Simon Willison first-party · 3d ago · 2/5
Claude system prompts as a git timeline ↗
Simon Willison created a git-based timeline visualization of Claude system prompts by converting Anthropic's published prompt documentation into separate versioned files. He used Claude Code to automate the conversion and assigned fake commit dates to enable browsing changes through GitHub's interface. The project enables detailed analysis of prompt evolution, such as differences between Claude Opus 4.6 and 4.7.
Anthropic publish the system prompts for Claude chat and make that page available as Markdown. I had Claude Code turn that page into separate files for each model and model family with fake git commit dates to enable browsing the changes via the GitHub commit view.