Claude Code System Prompts

Interactive web-based diff viewer to compare Claude Code system prompts across different versions.

Features

• Real-time prompt extraction from npm packages
• Side-by-side diff comparison with word-level highlighting
• GitHub-style UI with dark/light theme support
• Version selection with automatic latest version detection

View Online

🔍 View at claude-code-system-prompts.jonathanc.net

How it Works

The tool dynamically extracts system prompts from the @anthropic-ai/claude-code npm package across versions, providing an interactive diff viewer to track changes in Claude's system prompts over time.

Local Development

# Serve the files locally
python -m http.server 8000
# or
npx serve .

Open http://localhost:8000 in your browser.