# AI Prompt Diff

> Compound component that compares two system prompts with unified or side-by-side diff views, added/removed line highlighting, line numbers, and copy buttons.

- Author: [Cameron Kelliher](https://21st.dev/@elements-)
- License: no-license
- Tags: Comparison, AI, Diff, Prompt, Code Diff
- npm dependencies: lucide-react
- Live preview: https://21st.dev/@elements-/components/prompt-diff

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/elements-/prompt-diff?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/comparison.md