# Tool File Edit

> A file edit an agent asks to make: the path and line counts, the change as a diff with line numbers, the reason in one line, and Allow, Deny and Always allow before anything is written.

- Author: [Aadi](https://21st.dev/@aadixc0de)
- Library: [chatcn](https://21st.dev/@aadixc0de/library/chatcn)
- License: mit
- Tags: Agent, Code, Diff, Tool Call
- npm dependencies: @base-ui/react
- Live preview: https://21st.dev/@aadixc0de/components/tool-file-edit

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/aadixc0de/tool-file-edit?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/agent.md