# Thinking

> A collapsible disclosure that shows an AI agent's reasoning before its answer, collapsed by default and showing a live caret while the reasoning is still streaming in.

- Author: [keshon](https://21st.dev/@keshon)
- Library: keshon
- License: MIT
- Tags: Thinking, Reasoning, Disclosure, Accordion, Agent
- Live preview: https://21st.dev/@keshon/components/thinking

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/keshon/thinking?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/thinking.md