# Reasoning Thread

> AI chat thread that shows its work: streaming reasoning that folds when done, tool steps with state, timing and results, then the answer with a caret. A live region, springs off under reduced motion. From the AI Assistant Kit → ai.osagi.finance/kits/ai-assistant

- Author: [OSAGI](https://21st.dev/@konsstepnov)
- License: mit
- Tags: AI Chat, Agent, Reasoning, Streaming, Tool Call
- npm dependencies: clsx, motion, lucide-react, tailwind-merge
- Live preview: https://21st.dev/@konsstepnov/components/reasoning-thread

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/konsstepnov/reasoning-thread?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/ai-chat.md