# Brian Sing — Portfolio

This site is Brian Sing's portfolio (product design, UX, case studies).

## Luther (AI)

Luther is the conversational AI on this site. Luther answers questions about Brian Sing's design work, experience, skills, and projects. It does not answer general knowledge questions.

### How to call Luther

- Endpoint: POST /api/ask
- Request body (JSON): { "question": "<string>", "history": [ { "role": "user"|"assistant"|"ai", "text": "<string>" }, ... ] }
- Response (JSON): { "answer": "<string>" }
- Usage is stateless: send the full conversation history with each request; the caller manages state.

When Upstash is configured, there is an IP rate limit (30 requests per minute). If not configured, no rate limit is applied at the server.