AI support agent over your docs

Build a chat widget that answers customer questions from your own docs.

Core features:
1. Ingest docs (URLs, markdown, PDFs) and embed with OpenAI
2. Chat widget embeddable via one <script> tag
3. Retrieval + streamed answer with citations
4. Escalate to human (create ticket) when confidence is low
5. Admin dashboard: unanswered questions, thumbs down

Data: sources, chunks, embeddings, conversations.
Must-haves: rate limiting per site, per-workspace API key, dark/light theme.