GitHub Repository

Open source AI customer support agent with RAG. Upload your docs, get a chat widget with citations. Built on OnCell.

5 starsTypeScript

AI support chatbot with RAG and citations – one back end file, no infra

Name: AI support chatbot with RAG and citations – one back end file, no infra
Availability: InStock
Author: anupsing_ai

by anupsing_ai·Apr 15, 2026·9 points·0 comments

Visit Project View on HN

AI Analysis

●●SolidBig BrainShip It

One-file RAG chatbot backend when Chatbase and CustomGPT already dominate this space.

Strengths

•OnCell handles storage, search, and conversation history in isolated runtime environment
•Citations show which document each answer came from with clickable sources
•Docs chunked by headings for independently searchable sections

Weaknesses

•RAG support bots are extremely crowded with Chatbase, CustomGPT, and dozens more
•Architecture novelty relies entirely on OnCell platform rather than agent logic

Post Description

Upload markdown docs, get a support chatbot that answers with citations. The entire backend is one JS file — storage, search, and conversation history are handled by the runtime.

Stack: Next.js + OnCell + OpenRouter.

Demo: https://youtu.be/rWIU43pOH5Y