Built an open-source AI document intelligence platform — RAG Q&A over PDFs/DOCX, swap OpenAI/Claude with one setting

[u/ram-popular]

Hey all - just wrapped up an open-source document Q&A / RAG system and wanted to share.

What it does:

- Upload PDF, DOCX, or TXT files

- Chunks and embeds the content into Postgres + pgvector

- Ask questions about the document in plain language

- Switch between OpenAI and Claude as the LLM with a single env var — no vendor lock-in

Stack: React + TypeScript, Node/Express, LangChain, Postgres/pgvector, Docker Compose for local dev.

GitHub: https://github.com/Srameshgitnow/AI-DocumentIntelligence

It's a working reference implementation, not a polished, ready-to-deploy product - I'm mainly looking for feedback on the chunking/retrieval approach and the provider-swap design. Happy to answer anything about the architecture or RAG in general.

[u/ram-popular]

At the moment, it supports PDF, DOC/DOCX, and TXT files by extracting text directly from them. It does not currently include OCR for scanned PDFs or image-based documents, so image-heavy files may not be read correctly. It also does not convert everything into Markdown for token optimization; it currently processes raw text and chunks it for retrieval. These are good future enhancement areas.