Sean Fang
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SeanGPT

May 2025 – Jul 2025

seanfang.click

SeanGPT is a retrieval interface over my Obsidian vault of college notes — the same notebook linked from the homepage. The vault syncs from GitHub into a vector database on every push, so the model always answers against my latest notes.

  • Built a RAG pipeline (FastAPI + LangChain) that ingests the Obsidian vault into a ChromaDB vector store on each push, enabling natural-language Q&A over my notes with OpenAI embeddings and GPT-4 / Claude.
  • Dockerized and deployed to AWS ECS with Route 53 via CI/CD, cutting deployment time by 70% and query costs by 80%.