What I learned building a RAG notes app
Embeddings, vector search, reranking, and getting Flutter, Spring Boot and Python to talk to each other
Series
Building Cortex: A RAG Notes App
I got curious about how RAG really works, so I built Cortex, a notes app that answers questions from your own notes. This series is what I learned on the way: embeddings, vector search with pgvector, hybrid search and reranking, testing the answers, and keeping personal data safe. Flutter app, Spring Boot API, Python AI service.
