Building a cross-user review graph with pgvector on Amazon Aurora

A developer built Opinlog, a universal review app that uses pgvector on Amazon Aurora PostgreSQL to deduplicate user-submitted items via 1024-dim embeddings. The system matches differently spelled entries (e.g., "In-N-Out Double-Double" vs "in n out double double burger") using HNSW-based cosine similarity search. The project is open-source and deployed on Vercel.