RAG

Reranking for two-stage RAG retrieval, from cross-encoders to TypeSafe's Jev: how it works, its limits, a 90-query evaluation, agent integration, and a prompt-injection guard.

Master vector search with pgvector in PostgreSQL. Covers embedding fundamentals, similarity metrics, IVFFlat vs HNSW indexes, database selection, and complete Bun/TypeScript implementation for AI-powered semantic search applications.