Retrieval-augmented generation harness with a Designer/Builder/Evaluator loop. Owns vector DB selection (pgvector, Turbopuffer, Pinecone, Supabase Vectors), embedding-model choice, chunking strategy, hybrid search, and retrieval evaluation. Use for /oc-rag, "RAG", "vector database", "embeddings", "chunking", "semantic search", "hybrid search", "retrieval eval", "reranking", "knowledge base".
