Retrieval Engineering

The retrieval half of RAG at professional depth: chunking strategies including hierarchical, embedding model selection, hybrid search with rerankers, query expansion and decomposition, and function-calling retrieval through MCP.

Content current as of 2026-10.

Lessons

1. Chunking strategies that decide answer quality
2. Embeddings, hybrid search, and rerankers
3. Query expansion, decomposition, transformation
4. Retrieval as a tool: function calling and MCP clients

Sources

• AIP-C01 exam guide — Content Domain 1 (task 1.5)
• Amazon Bedrock user guide — reranker models
• Amazon Bedrock model card — Titan Text Embeddings V2
• Amazon Bedrock user guide — query configuration and decomposition