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Engineering Blueprint

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Build Retrieval Augmented Generation Systems

0May 2026

Techniques for enhancing Claude with domain-specific knowledge using RAG, including contextual embeddings and re-ranking.

What problem does this solve?

Demonstrates how to augment Claude's responses with external knowledge, removing hallucinations for fact-dependent tasks. The guide covers RAG system architecture, performance optimization techniques like summary indexing and re-ranking, and building evaluation suites to measure precision, recall, and accuracy.

How does it work?

  1. Prepare your knowledge base and chunk documents. 2. Choose a retrieval strategy (semantic search, BM25, or both). 3. Optionally apply contextual embeddings to add context to chunks before retrieval. 4. Integrate retrieval into Claude prompts and measure accuracy with evaluation datasets. Output: a production-grade RAG pipeline with measured performance metrics.

Included Skills

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What's required to run this?

Includes sample data from Anthropic documentation. Evaluation uses Promptfoo config files for automated testing.

Key Features

Summary indexing

Improve retrieval precision by indexing summaries instead of raw chunks

Contextual embeddings

Solve context-loss in chunked retrieval by embedding chunks with surrounding context

Re-ranking strategies

Post-filter retrieved documents to boost relevant results to the top

Evaluation suite

Measure RAG accuracy with Promptfoo datasets covering single-hop and multi-hop queries

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