Applied AI·Embeddings and retrieval
you prepend a line saying which document and section a chunk came from before embedding it, and chunks that were ambiguous alone start getting found.
Contextual retrieval
Draft summary, pending review
Prepending a short model-generated summary of where a chunk fits in its document before embedding it, so the chunk carries its own context. An Anthropic-published technique that measurably cuts retrieval failures on corpora where chunks are ambiguous in isolation.