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What are instruction-tuned embeddings, and why do query and passage prefixes matter?

Modern embedding models want a task instruction prepended to the text, and getting the prefix wrong quietly wrecks retrieval. The signal is why instructions help and the asymmetric query/passage convention.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Modern embedding models want a task instruction prepended to the text, and getting the prefix wrong quietly wrecks retrieval. The signal is why instructions help and the asymmetric query/passage convention.

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