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Would your RAG eval suite notice if someone weakened the prompt?

This story is from 2026-09-01. It is preserved in the archive; the latest stories are on the live feed.

You have a RAG eval suite. Probably faithfulness and answer-relevancy — the two metrics almost every RAG suite starts with. It's green in CI. Here's a question that suite can't answer for you: if someone weakened your system prompt next week — inverted "do not invent facts," dropped "cite the sourc…

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  1. 2026-09-01 18:19 · DEV Community — Machine Learning
    Would your RAG eval suite notice if someone weakened the prompt?

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