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Your RAG Pipeline Is Probably Broken Upstream Of Retrieval

This story is from 2026-09-08. It is preserved in the archive; the latest stories are on the live feed.

Most teams debugging a retrieval system start in the same place. Chunk size, embedding model, top-k, the prompt. Those knobs are visible, they are easy to change, and changing one produces a different answer, which feels like progress. Meanwhile the thing that actually set the ceiling on the whole…

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  1. 2026-09-08 16:17 · DEV Community — AI
    Your RAG Pipeline Is Probably Broken Upstream Of Retrieval

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