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My AI agent failed obvious tasks, and 49% fewer retrieval misses changed how I debugged it

This story is from 2026-09-21. It is preserved in the archive; the latest stories are on the live feed.

I used to blame the model. If an agent missed a refund rule, forgot a tool result from 10 seconds ago, or grabbed the wrong SKU from docs, I’d assume GPT-5 or Claude had a reasoning problem. I don’t think that anymore. A lot of "agent is dumb" bugs are retrieval bugs. That sounds obvious in hindsig…

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  1. 2026-09-21 22:09 · DEV Community — AI
    My AI agent failed obvious tasks, and 49% fewer retrieval misses changed how I debugged it

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