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Replay One Span, Not the Whole Run

This story is from 2026-10-18. It is preserved in the archive; the latest stories are on the live feed.

A failed agent run is usually cheaper to diagnose as a single span than as a whole re-run. Pull the span out of the trace, replay it twice, compare fingerprints. That one habit collapses 'it broke again' into a small, decidable answer: the world drifted, the tool is nondeterministic, or the model c…

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  1. 2026-10-18 07:37 · DEV Community — AI
    Replay One Span, Not the Whole Run

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