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Real Traffic Is the Only Benchmark: Replay Requests Before You Swap Models

This story is from 2026-08-23. It is preserved in the archive; the latest stories are on the live feed.

A demo passes. Production fails. That is the normal model swap story. Replay real traffic before you switch. A replay harness captures live requests. It sends them to a candidate model. Then it diffs the answers against production. This tutorial builds that harness in five verified stages. A repo t…

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  1. 2026-08-23 00:38 · DEV Community — AI
    Real Traffic Is the Only Benchmark: Replay Requests Before You Swap Models

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