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Swap One Seam, Dual-Run Both Implementations, Then Delete the Old Path

The smallest safe refactor is one seam swap. Not a module rewrite. Swap the call site, run both implementations on the same inputs, compare, then delete. This post covers three parts. A dual-run harness. A gate that fails on unlabeled mismatches. A triage step for the ledger. Core rule: a mismatch…

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  1. 2026-11-07 03:51 · DEV Community — AI
    Swap One Seam, Dual-Run Both Implementations, Then Delete the Old Path

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