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shadow mode

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    Shadow mode should be a default in software deployment●🆕 Shadow mode as a default, not a luxury Run the new implementation beside the old on real traffic, with every side effeMmastodonWorldImmigration41 d ago

    A software engineering writer argues that shadow mode—running a new implementation alongside the old one on real traffic with all side effects suppressed—should be standard practice rather than an optional extra. The argument is that contract tests verify the shape of a system, but shadow mode is what proves its actual behaviour before full rollout.