10 lines
576 B
Markdown
10 lines
576 B
Markdown
# Shadow and dual read
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Shadow targets are separate storage identities and are exposed only to evaluation/admin or an
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explicit project shadow route. Ordinary production consumers continue using the current binding.
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Compatible adapters may execute one request against current and shadow, but persist only result IDs,
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metrics, latency, errors and evidence references—not content.
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Shadow completion records a `MigrationShadowSession`. Success reaches `READY_FOR_CUTOVER`; it never
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switches traffic. An isolated technical verdict and project-promotion verdict remain distinct.
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