Diff Evidence Bundles

Each side is classified the way the estate's verification desk classifies inputs: an OCG artifact (object carrying an execution_hash), a chain (step-artifact array or an object with a steps array), an evidence bundle (subject_hash without execution_hash, with reviewer, approver, annotation or timestamp members) or a records array; anything else is refused with a named reason. The accountability section normalizes legacy records arrays, embedded sign_off members and the converged evidence-bundle shape to the same comparison keys, so a shape migration alone never surfaces as a diff row. The verdict is taken from verification_result first, then explicit verdict-family fields, then derived from a checks array; regressed marks a move toward fail, reject or hold. The as_of field supplies the clock reading for override freshness and is required whenever an override record is present (the kernel takes no wall-clock input). Nesting is capped at 200 levels.

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