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Persisted client snapshot admission: Nullable persisted value · case 02

Nullable persisted value.

Member previewVariant 2 · 3 implementations · 60 checks per implementation

Case contract

Persist only declared nontransient keys. Missing defaults are filled without replacing null/falsy data. Older schema versions migrate through each intermediate step; future versions stay read-only and keep their version stamp. Operation nullable-persisted-value has the six explicit input/output oracles below.

Why this case matters

An offline client lifecycle model that isolates a state-management defect without DOM rendering or network services.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
nullable-persisted-value scenario 3	`2`	`null`	Failed

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