FA-10508 / Caching / Member archive

An older refresh completion overwrites a newer cached representation · case 03

An older refresh completion overwrites a newer cached representation.

Member previewVariant 3 · 3 implementations · 4 checks per implementation

Case contract

Entries are [globally comparable integer version,value]. Install incoming only when its version is strictly greater; equal or older completions preserve current state.

Why this case matters

A deterministic cache state transformation. Inputs are copied or treated as immutable; no remote storage, real clock, or concurrent interleaving is simulated.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`[2, "old"]`	`[3, "new"]`	Failed

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