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Client offline mutation outbox: Acknowledged prefix barrier · case 03

Acknowledged prefix barrier.

Member previewVariant 3 · 3 implementations · 60 checks per implementation

Case contract

The client outbox is an ordered UI mutation log; commands use identity, not payload truthiness. Cancellation/acknowledgment remove only matching commands, offline mode retains unsent work, and a zero send budget sends nothing. Operation acknowledged-prefix-barrier 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
acknowledged-prefix-barrier scenario 5	`1`	`0`	Failed

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