FA-080 / Distributed coordination / Member archive

Read repair resurrects a deleted record · case 05

A surviving old value wins because the merge removes deletion markers before comparing versions.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

Records are [version,kind,value] with kind put or delete. Return the latest value or None when the latest record is a deletion; deletion wins an equal-version put/delete tie. Equal-version put values are assumed identical; the model has no wall-clock conflict resolution.

Why this case matters

Models anti-entropy repair between replicas retaining different parts of a delete/recreate history.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
new delete suppresses stale put	`"old"`	`null`	Failed

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