FA-070 / Distributed coordination / Member archive

Duplicate or foreign ballots manufacture a quorum · case 05

A coordinator declares a decision after counting retries or ballots from outside the membership.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Members define a fixed nonempty voting configuration. Return whether distinct eligible voter IDs number at least floor(member count/2)+1; an empty configuration cannot reach quorum.

Why this case matters

Models quorum accounting independently of transport delivery multiplicity. It deliberately omits cryptographic authentication and joint-consensus membership changes.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
retransmitted single ballot	`true`	`false`	Failed

MEMBER ARCHIVE

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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