FA-385 / Consensus / Member archive

Transfer leadership to a chosen voter: The target lacks the leader final log entry · case 05

The leader transfer operation is admitted even though the target lacks the leader final log entry.

Member previewVariant 5 · 3 implementations · 9 checks per implementation

Case contract

Return a Boolean admission decision for transfer leadership to a chosen voter. The record r must satisfy all of: r['target_voter'][0] in r['target_voter'][1]; r['log_caught_up'][0] >= r['log_caught_up'][1]; r['transfer_term'][0] == r['transfer_term'][1]; r['transfer_deadline'][0] < r['transfer_deadline'][1]; r['writes_drained'] == 0. Extra tracing fields are ignored; validation does not mutate the record.

Why this case matters

A deterministic local contract for consensus. Each negative fixture violates exactly one invariant. No transport timing, persistence, cryptographic verification, or full protocol implementation is claimed.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
The target lacks the leader final log entry	`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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