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Install a replicated state snapshot: Corrupt snapshot contents become authoritative · case 05

The snapshot install operation is admitted even though corrupt snapshot contents become authoritative.

Member previewVariant 5 · 3 implementations · 9 checks per implementation

Case contract

Return a Boolean admission decision for install a replicated state snapshot. The record r must satisfy all of: r['newer_applied'][0] >= r['newer_applied'][1]; set(r['complete_chunks'][0]) == set(range(r['complete_chunks'][1])); r['checksum_match'][0] == r['checksum_match'][1]; bool(r['configuration_present']); r['index_term_pair'][0] == r['index_term_pair'][1]. Extra tracing fields are ignored; validation does not mutate the record.

Why this case matters

A deterministic local contract for replication. 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
Corrupt snapshot contents become authoritative	`true`	`false`	Failed

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