FA-927 / Reliability / Member archive

Admit a remote operation retry: A permanent rejection triggers another attempt · case 02

The retry admission operation is admitted even though a permanent rejection triggers another attempt.

Member previewVariant 2 · 3 implementations · 9 checks per implementation

Case contract

Return a Boolean admission decision for admit a remote operation retry. The record r must satisfy all of: r['retryable_result'] in [408,429,500,502,503,504]; r['attempt_budget'][0] < r['attempt_budget'][1]; r['remaining_deadline'][0]+r['remaining_deadline'][1] <= r['remaining_deadline'][2]; r['idempotency_safe'][0] or bool(r['idempotency_safe'][1]); r['retry_after'][0] >= r['retry_after'][1]. Extra tracing fields are ignored; validation does not mutate the record.

Why this case matters

A deterministic local contract for reliability. 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
A permanent rejection triggers another attempt	`true`	`false`	Failed

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