FA-1178 / Workflow orchestration / Member archive
Deliver a signal to a durable workflow: Duplicate signal delivery applies the external command twice · case 03
The workflow signal operation is admitted even though duplicate signal delivery applies the external command twice.
Case contract
Return a Boolean admission decision for deliver a signal to a durable workflow. The record r must satisfy all of: r['signal_identity'][0] not in r['signal_identity'][1]; r['recipient_run'][0] == r['recipient_run'][1]; r['signal_declared'][0] in r['signal_declared'][1]; r['mailbox_capacity'][0] < r['mailbox_capacity'][1]; r['sequence_dependency'][0] <= r['sequence_dependency'][1]. Extra tracing fields are ignored; validation does not mutate the record.
Why this case matters
A deterministic local contract for workflow orchestration. Each negative fixture violates exactly one invariant. No transport timing, persistence, cryptographic verification, or full protocol implementation is claimed.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| Duplicate signal delivery applies the external command twice | true | false | Failed |
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