AUDIT-WP-0005-T05 (progress). scripts/failure_matrix.py, make failure-matrix.
Two modes: MODE=local stands up PostgreSQL and the receiver in Docker and runs
all 15 scenarios including infrastructure disruption; MODE=remote targets a
deployed receiver and skips disruption unless DISRUPT=1, since restarting a
production database is not this script's call.
Rehearsed locally: 15 passed, 0 failed. Delivery and reconciliation, rejection
and dead-letter visibility, redaction with per-path counting, correlation
lookup, privilege separation both directions, credential rotation mid-ingestion
with no delivery gap, operator replay and duplicate replay, receiver
unavailability with sender retry, and a database restart mid-ingestion where 5
of 7 attempts were acknowledged and all 5 survived.
Two deliberate choices. Stored-record counts are read straight from the
database rather than through the API, because the assertion is about what is
stored and asking the service to vouch for itself is weaker evidence. The
retry policy retries 503/500 and treats 400/401/403/409 as terminal, which is
the documented response contract - so what is under test is a sender that
follows it.
Harness credibility checked rather than assumed: exit 0 on success, exit 2
against an unreachable receiver rather than passing silently, and the evidence
JSON carries no tokens, credentials or event payloads so it can go to
NK-WP-0024 as-is.
The local rehearsal is not a substitute for the live run: it does not exercise
CNPG failover, NetworkPolicy enforcement, or OpenBao-leased credentials.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
tegwick
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