Each driver is real-service code only (no test awareness; tests inject just an
HTTPClient/Bin), following the established patterns:
- mongo: in-place changeUserPassword over the old connection; no secret on argv
(host/db on the URI, both passwords on stdin, output scrubbed).
- npm: create token -> /-/whoami -> delete-by-key; blob records the key.
- gcp: service-account KEY rotation; mints an RS256 JWT signed with the SA's
own private key (crypto/rsa, stdlib) to self-auth the IAM create/verify/delete.
- twilio: API Key create -> get -> delete, Basic auth (KeySid/secret).
- flyio: GraphQL — a managing token mints/deletes the rotated deploy token.
- k8s: create a service-account-token Secret, await the populated token,
verify against the SA, delete the old Secret (invalidates the old token).
All 6 register their honest proof level (MOCK-ONLY) in proofs.go +
ROTATION-PROOFS.md; mongo/npm/k8s are LIVE-VM candidates pending real-target VM
POCs. Emulators enforce credential validity (gcp verifies the JWT signature),
tests assert Verify(old) fails after revoke + a secret-leak canary.
Full suite: 103 green, -race clean on rotate/sink/vault.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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