Why: The first pg-stop window counted an in-flight 200 at shutdown, and five writes on the timeline conversation returned 409 while a mock run held it. That measured the probe, not a proven database failure.
Evidence: go test ./... in tests/ops/drill_driver passed locally (SELF).
Impact: The outage clock starts 2s after stop or kill. RTO is five writes on new conversations. Idempotency replays only the window and retries 409 for up to 2 minutes. The Redis phase no longer uses local outside a function.
Refs: feature/u7-ops-drills
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: The release checklist cannot mark disconnect recovery until an isolated drill records bounded failures, no SQLite fallback, and idempotent writes.
Evidence: bash -n passed, drill_driver go test passed, unknown arguments exit 2. The timed drill is recorded next.
Impact: New drill entry only. No product change and no release decision.
Refs: docs/release-multi-instance.md C4
Co-authored-by: Cursor <cursoragent@cursor.com>
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