Four invariants under every deploy
1
Observability before scale
Every service ships with dashboards, alerts, and a runbook before it handles a single request.
2
Rollback in under ninety seconds
Canary deploys gate every release; mean time to recovery held under 87 s for the last eleven months.
3
One artifact, many environments
The same SHA that passes staging never gets rebuilt for production. Immutability is the contract.
4
Incidents close with a code change
Postmortems produce a linked pull request within 48 hours or the incident stays open indefinitely.