An MVP can be lightweight, but it can’t be fragile. This reliability baseline is the minimum set of checks that prevent avoidable outages, data loss, and security incidents while you iterate quickly: (1) measure the core journey, (2) centralized logs + correlation IDs, (3) health checks + safe deploys, (4) SLOs for critical endpoints, (5) backups + restore drills, (6) security basics, (7) runbooks + on-call readiness.