Argo CD 3.6 makes progressive sync observable and broadens its health checks

Argo CD 3.6.0-rc1, released September 16, 2026, adds metrics and conditions to ApplicationSet progressive sync and expands the health-check library — CloudNativePG, cert-manager, Prometheus Operator, Kyverno. Teams that roll out changes in waves across clusters should plan the upgrade once the stable release lands.