8a67c11decb774886d4ec03efc651c7f0b2741a7
kube-prometheus-stack's Prometheus resource has ruleSelector matchLabels: release=kube-prometheus-stack. Without this label the PrometheusRule was created in-cluster but never loaded into Prometheus — dead silent alerts. Verified post-fix that the rule appears in /api/v1/rules. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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