diff --git a/observability/prometheus.yml b/observability/prometheus.yml
index 04ae992..e496e26 100644
--- a/observability/prometheus.yml
+++ b/observability/prometheus.yml
@@ -24,10 +24,16 @@ scrape_configs:
 
   # Agent Governance Demo：scrape Pushgateway（Demo CLI push 進來的 counter）
   - job_name: "agent-governance"
+    scrape_interval: 5s
     honor_labels: true
     static_configs:
       - targets: ["host.docker.internal:9091"]
 
+  # OPA server 原生 /metrics（含決策延遲 histogram）
+  - job_name: "opa"
+    static_configs:
+      - targets: ["host.docker.internal:8181"]
+
   # - job_name: "redis"
   #   static_configs:
   #     - targets: ["redis_exporter:9121"]