diff --git a/deploy/infra/observability/prometheus.yml b/deploy/infra/observability/prometheus.yml
index e9aadf9f..40907dc4 100644
--- a/deploy/infra/observability/prometheus.yml
+++ b/deploy/infra/observability/prometheus.yml
@@ -32,11 +32,15 @@ scrape_configs:
   # game-cloud 要先挂 actuator/micrometer 让 /actuator/prometheus 端点成立;
   # nacos/rocketmq 的 micrometer 端点同样待各自 exporter 就位。端口按各服务实际暴露核对。
   # =========================================================================
-  # - job_name: game-cloud
-  #   metrics_path: /actuator/prometheus
-  #   static_configs:
-  #     - targets: ["100.64.0.X:PORT"]      # game-cloud 单体 actuator 端口(待定)
-  #
+  # game-cloud 单体 actuator（波② 已挂 actuator/micrometer，/actuator/prometheus 端点成立；T2-5 启用 2026-07-05）。
+  # dev 后端在 mini-desktop（100.64.0.7:48080），staging profile 已放行 /actuator/**（无鉴权可抓）；exposure 仅 health,prometheus。
+  - job_name: game-cloud
+    metrics_path: /actuator/prometheus
+    static_configs:
+      - targets: ["100.64.0.7:48080"]      # dev huijing-dev 单体 actuator（跨机 Tailscale）
+        labels:
+          env: dev
+
   # - job_name: nacos
   #   metrics_path: /nacos/actuator/prometheus
   #   static_configs: