diff --git a/config/platform-infra/public-edge.yaml b/config/platform-infra/public-edge.yaml
index 3285886e..9062275a 100644
--- a/config/platform-infra/public-edge.yaml
+++ b/config/platform-infra/public-edge.yaml
@@ -66,6 +66,7 @@ targets:
         caddyfilePath: /opt/unidesk/pikaoa-edge/Caddyfile
       dnsServers:
         - 10.43.0.10
+      # 共享入口包含长耗时流式 API，首响应头预算统一按 10 分钟配置。
       responseHeaderTimeoutSeconds: 600
     sites:
       - id: artifact-registry