diff --git a/docs/acp_kiro.md b/docs/acp_kiro.md
index 592429b..023fcbf 100644
--- a/docs/acp_kiro.md
+++ b/docs/acp_kiro.md
@@ -1,3 +1,8 @@
+---
+last_validated: 2026-04-09
+validated_by: masami-agent
+---
+
 # OpenClaw × ACP × Kiro 整合指南
 
 讓你的 OpenClaw 透過 ACP 轉接 Kiro，實現對話持久化。
diff --git a/docs/acpx-harness.md b/docs/acpx-harness.md
index a8e9dba..819bfdd 100644
--- a/docs/acpx-harness.md
+++ b/docs/acpx-harness.md
@@ -1,3 +1,8 @@
+---
+last_validated: 2026-04-09
+validated_by: masami-agent
+---
+
 # ACPX Harness
 
 ## ACPX Harness 是什麼
diff --git a/docs/linux_systemd.md b/docs/linux_systemd.md
index 0488c99..e27ffcc 100644
--- a/docs/linux_systemd.md
+++ b/docs/linux_systemd.md
@@ -1,3 +1,8 @@
+---
+last_validated: 2026-04-09
+validated_by: masami-agent
+---
+
 # Linux（systemd）上的 OpenClaw Gateway：重啟、Port 衝突與 Model 設定踩坑
 
 ## TL;DR
diff --git a/docs/nodes.md b/docs/nodes.md
index 302fae6..b349e36 100644
--- a/docs/nodes.md
+++ b/docs/nodes.md
@@ -1,3 +1,8 @@
+---
+last_validated: 2026-04-09
+validated_by: masami-agent
+---
+
 # OpenClaw Nodes 深度解析
 
 ## 概述
diff --git a/docs/pricing_howto.md b/docs/pricing_howto.md
index df3f5b6..16b51b2 100644
--- a/docs/pricing_howto.md
+++ b/docs/pricing_howto.md
@@ -1,3 +1,8 @@
+---
+last_validated: 2026-04-09
+validated_by: masami-agent
+---
+
 # How to Configure Model Pricing in OpenClaw
 
 OpenClaw doesn't include a built-in pricing database. Instead, you configure costs in your config file to match your actual provider expenses.