diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 444a9e2..0e01d6a 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -6,7 +6,7 @@
   },
   "metadata": {
     "description": "Skills shared by Baoyu for improving daily work efficiency",
-    "version": "1.18.0"
+    "version": "1.18.1"
   },
   "plugins": [
     {
diff --git a/CHANGELOG.md b/CHANGELOG.md
index aa2204c..7cab8c8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 English | [中文](./CHANGELOG.zh.md)
 
+## 1.18.1 - 2026-01-23
+
+### Documentation
+- `baoyu-slide-deck`: adds detailed sub-steps (1.1-1.3) to progress checklist, marks Step 1.3 as required with explicit Bash check command for existing directory detection.
+
 ## 1.18.0 - 2026-01-23
 
 ### Features
diff --git a/CHANGELOG.zh.md b/CHANGELOG.zh.md
index a7afe59..7712de8 100644
--- a/CHANGELOG.zh.md
+++ b/CHANGELOG.zh.md
@@ -2,6 +2,11 @@
 
 [English](./CHANGELOG.md) | 中文
 
+## 1.18.1 - 2026-01-23
+
+### 文档
+- `baoyu-slide-deck`：进度清单新增详细子步骤（1.1-1.3），标记 Step 1.3 为必须步骤并提供明确的 Bash 检查命令用于检测已存在目录。
+
 ## 1.18.0 - 2026-01-23
 
 ### 新功能
diff --git a/skills/baoyu-slide-deck/SKILL.md b/skills/baoyu-slide-deck/SKILL.md
index 752f360..0a0e35c 100644
--- a/skills/baoyu-slide-deck/SKILL.md
+++ b/skills/baoyu-slide-deck/SKILL.md
@@ -166,6 +166,9 @@ Copy this checklist and check off items as you complete them:
 ```
 Slide Deck Progress:
 - [ ] Step 1: Setup & Analyze
+  - [ ] 1.1 Load preferences
+  - [ ] 1.2 Analyze content
+  - [ ] 1.3 Check existing ⚠️ REQUIRED
 - [ ] Step 2: Confirmation ⚠️ REQUIRED (Round 1, optional Round 2)
 - [ ] Step 3: Generate outline
 - [ ] Step 4: Review outline (conditional)
@@ -229,9 +232,15 @@ Schema: `references/config/preferences-schema.md`
 5. Determine recommended slide count
 6. Generate topic slug from content
 
-**1.3 Check Existing Content**
+**1.3 Check Existing Content** ⚠️ REQUIRED
 
-Check if `slide-deck/{topic-slug}/` directory already exists.
+**MUST execute before proceeding to Step 2.**
+
+Use Bash to check if output directory exists:
+
+```bash
+test -d "slide-deck/{topic-slug}" && echo "exists"
+```
 
 **If directory exists**, use AskUserQuestion: