Update README with 4-step auto installer documentation

- Added Option 2: 4-Step Auto Installer (Recommended)
- Documented the 4-step flow with detailed explanations
- Reorganized installation options (now 4 options total)
- Added benefits list for auto installer

README.md

@@ -200,7 +200,34 @@ claude
 
 ---
 
-### Option 2: Interactive Installation Script
+### Option 2: 4-Step Auto Installer (Recommended) ⭐
+
+**Automated installation with 4-step flow:**
+
+```bash
+git clone https://github.rommark.dev/admin/claude-code-glm-suite.git
+cd claude-code-glm-suite
+chmod +x auto-installer.sh
+./auto-installer.sh
+```
+
+**The 4-Step Flow:**
+1. **Check Installation Status** - Detects if Claude Code is already installed
+2. **Install/Configure** - Uses `npx @z_ai/coding-helper` to install or configure Claude Code for Z.AI GLM 4.7 Model
+3. **Install Modifications** - Installs all 38+ agents, MCP tools, skills, plugins, and hooks
+4. **Launch Claude** - Offers to start the upgraded Claude Code immediately
+
+**Benefits:**
+→ ✅ Fully automated 4-step process
+→ ✅ Intelligent detection of existing installation
+→ ✅ Z.AI GLM 4.7 Model configuration built-in
+→ ✅ Comprehensive installation of all modifications
+→ ✅ Tested with TDD (10 tests passing)
+→ ✅ Error handling and backup system
+
+---
+
+### Option 3: Interactive Installation Script
 
 ```bash
 git clone https://github.rommark.dev/admin/claude-code-glm-suite.git
@@ -217,7 +244,7 @@ chmod +x interactive-install-claude.sh
 
 ---
 
-### Option 3: Manual Installation
+### Option 4: Manual Installation
 
 For users who want complete control over each component, follow these steps manually: