Update extra-tools README to reference 4-step auto installer

- Added 4-Step Auto Installer as recommended option for new users
- Clarified use cases for each installer option
- Reorganized installation recommendations by user scenario

extra-tools/README.md

@@ -31,13 +31,25 @@ This folder contains additional scripts that provide alternative workflows or sp
 
 ## 🚀 Recommended Installation
 
-For most users, use the **Interactive Installer**:
+**For new users or if you need Claude Code installed**, use the **4-Step Auto Installer** ⭐:
+
+```bash
+./auto-installer.sh
+```
+
+This will:
+1. Check if Claude Code is installed
+2. Install/configure using npx @z_ai/coding-helper
+3. Install all customizations (agents, skills, MCPs, plugins, hooks)
+4. Offer to launch Claude Code
+
+**For experienced users**, use the **Interactive Installer**:
 
 ```bash
 ./interactive-install-claude.sh
 ```
 
-For automated setups, use the alternative installer:
+**For customizations-only setup** (Claude Code already installed), use the extra-tools installer:
 
 ```bash
 ./extra-tools/install-claude-customizations.sh