diff --git a/.claude/settings.local.json b/.claude/settings.local.json
new file mode 100644
index 0000000..5557eae
--- /dev/null
+++ b/.claude/settings.local.json
@@ -0,0 +1,9 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(git add:*)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}
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diff --git a/.gitignore b/.gitignore
index 6f249aa..23d981c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,4 +68,4 @@ userprofiles/*/
 
 # Claude Code spezifische Dateien
 CLAUDE.md
-.claude/
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+.claude/
diff --git a/CLAUDE.md b/CLAUDE.md
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+++ b/CLAUDE.md
@@ -0,0 +1,97 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Repository Overview
+
+Collection of **Bash scripts for easyname Support Team** - small helpers for log analysis, automations, and typical support cases. Repository is **internal** for easyname Support.
+
+### Architecture
+
+Scripts are organized by platform:
+- **`legacy/`** - Scripts for Legacy infrastructure (contains `checkms`, `quicknav`)
+- **`wh20/`** - Scripts for WH20 infrastructure (currently empty, placeholder for future scripts)
+- **`connect/`** - Connection utilities (contains `go` SSH shortcut script)
+- **`userprofiles/`** - User-specific configuration files
+
+Each script follows a modular structure:
+```
+platform/<scriptname>/
+├── <scriptname>.sh    # The actual script
+└── README.md          # Documentation and examples
+```
+
+## Development Commands
+
+### Adding New Scripts
+
+```bash
+# 1. Create folder structure (legacy or wh20)
+mkdir -p legacy/<scriptname>
+
+# 2. Add script and make executable
+chmod +x legacy/<scriptname>/<scriptname>.sh
+
+# 3. Copy and adapt documentation template
+cp README_template.md legacy/<scriptname>/README.md
+
+# 4. Update platform README
+# Edit legacy/README.md or wh20/README.md
+```
+
+### Testing Scripts
+
+```bash
+# Test checkms (MS error code analysis)
+./legacy/checkms/checkms.sh --help
+./legacy/checkms/checkms.sh --show-config
+./legacy/checkms/checkms.sh 2024-01-15
+
+# Test go SSH shortcuts
+./connect/go/go.sh web 42
+./connect/go/go.sh mx 12
+```
+
+### Git Operations
+
+```bash
+# Commit changes
+git add .
+git commit -m "Add <scriptname> to <legacy|wh20>"
+git push origin main
+```
+
+## Core Scripts
+
+### `checkms` - Microsoft SMTP Error Analysis
+- Analyzes Microsoft-specific SMTP error codes (S3150, S775, S7771*) in Exim logs
+- Config stored in `~/.config/checkms/checkms.conf`
+- Can add/remove error codes dynamically
+- Supports time-based filtering (--minutes, --hours)
+
+### `go` - SSH Connection Shortcuts
+- Requires `LUSER` environment variable set
+- Commands: `go web <NR>`, `go mx <NR>`, `go logger`, `go support`, `go kinit`
+- Supports remote command execution with `--` separator
+- Special handling for `easyuser` connections on web servers
+
+### `quicknav` - Legacy Navigation Function
+- Simple bash function for quick SSH connections
+- Must be sourced in `.bashrc`/`.zshrc`
+- Requires manual configuration of `LUSER` variable
+
+## Environment Requirements
+
+- **LUSER**: Required environment variable for authentication (format: `username`)
+- **SSH Access**: Must have Kerberos authentication set up (`kinit`)
+- **Target Hosts**: 
+  - `web*.in.easyname.com`
+  - `mx*.in.easyname.com`
+  - `logger.in.nessus.at`
+  - `support.in.easyname.com`
+
+## Configuration Files
+
+- `checkms` uses JSON config at `~/.config/checkms/checkms.conf`
+- User profiles stored in `userprofiles/` directory
+- `.bashrc` example available with history settings and prompt configuration
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