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+# 🤖 AI Contribution Guidelines for ProxmoxVED
+
+> **This documentation is intended for all AI assistants (GitHub Copilot, Claude, ChatGPT, etc.) contributing to this project.**
+
+## 🎯 Core Principles
+
+### 1. **Maximum Use of `tools.func` Functions**
+We have an extensive library of helper functions. **NEVER** implement your own solutions when a function already exists!
+
+### 2. **No Pointless Variables**
+Only create variables when they:
+- Are used multiple times
+- Improve readability
+- Are intended for configuration
+
+### 3. **Consistent Script Structure**
+All scripts follow an identical structure. Deviations are not acceptable.
+
+### 4. **Bare-Metal Installation**
+We do **NOT use Docker** for our installation scripts. All applications are installed directly on the system.
+
+---
+
+## 📁 Script Types and Their Structure
+
+### CT Script (`ct/AppName.sh`)
+
+```bash
+#!/usr/bin/env bash
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVED/main/misc/build.func)
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: AuthorName (GitHubUsername)
+# License: MIT | https://github.com/community-scripts/ProxmoxVED/raw/main/LICENSE
+# Source: https://application-url.com
+
+APP="AppName"
+var_tags="${var_tags:-tag1;tag2;tag3}"
+var_cpu="${var_cpu:-2}"
+var_ram="${var_ram:-2048}"
+var_disk="${var_disk:-8}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-13}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+
+  if [[ ! -d /opt/appname ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+
+  if check_for_gh_release "appname" "owner/repo"; then
+    msg_info "Stopping Service"
+    systemctl stop appname
+    msg_ok "Stopped Service"
+
+    msg_info "Backing up Data"
+    cp -r /opt/appname/data /opt/appname_data_backup
+    msg_ok "Backed up Data"
+
+    CLEAN_INSTALL=1 fetch_and_deploy_gh_release "appname" "owner/repo"
+
+    # Build steps...
+
+    msg_info "Restoring Data"
+    cp -r /opt/appname_data_backup/. /opt/appname/data
+    rm -rf /opt/appname_data_backup
+    msg_ok "Restored Data"
+
+    msg_info "Starting Service"
+    systemctl start appname
+    msg_ok "Started Service"
+    msg_ok "Updated successfully!"
+  fi
+  exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed Successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW} Access it using the following URL:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}http://${IP}:PORT${CL}"
+```
+
+### Install Script (`install/AppName-install.sh`)
+
+```bash
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: AuthorName (GitHubUsername)
+# License: MIT | https://github.com/community-scripts/ProxmoxVED/raw/main/LICENSE
+# Source: https://application-url.com
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+msg_info "Installing Dependencies"
+$STD apt-get install -y \
+  dependency1 \
+  dependency2
+msg_ok "Installed Dependencies"
+
+# Runtime Setup (ALWAYS use our functions!)
+NODE_VERSION="22" setup_nodejs
+# or
+PG_VERSION="16" setup_postgresql
+# or
+setup_uv
+# etc.
+
+fetch_and_deploy_gh_release "appname" "owner/repo"
+
+msg_info "Setting up Application"
+cd /opt/appname
+# Build/Setup Schritte...
+msg_ok "Set up Application"
+
+msg_info "Creating Service"
+cat <<EOF >/etc/systemd/system/appname.service
+[Unit]
+Description=AppName Service
+After=network.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/opt/appname
+ExecStart=/path/to/executable
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+systemctl enable -q --now appname
+msg_ok "Created Service"
+
+motd_ssh
+customize
+cleanup_lxc
+```
+
+---
+
+## 🔧 Available Helper Functions
+
+### Release Management
+
+| Function | Description | Example |
+|----------|-------------|----------|
+| `fetch_and_deploy_gh_release` | Fetches and installs GitHub Release | `fetch_and_deploy_gh_release "app" "owner/repo"` |
+| `check_for_gh_release` | Checks for new version | `if check_for_gh_release "app" "owner/repo"; then` |
+
+**Modes for `fetch_and_deploy_gh_release`:**
+```bash
+# Tarball/Source (Standard)
+fetch_and_deploy_gh_release "appname" "owner/repo"
+
+# Binary (.deb)
+fetch_and_deploy_gh_release "appname" "owner/repo" "binary"
+
+# Prebuilt Archive
+fetch_and_deploy_gh_release "appname" "owner/repo" "prebuild" "latest" "/opt/appname" "filename.tar.gz"
+
+# Single Binary
+fetch_and_deploy_gh_release "appname" "owner/repo" "singlefile" "latest" "/opt/appname" "binary-linux-amd64"
+```
+
+**Clean Install Flag:**
+```bash
+CLEAN_INSTALL=1 fetch_and_deploy_gh_release "appname" "owner/repo"
+```
+
+### Runtime/Language Setup
+
+| Function | Variable(s) | Example |
+|----------|-------------|----------|
+| `setup_nodejs` | `NODE_VERSION`, `NODE_MODULE` | `NODE_VERSION="22" setup_nodejs` |
+| `setup_uv` | `UV_PYTHON` | `UV_PYTHON="3.12" setup_uv` |
+| `setup_go` | `GO_VERSION` | `GO_VERSION="1.22" setup_go` |
+| `setup_rust` | `RUST_VERSION`, `RUST_CRATES` | `RUST_CRATES="monolith" setup_rust` |
+| `setup_ruby` | `RUBY_VERSION` | `RUBY_VERSION="3.3" setup_ruby` |
+| `setup_java` | `JAVA_VERSION` | `JAVA_VERSION="21" setup_java` |
+| `setup_php` | `PHP_VERSION`, `PHP_MODULES` | `PHP_VERSION="8.3" PHP_MODULES="redis,gd" setup_php` |
+
+### Database Setup
+
+| Function | Variable(s) | Example |
+|----------|-------------|----------|
+| `setup_postgresql` | `PG_VERSION`, `PG_MODULES` | `PG_VERSION="16" setup_postgresql` |
+| `setup_postgresql_db` | `PG_DB_NAME`, `PG_DB_USER` | `PG_DB_NAME="mydb" PG_DB_USER="myuser" setup_postgresql_db` |
+| `setup_mariadb_db` | `MARIADB_DB_NAME`, `MARIADB_DB_USER` | `MARIADB_DB_NAME="mydb" setup_mariadb_db` |
+| `setup_mysql` | `MYSQL_VERSION` | `setup_mysql` |
+| `setup_mongodb` | `MONGO_VERSION` | `setup_mongodb` |
+| `setup_clickhouse` | - | `setup_clickhouse` |
+
+### Tools & Utilities
+
+| Function | Description |
+|----------|-------------|
+| `setup_adminer` | Installs Adminer for DB management |
+| `setup_composer` | Install PHP Composer |
+| `setup_ffmpeg` | Install FFmpeg |
+| `setup_imagemagick` | Install ImageMagick |
+| `setup_gs` | Install Ghostscript |
+| `setup_hwaccel` | Configure hardware acceleration |
+
+### Helper Utilities
+
+| Function | Description | Example |
+|----------|-------------|----------|
+| `import_local_ip` | Sets `$LOCAL_IP` variable | `import_local_ip` |
+| `ensure_dependencies` | Checks/installs dependencies | `ensure_dependencies curl jq` |
+| `install_packages_with_retry` | APT install with retry | `install_packages_with_retry nginx redis` |
+
+---
+
+## ❌ Anti-Patterns (NEVER use!)
+
+### 1. Pointless Variables
+```bash
+# ❌ WRONG - unnecessary variables
+APP_NAME="myapp"
+APP_DIR="/opt/${APP_NAME}"
+APP_USER="root"
+APP_PORT="3000"
+cd $APP_DIR
+
+# ✅ CORRECT - use directly
+cd /opt/myapp
+```
+
+### 2. Custom Download Logic
+```bash
+# ❌ WRONG - custom wget/curl logic
+RELEASE=$(curl -s https://api.github.com/repos/owner/repo/releases/latest | jq -r '.tag_name')
+wget https://github.com/owner/repo/archive/${RELEASE}.tar.gz
+tar -xzf ${RELEASE}.tar.gz
+mv repo-${RELEASE} /opt/myapp
+
+# ✅ CORRECT - use our function
+fetch_and_deploy_gh_release "myapp" "owner/repo"
+```
+
+### 3. Custom Version-Check Logic
+```bash
+# ❌ WRONG - custom version check
+CURRENT=$(cat /opt/myapp/version.txt)
+LATEST=$(curl -s https://api.github.com/repos/owner/repo/releases/latest | jq -r '.tag_name')
+if [[ "$CURRENT" != "$LATEST" ]]; then
+  # update...
+fi
+
+# ✅ CORRECT - use our function
+if check_for_gh_release "myapp" "owner/repo"; then
+  # update...
+fi
+```
+
+### 4. Docker-based Installation
+```bash
+# ❌ WRONG - using Docker
+docker pull myapp/myapp:latest
+docker run -d --name myapp myapp/myapp:latest
+
+# ✅ CORRECT - Bare-Metal Installation
+fetch_and_deploy_gh_release "myapp" "owner/repo"
+npm install && npm run build
+```
+
+### 5. Custom Runtime Installation
+```bash
+# ❌ WRONG - custom Node.js installation
+curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
+apt install -y nodejs
+
+# ✅ CORRECT - use our function
+NODE_VERSION="22" setup_nodejs
+```
+
+### 6. Redundant echo Statements
+```bash
+# ❌ WRONG - custom logging messages
+echo "Installing dependencies..."
+apt install -y curl
+echo "Done!"
+
+# ✅ CORRECT - use msg_info/msg_ok
+msg_info "Installing Dependencies"
+$STD apt install -y curl
+msg_ok "Installed Dependencies"
+```
+
+### 7. Missing $STD Usage
+```bash
+# ❌ WRONG - apt without $STD
+apt install -y nginx
+
+# ✅ CORRECT - with $STD for silent output
+$STD apt install -y nginx
+```
+
+---
+
+## 📝 Important Rules
+
+### Variable Declarations (CT Script)
+```bash
+# Standard declarations (ALWAYS present)
+APP="AppName"
+var_tags="${var_tags:-tag1;tag2}"
+var_cpu="${var_cpu:-2}"
+var_ram="${var_ram:-2048}"
+var_disk="${var_disk:-8}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-13}"
+var_unprivileged="${var_unprivileged:-1}"
+```
+
+### Update-Script Pattern
+```bash
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+
+  # 1. Check if installation exists
+  if [[ ! -d /opt/appname ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+
+  # 2. Check for update
+  if check_for_gh_release "appname" "owner/repo"; then
+    # 3. Stop service
+    msg_info "Stopping Service"
+    systemctl stop appname
+    msg_ok "Stopped Service"
+
+    # 4. Backup data (if present)
+    msg_info "Backing up Data"
+    cp -r /opt/appname/data /opt/appname_data_backup
+    msg_ok "Backed up Data"
+
+    # 5. Perform clean install
+    CLEAN_INSTALL=1 fetch_and_deploy_gh_release "appname" "owner/repo"
+
+    # 6. Rebuild (if needed)
+    cd /opt/appname
+    $STD npm install
+    $STD npm run build
+
+    # 7. Restore data
+    msg_info "Restoring Data"
+    cp -r /opt/appname_data_backup/. /opt/appname/data
+    rm -rf /opt/appname_data_backup
+    msg_ok "Restored Data"
+
+    # 8. Start service
+    msg_info "Starting Service"
+    systemctl start appname
+    msg_ok "Started Service"
+    msg_ok "Updated successfully!"
+  fi
+  exit  # IMPORTANT: Always end with exit!
+}
+```
+
+### Systemd Service Pattern
+```bash
+msg_info "Creating Service"
+cat <<EOF >/etc/systemd/system/appname.service
+[Unit]
+Description=AppName Service
+After=network.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/opt/appname
+Environment=NODE_ENV=production
+ExecStart=/usr/bin/node /opt/appname/server.js
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+systemctl enable -q --now appname
+msg_ok "Created Service"
+```
+
+### Installation Script Footer
+```bash
+# ALWAYS at the end of the install script:
+motd_ssh
+customize
+cleanup_lxc
+```
+
+---
+
+## 🔍 Checklist Before PR Creation
+
+- [ ] No Docker installation used
+- [ ] `fetch_and_deploy_gh_release` used for GitHub releases
+- [ ] `check_for_gh_release` used for update checks
+- [ ] `setup_*` functions used for runtimes (nodejs, postgresql, etc.)
+- [ ] No redundant variables
+- [ ] `$STD` before all apt/npm/build commands
+- [ ] `msg_info`/`msg_ok`/`msg_error` for logging
+- [ ] Correct script structure followed
+- [ ] Update function present and functional
+- [ ] Data backup implemented in update function
+- [ ] `motd_ssh`, `customize`, `cleanup_lxc` at the end
+- [ ] No custom download/version-check logic
+
+---
+
+## 📖 Reference: Good Example (Termix)
+
+### CT Script: [ct/termix.sh](../ct/termix.sh)
+- Uses `check_for_gh_release` for version checking
+- Uses `CLEAN_INSTALL=1 fetch_and_deploy_gh_release` for clean updates
+- Backup/restore of `/opt/termix/data`
+- Correct structure with all required variables
+
+### Install Script: [install/termix-install.sh](../install/termix-install.sh)
+- `NODE_VERSION="22" setup_nodejs` instead of manual installation
+- `fetch_and_deploy_gh_release "termix" "Termix-SSH/Termix"` instead of wget/curl
+- Clean service configuration
+- Correct footer with `motd_ssh`, `customize`, `cleanup_lxc`
+
+---
+
+## 💡 Tips for AI Assistants
+
+1. **Search `tools.func` first** before implementing custom solutions
+2. **Use existing scripts as reference** (e.g., `linkwarden-install.sh`, `homarr-install.sh`)
+3. **Ask when uncertain** instead of introducing wrong patterns
+4. **Consistency > Creativity** - follow established patterns
+5. **Test local variables** - use `${VAR:-default}` pattern for optional values
+
+---
+
+## 📚 Further Documentation
+
+- [CONTRIBUTING.md](contribution/CONTRIBUTING.md) - General contribution guidelines
+- [GUIDE.md](contribution/GUIDE.md) - Detailed developer documentation
+- [TECHNICAL_REFERENCE.md](TECHNICAL_REFERENCE.md) - Technical details
+- [EXIT_CODES.md](EXIT_CODES.md) - Exit code reference