diff --git a/.agents/AGENTS.md b/.agents/AGENTS.md
new file mode 100644
index 0000000..beac5e9
--- /dev/null
+++ b/.agents/AGENTS.md
@@ -0,0 +1,169 @@
+AGENTS
+
+I created this `AGENTS.md` to help agentic coding assistants work in this repository. It contains
+1) Build / lint / test commands (including how to run a single test) and
+2) Code style guidelines and conventions to follow when editing code here.
+
+Repository state
+- This repository contains shell scripts for Linux Mint XFCE post-installation setup.
+- Main scripts are located in `post_installation_script/` directory.
+- Testing infrastructure is in `post_installation_script_test/` (Docker/Podman test containers).
+- No build system, package.json, Makefile, or language-specific project files were detected.
+- There are no Cursor rules or Copilot instruction files in the repo (checked paths below).
+  - `.cursor/rules/` : not found
+  - `.cursorrules` : not found
+  - `.github/copilot-instructions.md` : not found
+
+If you add new code (Go, Python, Node, Rust, Java, etc.), follow the per-ecosystem quick commands below.
+
+1) Build / Lint / Test commands
+
+- General notes
+  - Run commands from the repository root unless a submodule or service has its own README.
+  - Prefer local, repo-scoped toolchains (venv, node_modules/.bin, go modules, cargo) to avoid global state.
+
+- Shell scripts
+  - Quick check: `shellcheck scripts/*.sh` (install `shellcheck` first).
+  - Run an individual script: `bash path/to/script.sh` or `./script.sh` (ensure executable bit set).
+  - Syntax check: `bash -n path/to/script.sh`
+  - Trace execution: `bash -x path/to/script.sh` (shows each command as it runs)
+
+- Testing shell scripts
+  - See `post_installation_script_test/README.md` for detailed container-based testing instructions.
+  - Quick start:
+    - Build image: `./post_installation_script_test/01_create_image.sh`
+    - Start container: `./post_installation_script_test/02_start_container_with_image.sh`
+
+- Python (if added)
+  - Install: `python -m venv .venv && source .venv/bin/activate && pip install -r requirements.txt`
+  - Lint: `ruff .` or `flake8 .`
+  - Format: `black .`
+  - Test all: `pytest -q`
+  - Run a single test: `pytest path/to/test_file.py::TestClass::test_method -q`
+
+- Node / JavaScript / TypeScript (if added)
+  - Install: `npm ci` or `pnpm install` / `yarn install`
+  - Lint: `npm run lint` (or `npx eslint .`)
+  - Format: `npx prettier --write .`
+  - Test all: `npm test` (or `npx vitest` / `npx jest`)
+  - Run a single test:
+    - Jest: `npx jest path/to/file.test.js -t "test name regex"`
+    - Vitest: `npx vitest run path/to/file.spec.ts -t "test name"`
+
+- Go (if added)
+  - Build: `go build ./...`
+  - Lint: `golangci-lint run` (if configured)
+  - Test all: `go test ./...`
+  - Run a single test: `go test ./pkg/name -run TestFunctionName`
+
+- Rust (if added)
+  - Build: `cargo build`
+  - Lint: `cargo clippy`
+  - Test all: `cargo test`
+  - Run a single test: `cargo test test_name -- --exact`
+
+- Java / Maven (if added)
+  - Build: `mvn -DskipTests package`
+  - Lint/format: use `spotless`/`checkstyle` if configured
+  - Test all: `mvn test`
+  - Run a single test: `mvn -Dtest=ClassName#methodName test`
+
+- .NET (if added)
+  - Build: `dotnet build`
+  - Test all: `dotnet test`
+  - Run a single test: `dotnet test --filter FullyQualifiedName~Namespace.ClassName.MethodName`
+
+- CI / Automation
+  - If you add GitHub Actions, keep workflows idempotent and cache dependencies carefully.
+  - Avoid secrets in workflows; read sensitive values from repository/organization secrets.
+
+2) Code style guidelines
+
+The guidance below is intentionally general and focuses on consistency, readability and safety so
+agentic tools can make changes predictably across multiple languages.
+
+- Formatting
+  - Use an automated formatter for the language (Black for Python, Prettier for JS/TS, gofmt/gofmt -s for Go,
+    rustfmt for Rust). Commit formatted code only.
+  - Use an editorconfig file for basic whitespace/indentation rules when possible.
+
+- Imports / dependencies
+  - Keep imports explicit and minimal: import only what you use.
+  - Group imports in a logical order (language default + third-party + local project). Leave a blank line between groups.
+  - Don’t commit unused dependencies; remove them from lock files / manifests and run the linter.
+
+- Types / typing
+  - Prefer explicit types where the language supports them (TypeScript types, Python type hints, Go static types).
+  - Add types for public interfaces and complex logic; internal simple helper functions may rely on inference.
+
+- Naming conventions
+  - Use clear, descriptive names. Prefer `calculate_total`, `prepare_connection`, `user_id` style for snake_case languages.
+  - For camelCase languages (JS/TS): `calculateTotal`, `prepareConnection`.
+  - Types and classes: use PascalCase/UpperCamelCase: `UserService`, `HttpClient`.
+  - Constants: use UPPER_SNAKE_CASE or language-specific constant conventions.
+
+- Functions and modules
+  - Keep functions small (ideally < 40 lines) and single-responsibility.
+  - Prefer pure functions where possible; keep side effects explicit and isolated.
+  - Organize modules by feature/domain, not solely by type (avoid monolithic god-modules).
+
+- Error handling
+  - Fail fast and return/raise errors with context (message + cause) rather than swallowing them.
+  - Avoid logging raw errors in library code; return errors to callers and let the application layer decide logging.
+  - Use typed error types when the language supports it (Go error types, custom exceptions in Python/JS).
+  - Clean up resources with `finally`/`defer` equivalents to avoid leaks.
+
+- Tests
+  - Prefer small, deterministic unit tests. Mock external IO and network where reasonable.
+  - Use explicit fixtures and avoid implicit global state between tests.
+  - Name tests with the behavior they assert: `test_calculate_total_with_discounts` or `shouldReturn400WhenMissingField`.
+
+- Logging and observability
+  - Use structured logging where available (JSON structured logs for services).
+  - Avoid printing raw stack traces to stdout in production code; include them at debug level.
+
+- Security and secrets
+  - Never commit secrets, API keys, or credentials. Use environment variables and vaults.
+  - Validate and sanitize external input at the boundaries of the system.
+
+- Performance
+  - Measure before optimizing. Prefer clarity over micro-optimizations unless a hotspot is identified.
+
+3) Code review / commit guidance for agents
+
+- Make small, focused commits and include a one-line summary plus a short description of the why.
+- When changing behavior, add or update tests that verify the new/changed behavior.
+- If you reformat files automatically, include the formatter command in the commit message to make CI reproduction easy.
+
+4) Repo housekeeping checks (recommended for agents)
+
+- When adding a new language or framework, add an entry to this file with the exact commands required to build/test.
+- Add CI workflows to run lint + tests on PRs and enable branch protection rules if this becomes a shared repo.
+- **Session storage**: Store session logs and working notes in `.agents/sessions/` folder for future reference. Use descriptive filenames (e.g., `session-<date>-<topic>.md`).
+
+5) Cursor / Copilot rules
+
+- Cursor rules: none present at `.cursor/rules/` or `.cursorrules` in this repository.
+- GitHub Copilot instructions: none present at `.github/copilot-instructions.md`.
+
+If you add any of these files, update this document and include the exact file path and relevant sections for agents to follow.
+
+Quick checklist for an agent making changes
+- Run local linter/formatter configured for the language before opening a PR.
+- Run the test suite and the single-test command for any tests you added/changed.
+- Do not add secrets to the tree; use placeholders and document required environment variables.
+
+Next steps (recommended)
+1) Add a minimal `Makefile` or `package.json` scripts for common tasks so agents can run `make test` / `npm test`.
+2) If the project will contain multiple services, add per-service README files and CI workflows.
+3) Add EditorConfig + language-specific formatter configs (pyproject.toml, .prettierrc, rustfmt.toml) to lock formatting rules.
+
+Files referenced
+- Root `README.md`
+- `post_installation_script/README.md` - main script usage
+- `post_installation_script_test/README.md` - testing instructions
+- `.cursor/rules/` (not present)
+- `.cursorrules` (not present)
+- `.github/copilot-instructions.md` (not present)
+
+If anything in this file needs to be stricter or you want another style (for example a fully opinionated TS style), say which language or style and I will update `AGENTS.md` accordingly.
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8f5d17c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,24 @@
+# OS
+.DS_Store
+Thumbs.db
+*~
+
+# IDE
+.idea/
+*.swp
+*.swo
+*~
+.vscode/
+
+# Test containers
+*.tar.gz
+fonts-main/
+*.log
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+
+# agent specific sessions
+.agents/sessions/*
diff --git a/post_installation_script/20251212_Nachinstallationsarbeiten_LC_Esslingen_XFCE_v8.sh b/post_installation_script/20251212_Nachinstallationsarbeiten_LC_Esslingen_XFCE_v8.sh
new file mode 100644
index 0000000..12ac3af
--- /dev/null
+++ b/post_installation_script/20251212_Nachinstallationsarbeiten_LC_Esslingen_XFCE_v8.sh
@@ -0,0 +1,237 @@
+#!/bin/bash
+
+
+# "Anderungs Historie
+# Datum		Version	Name	Änderung
+# 2025-11-11	v6	MartinP	mehr Erläuterungen reingeschrieben
+# 2025-11-17	v7	Mark	Simualtion Modus und 32Bit abfrage entfernt
+# 2025-12-12    v8  MartinP Erläuterungen ergänzt und Typos entfernt
+#
+
+bIsVlcInstalled=false
+
+# Prompt helper: ask a question and return 0 (yes) for j/J/ja/y/Y, non-zero otherwise
+question_answered_with_yes() {
+  local prompt="$1"
+  local ans
+  # Use %b to interpret backslash escape sequences (\n, \t, etc.)
+  printf '%b\n  Geben Sie j oder n ein und die Eingabetaste,\n  Abbruch mit jeder anderen Taste ... [j/N]: ' "$prompt"
+  read -r ans
+  case "$ans" in
+    j|J|ja|y|Y) return 0 ;;
+    n|N|"") return 1 ;;
+    *) echo "Abbruch."; exit 1 ;;
+  esac
+}
+
+
+echo "
+###################################
+#### Nachinstallationsarbeiten ####
+###################################
+
+#### Was tut dieses Skript? ####
+
+# Vorausgesetzt wird eine Installation von Linux Mint XFCE.
+# Das Skript bietet -teilweise interaktiv- die Installation von zusätzlichen Programmen an, die  Linux Mint XFCE nicht standardmässig mitbringt.
+#
+# Zu Beginn werden die folgenden zusätzlichen Programme in einem Schritt installiert:
+#
+# xfce4-goodies (zusätzliche Elemente für die Taskleiste)
+# xfce4-panel-profiles (Tool für die Taskleistenbearbeitung)
+# clementine  (Audioplayer und Musikbibliothekverwaltung)
+# vlc (weltbester Mediaplayer ;-))
+# htop (Systemmonitortool)
+# hardinfo (Übersicht der Systemeigenschaften)
+# font-manager (Schriftarten verwalten)
+# asunder (Audio-CDs in z.B. mp3-Dateien verwandeln (rippen))
+# gtkhash (Prüfsummen von Dateien erstellen und überprüfen)
+
+
+# Danach geht es interaktiv weiter.
+"
+#
+#
+#
+sudo apt-get update
+
+sSuffixDate=$(date '+%Y-%m-%d_%H:%M:%S')
+
+
+echo
+if question_answered_with_yes "#### Installiere Zusatzprogramme für 64 bit Mint XFCE? ####"; then
+    echo "#### 64 bit Mint XFCE ####"
+    sudo apt -y install xfce4-goodies clementine vlc htop hardinfo font-manager asunder gtkhash xfce4-panel-profiles
+    bIsVlcInstalled=true
+fi
+
+echo ""
+echo ""
+echo
+echo
+echo "#### nur auf Wunsch / bei Bedarf ####"
+echo
+### Sensoren ###
+if question_answered_with_yes " ### Installiere Sensoren? ###"; then
+    echo "### Sensoren ###"
+    sudo apt install lm-sensors psensor
+    sudo sensors-detect
+    sudo service kmod start
+    echo "## im Anschluss \"psensor\" konfigurieren im XFCE-Applet in der Taskleiste"
+fi
+
+
+echo
+echo
+if [ "$bIsVlcInstalled" = true ]; then
+    echo "### Kauf-DVDs abspielen ###"
+    if question_answered_with_yes "  ### Installiere Paket um Film DVDs abspielen zu können? ###"; then
+        echo "### Kauf-DVDs abspielen ###"
+        sudo apt install libdvd-pkg
+        sudo dpkg-reconfigure libdvd-pkg
+    fi
+else
+    echo "Player Fehlt
+    ## VLC muss installiert sein um Kauf-DVDs abspielen zu können"
+fi
+
+
+echo
+echo
+echo "### Schriften, falls Microsoft-Office-Dokumente weiterverwendet werden sollen oder Dokumentenaustausch mit Microsoft-Nutzern gewünscht ist ###
+## frei verfügbare, alte Microsoft-Standardschriften installieren:"
+
+if question_answered_with_yes " ### Installiere M$ Schriften? ###"; then
+    echo "### M$ Schriften ###"
+    sudo apt install ttf-mscorefonts-installer
+fi
+
+echo
+echo
+echo " ## freie Google-Schriften als Ersatz für aktuelle MS-Standardschriften installieren:"
+if question_answered_with_yes " ### Installiere Google Schriften? ###"; then
+    echo
+    echo "### Google Schriften ###"
+
+	_gf="google-fonts"
+	fGoogleSchriften=./$_gf".tar.gz"
+	if [ ! -f "$fGoogleSchriften" ]; then
+		echo ""
+		echo "$fGoogleSchriften nicht gefunden."
+		echo " soll das  Archiv "google-fonts.tar.gz" von Github heruntergeladen werden? Es ist ca. 1,4GB gross! "
+        if question_answered_with_yes " ### Download Google Schriften ###"; then
+            _wgeturl="https://github.com/google/fonts/archive/main.tar.gz"
+            echo "Connecting to Github server to download fonts..."
+            wget "$_wgeturl" -O "$_gf.tar.gz"
+        fi
+	fi
+        if [ -f "$fGoogleSchriften" ]; then
+            echo
+            echo "Extracting the downloaded archive..."
+            tar -zxvf "$_gf.tar.gz"
+            echo "Creating the /usr/share/fonts/truetype/$_gf folder"
+            sudo mkdir -p /usr/share/fonts/truetype/$_gf
+            echo "Installing all .ttf fonts in /usr/share/fonts/truetype/$_gf"
+            find "$PWD/fonts-main/" -name "*.ttf" -exec sudo install -m644 {} /usr/share/fonts/truetype/google-fonts/ \; || echo "An error occured, please run this script again."
+            echo "Updating the font cache"
+            fc-cache -f
+            echo "Done. Now you can delete the tarball file $_gf.tar.gz if you wish."
+
+		echo "Temporärer Fontordner wird gelöscht"
+		rm -r fonts-main
+		echo "Google-Schriften sind installiert. Die Anpassung der Standardschriften und/oder das Erstellen der Ersetzungstabelle in Libre Office muss manuell erfolgen, falls gewünscht."
+	else
+		echo "Schriften Fehlen immer noch. Manuell herunterladen und installieren"
+	fi
+
+fi
+#
+
+
+
+
+echo
+echo
+echo "#### Chromium Browser installieren:"
+if question_answered_with_yes " ### Installiere Chromium?  ###"; then
+    echo "### Chromium  ###"
+    sudo apt install chromium-browser
+    sudo apt install chromium
+fi
+
+echo
+echo
+echo "#### Vivaldi Browser installieren:"
+if question_answered_with_yes " ### Installiere Vivaldi? ###"; then
+    echo "### ###"
+    echo "## nötige Zusatzpakete installieren"
+    sudo apt install dirmngr ca-certificates software-properties-common apt-transport-https curl -y
+	#
+	echo "## ## key importieren"
+	curl -fsSL https://repo.vivaldi.com/archive/linux_signing_key.pub | gpg --dearmor | sudo tee /usr/share/keyrings/vivaldi.gpg > /dev/null
+	#
+	echo "## ## Repository hinzufügen"
+	echo deb [arch=amd64,armhf signed-by=/usr/share/keyrings/vivaldi.gpg] https://repo.vivaldi.com/stable/deb/ stable main | sudo tee /etc/apt/sources.list.d/vivaldi.list
+	#
+	sudo apt update && sudo apt install vivaldi-stable
+	#
+	echo "## ## Gnome-Schlüsselbund-Fehlermeldung bei jedem Start von Chrome/Chromium beheben: Starter bzw. .desktop-Datei mit folgendem Parameter ergänzen: "
+	echo "## ## --password-store=basic"
+	#
+fi
+
+
+
+echo
+echo
+echo "####Signal für Desktop (die Nutzung setzt eine Signal-Installation auf einem Android- Oder Apple-Gerät voraus!)#### "
+if question_answered_with_yes " ###  Installiere Signal?  ###"; then
+    echo "### ###"
+    echo "## zusätzliches Repository nötig!
+    ## NOTE: These instructions only work for 64-bit Debian-based
+    ## Linux distributions such as Ubuntu, Mint etc.
+    ## key importieren
+    "
+	wget -O- https://updates.signal.org/desktop/apt/keys.asc | gpg --dearmor > signal-desktop-keyring.gpg
+	cat signal-desktop-keyring.gpg | sudo tee /usr/share/keyrings/signal-desktop-keyring.gpg > /dev/null
+	#
+	echo "## Repository hinzufügen:"
+	echo 'deb [arch=amd64 signed-by=/usr/share/keyrings/signal-desktop-keyring.gpg] https://updates.signal.org/desktop/apt xenial main' | sudo tee /etc/apt/sources.list.d/signal-xenial.list
+	sudo apt update && sudo apt install signal-desktop
+	#
+
+fi
+
+
+
+echo
+echo
+echo "### Anpassung der Panel-Konfiguration / Taskleiste #### "
+echo "### SystemMonitor, ArbeitsflächenAnzeige  #### "
+echo
+echo "Achtung! Es kann vorkommen, dass die Taskleiste nach diesem Schritt verschwunden ist."
+echo "Ein Abmelden und Wiederanmelden des Benutzers oder ein Reboot behebt das Problem."
+echo
+if question_answered_with_yes " ###  Änderungen am Panel durchführen?  ###"; then
+    echo "### ###"
+    echo "## Austausch der Panel-Konfigurationsdatei:"
+    xfce4-panel-profiles load current-config.tar.bz2
+fi
+echo
+echo "###############################"
+echo "######### Skript ENDE #########"
+echo "###############################"
+echo
+echo
+echo
+echo "Verbleibende manuelle Schritte:"
+echo
+echo "### Taskleiste ###: XFCE-Applets für 2x Netzwerkmonitor (LAN + WLAN) konfigurieren"
+echo
+echo "Wenn ### Sensoren ### installiert wurden: psensor konfigurieren im XFCE-Applet in der Taskleiste, falls gewünscht."
+echo
+echo "Wenn ### Google-Schriften ### installiert wurden: Anpassung der Standardschriften und/oder das Erstellen der Ersetzungstabelle in Libre Office, falls gewünscht."
+echo
+echo
+read -p ' ###  Um dieses Fenster zu schliessen, Enter drücken ### ' 
+exit 0
diff --git a/231013_nachinstallationsarbeiten_Konsole_v2.txt.sh b/post_installation_script/231013_nachinstallationsarbeiten_Konsole_v2.txt.sh
similarity index 100%
rename from 231013_nachinstallationsarbeiten_Konsole_v2.txt.sh
rename to post_installation_script/231013_nachinstallationsarbeiten_Konsole_v2.txt.sh
diff --git a/post_installation_script/README.md b/post_installation_script/README.md
new file mode 100644
index 0000000..c45a9c5
--- /dev/null
+++ b/post_installation_script/README.md
@@ -0,0 +1,18 @@
+# Post-Installation Script
+
+This directory contains all files belonging to the Linux Mint XFCE post-installation script.
+
+## Usage
+
+Run the main script:
+
+```bash
+cd post_installation_script
+bash 20251212_Nachinstallationsarbeiten_LC_Esslingen_XFCE_v8.sh
+```
+
+The script is interactive and will prompt for confirmation before each installation step.
+
+## Testing
+
+See `../post_installation_script_test/README.md` for container-based testing instructions.
diff --git a/xfce4-panel.xml b/post_installation_script/xfce4-panel.xml
similarity index 100%
rename from xfce4-panel.xml
rename to post_installation_script/xfce4-panel.xml
diff --git a/post_installation_script_test/01_create_image.sh b/post_installation_script_test/01_create_image.sh
new file mode 100755
index 0000000..116b0d7
--- /dev/null
+++ b/post_installation_script_test/01_create_image.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+# Create test image from Dockerfile
+docker build -t mint-script-test -f Dockerfile .
diff --git a/post_installation_script_test/02_start_container_with_image.sh b/post_installation_script_test/02_start_container_with_image.sh
new file mode 100755
index 0000000..861a518
--- /dev/null
+++ b/post_installation_script_test/02_start_container_with_image.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Start container with the test image (interactive shell)
+docker run -it --rm \
+  --tmpfs /tmp:rw \
+  -v "$(pwd)/../post_installation_script/":/workspace/:ro \
+  mint-script-test
diff --git a/post_installation_script_test/Dockerfile b/post_installation_script_test/Dockerfile
new file mode 100644
index 0000000..d4908da
--- /dev/null
+++ b/post_installation_script_test/Dockerfile
@@ -0,0 +1,12 @@
+FROM ubuntu:22.04
+
+# Install required utilities including sudo
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    bash wget tar curl gnupg ca-certificates apt-utils apt coreutils file procps sudo && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# Configure passwordless sudo for all users (needed for script)
+RUN echo 'ALL ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers
+
+WORKDIR /workspace
+ENTRYPOINT ["/bin/bash"]
diff --git a/post_installation_script_test/README.md b/post_installation_script_test/README.md
new file mode 100644
index 0000000..23d005b
--- /dev/null
+++ b/post_installation_script_test/README.md
@@ -0,0 +1,63 @@
+# Post-Installation Script Testing
+
+This directory contains everything needed to test the post-installation script in a safe, isolated container environment.
+
+## Contents
+
+- `Dockerfile` - Container image definition for testing
+- `01_create_image.sh` - script for creating container image locally
+- `02_start_container_with_image.sh` - script for starting container from created image
+
+## Purpose
+
+Provides a reproducible testing environment that allows:
+
+- Running the post-installation script without affecting the host system
+- Real `apt` installations (isolated in container)
+- Testing script logic, prompts, and error handling
+- Validating syntax and tracing execution
+
+## Features
+
+The Dockerfile includes:
+
+- Ubuntu 22.04 base image
+- Passwordless sudo for real apt installations
+- Useful utilities: `bash`, `wget`, `tar`, `curl`, `gnupg`, `ca-certificates`, `file`, `procps`, `sudo`
+
+## Usage
+
+### Build the test image
+Run the prepared shell script to build the image
+
+```bash
+cd post_installation_script_test
+sh 01_create_image.sh
+```
+
+### Start a container for testing
+Run the prepared shell script start a new container for testing based in the 
+image and remove container after it is stopped. After container is started an interactive session is started into the container.
+
+```bash
+cd post_installation_script_test
+sh 02_start_container_with_image.sh
+```
+
+
+### Test the script file in the running container
+After container is started an interactive session was started in the container and the script can be started for testing. 
+If script is changed on the host it just needs to be restarted in the container to reflect the changes. 
+This works because to folder is mounted into the container.
+
+```bash
+ls -al
+sh <scriptName>.sh
+```
+
+## Security Notes
+
+- The script is mounted read-only (`:ro` flag) to prevent container from modifying host files
+- All apt installations are real but isolated in the container
+- Use `--tmpfs /tmp:rw` for any temporary writes inside the container
+- Container is automatically removed after exit (`--rm` flag)