diff --git a/oh-my-zsh/custom/example.zsh b/oh-my-zsh/custom/example.zsh
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+++ b/oh-my-zsh/custom/example.zsh
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+# Put files in this folder to add your own custom functionality.
+# See: https://github.com/ohmyzsh/ohmyzsh/wiki/Customization
+#
+# Files in the custom/ directory will be:
+# - loaded automatically by the init script, in alphabetical order
+# - loaded last, after all built-ins in the lib/ directory, to override them
+# - ignored by git by default
+#
+# Example: add custom/shortcuts.zsh for shortcuts to your local projects
+#
+# brainstormr=~/Projects/development/planetargon/brainstormr
+# cd $brainstormr
diff --git a/oh-my-zsh/custom/platformio.zsh b/oh-my-zsh/custom/platformio.zsh
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+# PlatformIO Helper-Funktionen
+# Findet das PlatformIO-Projektverzeichnis (wo platformio.ini liegt)
+_pio_find_root() {
+    local dir="$PWD"
+    while [[ "$dir" != "/" ]]; do
+        if [[ -f "$dir/platformio.ini" ]]; then
+            echo "$dir"
+            return 0
+        fi
+        dir="$(dirname "$dir")"
+    done
+    echo "Fehler: Kein PlatformIO-Projekt gefunden (platformio.ini fehlt)" >&2
+    return 1
+}
+
+# Build
+alias piob='_pio_build'
+_pio_build() {
+    local root=$(_pio_find_root) || return 1
+    echo "Building in: $root"
+    (cd "$root" && pio run)
+}
+
+# Upload
+alias piou='_pio_upload'
+_pio_upload() {
+    local root=$(_pio_find_root) || return 1
+    echo "Uploading from: $root"
+    (cd "$root" && pio run --target upload)
+}
+
+# Monitor
+alias piom='_pio_monitor'
+_pio_monitor() {
+    local root=$(_pio_find_root) || return 1
+    echo "Starting monitor from: $root"
+    (cd "$root" && pio device monitor)
+}
+
+# Upload + Monitor (praktische Kombi)
+alias pioum='_pio_upload_monitor'
+_pio_upload_monitor() {
+    local root=$(_pio_find_root) || return 1
+    echo "Upload & Monitor from: $root"
+    (cd "$root" && pio run --target upload && pio device monitor)
+}
+
+# Clean
+alias pioc='_pio_clean'
+_pio_clean() {
+    local root=$(_pio_find_root) || return 1
+    echo "Cleaning: $root"
+    (cd "$root" && pio run --target clean)
+}
diff --git a/oh-my-zsh/custom/plugins/example/example.plugin.zsh b/oh-my-zsh/custom/plugins/example/example.plugin.zsh
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+++ b/oh-my-zsh/custom/plugins/example/example.plugin.zsh
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+# Add your own custom plugins in the custom/plugins directory. Plugins placed
+# here will override ones with the same name in the main plugins directory.
+# See: https://github.com/ohmyzsh/ohmyzsh/wiki/Customization#overriding-and-adding-plugins
diff --git a/oh-my-zsh/custom/plugins/zsh-syntax-highlighting b/oh-my-zsh/custom/plugins/zsh-syntax-highlighting
new file mode 160000
index 0000000..5eb677b
--- /dev/null
+++ b/oh-my-zsh/custom/plugins/zsh-syntax-highlighting
@@ -0,0 +1 @@
+Subproject commit 5eb677bb0fa9a3e60f0eff031dc13926e093df92
diff --git a/oh-my-zsh/custom/themes/example.zsh-theme b/oh-my-zsh/custom/themes/example.zsh-theme
new file mode 100644
index 0000000..5551207
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+++ b/oh-my-zsh/custom/themes/example.zsh-theme
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+# Put your custom themes in this folder.
+# See: https://github.com/ohmyzsh/ohmyzsh/wiki/Customization#overriding-and-adding-themes
+#
+# Example:
+
+PROMPT="%{$fg[red]%}%n%{$reset_color%}@%{$fg[blue]%}%m %{$fg[yellow]%}%~ %{$reset_color%}%% "
diff --git a/oh-my-zsh/custom/themes/powerlevel10k b/oh-my-zsh/custom/themes/powerlevel10k
new file mode 160000
index 0000000..36f3045
--- /dev/null
+++ b/oh-my-zsh/custom/themes/powerlevel10k
@@ -0,0 +1 @@
+Subproject commit 36f3045d69d1ba402db09d09eb12b42eebe0fa3b