diff --git a/ct/unifi-os-server.sh b/ct/unifi-os-server.sh
new file mode 100644
index 000000000..a6da9d366
--- /dev/null
+++ b/ct/unifi-os-server.sh
@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+source <(curl -fsSL https://git.community-scripts.org/community-scripts/ProxmoxVED/raw/branch/main/misc/build.func)
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: MickLesk (CanbiZ)
+# License: MIT | https://github.com/community-scripts/ProxmoxVED/raw/main/LICENSE
+# Source: https://ui.com/
+
+APP="UniFi OS Server"
+var_tags="${var_tags:-network}"
+var_cpu="${var_cpu:-2}"
+var_ram="${var_ram:-4096}"
+var_disk="${var_disk:-20}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-12}"
+var_unprivileged="${var_unprivileged:-0}"
+var_tun="${var_tun:-yes}"
+var_nesting="${var_nesting:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+  if [[ ! -f /usr/local/sbin/unifi-os-server.bin && ! -d /data/unifi ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+  msg_error "UniFi OS Server updates are handled by the UniFi OS app itself."
+  exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
diff --git a/install/unifi-os-server-install.sh b/install/unifi-os-server-install.sh
new file mode 100644
index 000000000..58dea42cf
--- /dev/null
+++ b/install/unifi-os-server-install.sh
@@ -0,0 +1,81 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: MickLesk (CanbiZ)
+# License: MIT | https://github.com/community-scripts/ProxmoxVED/raw/main/LICENSE
+# Source: https://ui.com/
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+if [[ "${CTTYPE:-1}" != "0" ]]; then
+  msg_error "UniFi OS Server requires a privileged LXC container."
+  msg_error "Recreate the container with unprivileged=0."
+  exit 1
+fi
+
+if [[ ! -e /dev/net/tun ]]; then
+  msg_error "Missing /dev/net/tun in container."
+  msg_error "Enable TUN/TAP (var_tun=yes) or add /dev/net/tun passthrough."
+  exit 1
+fi
+
+msg_info "Installing dependencies"
+$STD apt-get install -y ca-certificates curl jq podman uidmap slirp4netns wget
+msg_ok "Installed dependencies"
+
+msg_info "Installing sysctl wrapper (ignore non-critical errors)"
+cat <<'EOF' >/usr/local/sbin/sysctl
+#!/bin/sh
+/usr/sbin/sysctl "$@" || true
+exit 0
+EOF
+chmod +x /usr/local/sbin/sysctl
+export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+msg_ok "Sysctl wrapper installed"
+
+msg_info "Fetching latest UniFi OS Server"
+API_URL="https://fw-update.ui.com/api/firmware-latest"
+TEMP_JSON="$(mktemp)"
+if ! curl -fsSL "$API_URL" -o "$TEMP_JSON"; then
+  rm -f "$TEMP_JSON"
+  msg_error "Failed to fetch data from Ubiquiti API"
+  exit 1
+fi
+
+LATEST=$(jq -r '
+  ._embedded.firmware
+  | map(select(.product == "unifi-os-server"))
+  | map(select(.platform == "linux-x64"))
+  | sort_by(.version_major, .version_minor, .version_patch)
+  | last
+' "$TEMP_JSON")
+
+UOS_VERSION=$(echo "$LATEST" | jq -r '.version' | sed 's/^v//')
+UOS_URL=$(echo "$LATEST" | jq -r '._links.data.href')
+rm -f "$TEMP_JSON"
+
+if [[ -z "$UOS_URL" || -z "$UOS_VERSION" || "$UOS_URL" == "null" ]]; then
+  msg_error "Failed to parse UniFi OS Server version or download URL"
+  exit 1
+fi
+msg_ok "Found UniFi OS Server ${UOS_VERSION}"
+
+msg_info "Downloading UniFi OS Server installer"
+mkdir -p /usr/local/sbin
+curl -fsSL "$UOS_URL" -o /usr/local/sbin/unifi-os-server.bin
+chmod +x /usr/local/sbin/unifi-os-server.bin
+msg_ok "Downloaded UniFi OS Server installer"
+
+msg_info "Installing UniFi OS Server (this takes a few minutes)"
+echo y | /usr/local/sbin/unifi-os-server.bin
+msg_ok "UniFi OS Server installed"
+
+motd_ssh
+customize
+cleanup_lxc
diff --git a/misc/alpine-tools.func b/misc/alpine-tools.func
index 5a1043b94..955554216 100644
--- a/misc/alpine-tools.func
+++ b/misc/alpine-tools.func
@@ -3,6 +3,20 @@
 
 # Erwartet vorhandene msg_* und optional $STD aus deinem Framework.
 
+# Fallbacks, wenn core.func nicht geladen wurde (Alpine/ash-safe)
+if ! command -v msg_info >/dev/null 2>&1; then
+  msg_info() { echo "[INFO] $*"; }
+fi
+if ! command -v msg_ok >/dev/null 2>&1; then
+  msg_ok() { echo "[OK] $*"; }
+fi
+if ! command -v msg_warn >/dev/null 2>&1; then
+  msg_warn() { echo "[WARN] $*"; }
+fi
+if ! command -v msg_error >/dev/null 2>&1; then
+  msg_error() { echo "[ERROR] $*" >&2; }
+fi
+
 # ------------------------------
 # helpers
 # ------------------------------