diff --git a/misc/core.func b/misc/core.func
index 44adce5..bcc4ac1 100644
--- a/misc/core.func
+++ b/misc/core.func
@@ -222,6 +222,20 @@ __curl_err_handler() {
   exit 1
 }
 
+detect_os_type() {
+  if [[ -f /etc/os-release ]]; then
+    local os_id
+    os_id=$(awk -F= '/^ID=/{print $2}' /etc/os-release | tr -d '"')
+    case "$os_id" in
+    alpine) VAR_OS="alpine" ;;
+    debian | ubuntu) VAR_OS="debian" ;;
+    *) VAR_OS="other" ;;
+    esac
+  else
+    VAR_OS="unknown"
+  fi
+}
+
 ### dev spinner ###
 # Trap cleanup on various signals
 trap 'cleanup_spinner' EXIT INT TERM HUP
@@ -239,21 +253,30 @@ start_spinner() {
   SPINNER_MSG="$msg"
   SPINNER_ACTIVE=1
 
-  {
-    while [[ "$SPINNER_ACTIVE" -eq 1 ]]; do
-      if [[ -t 2 ]]; then
-        printf "\r\e[2K%s %b" "${TAB}${spinner_frames[spin_i]}${TAB}" "${YW}${SPINNER_MSG}${CL}" >&2
-      else
-        printf "%s...\n" "$SPINNER_MSG" >&2
-        break
-      fi
-      spin_i=$(((spin_i + 1) % ${#spinner_frames[@]}))
-      sleep "$interval"
-    done
-  } &
+  if [[ "$VAR_OS" == "alpine" ]]; then
+    {
+      while [[ "$SPINNER_ACTIVE" -eq 1 ]]; do
+        printf "\r\e[2K⠋ %b" "$SPINNER_MSG" >&2
+        sleep "$interval"
+      done
+    } &
+  else
+    {
+      while [[ "$SPINNER_ACTIVE" -eq 1 ]]; do
+        if [[ -t 2 ]]; then
+          printf "\r\e[2K%s %b" "${TAB}${spinner_frames[spin_i]}${TAB}" "${YW}${SPINNER_MSG}${CL}" >&2
+        else
+          printf "%s...\n" "$SPINNER_MSG" >&2
+          break
+        fi
+        spin_i=$(((spin_i + 1) % ${#spinner_frames[@]}))
+        sleep "$interval"
+      done
+    } &
+  fi
 
   local pid=$!
-  if ps -p "$pid" >/dev/null 2>&1; then
+  if kill -0 "$pid" 2>/dev/null; then
     SPINNER_PID="$pid"
   else
     SPINNER_ACTIVE=0
@@ -261,7 +284,6 @@ start_spinner() {
   fi
 }
 
-# === Spinner Stop ===
 stop_spinner() {
   if [[ "$SPINNER_ACTIVE" -eq 1 && -n "$SPINNER_PID" ]]; then
     SPINNER_ACTIVE=0
@@ -274,8 +296,8 @@ stop_spinner() {
       done
     fi
 
-    if [[ "$SPINNER_PID" =~ ^[0-9]+$ ]]; then
-      ps -p "$SPINNER_PID" -o pid= >/dev/null 2>&1 && wait "$SPINNER_PID" 2>/dev/null || true
+    if [[ "$SPINNER_PID" =~ ^[0-9]+$ ]] && ps -p "$SPINNER_PID" -o pid= >/dev/null 2>&1; then
+      wait "$SPINNER_PID" 2>/dev/null || true
     fi
 
     printf "\r\e[2K" >&2
@@ -283,57 +305,46 @@ stop_spinner() {
   fi
 }
 
-# === Cleanup Spinner on signals ===
 cleanup_spinner() {
   stop_spinner
 }
 
-# === msg_info ===
 msg_info() {
   local msg="$1"
-  [ -z "$msg" ] && return
-  if [ -n "${MSG_INFO_SHOWN["$msg"]+x}" ]; then return; fi
+  [[ -z "$msg" || -n "${MSG_INFO_SHOWN["$msg"]+x}" ]] && return
   MSG_INFO_SHOWN["$msg"]=1
   stop_spinner
   start_spinner "$msg"
 }
 
-# === msg_ok ===
 msg_ok() {
   local msg="$1"
-  [ -z "$msg" ] && return
-  if [ "$SPINNER_ACTIVE" -eq 1 ]; then
-    stop_spinner
-  else
-    printf "\r\e[2K" >&2
-  fi
+  [[ -z "$msg" ]] && return
+  stop_spinner
   printf "\r\e[2K%s %b\n" "$CM" "${GN}${msg}${CL}" >&2
   unset MSG_INFO_SHOWN["$msg"]
 }
 
-# === msg_error ===
 msg_error() {
   local msg="$1"
-  [ -z "$msg" ] && return
+  [[ -z "$msg" ]] && return
   stop_spinner
   printf "\r\e[2K%s %b\n" "$CROSS" "${RD}${msg}${CL}" >&2
 }
 
-# === msg_warn ===
 msg_warn() {
   local msg="$1"
-  [ -z "$msg" ] && return
+  [[ -z "$msg" ]] && return
   stop_spinner
   printf "\r\e[2K%s %b\n" "$INFO" "${YWB}${msg}${CL}" >&2
   unset MSG_INFO_SHOWN["$msg"]
 }
 
-# === msg_custom ===
 msg_custom() {
   local symbol="$1"
   local color="$2"
   local msg="$3"
-  [ -z "$msg" ] && return
+  [[ -z "$msg" ]] && return
   stop_spinner
   printf "\r\e[2K%s %b\n" "$symbol" "${color}${msg}${CL}" >&2
 }
@@ -343,15 +354,11 @@ msg_progress() {
   local total="$2"
   local label="$3"
   local width=40
-  local filled
-  local percent
-  local bar
-  local empty
+  local filled percent bar empty
   local fill_char="#"
   local empty_char="-"
 
-  # Sanitize and validate input
-  if ! [[ "$current" =~ ^[0-9]+$ ]] || ! [[ "$total" =~ ^[0-9]+$ ]] || [ "$total" -eq 0 ]; then
+  if ! [[ "$current" =~ ^[0-9]+$ ]] || ! [[ "$total" =~ ^[0-9]+$ ]] || [[ "$total" -eq 0 ]]; then
     printf "\r\e[2K%s %b\n" "$CROSS" "${RD}Invalid progress input${CL}" >&2
     return
   fi
@@ -363,11 +370,9 @@ msg_progress() {
   bar=$(printf "%${filled}s" | tr ' ' "$fill_char")
   bar+=$(printf "%${empty}s" | tr ' ' "$empty_char")
 
-  # Print the progress line
   printf "\r\e[2K%s [%s] %3d%% %s" "${TAB}" "$bar" "$percent" "$label" >&2
 
-  # Final newline when complete
-  if [ "$current" -eq "$total" ]; then
+  if [[ "$current" -eq "$total" ]]; then
     printf "\n" >&2
   fi
 }