diff --git a/misc/core.func b/misc/core.func
index 718162c..63744e0 100644
--- a/misc/core.func
+++ b/misc/core.func
@@ -224,76 +224,100 @@ __curl_err_handler() {
 
 ### dev spinner ###
 # Trap cleanup on various signals
-# This function displays an informational message with logging support.
-declare -A MSG_INFO_SHOWN
-SPINNER_ACTIVE=0
-SPINNER_PID=""
-SPINNER_MSG=""
+trap 'cleanup_spinner' EXIT INT TERM HUP
 
-trap 'stop_spinner' EXIT INT TERM HUP
+spinner_frames=('⠋' '⠙' '⠹' '⠸' '⠼' '⠴' '⠦' '⠧' '⠇' '⠏')
 
+# Ensure POSIX compatibility across Alpine and Debian/Ubuntu
+# === Spinner Start ===
 start_spinner() {
   local msg="$1"
-  local frames=(⠋ ⠙ ⠹ ⠸ ⠼ ⠴ ⠦ ⠧ ⠇ ⠏)
   local spin_i=0
   local interval=0.1
 
+  stop_spinner
   SPINNER_MSG="$msg"
-  printf "\r\e[2K" >&2
+  SPINNER_ACTIVE=1
 
   {
-    while [[ "$SPINNER_ACTIVE" -eq 1 ]]; do
-      printf "\r\e[2K%s %b" "${frames[spin_i]}" "${YW}${SPINNER_MSG}${CL}" >&2
-      spin_i=$(((spin_i + 1) % ${#frames[@]}))
+    while [ "$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
   } &
 
-  SPINNER_PID=$!
-  disown "$SPINNER_PID"
-}
-
-stop_spinner() {
-  if [[ ${SPINNER_PID+v} && -n "$SPINNER_PID" ]] && kill -0 "$SPINNER_PID" 2>/dev/null; then
-    kill "$SPINNER_PID" 2>/dev/null
-    sleep 0.1
-    kill -0 "$SPINNER_PID" 2>/dev/null && kill -9 "$SPINNER_PID" 2>/dev/null
-    wait "$SPINNER_PID" 2>/dev/null || true
-  fi
-  SPINNER_ACTIVE=0
-  unset SPINNER_PID
-}
-
-spinner_guard() {
-  if [[ "$SPINNER_ACTIVE" -eq 1 ]] && [[ -n "$SPINNER_PID" ]]; then
-    kill "$SPINNER_PID" 2>/dev/null
-    wait "$SPINNER_PID" 2>/dev/null || true
+  local pid=$!
+  if kill -0 "$pid" 2>/dev/null; then
+    SPINNER_PID="$pid"
+    disown "$SPINNER_PID" 2>/dev/null || true
+  else
     SPINNER_ACTIVE=0
-    unset SPINNER_PID
+    SPINNER_PID=""
   fi
 }
 
+# === Spinner Stop (No wait!) ===
+stop_spinner() {
+  if [[ "$SPINNER_ACTIVE" -eq 1 && -n "$SPINNER_PID" ]]; then
+    SPINNER_ACTIVE=0
+
+    if kill -0 "$SPINNER_PID" 2>/dev/null; then
+      kill "$SPINNER_PID" 2>/dev/null || true
+      for _ in $(seq 1 10); do
+        sleep 0.05
+        kill -0 "$SPINNER_PID" 2>/dev/null || break
+      done
+    fi
+
+    if [[ "$SPINNER_PID" =~ ^[0-9]+$ ]]; then
+      wait "$SPINNER_PID" 2>/dev/null || true
+    fi
+
+    printf "\r\e[2K" >&2
+    SPINNER_PID=""
+  fi
+}
+
+# === Cleanup Spinner on signals ===
+cleanup_spinner() {
+  stop_spinner
+}
+
+# === msg_info ===
 msg_info() {
   local msg="$1"
-  [[ -n "${MSG_INFO_SHOWN["$msg"]+x}" ]] && return
+  [ -z "$msg" ] && return
+  if [ -n "${MSG_INFO_SHOWN["$msg"]+x}" ]; then return; fi
   MSG_INFO_SHOWN["$msg"]=1
-
-  spinner_guard
-  SPINNER_ACTIVE=1
+  stop_spinner
   start_spinner "$msg"
 }
 
+# === msg_ok ===
 msg_ok() {
   local msg="$1"
-  stop_spinner
-  printf "\r\e[2K%s %b\n" "${CM}" "${GN}${msg}${CL}" >&2
+  [ -z "$msg" ] && return
+  if [ "$SPINNER_ACTIVE" -eq 1 ]; then
+    stop_spinner
+  else
+    printf "\r\e[2K" >&2
+  fi
+  printf "\r\e[2K%s %b\n" "$CM" "${GN}${msg}${CL}" >&2
   unset MSG_INFO_SHOWN["$msg"]
 }
 
+# === msg_error ===
 msg_error() {
-  stop_spinner
   local msg="$1"
-  printf "\r\e[2K%s %b\n" "${CROSS}" "${RD}${msg}${CL}" >&2
+  [ -z "$msg" ] && return
+  stop_spinner
+  printf "\r\e[2K%s %b\n" "$CROSS" "${RD}${msg}${CL}" >&2
 }
 
 # === msg_warn ===