diff --git a/cmd/arcrun-app/check-tray.sh b/cmd/arcrun-app/check-tray.sh
new file mode 100755
index 0000000..ec5609a
--- /dev/null
+++ b/cmd/arcrun-app/check-tray.sh
@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+# check-tray.sh — 托盤行為的機械閘（t194，leo 真機測出四個 bug 後補）
+#
+# 🔴 為什麼要有：這四個 bug **編得過、也跑得起來**，只有真的去點才會發現。
+#    我改完只驗「build ok」就想交，被交付警察攔下。
+#    ⇒ 把「點不下去的部分」用可機械檢查的**前置條件**守住。
+set -uo pipefail
+cd "$(dirname "$0")"
+FAIL=0
+ok(){ printf "  ✅ %s\n" "$1"; }
+ng(){ printf "  ❌ %s\n" "$1"; FAIL=1; }
+
+echo "━━━ 托盤行為前置條件 ━━━"
+
+# ① template icon：純黑＋大量透明、尺寸 22/44
+python3 - <<'PY' || exit 1
+import zlib,struct,sys
+d=open('build/trayicon.png','rb').read()
+pos=8; idat=b''; w=h=ct=0
+while pos<len(d):
+    ln=struct.unpack('>I',d[pos:pos+4])[0]; t=d[pos+4:pos+8]
+    if t==b'IHDR': w,h,_,ct=struct.unpack('>IIBB',d[pos+8:pos+18])
+    if t==b'IDAT': idat+=d[pos+8:pos+8+ln]
+    pos+=12+ln
+if w not in (22,44) or ct!=6:
+    print(f"  ❌ tray icon 應為 22/44 的 RGBA，got {w}x{h} ct={ct}"); sys.exit(1)
+raw=zlib.decompress(idat); ch=4; stride=w*ch+1
+rows=[];prev=bytearray(w*ch)
+for y in range(h):
+    f=raw[y*stride];line=bytearray(raw[y*stride+1:(y+1)*stride])
+    for i in range(len(line)):
+        a=line[i-ch] if i>=ch else 0;b=prev[i];c=prev[i-ch] if i>=ch else 0
+        if f==1: line[i]=(line[i]+a)&255
+        elif f==2: line[i]=(line[i]+b)&255
+        elif f==3: line[i]=(line[i]+(a+b)//2)&255
+        elif f==4:
+            pp=a+b-c;pa,pb,pc=abs(pp-a),abs(pp-b),abs(pp-c)
+            pr=a if(pa<=pb and pa<=pc) else (b if pb<=pc else c)
+            line[i]=(line[i]+pr)&255
+    rows.append(bytes(line));prev=line
+al=[rows[y][x*4+3] for y in range(h) for x in range(w)]
+opq=sum(1 for a in al if a>200)
+if opq > len(al)*0.5:
+    print(f"  ❌ tray icon 幾乎全不透明（{100*opq//len(al)}%）⇒ 會顯示成方塊"); sys.exit(1)
+cols={tuple(rows[y][x*4:x*4+3]) for y in range(h) for x in range(w) if rows[y][x*4+3]>200}
+print(f"  ✅ template icon：{w}x{h}、不透明 {100*opq//len(al)}%、顏色 {len(cols)} 種 {list(cols)[:1]}")
+PY
+
+# ② 呼叫順序：AddMenuItem → SetMenuNil → SetOnClick/SetOnRClick
+python3 - <<'PY' || exit 1
+import sys
+s=open('main.go',encoding='utf-8').read()
+try:
+    a=s.index('systray.AddMenuItem'); n=s.index('systray.SetMenuNil')
+    c=s.index('systray.SetOnClick'); r=s.index('systray.SetOnRClick')
+except ValueError as e:
+    print(f"  ❌ 找不到必要呼叫：{e}"); sys.exit(1)
+if not (a < n < c and n < r):
+    print("  ❌ 順序錯：必須 AddMenuItem → SetMenuNil → SetOnClick/SetOnRClick"); sys.exit(1)
+print("  ✅ 順序正確（建選單→清掉→註冊滑鼠事件）")
+PY
+
+# ③ ShowWindow 要能叫回「已開但被蓋住」的視窗
+for f in WindowUnminimise WindowShow WindowSetAlwaysOnTop; do
+  grep -q "runtime.$f" app.go && ok "ShowWindow 有 $f" || ng "ShowWindow 缺 $f（叫不回被蓋住的視窗）"
+done
+
+# ④ 結束路徑：收訊號 → 停子行程 → 等它真的不見
+grep -q "signal.Notify" supervise.go && ok "有處理 SIGTERM/SIGINT" || ng "沒有訊號處理（只能強制結束）"
+grep -q "waitCollectorGone" supervise.go && ok "結束前會等 collector 真的不見" || ng "沒等子行程 ⇒ 會留孤兒"
+
+echo
+[ $FAIL -eq 0 ] && echo "✅ 托盤前置條件全過" || { echo "❌ 未過——不准交貨"; exit 1; }