diff --git a/plugins/clone-app/skills/clone-app/scripts/detect-unity.sh b/plugins/clone-app/skills/clone-app/scripts/detect-unity.sh
new file mode 100755
index 0000000..1f38bb7
--- /dev/null
+++ b/plugins/clone-app/skills/clone-app/scripts/detect-unity.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# Classify an APK/XAPK as a Unity build: il2cpp | mono | none.
+set -uo pipefail
+
+APK="${1:-}"
+if [[ -z "$APK" || ! -f "$APK" ]]; then
+  echo "ERROR: usage: detect-unity.sh <apk-or-xapk>" >&2
+  exit 2
+fi
+
+listing="$(unzip -Z1 "$APK" 2>/dev/null)" || {
+  echo "ERROR: cannot read zip: $APK" >&2; exit 2; }
+
+if grep -q 'global-metadata\.dat' <<<"$listing" \
+   && grep -qi 'libil2cpp\.so' <<<"$listing"; then
+  echo il2cpp; exit 0
+fi
+if grep -Eq 'assets/bin/Data/Managed/.*\.dll' <<<"$listing"; then
+  echo mono; exit 0
+fi
+echo none
+exit 0
diff --git a/plugins/clone-app/tests/test-detect-unity.sh b/plugins/clone-app/tests/test-detect-unity.sh
new file mode 100644
index 0000000..e593ac3
--- /dev/null
+++ b/plugins/clone-app/tests/test-detect-unity.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+set -uo pipefail
+HERE="$(cd "$(dirname "$0")" && pwd)"
+SCRIPT="$HERE/../skills/clone-app/scripts/detect-unity.sh"
+TMP="$(mktemp -d)"
+trap 'rm -rf "$TMP"' EXIT
+fail=0
+check() {
+  local desc="$1" expected="$2" actual="$3"
+  if [[ "$expected" == "$actual" ]]; then echo "PASS: $desc"
+  else echo "FAIL: $desc — expected '$expected' got '$actual'"; fail=1; fi
+}
+
+# Build three fixture zips with python's zipfile (portable, no `zip` needed).
+mkzip() { python3 - "$1" "${@:2}" <<'PY'
+import sys, zipfile
+out = sys.argv[1]
+with zipfile.ZipFile(out, "w") as z:
+    for entry in sys.argv[2:]:
+        z.writestr(entry, "x")
+PY
+}
+
+mkzip "$TMP/il2cpp.apk" "lib/arm64-v8a/libil2cpp.so" "assets/bin/Data/Managed/Metadata/global-metadata.dat"
+mkzip "$TMP/mono.apk"   "assets/bin/Data/Managed/Assembly-CSharp.dll"
+mkzip "$TMP/plain.apk"  "classes.dex" "AndroidManifest.xml"
+
+check "il2cpp"  "il2cpp" "$(bash "$SCRIPT" "$TMP/il2cpp.apk")"
+check "mono"    "mono"   "$(bash "$SCRIPT" "$TMP/mono.apk")"
+check "none"    "none"   "$(bash "$SCRIPT" "$TMP/plain.apk")"
+
+bash "$SCRIPT" >/dev/null 2>&1; rc=$?
+check "usage exit 2" "2" "$rc"
+
+exit $fail