diff --git a/AGENTS.md b/AGENTS.md
index f3d14f6..0309f19 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -25,6 +25,7 @@ MUST:
 - Pinna images till explicit version eller digest.
 - Inte använda `:latest`.
 - Hålla volymer snäva (`/DATA/AppData/$AppID/...`).
+- Vid förslag/byte av `image:` måste imagen verifieras online (manifest/tag finns i registry) innan merge.
 
 SHOULD:
 - `security_opt: ["no-new-privileges:true"]`
diff --git a/scripts/build-appstore-zip.sh b/scripts/build-appstore-zip.sh
index cce95f3..dddf634 100755
--- a/scripts/build-appstore-zip.sh
+++ b/scripts/build-appstore-zip.sh
@@ -3,6 +3,7 @@ set -euo pipefail
 
 repo_root="$(cd "$(dirname "$0")/.." && pwd)"
 push_mode=0
+strict_image_check=0
 positional=()
 
 while [[ $# -gt 0 ]]; do
@@ -11,6 +12,10 @@ while [[ $# -gt 0 ]]; do
       push_mode=1
       shift
       ;;
+    --strict-images)
+      strict_image_check=1
+      shift
+      ;;
     -h|--help)
       # handled below via usage
       positional+=("$1")
@@ -36,11 +41,14 @@ usage() {
   cat <<USAGE
 Usage: $0 [output_dir] [zip_name]
        $0 --push [output_dir] [zip_name]
+       $0 --strict-images [output_dir] [zip_name]
+       $0 --push --strict-images [output_dir] [zip_name]
 
 Examples:
   $0
   $0 ./dist zima-apps-main.zip
   $0 --push
+  $0 --strict-images
 USAGE
 }
 
@@ -54,6 +62,10 @@ if ! command -v zip >/dev/null 2>&1; then
   exit 1
 fi
 
+if [[ "${CI:-}" == "true" || "${GITEA_ACTIONS:-}" == "true" ]]; then
+  strict_image_check=1
+fi
+
 required_root_files=(
   "category-list.json"
   "recommend-list.json"
@@ -72,6 +84,81 @@ if [[ ! -d "$repo_root/Apps" ]]; then
   exit 1
 fi
 
+extract_images_from_compose() {
+  local compose_file="$1"
+  awk '
+    /^[[:space:]]*image:[[:space:]]*/ {
+      line=$0
+      sub(/^[[:space:]]*image:[[:space:]]*/, "", line)
+      sub(/[[:space:]]+#.*/, "", line)
+      gsub(/^["'"'"']|["'"'"']$/, "", line)
+      if (line != "") print line
+    }
+  ' "$compose_file"
+}
+
+verify_images_online() {
+  local -a images=()
+  local -a missing=()
+  local compose_file app_id
+
+  while IFS= read -r compose_file; do
+    app_id="$(basename "$(dirname "$compose_file")")"
+    if [[ "$app_id" == "_template" ]]; then
+      continue
+    fi
+
+    while IFS= read -r image_ref; do
+      [[ -z "$image_ref" ]] && continue
+      images+=("$image_ref")
+    done < <(extract_images_from_compose "$compose_file")
+  done < <(find "$repo_root/Apps" -type f -name 'docker-compose.yaml' | sort)
+
+  if [[ ${#images[@]} -eq 0 ]]; then
+    echo "WARN: no images found to verify"
+    return 0
+  fi
+
+  mapfile -t images < <(printf '%s\n' "${images[@]}" | sort -u)
+
+  if ! command -v docker >/dev/null 2>&1; then
+    echo "WARN: docker is not installed; skipping online image verification"
+    if [[ "$strict_image_check" -eq 1 ]]; then
+      echo "ERROR: strict image verification is enabled (CI/Gitea or --strict-images)"
+      return 1
+    fi
+    return 0
+  fi
+
+  echo "Verifying ${#images[@]} image(s) online..."
+  for image_ref in "${images[@]}"; do
+    if docker manifest inspect "$image_ref" >/dev/null 2>&1; then
+      echo "OK: $image_ref"
+    else
+      echo "WARN: image not found or inaccessible: $image_ref"
+      missing+=("$image_ref")
+    fi
+  done
+
+  if [[ ${#missing[@]} -gt 0 ]]; then
+    echo
+    echo "Image verification warnings:"
+    for image_ref in "${missing[@]}"; do
+      echo "  - $image_ref"
+    done
+
+    if [[ "$strict_image_check" -eq 1 ]]; then
+      echo
+      echo "ERROR: strict image verification is enabled and one or more images are missing."
+      return 1
+    fi
+  fi
+}
+
+if ! verify_images_online; then
+  exit 1
+fi
+
 is_git_repo=0
 if git -C "$repo_root" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
   is_git_repo=1