diff --git a/packages/loopover-engine/src/review/content-lane/content-repo-spec.ts b/packages/loopover-engine/src/review/content-lane/content-repo-spec.ts
index 3775fda10b..a2998f7d96 100644
--- a/packages/loopover-engine/src/review/content-lane/content-repo-spec.ts
+++ b/packages/loopover-engine/src/review/content-lane/content-repo-spec.ts
@@ -66,6 +66,30 @@ export const AWESOME_CLAUDE_CONTENT_SPEC: ContentRepoSpec = {
     "submittedByUrl",
     "sourceSubmissionNumber",
     "sourceSubmissionUrl",
+    // snake_case aliases, matching urlFields/sourceUrlFields's pairing convention (#7445, same divergence class as
+    // #7250): protectedFrontmatterChanges compares before[field]/after[field] by the literal parsed key, so a
+    // protected field written in the legitimately-accepted snake_case convention (e.g. `download_url`) was invisible
+    // to this gate — a real protected-close bypass. `author`, `category`, `disclosure`, `slug` are single
+    // all-lowercase words (camelCase and snake_case are byte-identical), so no separate alias is needed for them.
+    "affiliate_url",
+    "author_profile_url",
+    "claim_status",
+    "claim_url",
+    "date_added",
+    "download_url",
+    "import_pr_number",
+    "import_pr_url",
+    "package_url",
+    "package_verified",
+    "pricing_model",
+    "reviewed_at",
+    "reviewed_by",
+    "reviewed_pr_number",
+    "submitted_at",
+    "submitted_by",
+    "submitted_by_url",
+    "source_submission_number",
+    "source_submission_url",
   ]),
   urlFields: new Set([
     "documentationUrl",
diff --git a/test/unit/content-lane-duplicates.test.ts b/test/unit/content-lane-duplicates.test.ts
index 49b83c73e9..9d63f1846b 100644
--- a/test/unit/content-lane-duplicates.test.ts
+++ b/test/unit/content-lane-duplicates.test.ts
@@ -96,6 +96,24 @@ describe("protectedFrontmatterChanges", () => {
     const after = mdx({ title: "T", slug: "a", author: "Alice" });
     expect(protectedFrontmatterChanges(before, after)).toEqual([]);
   });
+
+  it("flags a changed protected field written in the snake_case alias (e.g. download_url), matching the camelCase behavior (#7445)", () => {
+    // Before #7445, protectedFrontmatterFields listed only downloadUrl (camelCase), so an entry using the
+    // legitimately-accepted snake_case key was invisible to this gate even though urlFields already treats
+    // download_url as an equally-valid alias for duplicate detection.
+    const before = mdx({ title: "T", slug: "a", download_url: "https://example.com/old.zip" });
+    const after = mdx({ title: "T", slug: "a", download_url: "https://example.com/new.zip" });
+    expect(protectedFrontmatterChanges(before, after)).toEqual(["download_url"]);
+  });
+
+  it("every multi-word camelCase protectedFrontmatterFields member has its snake_case alias present too (#7445, mirrors #7250's urlFields pairing assertion)", () => {
+    const singleLowercaseWords = new Set(["author", "category", "disclosure", "slug"]);
+    const toSnakeCase = (field: string): string => field.replace(/[A-Z]/g, (letter) => `_${letter.toLowerCase()}`);
+    for (const field of AWESOME_CLAUDE_CONTENT_SPEC.protectedFrontmatterFields) {
+      if (singleLowercaseWords.has(field) || field.includes("_")) continue;
+      expect(AWESOME_CLAUDE_CONTENT_SPEC.protectedFrontmatterFields.has(toSnakeCase(field))).toBe(true);
+    }
+  });
 });
 
 describe("extractContentDuplicateSignals + strict match", () => {