diff --git a/packages/loopover-engine/src/review/diff-file-priority.ts b/packages/loopover-engine/src/review/diff-file-priority.ts
index f26087f938..37c4f9bba8 100644
--- a/packages/loopover-engine/src/review/diff-file-priority.ts
+++ b/packages/loopover-engine/src/review/diff-file-priority.ts
@@ -2,7 +2,10 @@ import { isTestPath } from "../signals/test-evidence.js";
 
 export function diffFilePriority(path: string): number {
   if (/(^|\/)(package-lock\.json|npm-shrinkwrap\.json|pnpm-lock\.yaml|yarn\.lock|bun\.lock|bun\.lockb|cargo\.lock|poetry\.lock|pipfile\.lock|composer\.lock|gemfile\.lock|go\.sum|go\.work\.sum|uv\.lock|packages\.lock\.json|flake\.lock|deno\.lock|pubspec\.lock|podfile\.lock|mix\.lock|package\.resolved|gradle\.lockfile|pdm\.lock|conan\.lock|pixi\.lock|cartfile\.resolved|gopkg\.lock|shard\.lock|rebar\.lock|renv\.lock|chart\.lock)$|\.(min\.(js|css)|map|snap)$/i.test(path)) return 4;
-  if (/(^|\/)(dist|build|out|coverage|vendor|node_modules)\//i.test(path)) return 4;
+  // Must stay in sync with signals/path-matchers.ts's isVendoredFileFrom -- the two already had this
+  // obligation implicitly (bower_components/jspm_packages were added there in #2777 with no corresponding
+  // update here, #7526) and now match the same directory-name set exactly.
+  if (/(^|\/)(dist|build|out|coverage|vendor|vendored|third_party|third-party|node_modules|bower_components|jspm_packages)\//i.test(path)) return 4;
   if (/\.(md|mdx|markdown|rst|adoc|asciidoc|txt)$/i.test(path)) return 2;
   if (isTestPath(path)) return 1;
   return 0;
diff --git a/packages/loopover-engine/test/diff-file-priority.test.ts b/packages/loopover-engine/test/diff-file-priority.test.ts
index 885bc1b1da..b372de266b 100644
--- a/packages/loopover-engine/test/diff-file-priority.test.ts
+++ b/packages/loopover-engine/test/diff-file-priority.test.ts
@@ -30,3 +30,23 @@ test("predictedGateEngineInternals.sharesMeaningfulFile: a shared Cartfile.resol
   );
   assert.equal(predictedGateEngineInternals.sharesMeaningfulFile(["src/app.ts"], ["src/app.ts"]), true);
 });
+
+test("diffFilePriority: ranks every vendored-directory name path-matchers.ts's isVendoredFileFrom recognizes (#7526)", () => {
+  assert.equal(diffFilePriority("vendor/x.js"), 4);
+  assert.equal(diffFilePriority("vendored/x.js"), 4);
+  assert.equal(diffFilePriority("third_party/x.js"), 4);
+  assert.equal(diffFilePriority("third-party/x.js"), 4);
+  assert.equal(diffFilePriority("bower_components/x.js"), 4);
+  assert.equal(diffFilePriority("jspm_packages/x.js"), 4);
+});
+
+test("predictedGateEngineInternals.sharesMeaningfulFile: a file shared only under a vendored directory is not meaningful collision evidence (#7526)", () => {
+  assert.equal(
+    predictedGateEngineInternals.sharesMeaningfulFile(["third_party/lib.js"], ["third_party/lib.js"]),
+    false,
+  );
+  assert.equal(
+    predictedGateEngineInternals.sharesMeaningfulFile(["bower_components/lib.js"], ["bower_components/lib.js"]),
+    false,
+  );
+});