diff --git a/packages/core/src/studio-api/helpers/safePath.test.ts b/packages/core/src/studio-api/helpers/safePath.test.ts
index fbfce353f..4a431792d 100644
--- a/packages/core/src/studio-api/helpers/safePath.test.ts
+++ b/packages/core/src/studio-api/helpers/safePath.test.ts
@@ -19,7 +19,7 @@ function createProjectDir(): string {
 }
 
 describe("walkDir", () => {
-  it("hides internal HyperFrames files from project listings", () => {
+  it("hides only internal HyperFrames backups, not vendored dot-directory files", () => {
     const projectDir = createProjectDir();
     mkdirSync(join(projectDir, ".hyperframes", "backup"), { recursive: true });
     mkdirSync(join(projectDir, ".hyperframes", "examples"), { recursive: true });
@@ -31,9 +31,11 @@ describe("walkDir", () => {
     writeFileSync(join(projectDir, "compositions", "scene.html"), "scene");
 
     const files = walkDir(projectDir);
+    // Vendored dot-dir files stay browsable in the file tree (#1366) — only
+    // Studio's own backup snapshots are hidden (shouldIgnoreDir).
     expect(files).toContain(".cache/examples/preset.html");
+    expect(files).toContain(".hyperframes/examples/preset.html");
     expect(files).toContain("compositions/scene.html");
     expect(files).not.toContain(".hyperframes/backup/snapshot.html");
-    expect(files).not.toContain(".hyperframes/examples/preset.html");
   });
 });
diff --git a/packages/core/src/studio-api/helpers/safePath.ts b/packages/core/src/studio-api/helpers/safePath.ts
index 4da2a529d..2f9a18e56 100644
--- a/packages/core/src/studio-api/helpers/safePath.ts
+++ b/packages/core/src/studio-api/helpers/safePath.ts
@@ -6,7 +6,11 @@ import { readdirSync } from "node:fs";
 // Re-exported here for back-compat with existing `../helpers/safePath.js` imports.
 export { isSafePath } from "../../safePath.js";
 
-const IGNORE_DIRS = new Set([".thumbnails", ".hyperframes", "node_modules", ".git"]);
+const IGNORE_DIRS = new Set([".thumbnails", "node_modules", ".git"]);
+
+function shouldIgnoreDir(rel: string): boolean {
+  return rel === ".hyperframes/backup";
+}
 
 /**
  * True when any directory segment of a relative path is a dot-directory or
@@ -25,7 +29,7 @@ export function walkDir(dir: string, prefix = ""): string[] {
   const files: string[] = [];
   for (const entry of readdirSync(dir, { withFileTypes: true })) {
     const rel = prefix ? `${prefix}/${entry.name}` : entry.name;
-    if (IGNORE_DIRS.has(entry.name)) continue;
+    if (IGNORE_DIRS.has(entry.name) || shouldIgnoreDir(rel)) continue;
     if (entry.isDirectory()) {
       files.push(...walkDir(join(dir, entry.name), rel));
     } else {