From ced335e626d8290670baee657433a290950caf63 Mon Sep 17 00:00:00 2001
From: Vance Ingalls <vance@heygen.com>
Date: Sat, 2 May 2026 11:47:07 -0700
Subject: [PATCH] fix: apply nested manual edits in drilled previews

---
 .../src/components/editor/manualEdits.test.ts | 42 +++++++++++++++++++
 .../src/components/editor/manualEdits.ts      |  6 ---
 2 files changed, 42 insertions(+), 6 deletions(-)

diff --git a/packages/studio/src/components/editor/manualEdits.test.ts b/packages/studio/src/components/editor/manualEdits.test.ts
index 89f26b0f18..4be1db5dd8 100644
--- a/packages/studio/src/components/editor/manualEdits.test.ts
+++ b/packages/studio/src/components/editor/manualEdits.test.ts
@@ -657,6 +657,48 @@ describe("studio manual edits", () => {
     expect(readStudioPathOffset(nestedCard)).toEqual({ x: 24, y: 12 });
   });
 
+  it("applies nested source edits while previewing a non-index parent composition", () => {
+    const document = createDocument(`
+      <div data-composition-id="parent">
+        <div id="parent-card"></div>
+        <div data-composition-file="scenes/child.html">
+          <div id="child-card"></div>
+        </div>
+      </div>
+    `);
+    const parentCard = document.getElementById("parent-card") as HTMLElement;
+    const childCard = document.getElementById("child-card") as HTMLElement;
+    const manifest = parseStudioManualEditManifest(`{
+      "version": 1,
+      "edits": [
+        {
+          "kind": "path-offset",
+          "target": {
+            "sourceFile": "scenes/parent.html",
+            "selector": "#parent-card",
+            "id": "parent-card"
+          },
+          "x": 12,
+          "y": 8
+        },
+        {
+          "kind": "path-offset",
+          "target": {
+            "sourceFile": "scenes/child.html",
+            "selector": "#child-card",
+            "id": "child-card"
+          },
+          "x": 36,
+          "y": 18
+        }
+      ]
+    }`);
+
+    expect(applyStudioManualEditManifest(document, manifest, "scenes/parent.html")).toBe(2);
+    expect(readStudioPathOffset(parentCard)).toEqual({ x: 12, y: 8 });
+    expect(readStudioPathOffset(childCard)).toEqual({ x: 36, y: 18 });
+  });
+
   it("applies and clears manifest box sizes while restoring authored inline size", () => {
     const document = createDocument(`
       <div style="display: flex; flex-direction: row">
diff --git a/packages/studio/src/components/editor/manualEdits.ts b/packages/studio/src/components/editor/manualEdits.ts
index 057c60dd7b..db412223fb 100644
--- a/packages/studio/src/components/editor/manualEdits.ts
+++ b/packages/studio/src/components/editor/manualEdits.ts
@@ -1232,11 +1232,6 @@ export function installStudioManualEditSeekReapply(win: Window, apply: () => voi
   );
 }
 
-function sourceFileMatches(activeCompositionPath: string | null, sourceFile: string): boolean {
-  if (!activeCompositionPath || activeCompositionPath === "index.html") return true;
-  return activeCompositionPath === sourceFile;
-}
-
 function getManualEditSourceFileForElement(
   el: HTMLElement,
   activeCompositionPath: string | null,
@@ -1286,7 +1281,6 @@ function resolveManualEditTarget(
   edit: StudioManualEdit,
   activeCompositionPath: string | null,
 ): HTMLElement | null {
-  if (!sourceFileMatches(activeCompositionPath, edit.target.sourceFile)) return null;
   const htmlElement = doc.defaultView?.HTMLElement;
   if (!htmlElement) return null;