diff --git a/src/plugins/bundled-runtime-deps-materialization.ts b/src/plugins/bundled-runtime-deps-materialization.ts
index eb0bea2834e..ea7bf4becfc 100644
--- a/src/plugins/bundled-runtime-deps-materialization.ts
+++ b/src/plugins/bundled-runtime-deps-materialization.ts
@@ -80,7 +80,14 @@ function hasInstalledRuntimeDepEntryFiles(packageDir: string, packageJson: JsonO
   if (fs.existsSync(mainPath)) {
     return true;
   }
-  return [".js", ".json", ".node"].some((extension) => fs.existsSync(`${mainPath}${extension}`));
+  return (
+    fs.existsSync(`${mainPath}.js`) ||
+    fs.existsSync(`${mainPath}.json`) ||
+    fs.existsSync(`${mainPath}.node`) ||
+    fs.existsSync(path.join(mainPath, "index.js")) ||
+    fs.existsSync(path.join(mainPath, "index.json")) ||
+    fs.existsSync(path.join(mainPath, "index.node"))
+  );
 }
 
 export function isRuntimeDepSatisfied(
diff --git a/src/plugins/bundled-runtime-deps.test.ts b/src/plugins/bundled-runtime-deps.test.ts
index 7fc9bf6279a..ca82c7a5913 100644
--- a/src/plugins/bundled-runtime-deps.test.ts
+++ b/src/plugins/bundled-runtime-deps.test.ts
@@ -10,6 +10,7 @@ import {
   getActiveBundledRuntimeDepsInstallCount,
   waitForBundledRuntimeDepsInstallIdle,
 } from "./bundled-runtime-deps-activity.js";
+import { assertBundledRuntimeDepsInstalled } from "./bundled-runtime-deps-materialization.js";
 import {
   __testing as bundledRuntimeDepsTesting,
   createBundledRuntimeDependencyAliasMap,
@@ -1291,6 +1292,20 @@ describe("scanBundledPluginRuntimeDeps config policy", () => {
     expect(result.conflicts).toEqual([]);
   });
 
+  it("accepts staged runtime deps whose package main relies on Node extension resolution", () => {
+    const installRoot = makeTempDir();
+    const packageDir = path.join(installRoot, "node_modules", "jszip");
+    fs.mkdirSync(path.join(packageDir, "lib"), { recursive: true });
+    fs.writeFileSync(
+      path.join(packageDir, "package.json"),
+      JSON.stringify({ name: "jszip", version: "3.10.1", main: "./lib/index" }),
+      "utf8",
+    );
+    fs.writeFileSync(path.join(packageDir, "lib", "index.js"), "export default {};\n", "utf8");
+
+    expect(() => assertBundledRuntimeDepsInstalled(installRoot, ["jszip@^3.10.1"])).not.toThrow();
+  });
+
   it("reports staged package-level runtime deps as missing when the version is stale", () => {
     const packageRoot = setupPolicyPackageRoot();
     const env = { OPENCLAW_PLUGIN_STAGE_DIR: makeTempDir() };