diff --git a/CHANGELOG.md b/CHANGELOG.md
index 821777455c6..6d46b8bafb0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Plugins/runtime-deps: verify staged package entry files before reusing mirrored runtime roots, so browser-control repairs incomplete `ajv`/MCP SDK installs after update instead of failing after restart on a missing `ajv/dist/ajv.js`. Refs #74630. Thanks @spickeringlr.
 - Channels/Feishu: retry file-typed iOS video resource downloads as `media` after a Feishu/Lark HTTP 502 and preserve the original 502 when the fallback also fails. Fixes #49855; carries forward #50164 and #73986. Thanks @alex-xuweilong.
 - Providers/Amazon Bedrock: expose the full Claude Opus 4.7 thinking profile (`xhigh`, `adaptive`, and `max`) for Bedrock model refs, while keeping Opus/Sonnet 4.6 on adaptive-by-default, so `/think` menus and validation match the Anthropic transport behavior. Fixes #74701. Thanks @prasad-yashdeep, @sparkleHazard, @Sanjays2402, and @hclsys.
 - Plugins/tokenjuice: compile the bundled plugin against tokenjuice 0.7.0's published OpenClaw host types instead of a local compatibility shim, so package contract drift fails in OpenClaw validation before release. Thanks @vincentkoc.
diff --git a/src/plugins/bundled-runtime-deps-materialization.ts b/src/plugins/bundled-runtime-deps-materialization.ts
index c5bf92c35b0..4ec44a3f08d 100644
--- a/src/plugins/bundled-runtime-deps-materialization.ts
+++ b/src/plugins/bundled-runtime-deps-materialization.ts
@@ -52,27 +52,49 @@ function sameRuntimeDepSpecs(left: readonly string[], right: readonly string[]):
   );
 }
 
-function readInstalledRuntimeDepVersion(rootDir: string, depName: string): string | null {
+function readInstalledRuntimeDepPackage(
+  rootDir: string,
+  depName: string,
+): { packageDir: string; packageJson: JsonObject } | null {
   try {
-    const parsed = JSON.parse(
-      fs.readFileSync(resolveDependencySentinelAbsolutePath(rootDir, depName), "utf8"),
-    ) as unknown;
+    const packageJsonPath = resolveDependencySentinelAbsolutePath(rootDir, depName);
+    const parsed = JSON.parse(fs.readFileSync(packageJsonPath, "utf8")) as unknown;
     if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) {
       return null;
     }
-    const version = (parsed as JsonObject).version;
-    return typeof version === "string" && version.trim() ? version.trim() : null;
+    return { packageDir: path.dirname(packageJsonPath), packageJson: parsed as JsonObject };
   } catch {
     return null;
   }
 }
 
+function hasInstalledRuntimeDepEntryFiles(packageDir: string, packageJson: JsonObject): boolean {
+  const main = packageJson.main;
+  if (typeof main !== "string" || main.trim() === "") {
+    return true;
+  }
+  const mainPath = path.resolve(packageDir, main);
+  if (mainPath !== packageDir && !mainPath.startsWith(`${packageDir}${path.sep}`)) {
+    return false;
+  }
+  return fs.existsSync(mainPath);
+}
+
 export function isRuntimeDepSatisfied(
   rootDir: string,
   dep: { name: string; version: string },
 ): boolean {
-  const installedVersion = readInstalledRuntimeDepVersion(rootDir, dep.name);
-  return Boolean(installedVersion && satisfies(installedVersion, dep.version));
+  const installed = readInstalledRuntimeDepPackage(rootDir, dep.name);
+  if (!installed) {
+    return false;
+  }
+  const version = installed.packageJson.version;
+  return Boolean(
+    typeof version === "string" &&
+    version.trim() &&
+    satisfies(version.trim(), dep.version) &&
+    hasInstalledRuntimeDepEntryFiles(installed.packageDir, installed.packageJson),
+  );
 }
 
 export function isRuntimeDepSatisfiedInAnyRoot(
diff --git a/src/plugins/bundled-runtime-deps.test.ts b/src/plugins/bundled-runtime-deps.test.ts
index 9344d42dd3c..5985248173f 100644
--- a/src/plugins/bundled-runtime-deps.test.ts
+++ b/src/plugins/bundled-runtime-deps.test.ts
@@ -3198,6 +3198,58 @@ describe("ensureBundledPluginRuntimeDeps", () => {
     expect(installRoot).not.toBe(pluginRoot);
   });
 
+  it("repairs package-level mirrors when an installed package entry file is missing", () => {
+    const packageRoot = makeTempDir();
+    const stageDir = makeTempDir();
+    fs.writeFileSync(
+      path.join(packageRoot, "package.json"),
+      JSON.stringify({
+        name: "openclaw",
+        version: "2026.4.27",
+        dependencies: { ajv: "8.20.0" },
+        openclaw: {
+          bundle: {
+            mirroredRootRuntimeDependencies: ["ajv"],
+          },
+        },
+      }),
+    );
+    const pluginRoot = writeBundledPluginPackage({
+      packageRoot,
+      pluginId: "browser",
+      deps: {},
+      enabledByDefault: true,
+    });
+    const env = { OPENCLAW_PLUGIN_STAGE_DIR: stageDir };
+    const installRoot = resolveBundledRuntimeDependencyInstallRoot(pluginRoot, { env });
+    writeGeneratedRuntimeDepsManifest(installRoot, ["ajv@8.20.0"]);
+    const ajvRoot = path.join(installRoot, "node_modules", "ajv");
+    fs.mkdirSync(ajvRoot, { recursive: true });
+    fs.writeFileSync(
+      path.join(ajvRoot, "package.json"),
+      JSON.stringify({ name: "ajv", version: "8.20.0", main: "dist/ajv.js" }),
+    );
+
+    const calls: BundledRuntimeDepsInstallParams[] = [];
+    const result = ensureBundledPluginRuntimeDeps({
+      env,
+      pluginId: "browser",
+      pluginRoot,
+      installDeps: (params) => {
+        calls.push(params);
+      },
+    });
+
+    expect(result.installedSpecs).toEqual(["ajv@8.20.0"]);
+    expect(calls).toEqual([
+      {
+        installRoot,
+        missingSpecs: ["ajv@8.20.0"],
+        installSpecs: ["ajv@8.20.0"],
+      },
+    ]);
+  });
+
   it("mirrors sqlite-vec into the packaged default memory runtime deps", () => {
     const packageRoot = makeTempDir();
     fs.writeFileSync(