diff --git a/package-lock.json b/package-lock.json
index 1eb742a..10839dd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11060,7 +11060,7 @@
         },
         "packages/extension": {
             "name": "@page-agent/ext",
-            "version": "0.1.0",
+            "version": "0.1.1",
             "hasInstallScript": true,
             "dependencies": {
                 "@page-agent/core": "1.1.0",
diff --git a/packages/extension/package.json b/packages/extension/package.json
index f2e79d0..c79ae8b 100644
--- a/packages/extension/package.json
+++ b/packages/extension/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@page-agent/ext",
     "private": true,
-    "version": "0.1.0",
+    "version": "0.1.1",
     "type": "module",
     "scripts": {
         "dev": "wxt",
diff --git a/packages/extension/src/entrypoints/main-world.ts b/packages/extension/src/entrypoints/main-world.ts
index f646a01..2612071 100644
--- a/packages/extension/src/entrypoints/main-world.ts
+++ b/packages/extension/src/entrypoints/main-world.ts
@@ -23,6 +23,10 @@ export default defineUnlistedScript(() => {
 		return _lastId
 	}
 
+	w.PAGE_AGENT_EXT_INSTALLED = true
+	w.PAGE_AGENT_EXT_VERSION = __EXT_VERSION__
+	w.PAGE_AGENT_EXT_CORE_VERSION = __CORE_VERSION__
+
 	w.execute = async (task: string, llmConfig: LLMConfig, hooks?: ExecuteHooks) => {
 		if (typeof task !== 'string') throw new Error('Task must be a string')
 		if (task.trim().length === 0) throw new Error('Task cannot be empty')
diff --git a/packages/extension/src/entrypoints/sidepanel/components/ConfigPanel.tsx b/packages/extension/src/entrypoints/sidepanel/components/ConfigPanel.tsx
index 22b4aaa..20bed01 100644
--- a/packages/extension/src/entrypoints/sidepanel/components/ConfigPanel.tsx
+++ b/packages/extension/src/entrypoints/sidepanel/components/ConfigPanel.tsx
@@ -7,9 +7,6 @@ import { DEMO_API_KEY, DEMO_BASE_URL, DEMO_MODEL } from '@/agent/constants'
 import { Button } from '@/components/ui/button'
 import { Input } from '@/components/ui/input'
 
-declare const __EXT_VERSION__: string
-declare const __CORE_VERSION__: string
-
 interface ConfigPanelProps {
 	config: LLMConfig | null
 	onSave: (config: LLMConfig) => Promise<void>
diff --git a/packages/extension/src/types/globals.d.ts b/packages/extension/src/types/globals.d.ts
new file mode 100644
index 0000000..c8effde
--- /dev/null
+++ b/packages/extension/src/types/globals.d.ts
@@ -0,0 +1,2 @@
+declare const __EXT_VERSION__: string
+declare const __CORE_VERSION__: string