diff --git a/crates/goose/src/config/extensions.rs b/crates/goose/src/config/extensions.rs
index 10e9d5dc67bc..0528553b2da5 100644
--- a/crates/goose/src/config/extensions.rs
+++ b/crates/goose/src/config/extensions.rs
@@ -54,22 +54,22 @@ fn get_extensions_map() -> IndexMap<String, ExtensionEntry> {
         }
     }
 
-    if !extensions_map.is_empty() {
-        for (name, def) in PLATFORM_EXTENSIONS.iter() {
-            if !extensions_map.contains_key(*name) {
-                extensions_map.insert(
-                    name.to_string(),
-                    ExtensionEntry {
-                        config: ExtensionConfig::Platform {
-                            name: def.name.to_string(),
-                            description: def.description.to_string(),
-                            bundled: Some(true),
-                            available_tools: Vec::new(),
-                        },
-                        enabled: def.default_enabled,
+    // Always inject platform extensions (code_execution, todo, skills, etc.)
+    // These are internal agent extensions that should always be available
+    for (name, def) in PLATFORM_EXTENSIONS.iter() {
+        if !extensions_map.contains_key(*name) {
+            extensions_map.insert(
+                name.to_string(),
+                ExtensionEntry {
+                    config: ExtensionConfig::Platform {
+                        name: def.name.to_string(),
+                        description: def.description.to_string(),
+                        bundled: Some(true),
+                        available_tools: Vec::new(),
                     },
-                );
-            }
+                    enabled: def.default_enabled,
+                },
+            );
         }
     }
     extensions_map
diff --git a/ui/desktop/src/components/ConfigContext.tsx b/ui/desktop/src/components/ConfigContext.tsx
index cee6a79b7c13..add93c0cc00a 100644
--- a/ui/desktop/src/components/ConfigContext.tsx
+++ b/ui/desktop/src/components/ConfigContext.tsx
@@ -10,6 +10,7 @@ import {
   providers,
   getProviderModels as apiGetProviderModels,
 } from '../api';
+import { syncBundledExtensions } from './settings/extensions';
 import type {
   ConfigResponse,
   UpsertConfigQuery,
@@ -218,7 +219,32 @@ export const ConfigProvider: React.FC<ConfigProviderProps> = ({ children }) => {
       // Load extensions
       try {
         const extensionsResponse = await apiGetExtensions();
-        setExtensionsList(extensionsResponse.data?.extensions || []);
+        let extensions = extensionsResponse.data?.extensions || [];
+
+        // If no bundled MCP extensions exist, seed config from bundled-extensions.json
+        // This ensures fresh installs get the default extensions (developer, computercontroller, etc.)
+        // Platform extensions (code_execution, todo, etc.) are handled by the backend
+        const hasBundledExtensions = extensions.some(
+          (ext) => ext.type === 'builtin' && 'bundled' in ext && ext.bundled
+        );
+
+        if (!hasBundledExtensions) {
+          console.log('No bundled extensions found, syncing from bundled-extensions.json');
+          const addExtensionForSync = async (
+            name: string,
+            config: ExtensionConfig,
+            enabled: boolean
+          ) => {
+            const query: ExtensionQuery = { name, config, enabled };
+            await apiAddExtension({ body: query });
+          };
+          await syncBundledExtensions(extensions, addExtensionForSync);
+          // Reload extensions after sync
+          const refreshedResponse = await apiGetExtensions();
+          extensions = refreshedResponse.data?.extensions || [];
+        }
+
+        setExtensionsList(extensions);
         setExtensionWarnings(extensionsResponse.data?.warnings || []);
       } catch (error) {
         console.error('Failed to load extensions:', error);