diff --git a/ui/desktop/src/App.tsx b/ui/desktop/src/App.tsx
index 2b1e7381eb1e..33b00b141eea 100644
--- a/ui/desktop/src/App.tsx
+++ b/ui/desktop/src/App.tsx
@@ -45,11 +45,13 @@ const HubRouteWrapper = ({
   setChat,
   setPairChat,
   setIsGoosehintsModalOpen,
+  isExtensionsLoading,
 }: {
   chat: ChatType;
   setChat: (chat: ChatType) => void;
   setPairChat: (chat: ChatType) => void;
   setIsGoosehintsModalOpen: (isOpen: boolean) => void;
+  isExtensionsLoading: boolean;
 }) => {
   const navigate = useNavigate();
   const setView = createNavigationHandler(navigate);
@@ -62,6 +64,7 @@ const HubRouteWrapper = ({
       setPairChat={setPairChat}
       setView={setView}
       setIsGoosehintsModalOpen={setIsGoosehintsModalOpen}
+      isExtensionsLoading={isExtensionsLoading}
     />
   );
 };
@@ -400,6 +403,7 @@ export default function App() {
   const [agentWaitingMessage, setAgentWaitingMessage] = useState<string | null>(null);
   const [isLoadingSharedSession, setIsLoadingSharedSession] = useState(false);
   const [sharedSessionError, setSharedSessionError] = useState<string | null>(null);
+  const [isExtensionsLoading, setIsExtensionsLoading] = useState(false);
 
   // Add separate state for pair chat to maintain its own conversation
   const [pairChat, setPairChat] = useState<ChatType>({
@@ -482,6 +486,7 @@ export default function App() {
         addExtension,
         setPairChat,
         setMessage: setAgentWaitingMessage,
+        setIsExtensionsLoading,
         provider: provider as string,
         model: model as string,
       });
@@ -802,12 +807,13 @@ export default function App() {
                 <Route
                   index
                   element={
-                    <ProviderGuard>
+                    <ProviderGuard setIsExtensionsLoading={setIsExtensionsLoading}>
                       <HubRouteWrapper
                         chat={chat}
                         setChat={setChat}
                         setPairChat={setPairChat}
                         setIsGoosehintsModalOpen={setIsGoosehintsModalOpen}
+                        isExtensionsLoading={isExtensionsLoading}
                       />
                     </ProviderGuard>
                   }
@@ -815,7 +821,7 @@ export default function App() {
                 <Route
                   path="pair"
                   element={
-                    <ProviderGuard>
+                    <ProviderGuard setIsExtensionsLoading={setIsExtensionsLoading}>
                       <ChatProvider
                         chat={pairChat}
                         setChat={setPairChat}
@@ -836,7 +842,7 @@ export default function App() {
                 <Route
                   path="settings"
                   element={
-                    <ProviderGuard>
+                    <ProviderGuard setIsExtensionsLoading={setIsExtensionsLoading}>
                       <SettingsRoute />
                     </ProviderGuard>
                   }
@@ -844,7 +850,7 @@ export default function App() {
                 <Route
                   path="extensions"
                   element={
-                    <ProviderGuard>
+                    <ProviderGuard setIsExtensionsLoading={setIsExtensionsLoading}>
                       <ExtensionsRoute />
                     </ProviderGuard>
                   }
@@ -852,7 +858,7 @@ export default function App() {
                 <Route
                   path="sessions"
                   element={
-                    <ProviderGuard>
+                    <ProviderGuard setIsExtensionsLoading={setIsExtensionsLoading}>
                       <SessionsRoute />
                     </ProviderGuard>
                   }
@@ -860,7 +866,7 @@ export default function App() {
                 <Route
                   path="schedules"
                   element={
-                    <ProviderGuard>
+                    <ProviderGuard setIsExtensionsLoading={setIsExtensionsLoading}>
                       <SchedulesRoute />
                     </ProviderGuard>
                   }
@@ -868,7 +874,7 @@ export default function App() {
                 <Route
                   path="recipes"
                   element={
-                    <ProviderGuard>
+                    <ProviderGuard setIsExtensionsLoading={setIsExtensionsLoading}>
                       <RecipesRoute />
                     </ProviderGuard>
                   }
@@ -876,7 +882,7 @@ export default function App() {
                 <Route
                   path="recipe-editor"
                   element={
-                    <ProviderGuard>
+                    <ProviderGuard setIsExtensionsLoading={setIsExtensionsLoading}>
                       <RecipeEditorRoute />
                     </ProviderGuard>
                   }
@@ -884,7 +890,7 @@ export default function App() {
                 <Route
                   path="shared-session"
                   element={
-                    <ProviderGuard>
+                    <ProviderGuard setIsExtensionsLoading={setIsExtensionsLoading}>
                       <SharedSessionRouteWrapper
                         isLoadingSharedSession={isLoadingSharedSession}
                         setIsLoadingSharedSession={setIsLoadingSharedSession}
@@ -896,7 +902,7 @@ export default function App() {
                 <Route
                   path="permission"
                   element={
-                    <ProviderGuard>
+                    <ProviderGuard setIsExtensionsLoading={setIsExtensionsLoading}>
                       <PermissionRoute />
                     </ProviderGuard>
                   }
diff --git a/ui/desktop/src/components/ChatInput.tsx b/ui/desktop/src/components/ChatInput.tsx
index dba2f0080046..16a9db65f805 100644
--- a/ui/desktop/src/components/ChatInput.tsx
+++ b/ui/desktop/src/components/ChatInput.tsx
@@ -86,6 +86,7 @@ interface ChatInputProps {
   autoSubmit: boolean;
   setAncestorMessages?: (messages: Message[]) => void;
   append?: (message: Message) => void;
+  isExtensionsLoading?: boolean;
 }
 
 export default function ChatInput({
@@ -111,6 +112,7 @@ export default function ChatInput({
   autoSubmit = false,
   append,
   setAncestorMessages,
+  isExtensionsLoading = false,
 }: ChatInputProps) {
   const [_value, setValue] = useState(initialValue);
   const [displayValue, setDisplayValue] = useState(initialValue); // For immediate visual feedback
@@ -1125,6 +1127,25 @@ export default function ChatInput({
   const isAnyImageLoading = pastedImages.some((img) => img.isLoading);
   const isAnyDroppedFileLoading = allDroppedFiles.some((file) => file.isLoading);
 
+  const isSubmitButtonDisabled =
+    !hasSubmittableContent ||
+    isAnyImageLoading ||
+    isAnyDroppedFileLoading ||
+    isRecording ||
+    isTranscribing ||
+    isCompacting ||
+    !agentIsReady ||
+    isExtensionsLoading;
+
+  const isUserInputDisabled =
+    isAnyImageLoading ||
+    isAnyDroppedFileLoading ||
+    isRecording ||
+    isTranscribing ||
+    isCompacting ||
+    !agentIsReady ||
+    isExtensionsLoading;
+
   // Queue management functions - no storage persistence, only in-memory
   const handleRemoveQueuedMessage = (messageId: string) => {
     setQueuedMessages((prev) => prev.filter((msg) => msg.id !== messageId));
@@ -1239,6 +1260,7 @@ export default function ChatInput({
             onBlur={() => setIsFocused(false)}
             ref={textAreaRef}
             rows={1}
+            disabled={isUserInputDisabled}
             style={{
               maxHeight: `${maxHeight}px`,
               overflowY: 'auto',
@@ -1349,23 +1371,9 @@ export default function ChatInput({
                     size="sm"
                     shape="round"
                     variant="outline"
-                    disabled={
-                      !hasSubmittableContent ||
-                      isAnyImageLoading ||
-                      isAnyDroppedFileLoading ||
-                      isRecording ||
-                      isTranscribing ||
-                      isCompacting ||
-                      !agentIsReady
-                    }
+                    disabled={isSubmitButtonDisabled}
                     className={`rounded-full px-10 py-2 flex items-center gap-2 ${
-                      !hasSubmittableContent ||
-                      isAnyImageLoading ||
-                      isAnyDroppedFileLoading ||
-                      isRecording ||
-                      isTranscribing ||
-                      isCompacting ||
-                      !agentIsReady
+                      isSubmitButtonDisabled
                         ? 'bg-slate-600 text-white cursor-not-allowed opacity-50 border-slate-600'
                         : 'bg-slate-600 text-white hover:bg-slate-700 border-slate-600 hover:cursor-pointer'
                     }`}
@@ -1377,17 +1385,19 @@ export default function ChatInput({
               </TooltipTrigger>
               <TooltipContent>
                 <p>
-                  {isCompacting
-                    ? 'Compacting conversation...'
-                    : isAnyImageLoading
-                      ? 'Waiting for images to save...'
-                      : isAnyDroppedFileLoading
-                        ? 'Processing dropped files...'
-                        : isRecording
-                          ? 'Recording...'
-                          : isTranscribing
-                            ? 'Transcribing...'
-                            : (chatContext?.agentWaitingMessage ?? 'Send')}
+                  {isExtensionsLoading
+                    ? 'Loading extensions...'
+                    : isCompacting
+                      ? 'Compacting conversation...'
+                      : isAnyImageLoading
+                        ? 'Waiting for images to save...'
+                        : isAnyDroppedFileLoading
+                          ? 'Processing dropped files...'
+                          : isRecording
+                            ? 'Recording...'
+                            : isTranscribing
+                              ? 'Transcribing...'
+                              : (chatContext?.agentWaitingMessage ?? 'Send')}
                 </p>
               </TooltipContent>
             </Tooltip>
diff --git a/ui/desktop/src/components/OllamaSetup.tsx b/ui/desktop/src/components/OllamaSetup.tsx
index 2d104d0f9632..9f54f0b1353e 100644
--- a/ui/desktop/src/components/OllamaSetup.tsx
+++ b/ui/desktop/src/components/OllamaSetup.tsx
@@ -16,9 +16,10 @@ import { Ollama } from './icons';
 interface OllamaSetupProps {
   onSuccess: () => void;
   onCancel: () => void;
+  setIsExtensionsLoading?: (loading: boolean) => void;
 }
 
-export function OllamaSetup({ onSuccess, onCancel }: OllamaSetupProps) {
+export function OllamaSetup({ onSuccess, onCancel, setIsExtensionsLoading }: OllamaSetupProps) {
   const { addExtension, getExtensions, upsert } = useConfig();
   const [isChecking, setIsChecking] = useState(true);
   const [ollamaDetected, setOllamaDetected] = useState(false);
@@ -113,6 +114,7 @@ export function OllamaSetup({ onSuccess, onCancel }: OllamaSetupProps) {
       await initializeSystem('ollama', getPreferredModel(), {
         getExtensions,
         addExtension,
+        setIsExtensionsLoading,
       });
 
       toastService.success({
@@ -157,7 +159,9 @@ export function OllamaSetup({ onSuccess, onCancel }: OllamaSetupProps) {
       {ollamaDetected ? (
         <div className="space-y-4">
           <div className="flex items-start mb-16">
-            <span className="inline-block px-2 py-1 text-xs font-medium bg-green-600 text-white rounded-full">Ollama is detected and running</span>
+            <span className="inline-block px-2 py-1 text-xs font-medium bg-green-600 text-white rounded-full">
+              Ollama is detected and running
+            </span>
           </div>
 
           {modelStatus === 'checking' ? (
@@ -185,14 +189,10 @@ export function OllamaSetup({ onSuccess, onCancel }: OllamaSetupProps) {
           ) : modelStatus === 'downloading' ? (
             <div className="space-y-4">
               <div className="bg-background-info/10 border border-border-info rounded-lg p-4">
-                <p className="text-text-info text-sm">
-                  Downloading {getPreferredModel()}...
-                </p>
+                <p className="text-text-info text-sm">Downloading {getPreferredModel()}...</p>
                 {downloadProgress && (
                   <>
-                    <p className="text-text-muted text-xs mt-2">
-                      {downloadProgress.status}
-                    </p>
+                    <p className="text-text-muted text-xs mt-2">{downloadProgress.status}</p>
                     {downloadProgress.total && downloadProgress.completed && (
                       <div className="mt-3">
                         <div className="bg-background-muted rounded-full h-2 overflow-hidden">
@@ -225,7 +225,9 @@ export function OllamaSetup({ onSuccess, onCancel }: OllamaSetupProps) {
       ) : (
         <div className="space-y-4">
           <div className="flex items-start mb-16">
-            <span className="inline-block px-2 py-1 text-xs font-medium bg-orange-600 text-white rounded-full">Ollama is not detected on your system</span>
+            <span className="inline-block px-2 py-1 text-xs font-medium bg-orange-600 text-white rounded-full">
+              Ollama is not detected on your system
+            </span>
           </div>
 
           {isPolling ? (
diff --git a/ui/desktop/src/components/ProviderGuard.tsx b/ui/desktop/src/components/ProviderGuard.tsx
index 89fb8e5ce13d..fc821c15eff6 100644
--- a/ui/desktop/src/components/ProviderGuard.tsx
+++ b/ui/desktop/src/components/ProviderGuard.tsx
@@ -14,9 +14,10 @@ import { OpenRouter } from './icons';
 
 interface ProviderGuardProps {
   children: React.ReactNode;
+  setIsExtensionsLoading?: (loading: boolean) => void;
 }
 
-export default function ProviderGuard({ children }: ProviderGuardProps) {
+export default function ProviderGuard({ children, setIsExtensionsLoading }: ProviderGuardProps) {
   const { read, getExtensions, addExtension } = useConfig();
   const navigate = useNavigate();
   const [isChecking, setIsChecking] = useState(true);
@@ -72,6 +73,7 @@ export default function ProviderGuard({ children }: ProviderGuardProps) {
           await initializeSystem(provider as string, model as string, {
             getExtensions,
             addExtension,
+            setIsExtensionsLoading,
           });
 
           toastService.configure({ silent: false });
@@ -138,6 +140,7 @@ export default function ProviderGuard({ children }: ProviderGuardProps) {
           await initializeSystem(provider as string, model as string, {
             getExtensions,
             addExtension,
+            setIsExtensionsLoading,
           });
 
           toastService.configure({ silent: false });
@@ -267,6 +270,7 @@ export default function ProviderGuard({ children }: ProviderGuardProps) {
               setShowOllamaSetup(false);
               setShowFirstTimeSetup(true);
             }}
+            setIsExtensionsLoading={setIsExtensionsLoading}
           />
         </div>
       </div>
diff --git a/ui/desktop/src/components/hub.tsx b/ui/desktop/src/components/hub.tsx
index 732278e244f9..116ddf8b3b94 100644
--- a/ui/desktop/src/components/hub.tsx
+++ b/ui/desktop/src/components/hub.tsx
@@ -36,6 +36,7 @@ export default function Hub({
   setPairChat,
   setView,
   setIsGoosehintsModalOpen,
+  isExtensionsLoading,
 }: {
   readyForAutoUserPrompt: boolean;
   chat: ChatType;
@@ -43,6 +44,7 @@ export default function Hub({
   setPairChat: (chat: ChatType) => void;
   setView: (view: View, viewOptions?: ViewOptions) => void;
   setIsGoosehintsModalOpen: (isOpen: boolean) => void;
+  isExtensionsLoading: boolean;
 }) {
   // Handle chat input submission - create new chat and navigate to pair
   const handleSubmit = (e: React.FormEvent) => {
@@ -101,6 +103,7 @@ export default function Hub({
           disableAnimation={false}
           sessionCosts={undefined}
           setIsGoosehintsModalOpen={setIsGoosehintsModalOpen}
+          isExtensionsLoading={isExtensionsLoading}
         />
       </div>
     </ContextManagerProvider>
diff --git a/ui/desktop/src/components/settings/providers/ProviderSettingsPage.tsx b/ui/desktop/src/components/settings/providers/ProviderSettingsPage.tsx
index dd2b9c81036b..0e5b52672866 100644
--- a/ui/desktop/src/components/settings/providers/ProviderSettingsPage.tsx
+++ b/ui/desktop/src/components/settings/providers/ProviderSettingsPage.tsx
@@ -10,9 +10,14 @@ import { toastService } from '../../../toasts';
 interface ProviderSettingsProps {
   onClose: () => void;
   isOnboarding: boolean;
+  setIsExtensionsLoading?: (loading: boolean) => void;
 }
 
-export default function ProviderSettings({ onClose, isOnboarding }: ProviderSettingsProps) {
+export default function ProviderSettings({
+  onClose,
+  isOnboarding,
+  setIsExtensionsLoading,
+}: ProviderSettingsProps) {
   const { getProviders, upsert, getExtensions, addExtension } = useConfig();
   const [loading, setLoading] = useState(true);
   const [providers, setProviders] = useState<ProviderDetails[]>([]);
@@ -71,6 +76,7 @@ export default function ProviderSettings({ onClose, isOnboarding }: ProviderSett
         await initializeSystem(provider.name, model, {
           getExtensions,
           addExtension,
+          setIsExtensionsLoading,
         });
 
         toastService.configure({ silent: false });
@@ -92,7 +98,7 @@ export default function ProviderSettings({ onClose, isOnboarding }: ProviderSett
         });
       }
     },
-    [onClose, upsert, getExtensions, addExtension]
+    [onClose, upsert, getExtensions, addExtension, setIsExtensionsLoading]
   );
 
   return (
diff --git a/ui/desktop/src/utils/appInitialization.ts b/ui/desktop/src/utils/appInitialization.ts
index 054142036cac..f311d5886fe9 100644
--- a/ui/desktop/src/utils/appInitialization.ts
+++ b/ui/desktop/src/utils/appInitialization.ts
@@ -15,6 +15,7 @@ interface InitializationDependencies {
   addExtension?: (name: string, config: ExtensionConfig, enabled: boolean) => Promise<void>;
   setPairChat: (chat: ChatType | ((prev: ChatType) => ChatType)) => void;
   setMessage: (message: string | null) => void;
+  setIsExtensionsLoading: (loading: boolean) => void;
   provider: string;
   model: string;
 }
@@ -24,6 +25,7 @@ export const initializeApp = async ({
   addExtension,
   setPairChat,
   setMessage,
+  setIsExtensionsLoading,
   provider,
   model,
 }: InitializationDependencies) => {
@@ -36,7 +38,13 @@ export const initializeApp = async ({
 
   if (resumeSessionId) {
     console.log('Session resume detected, letting useChat hook handle navigation');
-    await initializeForSessionResume({ getExtensions, addExtension, provider, model });
+    await initializeForSessionResume({
+      getExtensions,
+      addExtension,
+      setIsExtensionsLoading,
+      provider,
+      model,
+    });
     return;
   }
 
@@ -47,6 +55,7 @@ export const initializeApp = async ({
       getExtensions,
       addExtension,
       setPairChat,
+      setIsExtensionsLoading,
       provider,
       model,
     });
@@ -82,6 +91,7 @@ export const initializeApp = async ({
         initializeSystem(provider, model, {
           getExtensions,
           addExtension,
+          setIsExtensionsLoading,
         }),
       ];
 
@@ -115,15 +125,20 @@ export const initializeApp = async ({
 const initializeForSessionResume = async ({
   getExtensions,
   addExtension,
+  setIsExtensionsLoading,
   provider,
   model,
-}: Pick<InitializationDependencies, 'getExtensions' | 'addExtension' | 'provider' | 'model'>) => {
+}: Pick<
+  InitializationDependencies,
+  'getExtensions' | 'addExtension' | 'setIsExtensionsLoading' | 'provider' | 'model'
+>) => {
   await initConfig();
   await readAllConfig({ throwOnError: true });
 
   await initializeSystem(provider, model, {
     getExtensions,
     addExtension,
+    setIsExtensionsLoading,
   });
 };
 
@@ -132,11 +147,12 @@ const initializeForRecipe = async ({
   getExtensions,
   addExtension,
   setPairChat,
+  setIsExtensionsLoading,
   provider,
   model,
 }: Pick<
   InitializationDependencies,
-  'getExtensions' | 'addExtension' | 'setPairChat' | 'provider' | 'model'
+  'getExtensions' | 'addExtension' | 'setPairChat' | 'setIsExtensionsLoading' | 'provider' | 'model'
 > & {
   recipeConfig: Recipe;
 }) => {
@@ -146,6 +162,7 @@ const initializeForRecipe = async ({
   await initializeSystem(provider, model, {
     getExtensions,
     addExtension,
+    setIsExtensionsLoading,
   });
 
   setPairChat((prevChat) => ({
diff --git a/ui/desktop/src/utils/providerUtils.ts b/ui/desktop/src/utils/providerUtils.ts
index cdcbac182c28..e86eb220afc5 100644
--- a/ui/desktop/src/utils/providerUtils.ts
+++ b/ui/desktop/src/utils/providerUtils.ts
@@ -115,6 +115,7 @@ export const initializeSystem = async (
   options?: {
     getExtensions?: (b: boolean) => Promise<FixedExtensionEntry[]>;
     addExtension?: (name: string, config: ExtensionConfig, enabled: boolean) => Promise<void>;
+    setIsExtensionsLoading?: (loading: boolean) => void;
   }
 ) => {
   try {
@@ -182,6 +183,8 @@ export const initializeSystem = async (
     // Add enabled extensions to agent in parallel
     const enabledExtensions = refreshedExtensions.filter((ext) => ext.enabled);
 
+    options?.setIsExtensionsLoading?.(true);
+
     const extensionLoadingPromises = enabledExtensions.map(async (extensionEntry) => {
       const extensionConfig = extractExtensionConfig(extensionEntry);
       const extensionName = extensionConfig.name;
@@ -198,8 +201,10 @@ export const initializeSystem = async (
     });
 
     await Promise.allSettled(extensionLoadingPromises);
+    options?.setIsExtensionsLoading?.(false);
   } catch (error) {
     console.error('Failed to initialize agent:', error);
+    options?.setIsExtensionsLoading?.(false);
     throw error;
   }
 };