diff --git a/lib/rspace-header.ts b/lib/rspace-header.ts
index 27866069..eb0c40bf 100644
--- a/lib/rspace-header.ts
+++ b/lib/rspace-header.ts
@@ -550,7 +550,11 @@ export function showAuthModal(callbacks?: Partial<AuthModalCallbacks>): void {
     abortConditional();
     overlay.innerHTML = mode === 'signin' ? renderSignIn() : renderRegister();
     attachModalListeners();
-    if (mode === 'signin') startConditional();
+    if (mode === 'signin') {
+      startConditional();
+      // Auto-focus the passkey input so mobile shows autofill suggestions
+      setTimeout(() => (overlay.querySelector('#auth-signin-username') as HTMLInputElement)?.focus(), 100);
+    }
   }
 
   function abortConditional() {
@@ -628,9 +632,8 @@ export function showAuthModal(callbacks?: Partial<AuthModalCallbacks>): void {
           class="rspace-auth-modal__input"
           id="auth-signin-username"
           type="text"
-          placeholder="Select a saved passkey..."
+          placeholder="Tap to see saved passkeys..."
           autocomplete="username webauthn"
-          readonly
         />
         <div class="rspace-auth-modal__divider">or</div>
         <div class="rspace-auth-modal__actions">