diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/embed/EmbeddedSurfaceController.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/embed/EmbeddedSurfaceController.kt
index bab6cdd01c..dd0225649e 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/embed/EmbeddedSurfaceController.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/embed/EmbeddedSurfaceController.kt
@@ -39,10 +39,14 @@ interface EmbeddedSurfaceController {
     fun attachView(view: SandboxedSdkView)
 
     /** The session became the visible tab. */
-    fun onShown() {}
+    fun onShown() {
+        // Optional hook: default no-op. Controllers that don't pause/resume applet JS need no action.
+    }
 
     /** The session is warm but off-screen; a controller may pause its applet here. */
-    fun onHidden() {}
+    fun onHidden() {
+        // Optional hook: default no-op. Controllers that don't pause/resume applet JS need no action.
+    }
 
     /** Permanently close the session (unbind the service); used on eviction. */
     fun teardown()
@@ -59,5 +63,7 @@ interface EmbeddedSurfaceController {
     var onLoadStatusChanged: ((EmbeddedLoadStatus) -> Unit)?
 
     /** Re-attempt the load from scratch (the overlay's Retry); default no-op. */
-    fun retry() {}
+    fun retry() {
+        // Default no-op: only controllers that report a real load state (and thus can fail) override this.
+    }
 }
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/embed/RemoteImeView.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/embed/RemoteImeView.kt
index 24adb7b84e..19fdac7055 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/embed/RemoteImeView.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/embed/RemoteImeView.kt
@@ -85,14 +85,18 @@ class RemoteImeView(
                     start: Int,
                     count: Int,
                     after: Int,
-                ) {}
+                ) {
+                    // No-op: TextWatcher requires this override, but only afterTextChanged drives our flush.
+                }
 
                 override fun onTextChanged(
                     s: CharSequence?,
                     start: Int,
                     before: Int,
                     count: Int,
-                ) {}
+                ) {
+                    // No-op: TextWatcher requires this override, but only afterTextChanged drives our flush.
+                }
 
                 override fun afterTextChanged(s: Editable?) {
                     if (!applyingRemote) onEdited?.invoke()
diff --git a/nappletHost/src/main/kotlin/com/vitorpamplona/amethyst/napplethost/NappletBrowserUiAdapter.kt b/nappletHost/src/main/kotlin/com/vitorpamplona/amethyst/napplethost/NappletBrowserUiAdapter.kt
index f1b3c43578..bbb2ed68fa 100644
--- a/nappletHost/src/main/kotlin/com/vitorpamplona/amethyst/napplethost/NappletBrowserUiAdapter.kt
+++ b/nappletHost/src/main/kotlin/com/vitorpamplona/amethyst/napplethost/NappletBrowserUiAdapter.kt
@@ -81,7 +81,9 @@ private class BrowserSession(
 
     override val signalOptions: Set<String> = emptySet()
 
-    override fun notifySessionRendered(supportedSignalOptions: Set<String>) {}
+    override fun notifySessionRendered(supportedSignalOptions: Set<String>) {
+        // No-op: signalOptions is empty, so there are no supported signals to report back on.
+    }
 
     override fun notifyResized(
         width: Int,
@@ -91,11 +93,17 @@ private class BrowserSession(
         webView.requestLayout()
     }
 
-    override fun notifyZOrderChanged(isZOrderOnTop: Boolean) {}
+    override fun notifyZOrderChanged(isZOrderOnTop: Boolean) {
+        // No-op: the WebView's z-order within the SurfaceControlViewHost surface is fixed.
+    }
 
-    override fun notifyConfigurationChanged(configuration: Configuration) {}
+    override fun notifyConfigurationChanged(configuration: Configuration) {
+        // No-op: the WebView handles configuration changes itself; the session needs no extra action.
+    }
 
-    override fun notifyUiChanged(uiContainerInfo: Bundle) {}
+    override fun notifyUiChanged(uiContainerInfo: Bundle) {
+        // No-op: no host-side reaction is needed to UI-container geometry updates.
+    }
 
     override fun close() {
         // The library may call close() off the main thread; WebView.destroy() (and the tabs mutation)
diff --git a/nappletHost/src/main/kotlin/com/vitorpamplona/amethyst/napplethost/NappletHostUiAdapter.kt b/nappletHost/src/main/kotlin/com/vitorpamplona/amethyst/napplethost/NappletHostUiAdapter.kt
index 4297bdab68..1fe4c18942 100644
--- a/nappletHost/src/main/kotlin/com/vitorpamplona/amethyst/napplethost/NappletHostUiAdapter.kt
+++ b/nappletHost/src/main/kotlin/com/vitorpamplona/amethyst/napplethost/NappletHostUiAdapter.kt
@@ -82,7 +82,9 @@ private class HostSession(
 
     override val signalOptions: Set<String> = emptySet()
 
-    override fun notifySessionRendered(supportedSignalOptions: Set<String>) {}
+    override fun notifySessionRendered(supportedSignalOptions: Set<String>) {
+        // No-op: signalOptions is empty, so there are no supported signals to report back on.
+    }
 
     override fun notifyResized(
         width: Int,
@@ -92,11 +94,17 @@ private class HostSession(
         webView.requestLayout()
     }
 
-    override fun notifyZOrderChanged(isZOrderOnTop: Boolean) {}
+    override fun notifyZOrderChanged(isZOrderOnTop: Boolean) {
+        // No-op: the WebView's z-order within the SurfaceControlViewHost surface is fixed.
+    }
 
-    override fun notifyConfigurationChanged(configuration: Configuration) {}
+    override fun notifyConfigurationChanged(configuration: Configuration) {
+        // No-op: the WebView handles configuration changes itself; the session needs no extra action.
+    }
 
-    override fun notifyUiChanged(uiContainerInfo: Bundle) {}
+    override fun notifyUiChanged(uiContainerInfo: Bundle) {
+        // No-op: no host-side reaction is needed to UI-container geometry updates.
+    }
 
     override fun close() {
         // The library may call close() off the main thread; WebView.destroy() (and the tabs mutation)