Expose Flutter debug toolbar extension group

Author: mdddj

resources/META-INF/plugin.xml

@@ -74,6 +74,9 @@
       <add-to-group anchor="before" group-id="ToolbarRunGroup" relative-to-action="RunConfiguration"/>
     </group>
 
+    <!-- Allows dependent plugins to contribute inline actions to Flutter run/debug content toolbars. -->
+    <group id="Flutter.DebugProcess.TopToolbar" popup="false"/>
+
     <!--suppress PluginXmlCapitalization -->
     <group id="FlutterToolsActionGroup" class="io.flutter.actions.FlutterToolsActionGroup" popup="true"
            text="Flutter" description="Flutter Tools" icon="FlutterIcons.Flutter">

src/io/flutter/run/FlutterDebugProcess.java

@@ -111,6 +111,7 @@ public void registerAdditionalActions(@NotNull final DefaultActionGroup leftTool
     topToolbar.addAction(new RestartFlutterApp(app, canReload));
     topToolbar.addSeparator();
     topToolbar.addAction(new OpenDevToolsAction(app, debugUrlAvailable));
+    FlutterDebugProcessActions.addTopToolbarExtensionActions(topToolbar);
 
     settings.addAction(new ReloadAllFlutterApps(app, canReload));
     settings.addAction(new RestartAllFlutterApps(app, canReload));

src/io/flutter/run/FlutterDebugProcessActions.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2026 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+package io.flutter.run;
+
+import com.intellij.openapi.actionSystem.ActionGroup;
+import com.intellij.openapi.actionSystem.ActionManager;
+import com.intellij.openapi.actionSystem.AnAction;
+import com.intellij.openapi.actionSystem.DefaultActionGroup;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Shared action groups for Flutter-specific run and debug toolbars.
+ */
+public final class FlutterDebugProcessActions {
+  /**
+   * Third-party plugins can contribute inline toolbar actions with:
+   * {@code <add-to-group group-id="Flutter.DebugProcess.TopToolbar" anchor="last" />}.
+   */
+  public static final @NotNull String TOP_TOOLBAR_EXTENSION_GROUP_ID = "Flutter.DebugProcess.TopToolbar";
+
+  private FlutterDebugProcessActions() {
+  }
+
+  public static void addTopToolbarExtensionActions(@NotNull DefaultActionGroup topToolbar) {
+    final AnAction action = ActionManager.getInstance().getAction(TOP_TOOLBAR_EXTENSION_GROUP_ID);
+    if (!(action instanceof ActionGroup actionGroup) || isEmpty(actionGroup)) {
+      return;
+    }
+
+    topToolbar.addSeparator();
+    topToolbar.addAction(action);
+  }
+
+  private static boolean isEmpty(@NotNull ActionGroup actionGroup) {
+    if (actionGroup instanceof DefaultActionGroup defaultActionGroup) {
+      return defaultActionGroup.getChildActionsOrStubs().length == 0;
+    }
+
+    return actionGroup.getChildren(null).length == 0;
+  }
+}

src/io/flutter/run/bazelTest/BazelTestDebugProcess.java

@@ -11,6 +11,7 @@
 import com.intellij.xdebugger.XDebugSession;
 import com.jetbrains.lang.dart.util.DartUrlResolver;
 import io.flutter.ObservatoryConnector;
+import io.flutter.run.FlutterDebugProcessActions;
 import io.flutter.run.FlutterPopFrameAction;
 import io.flutter.run.OpenDevToolsAction;
 import io.flutter.vmService.DartVmServiceDebugProcess;
@@ -40,6 +41,7 @@ public void registerAdditionalActions(@NotNull DefaultActionGroup leftToolbar,
     topToolbar.addSeparator();
     topToolbar.addAction(new FlutterPopFrameAction());
     topToolbar.addAction(new OpenDevToolsAction(connector, this::isActive));
+    FlutterDebugProcessActions.addTopToolbarExtensionActions(topToolbar);
   }
 
   private boolean isActive() {

src/io/flutter/run/test/TestDebugProcess.java

@@ -11,6 +11,7 @@
 import com.intellij.xdebugger.XDebugSession;
 import com.jetbrains.lang.dart.util.DartUrlResolver;
 import io.flutter.ObservatoryConnector;
+import io.flutter.run.FlutterDebugProcessActions;
 import io.flutter.run.FlutterPopFrameAction;
 import io.flutter.run.OpenDevToolsAction;
 import io.flutter.vmService.DartVmServiceDebugProcess;
@@ -40,6 +41,7 @@ public void registerAdditionalActions(@NotNull DefaultActionGroup leftToolbar,
     topToolbar.addSeparator();
     topToolbar.addAction(new FlutterPopFrameAction());
     topToolbar.addAction(new OpenDevToolsAction(connector, this::isActive));
+    FlutterDebugProcessActions.addTopToolbarExtensionActions(topToolbar);
   }
 
   private boolean isActive() {