diff --git a/webui/src/web-components/sketch-monaco-view.test.ts b/webui/src/web-components/sketch-monaco-view.test.ts
index 7366153..538fbaf 100644
--- a/webui/src/web-components/sketch-monaco-view.test.ts
+++ b/webui/src/web-components/sketch-monaco-view.test.ts
@@ -60,3 +60,29 @@
   // The actual scroll preservation happens during runtime interactions
   expect(true).toBe(true); // Test passes if component mounts successfully with fixes
 });
+
+// Test keyboard shortcut functionality for comment submission
+test("Command+Enter and Ctrl+Enter keyboard shortcuts submit comments", async ({ mount }) => {
+  const component = await mount(CodeDiffEditor, {
+    props: {
+      originalCode: 'console.log("original");',
+      modifiedCode: 'console.log("modified");',
+    },
+  });  
+
+  await expect(component).toBeVisible();
+
+  // Test that the keyboard shortcut handler exists
+  const hasKeyboardHandler = await component.evaluate((node) => {
+    const monacoView = node as any;
+    
+    // Check if the handleCommentKeydown method exists
+    return typeof monacoView.handleCommentKeydown === 'function';
+  });
+
+  expect(hasKeyboardHandler).toBe(true);
+
+  // The actual keyboard event testing would require more complex setup
+  // with Monaco editor being fully loaded and comment UI being active.
+  // This test verifies the handler method is present.
+});
diff --git a/webui/src/web-components/sketch-monaco-view.ts b/webui/src/web-components/sketch-monaco-view.ts
index 9f3fa50..b74097a 100644
--- a/webui/src/web-components/sketch-monaco-view.ts
+++ b/webui/src/web-components/sketch-monaco-view.ts
@@ -373,6 +373,7 @@
                 placeholder="Type your comment here..."
                 .value="${this.commentText}"
                 @input="${this.handleCommentInput}"
+                @keydown="${this.handleCommentKeydown}"
               ></textarea>
               <div class="flex justify-end gap-2">
                 <button
@@ -403,6 +404,17 @@
   }
 
   /**
+   * Handle keyboard shortcuts in the comment textarea
+   */
+  private handleCommentKeydown(e: KeyboardEvent) {
+    // Check for Command+Enter (Mac) or Ctrl+Enter (other platforms)
+    if (e.key === 'Enter' && (e.metaKey || e.ctrlKey)) {
+      e.preventDefault();
+      this.submitComment();
+    }
+  }
+
+  /**
    * Get CSS class for selected text preview based on number of lines
    */
   private getPreviewCssClass(): string {