allow omitting --quiet flag in heft-storybook-plugin without requiring --verbose

common/changes/@rushstack/heft-storybook-plugin/main_2026-03-04-03-22.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@rushstack/heft-storybook-plugin",
+      "comment": "add option to control whether to pass --quiet flag",
+      "type": "minor"
+    }
+  ],
+  "packageName": "@rushstack/heft-storybook-plugin"
+}

heft-plugins/heft-storybook-plugin/src/StorybookPlugin.ts

@@ -158,6 +158,12 @@ export interface IStorybookPluginOptions {
    * Specifies whether to capture the webpack stats for the storybook build by adding the `--webpack-stats-json` CLI flag.
    */
   captureWebpackStats?: boolean;
+  /**
+   * Specifies whether to run storybook in quiet mode (--quiet).
+   *
+   * @defaultValue `true`
+   */
+  quiet?: boolean;
 }
 
 interface IRunStorybookOptions extends IPrepareStorybookOptions {
@@ -487,7 +493,7 @@ export default class StorybookPlugin implements IHeftTaskPlugin<IStorybookPlugin
       storybookArgs.push('--webpack-stats-json');
     }
 
-    if (!verbose) {
+    if (options.quiet !== false && !verbose) {
       storybookArgs.push('--quiet');
     }
 

heft-plugins/heft-storybook-plugin/src/schemas/storybook.schema.json

@@ -37,6 +37,11 @@
       "title": "Specifies whether to capture the webpack stats for storybook build.",
       "description": "If this is true, then it will capture the webpack stats for storybook build. Defaults to false.",
       "type": "boolean"
+    },
+    "quiet": {
+      "title": "Specifies whether to run storybook in quiet mode (--quiet).",
+      "description": "If this is true, then it will run storybook in quiet mode. Defaults to true.",
+      "type": "boolean"
     }
   }
 }