main.ts

The build-side configuration. Everything here runs in Node while Storybook boots or builds.

Minimal

.storybook/main.ts

ts

import type { StorybookConfig } from 'ember-storybook';

const config: StorybookConfig = {
  stories: ['../app/**/*.stories.g(j|t)s'],

  framework: 'ember-storybook',
};

export default config;

defineMain is a typed identity helper — same config, but the CSF Next entry point wants a default export.

Other Storybook Options

Everything else in StorybookConfig (docs, refs, staticDir, features, core) is plain Storybook — see the main.ts config reference.