```md
<!-- Button.stories.mdx -->

import { Meta, Story } from '@storybook/addon-docs';

import Button from './Button.svelte';

<!-- 👇 Creates specific argTypes and turns all stories into primary -->

<Meta title="Button"
  component={Button}
  argTypes={{
    backgroundColor: { 
      control: 'color',
    },
  }},
  args={{
    primary: true,
  }}/>

<!-- Remainder story implementation -->
```