@netlify/build/lib/plugins/internal.js

Netlify build module

const NETLIFY_MAINTAINED_PLUGINS = new Set([
    'netlify_plugin_gatsby_cache',
    'netlify_plugin_sitemap',
    'netlify_plugin_debug_cache',
    'netlify_plugin_is_website_vulnerable',
    'netlify_plugin_lighthouse',
    'netlify_plugin_nextjs',
    'netlify_plugin_gatsby',
]);
export const isNetlifyMaintainedPlugin = (pluginPackage) => NETLIFY_MAINTAINED_PLUGINS.has(pluginPackage);