npm install --save-dev @sanity/prettier-config prettier

Then add it to your package.json to install it:

   },
+  "prettier": "@sanity/prettier-config",
   "dependencies": {

If you need to add more plugins, or extend the configuration, you'll need to create a .prettierrc.cjs, or prettier.config.cjs, file instead of using the prettier field in package.json:

// .prettierrc.cjs or prettier.config.cjs

const preset = require('@sanity/prettier-config')

module.exports = {
  ...preset,
  plugins: [...preset.plugins, 'prettier-plugin-tailwindcss'],
  experimentalTernaries: true,
}