--wip-- [skip ci]

packages/create-catalyst/src/commands/create.ts

@@ -15,6 +15,7 @@ import { Https } from '../utils/https';
 import { installDependencies } from '../utils/install-dependencies';
 import { login } from '../utils/login';
 import { parse } from '../utils/parse';
+import { patchYarn } from '../utils/patch-yarn';
 import { getPackageManager, packageManagerChoices } from '../utils/pm';
 import { spinner } from '../utils/spinner';
 import { writeEnv } from '../utils/write-env';
@@ -249,6 +250,8 @@ export const create = new Command('create')
 
     console.log(`\nUsing ${chalk.bold(packageManager)}\n`);
 
+    patchYarn({ projectDir });
+
     await installDependencies(projectDir, packageManager);
 
     await spinner(exec(`${packageManager} run --prefix ${projectDir} generate`), {

packages/create-catalyst/src/utils/patch-yarn.ts

@@ -0,0 +1,26 @@
+import { outputFileSync, readJsonSync, writeJsonSync } from 'fs-extra/esm';
+import set from 'lodash.set';
+import { join } from 'path';
+import * as z from 'zod';
+
+export const patchYarn = ({ projectDir }: { projectDir: string }) => {
+  const userAgent = process.env.npm_config_user_agent || '';
+  const usingYarnBerry = userAgent.includes('yarn/2') || userAgent.includes('yarn/3');
+
+  if (!usingYarnBerry) {
+    return;
+  }
+
+  const yarnrcYml = 'nodeLinker: node-modules\n';
+
+  outputFileSync(join(projectDir, '.yarnrc.yml'), yarnrcYml);
+
+  const packageJson = z
+    .object({})
+    .passthrough()
+    .parse(readJsonSync(join(projectDir, 'package.json')));
+
+  set(packageJson, 'devDependencies.eslint-plugin-prettier', '');
+
+  writeJsonSync(join(projectDir, 'package.json'), packageJson, { spaces: 2 });
+};