export default {
  // other rules...
  parserOptions: {
    ecmaVersion: 'latest',
    sourceType: 'module',
    project: ['./tsconfig.json', './tsconfig.node.json'],
    tsconfigRootDir: __dirname,
  },
}

Replace plugin:@typescript-eslint/recommended to plugin:@typescript-eslint/recommended-type-checked or plugin:@typescript-eslint/strict-type-checked
Optionally add plugin:@typescript-eslint/stylistic-type-checked
Install eslint-plugin-react and add plugin:react/recommended & plugin:react/jsx-runtime to the extends list

Translations

Translation files live in src/i18n/translations. en.json is the source of truth, and every other <locale>.json file is translated from it.

Find missing translations

yarn i18n:sync missing

Prints the number of strings in en.json that each locale is missing. Plural keys are expanded to the plural forms each locale uses, as defined in src/i18n/plural-config.json.

Pass --output to also write the missing strings to a JSON file:

yarn i18n:sync missing --output missing.json

The file is keyed by locale. Each entry has the number of missing strings (count), the locale's plural forms (pluralForms), and the missing keys nested as in en.json with their English text as values (missing).

Apply translations

yarn i18n:sync apply --input <directory>

Merges translated strings into the locale files. The directory must contain JSON files named <locale>.json, or <locale>.<anything>.json to split a locale across several files (for example, de.part-1.json). Each file uses the same nested shape as missing in the missing output, with translated values.

New keys are inserted next to their neighbors in en.json, and existing keys keep their order. A translation is skipped with a warning if:

Its key doesn't exist in en.json, or is a plural form the locale doesn't use.
The locale already has a translation for the key. Existing translations are never overwritten.
It's empty or not a string.
Its {{placeholders}} or <0> tags don't match the English text. Plural forms may add or drop {{count}}.

Automated sync

The Admin i18n Sync workflow runs daily. It finds missing translations, translates them with Claude, and opens a PR on the chore/admin-i18n-sync-translations branch. It skips runs while a previous sync PR is still open.