.eslintrc.js

module.exports = {
  root: true,
  parser: '@typescript-eslint/parser',
  plugins: ['@typescript-eslint', 'deprecation'],
  overrides: [
    {
      files: ['*.ts'],
      parserOptions: {
        project: './tsconfig.json',
        tsconfigRootDir: __dirname,
        extends: [
          'eslint:recommended',
          'plugin:@typescript-eslint/eslint-recommended',
          'plugin:@typescript-eslint/recommended',
          'prettier',
        ],
        rules: {
          // recommended for safety
          '@typescript-eslint/no-floating-promises': 'error', // forgetting to await Activities and Workflow APIs is bad
          'deprecation/deprecation': 'warn',

          // code style preference
          'object-shorthand': ['error', 'always'],

          // relaxed rules, for convenience
          '@typescript-eslint/no-unused-vars': [
            'warn',
            {
              argsIgnorePattern: '^_',
              varsIgnorePattern: '^_',
            },
          ],
          '@typescript-eslint/no-explicit-any': 'off',
        },
      },
    },
  ],
};