Configure linter + prettier.

.prettierrc.json

@@ -0,0 +1,7 @@
+{
+  "semi": true,
+  "trailingComma": "all",
+  "singleQuote": true,
+  "printWidth": 80,
+  "tabWidth": 2
+}

.vscode/launch.json

@@ -1,29 +1,23 @@
 {
-    // Use IntelliSense to learn about possible attributes.
-    // Hover to view descriptions of existing attributes.
-    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "name": "Attach",
-            "port": 9229,
-            "request": "attach",
-            "skipFiles": [
-                "<node_internals>/**"
-            ],
-            "type": "node"
-        },
-        {
-            "type": "node",
-            "request": "launch",
-            "name": "Launch Program",
-            "skipFiles": [
-                "<node_internals>/**"
-            ],
-            "program": "${file}",
-            "outFiles": [
-                "${workspaceFolder}/**/*.js"
-            ]
-        }
-    ]
-}
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Attach",
+      "port": 9229,
+      "request": "attach",
+      "skipFiles": ["<node_internals>/**"],
+      "type": "node"
+    },
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Launch Program",
+      "skipFiles": ["<node_internals>/**"],
+      "program": "${file}",
+      "outFiles": ["${workspaceFolder}/**/*.js"]
+    }
+  ]
+}

README.md

@@ -51,3 +51,13 @@ To debug the CLI application using VS Code:
 2.  In VS Code, use the "Attach" launch configuration (found in `.vscode/launch.json`). This configuration is set up to attach to the Node.js process listening on port 9229, which is the default port used by `--inspect-brk`.
 
 Alternatively, you can use the "Launch Program" configuration in VS Code if you prefer to launch the currently open file directly, but the "Attach" method is generally recommended for debugging the main CLI entry point.
+
+## Formatting
+
+To format the code in this project, run the following command from the root directory:
+
+```bash
+npm run format
+```
+
+This command uses Prettier to format the code according to the project's style guidelines.

eslint.config.js

@@ -0,0 +1,137 @@
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import reactPlugin from 'eslint-plugin-react';
+import reactRecommended from 'eslint-plugin-react/configs/recommended.js';
+import reactHooks from 'eslint-plugin-react-hooks';
+import prettierConfig from 'eslint-config-prettier';
+import importPlugin from 'eslint-plugin-import';
+import globals from 'globals';
+
+export default tseslint.config(
+  {
+    // Global ignores
+    ignores: ['node_modules/**', 'eslint.config.js', 'packages/cli/dist/**'],
+  },
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  {
+    // React specific config
+    files: ['packages/cli/src/**/*.tsx'], // Target only TSX in the cli package
+    languageOptions: {
+      // Keep languageOptions from reactRecommended if needed, or define explicitly
+      parserOptions: {
+        ecmaFeatures: { jsx: true },
+      },
+      globals: {
+        ...globals.browser,
+      },
+    },
+    plugins: {
+      // Define the plugins used in this block
+      react: reactPlugin,
+      'react-hooks': reactHooks,
+    },
+    rules: {
+      // Apply recommended rules explicitly
+      ...reactRecommended.rules,
+      ...reactHooks.configs.recommended.rules,
+      // Custom overrides
+      'react/react-in-jsx-scope': 'off',
+      'react/prop-types': 'off',
+    },
+    settings: {
+      react: {
+        version: 'detect',
+      },
+    },
+  },
+  {
+    // Import specific config
+    files: ['packages/cli/src/**/*.{ts,tsx}'], // Target only TS/TSX in the cli package
+    plugins: {
+      import: importPlugin,
+    },
+    settings: {
+      'import/resolver': {
+        typescript: true,
+        node: true,
+      },
+    },
+    rules: {
+      ...importPlugin.configs.recommended.rules,
+      ...importPlugin.configs.typescript.rules,
+      'import/no-default-export': 'warn',
+      'import/no-unresolved': 'off', // Disable for now, can be noisy with monorepos/paths
+    },
+  },
+  {
+    // General overrides and rules for the project (TS/TSX files)
+    files: ['packages/cli/src/**/*.{ts,tsx}'], // Target only TS/TSX in the cli package
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...globals.es2021,
+      },
+    },
+    rules: {
+      // General Best Practice Rules (subset adapted for flat config)
+      '@typescript-eslint/array-type': ['error', { default: 'array-simple' }],
+      'arrow-body-style': ['error', 'as-needed'],
+      curly: ['error', 'multi-line'],
+      eqeqeq: ['error', 'always', { null: 'ignore' }],
+      '@typescript-eslint/consistent-type-assertions': [
+        'error',
+        { assertionStyle: 'as' },
+      ],
+      '@typescript-eslint/explicit-member-accessibility': [
+        'error',
+        { accessibility: 'no-public' },
+      ],
+      '@typescript-eslint/no-explicit-any': 'warn',
+      '@typescript-eslint/no-inferrable-types': [
+        'error',
+        { ignoreParameters: true, ignoreProperties: true },
+      ],
+      '@typescript-eslint/no-namespace': ['error', { allowDeclarations: true }],
+      '@typescript-eslint/no-unused-vars': [
+        'warn',
+        {
+          argsIgnorePattern: '^_',
+          varsIgnorePattern: '^_',
+          caughtErrorsIgnorePattern: '^_',
+        },
+      ],
+      'no-cond-assign': 'error',
+      'no-debugger': 'error',
+      'no-duplicate-case': 'error',
+      'no-restricted-syntax': [
+        'error',
+        {
+          selector: 'CallExpression[callee.name="require"]',
+          message: 'Avoid using require(). Use ES6 imports instead.',
+        },
+        {
+          selector: 'ThrowStatement > Literal:not([value=/^\\w+Error:/])',
+          message:
+            'Do not throw string literals or non-Error objects. Throw new Error("...") instead.',
+        },
+      ],
+      'no-unsafe-finally': 'error',
+      'no-unused-expressions': 'off', // Disable base rule
+      '@typescript-eslint/no-unused-expressions': [
+        // Enable TS version
+        'error',
+        { allowShortCircuit: true, allowTernary: true },
+      ],
+      'no-var': 'error',
+      'object-shorthand': 'error',
+      'one-var': ['error', 'never'],
+      'prefer-arrow-callback': 'error',
+      'prefer-const': ['error', { destructuring: 'all' }],
+      radix: 'error',
+      'default-case': 'error',
+    },
+  },
+  // Prettier config must be last
+  prettierConfig,
+);