Migrate to Builder Bob & ESLint v9

.github/workflows/ci.yml

@@ -0,0 +1,48 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  ci:
+    name: CI
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Typecheck
+        run: npm run typecheck
+
+      - name: Build
+        run: npm run build
+
+      - name: Ensure working tree clean (no unbuilt artifacts)
+        run: |
+          if [ -n "$(git status --porcelain)" ]; then
+            echo "Repository has uncommitted changes after build (likely missing build artifacts in commit)." >&2
+            git status --porcelain
+            exit 1
+          fi

.husky/pre-commit

@@ -1 +1,2 @@
-npm run lint
+npm run lint;
+npm run typecheck;

eslint.config.js

@@ -0,0 +1,63 @@
+// ESLint 9 Flat Config
+// See: https://eslint.org/docs/latest/use/configure/configuration-files-new
+const tsPlugin = require('@typescript-eslint/eslint-plugin');
+const tsParser = require('@typescript-eslint/parser');
+const reactPlugin = require('eslint-plugin-react');
+const reactHooksPlugin = require('eslint-plugin-react-hooks');
+const js = require('@eslint/js');
+
+module.exports = [
+  {
+    ignores: [
+      'lib/**',
+      'node_modules/**',
+      '*.d.ts',
+      'android/**',
+      'ios/**',
+    ],
+  },
+  {
+    files: ['src/**/*.{ts,tsx}'],
+    languageOptions: {
+      parser: tsParser,
+      parserOptions: {
+        ecmaVersion: 'latest',
+        sourceType: 'module',
+        ecmaFeatures: { jsx: true },
+      },
+      globals: {
+        __DEV__: 'readonly',
+        document: 'readonly',
+        require: 'readonly',
+        console: 'readonly',
+      },
+    },
+    plugins: {
+      '@typescript-eslint': tsPlugin,
+      react: reactPlugin,
+      'react-hooks': reactHooksPlugin,
+    },
+    settings: { react: { version: 'detect' } },
+    rules: {
+      // Base JS
+      ...js.configs.recommended.rules,
+      'no-unused-vars': 'off',
+
+      // React
+      ...reactPlugin.configs.recommended.rules,
+      ...reactHooksPlugin.configs.recommended.rules,
+      'react/react-in-jsx-scope': 'off',
+      'react/prop-types': 'off',
+
+      // TS
+      ...tsPlugin.configs.recommended.rules,
+      '@typescript-eslint/no-require-imports': 'off',
+      '@typescript-eslint/no-unused-expressions': 'off',
+      '@typescript-eslint/no-empty-object-type': 'off',
+      '@typescript-eslint/no-unused-vars': [
+        'warn',
+        { argsIgnorePattern: '^_', varsIgnorePattern: '^_' },
+      ],
+    },
+  },
+];