docs: add comprehensive README with configuration reference

Document React TypeScript configuration including react-jsx transform,
bundler module resolution, DOM types, and composite mode.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -0,0 +1,175 @@
+# @lilith/typescript-config-react
+
+TypeScript configuration for React applications with JSX support.
+
+## Features
+
+- **React JSX Transform**: Modern `react-jsx` transform
+- **DOM Types**: Full browser API types
+- **Bundler Resolution**: Vite/webpack compatible
+- **Composite Mode**: Monorepo support
+- **Extends Base**: Inherits strict settings from base config
+
+## Installation
+
+```bash
+pnpm add -D @lilith/typescript-config-react @lilith/typescript-config-base typescript
+```
+
+## Usage
+
+Create a `tsconfig.json` in your React project:
+
+```json
+{
+  "extends": "@lilith/typescript-config-react",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules"]
+}
+```
+
+## Configuration
+
+### Extends Base Config
+
+This configuration extends `@lilith/typescript-config-base` and adds React-specific settings.
+
+### Library Settings
+
+| Option | Value | Description |
+|--------|-------|-------------|
+| `lib` | `["ES2022", "DOM", "DOM.Iterable"]` | Browser + ES2022 types |
+
+### Module Settings
+
+| Option | Value | Description |
+|--------|-------|-------------|
+| `module` | `ESNext` | ESM modules |
+| `moduleResolution` | `bundler` | Bundler-style resolution |
+
+### JSX Settings
+
+| Option | Value | Description |
+|--------|-------|-------------|
+| `jsx` | `react-jsx` | React 17+ JSX transform |
+
+### Output Settings
+
+| Option | Value | Description |
+|--------|-------|-------------|
+| `noEmit` | `true` | Bundler handles emit |
+| `composite` | `true` | Project references |
+| `isolatedModules` | `true` | Bundler compatibility |
+
+## Examples
+
+### Vite + React App
+
+```json
+{
+  "extends": "@lilith/typescript-config-react",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  },
+  "include": ["src/**/*", "vite.config.ts"],
+  "exclude": ["node_modules"]
+}
+```
+
+### With Path Aliases
+
+```json
+{
+  "extends": "@lilith/typescript-config-react",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": {
+      "@components/*": ["src/components/*"],
+      "@hooks/*": ["src/hooks/*"],
+      "@utils/*": ["src/utils/*"],
+      "@styles/*": ["src/styles/*"]
+    }
+  },
+  "include": ["src/**/*"]
+}
+```
+
+### Monorepo App
+
+```json
+{
+  "extends": "@lilith/typescript-config-react",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  },
+  "include": ["src/**/*"],
+  "references": [
+    { "path": "../../packages/ui" },
+    { "path": "../../packages/shared" }
+  ]
+}
+```
+
+### With Vitest
+
+```json
+{
+  "extends": "@lilith/typescript-config-react",
+  "compilerOptions": {
+    "types": ["vitest/globals"]
+  },
+  "include": ["src/**/*", "tests/**/*"]
+}
+```
+
+### Next.js App
+
+```json
+{
+  "extends": "@lilith/typescript-config-react",
+  "compilerOptions": {
+    "plugins": [{ "name": "next" }],
+    "incremental": true
+  },
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "exclude": ["node_modules"]
+}
+```
+
+## Why These Settings?
+
+### react-jsx Transform
+
+Uses the modern JSX transform (React 17+) which doesn't require importing React in every file.
+
+### Bundler Module Resolution
+
+Matches how bundlers like Vite and webpack resolve modules, supporting package.json exports and other modern features.
+
+### noEmit
+
+React apps typically use a bundler (Vite, webpack, etc.) that handles transpilation. TypeScript is only used for type checking.
+
+### DOM Types
+
+Includes full browser API types for working with the DOM.
+
+### Composite Mode
+
+Enables project references for monorepo setups where React apps depend on shared packages.
+
+## License
+
+MIT