Prepare all packages for npm publishing

- Add author, repository, homepage, keywords, and engines fields to
  all 6 publishable package.json files
- Add README.md to react, tailwind-preset, and hex-background packages
- Add "type": "module" to web and react-native for consistency
- Rename web build script to .cjs for ESM package compatibility
- Remove overly broad "./dist/*" export from web package

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/tailwind-preset/README.md

@@ -0,0 +1,109 @@
+# @dangerousthings/tailwind-preset
+
+Tailwind CSS v3 preset that maps Dangerous Things design tokens to Tailwind theme values. Uses CSS custom property references so the same utility classes work across both DT and Classic brands at runtime.
+
+## Install
+
+```bash
+npm install @dangerousthings/tailwind-preset
+```
+
+### Peer Dependencies
+
+```bash
+npm install tailwindcss@^3.4
+```
+
+You also need a brand token CSS file loaded (from `@dangerousthings/web` or `@dangerousthings/tokens`).
+
+## Setup
+
+Add the preset to your `tailwind.config.js`:
+
+```js
+import dtPreset from "@dangerousthings/tailwind-preset";
+
+export default {
+  presets: [dtPreset],
+  content: ["./src/**/*.{tsx,ts,html}"],
+};
+```
+
+## Available Utilities
+
+### Colors
+
+All DT design token colors are available under the `dt-` prefix. Colors with `-rgb` variants support Tailwind opacity modifiers.
+
+```html
+<div class="bg-dt-bg text-dt-text-primary">
+  <h1 class="text-dt-primary">Heading</h1>
+  <p class="text-dt-text-secondary">Body text</p>
+  <button class="bg-dt-primary/50 text-dt-bg">50% opacity</button>
+</div>
+```
+
+| Utility | Token |
+|---------|-------|
+| `bg-dt-bg`, `text-dt-bg` | `--color-bg` |
+| `bg-dt-surface` | `--color-surface` |
+| `bg-dt-primary`, `text-dt-primary` | `--color-primary` |
+| `bg-dt-secondary` | `--color-secondary` |
+| `bg-dt-accent` | `--color-accent` |
+| `bg-dt-error` | `--color-error` |
+| `text-dt-text-primary` | `--color-text-primary` |
+| `text-dt-text-secondary` | `--color-text-secondary` |
+| `text-dt-text-muted` | `--color-text-muted` |
+
+### Mode Colors
+
+Card mode colors are available under the `mode-` prefix:
+
+```html
+<div class="border-mode-normal">Normal</div>
+<div class="text-mode-emphasis">Emphasis</div>
+<div class="bg-mode-warning">Warning</div>
+```
+
+### Spacing
+
+```html
+<div class="p-dt-4 gap-dt-2 m-dt-1">...</div>
+```
+
+| Utility | Token |
+|---------|-------|
+| `*-dt-1` through `*-dt-8` | `--space-1` through `--space-8` |
+
+### Border Radius
+
+```html
+<div class="rounded-dt">Default</div>
+<div class="rounded-dt-sm">Small</div>
+<div class="rounded-dt-lg">Large</div>
+```
+
+### Font Family
+
+```html
+<h1 class="font-dt-heading">Tektur heading</h1>
+<p class="font-dt-body">Body text</p>
+<code class="font-dt-mono">Monospace</code>
+```
+
+## Brand Switching
+
+Because the preset uses `var()` references, switching brands at runtime requires only changing the CSS custom properties (e.g., via `data-brand` attribute). No Tailwind rebuild is needed.
+
+```html
+<div data-brand="dt">Cyan neon theme</div>
+<div data-brand="classic">Navy magenta theme</div>
+```
+
+## Monorepo
+
+Part of the [DT Design System](https://github.com/nicholasgriffintn/dt-design-system) monorepo.
+
+## License
+
+[MIT](LICENSE)

packages/tailwind-preset/package.json

@@ -3,6 +3,27 @@
   "version": "0.1.0",
   "description": "Tailwind CSS v3 preset mapping DT design tokens to Tailwind theme",
   "license": "MIT",
+  "author": {
+    "name": "Dangerous Things",
+    "email": "info@dangerousthings.com"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/dangerous-tac0s/dt-design-system.git",
+    "directory": "packages/tailwind-preset"
+  },
+  "homepage": "https://github.com/dangerous-tac0s/dt-design-system#readme",
+  "keywords": [
+    "dangerousthings",
+    "design-system",
+    "tailwind",
+    "tailwindcss",
+    "preset",
+    "design-tokens"
+  ],
+  "engines": {
+    "node": ">=18.0.0"
+  },
   "type": "module",
   "exports": {
     ".": {