feat: Add the primitives a review page reads in

.github/workflows/checks.yml

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+name: Checks
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  checks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Every export resolves
+        run: node scripts/check-exports.mjs
+
+      - name: The package is publishable
+        run: npm pack --dry-run

.gitignore

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+node_modules/

README.md

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+# SourceAnt design
+
+The pieces every SourceAnt surface is built from: the colour tokens, the
+primitives, and the graph renderer.
+
+It exists because the alternative was copying. A design copied by hand drifts
+the moment either copy changes, and the drift is invisible until somebody
+notices the two products no longer look like one.
+
+## What is in it, and what is not
+
+Tokens, and the pieces a screen is assembled from: `Avatar`, `Badge`, `Button`,
+`Card`, `Field`, `Input`, `ItemCard`, `Logo`, `Modal`, `PageHead`, `Select`,
+`Tabs`, `Textarea`, and `CodeGraph`.
+
+Nothing that knows what a workspace, a review or a proposal is. Those belong to
+whichever application has them, and a package that grew to hold them would be
+that application wearing a different name.
+
+## Using it
+
+Pin it by commit. There are no releases: this moves with the products that use
+it, and a version number would be a promise nobody is keeping yet. A pinned
+commit costs nothing and stops a change here breaking a build there.
+
+```json
+{
+  "dependencies": {
+    "@sourceant/design": "github:sourceant/design#<commit>"
+  }
+}
+```
+
+Take the Tailwind preset, and say which of your own files to scan:
+
+```js
+import design from '@sourceant/design/tailwind'
+
+export default {
+  presets: [design],
+  content: ['./index.html', './src/**/*.{js,ts,vue}'],
+}
+```
+
+Import the tokens once, before anything else:
+
+```js
+import '@sourceant/design/tokens.css'
+```
+
+Then use what you need:
+
+```js
+import { Button, Card, CodeGraph } from '@sourceant/design'
+```
+
+Source is shipped rather than a build, because every consumer already compiles
+Vue. Vite needs to be told not to pre-bundle it:
+
+```js
+export default defineConfig({
+  optimizeDeps: { exclude: ['@sourceant/design'] },
+})
+```
+
+## Themes
+
+Dark is the default. A `.light` class on the root element switches it; the
+tokens are defined for both and nothing else needs to know which is on.
+
+## Licence
+
+MIT.