fantastic update

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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -6,6 +6,61 @@ No, [I will not add other color spaces](./documentation/FAQ.md#normal-colors).
 
 
 
+## Install
+
+```sh
+bun add uchu
+# or: npm install uchu / pnpm add uchu / yarn add uchu
+```
+
+
+
+## Usage
+
+### JavaScript / TypeScript
+
+```ts
+import { color, palette, reduced, yang } from "uchu";
+
+palette.blue[5];    // "oklch(54.87% 0.222 260.33)"
+color("red", 7);    // "oklch(49.95% 0.195 18.34)"
+reduced.green[2];   // mid-shade green from the reduced palette
+yang;               // off-white background constant
+```
+
+Types `Hue` and `Shade` are exported for narrowing palette keys.
+
+### CSS
+
+Drop the stylesheet in and use the CSS custom properties:
+
+```ts
+import "uchu/css";
+```
+
+```css
+body {
+  background-color: var(--uchu-yang);
+  border: 1px solid var(--uchu-blue-5);
+  color: var(--uchu-yin-9);
+}
+```
+
+### Sass / SCSS
+
+```scss
+@use "uchu/scss" as *;
+
+body {
+  background-color: $uchu-yang;
+  color: $uchu-yin-9;
+}
+```
+
+Prefer URL imports? See the [URL-based usage guide](./documentation/USAGE.md).
+
+
+
 ## Table of Contents
 
 - [Expanded Palette](./documentation/EXPANDED.md)