feat: Complete fleet — 94 skills across 10+ domains

Pulled ALL skills from 15 source repositories: - anthropics/skills: 16 (docs, design, MCP, testing) - obra/superpowers: 14 (TDD, debugging, agents, planning) - coreyhaines31/marketingskills: 25 (marketing, CRO, SEO, growth) - better-auth/skills: 5 (auth patterns) - vercel-labs/agent-skills: 5 (React, design, Vercel) - antfu/skills: 16 (Vue, Vite, Vitest, pnpm, Turborepo) - Plus 13 individual skills from various repos Mosaic Stack is not limited to coding — the Orchestrator and subagents serve coding, business, design, marketing, writing, logistics, analysis, and more. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-16 16:27:42 -06:00
parent 861b28b965
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--- a/skills/vueuse-functions/references/useDark.md
+++ b/skills/vueuse-functions/references/useDark.md
@@ -0,0 +1,142 @@
+---
+category: Browser
+related:
+  - useColorMode
+  - usePreferredDark
+  - useStorage
+---
+
+# useDark
+
+Reactive dark mode with auto data persistence.
+
+<CourseLink href="https://vueschool.io/lessons/theming-with-vueuse-usedark-and-usecolormode?friend=vueuse">Learn useDark with this FREE video lesson from Vue School!</CourseLink>
+
+## Basic Usage
+
+```ts
+import { useDark, useToggle } from '@vueuse/core'
+
+const isDark = useDark()
+const toggleDark = useToggle(isDark)
+```
+
+## Behavior
+
+`useDark` combines with `usePreferredDark` and `useStorage`. On start up, it reads the value from localStorage/sessionStorage (the key is configurable) to see if there is a user configured color scheme, if not, it will use users' system preferences. When you change the `isDark` ref, it will update the corresponding element's attribute and then store the preference to storage (default key: `vueuse-color-scheme`) for persistence.
+
+> Please note `useDark` only handles the DOM attribute changes for you to apply proper selector in your CSS. It does NOT handle the actual style, theme or CSS for you.
+
+## Configuration
+
+By default, it uses [Tailwind CSS favored dark mode](https://tailwindcss.com/docs/dark-mode#toggling-dark-mode-manually), which enables dark mode when class `dark` is applied to the `html` tag, for example:
+
+```html
+<!--light-->
+<html>
+  ...
+</html>
+
+<!--dark-->
+<html class="dark">
+  ...
+</html>
+```
+
+Still, you can also customize it to make it work with most CSS frameworks.
+
+For example:
+
+```ts
+import { useDark } from '@vueuse/core'
+// ---cut---
+const isDark = useDark({
+  selector: 'body',
+  attribute: 'color-scheme',
+  valueDark: 'dark',
+  valueLight: 'light',
+})
+```
+
+will work like
+
+```html
+<!--light-->
+<html>
+  <body color-scheme="light">
+    ...
+  </body>
+</html>
+
+<!--dark-->
+<html>
+  <body color-scheme="dark">
+    ...
+  </body>
+</html>
+```
+
+If the configuration above still does not fit your needs, you can use the`onChanged` option to take full control over how you handle updates.
+
+```ts
+import { useDark } from '@vueuse/core'
+// ---cut---
+const isDark = useDark({
+  onChanged(dark) {
+    // update the dom, call the API or something
+  },
+})
+```
+
+## Component Usage
+
+```vue
+<template>
+  <UseDark v-slot="{ isDark, toggleDark }">
+    <button @click="toggleDark()">
+      Is Dark: {{ isDark }}
+    </button>
+  </UseDark>
+</template>
+```
+
+## Type Declarations
+
+```ts
+export interface UseDarkOptions
+  extends Omit<UseColorModeOptions<BasicColorSchema>, "modes" | "onChanged"> {
+  /**
+   * Value applying to the target element when isDark=true
+   *
+   * @default 'dark'
+   */
+  valueDark?: string
+  /**
+   * Value applying to the target element when isDark=false
+   *
+   * @default ''
+   */
+  valueLight?: string
+  /**
+   * A custom handler for handle the updates.
+   * When specified, the default behavior will be overridden.
+   *
+   * @default undefined
+   */
+  onChanged?: (
+    isDark: boolean,
+    defaultHandler: (mode: BasicColorSchema) => void,
+    mode: BasicColorSchema,
+  ) => void
+}
+/**
+ * Reactive dark mode with auto data persistence.
+ *
+ * @see https://vueuse.org/useDark
+ * @param options
+ */
+export declare function useDark(
+  options?: UseDarkOptions,
+): WritableComputedRef<boolean, boolean>
+export type UseDarkReturn = ReturnType<typeof useDark>
+```