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>

skills/vueuse-functions/references/useWindowScroll.md

@@ -0,0 +1,62 @@
+---
+category: Elements
+---
+
+# useWindowScroll
+
+Reactive window scroll
+
+## Usage
+
+```vue
+<script setup lang="ts">
+import { useWindowScroll } from '@vueuse/core'
+
+const { x, y } = useWindowScroll()
+</script>
+
+<template>
+  <div>
+    read current x, y scroll: {{ x }}, {{ y }}
+  </div>
+  <button @click="x = 100">
+    scroll X to 100
+  </button>
+  <button @click="y = 100">
+    scroll Y to 100
+  </button>
+</template>
+```
+
+## Type Declarations
+
+```ts
+export interface UseWindowScrollOptions
+  extends ConfigurableWindow,
+    UseScrollOptions {}
+/**
+ * Reactive window scroll.
+ *
+ * @see https://vueuse.org/useWindowScroll
+ * @param options
+ */
+export declare function useWindowScroll(options?: UseWindowScrollOptions): {
+  x: WritableComputedRef<number, number>
+  y: WritableComputedRef<number, number>
+  isScrolling: ShallowRef<boolean, boolean>
+  arrivedState: {
+    left: boolean
+    right: boolean
+    top: boolean
+    bottom: boolean
+  }
+  directions: {
+    left: boolean
+    right: boolean
+    top: boolean
+    bottom: boolean
+  }
+  measure(): void
+}
+export type UseWindowScrollReturn = ReturnType<typeof useWindowScroll>
+```