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/useCached.md

@@ -0,0 +1,53 @@
+---
+category: Utilities
+---
+
+# useCached
+
+Cache a ref with a custom comparator.
+
+## Usage
+
+```ts
+import { useCached } from '@vueuse/core'
+import { shallowRef } from 'vue'
+
+interface Data {
+  value: number
+  extra: number
+}
+
+const source = shallowRef<Data>({ value: 42, extra: 0 })
+const cached = useCached(source, (a, b) => a.value === b.value)
+
+source.value = {
+  value: 42,
+  extra: 1,
+}
+
+console.log(cached.value) // { value: 42, extra: 0 }
+
+source.value = {
+  value: 43,
+  extra: 1,
+}
+
+console.log(cached.value) // { value: 43, extra: 1 }
+```
+
+## Type Declarations
+
+```ts
+export interface UseCachedOptions<D extends boolean = true>
+  extends ConfigurableDeepRefs<D>,
+    WatchOptions {}
+export declare function useCached<T, D extends boolean = true>(
+  refValue: Ref<T>,
+  comparator?: (a: T, b: T) => boolean,
+  options?: UseCachedOptions<D>,
+): UseCachedReturn<T, D>
+export type UseCachedReturn<
+  T = any,
+  D extends boolean = true,
+> = ShallowOrDeepRef<T, D>
+```