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/useMath.md

@@ -0,0 +1,47 @@
+---
+category: '@Math'
+---
+
+# useMath
+
+Reactive `Math` methods.
+
+## Usage
+
+```ts
+import { useMath } from '@vueuse/math'
+
+const base = ref(2)
+const exponent = ref(3)
+const result = useMath('pow', base, exponent) // Ref<8>
+
+const num = ref(2)
+const root = useMath('sqrt', num) // Ref<1.4142135623730951>
+
+num.value = 4
+console.log(root.value) // 2
+```
+
+## Type Declarations
+
+```ts
+export type UseMathKeys = keyof {
+  [K in keyof Math as Math[K] extends (...args: any) => any
+    ? K
+    : never]: unknown
+}
+export type UseMathReturn<K extends keyof Math> = ReturnType<
+  Reactified<Math[K], true>
+>
+/**
+ * Reactive `Math` methods.
+ *
+ * @see https://vueuse.org/useMath
+ *
+ * @__NO_SIDE_EFFECTS__
+ */
+export declare function useMath<K extends keyof Math>(
+  key: K,
+  ...args: ArgumentsType<Reactified<Math[K], true>>
+): UseMathReturn<K>
+```