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/watchOnce.md

@@ -0,0 +1,41 @@
+---
+category: Watch
+---
+
+# watchOnce
+
+Shorthand for watching value with `{ once: true }`. Once the callback fires once, the watcher will be stopped.
+See [Vue's docs](https://vuejs.org/guide/essentials/watchers.html#once-watchers) for full details.
+
+## Usage
+
+Similar to `watch`, but with `{ once: true }`
+
+```ts
+import { watchOnce } from '@vueuse/core'
+
+watchOnce(source, () => {
+  // triggers only once
+  console.log('source changed!')
+})
+```
+
+## Type Declarations
+
+```ts
+export declare function watchOnce<T extends Readonly<MultiWatchSources>>(
+  source: [...T],
+  cb: WatchCallback<MapSources<T>, MapOldSources<T, true>>,
+  options?: Omit<WatchOptions<true>, "once">,
+): WatchHandle
+export declare function watchOnce<T>(
+  source: WatchSource<T>,
+  cb: WatchCallback<T, T | undefined>,
+  options?: Omit<WatchOptions<true>, "once">,
+): WatchHandle
+export declare function watchOnce<T extends object>(
+  source: T,
+  cb: WatchCallback<T, T | undefined>,
+  options?: Omit<WatchOptions<true>, "once">,
+): WatchHandle
+```