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/pinia/references/advanced-hmr.md

@@ -0,0 +1,61 @@
+---
+name: hot-module-replacement
+description: Enable HMR to preserve store state during development
+---
+
+# Hot Module Replacement (HMR)
+
+Pinia supports HMR to edit stores without page reload, preserving existing state.
+
+## Setup
+
+Add this snippet after each store definition:
+
+```ts
+import { defineStore, acceptHMRUpdate } from 'pinia'
+
+export const useAuth = defineStore('auth', {
+  // store options...
+})
+
+if (import.meta.hot) {
+  import.meta.hot.accept(acceptHMRUpdate(useAuth, import.meta.hot))
+}
+```
+
+## Setup Store Example
+
+```ts
+import { defineStore, acceptHMRUpdate } from 'pinia'
+
+export const useCounterStore = defineStore('counter', () => {
+  const count = ref(0)
+  const increment = () => count.value++
+  return { count, increment }
+})
+
+if (import.meta.hot) {
+  import.meta.hot.accept(acceptHMRUpdate(useCounterStore, import.meta.hot))
+}
+```
+
+## Bundler Support
+
+- **Vite:** Officially supported via `import.meta.hot`
+- **Webpack:** Uses `import.meta.webpackHot`
+- Any bundler implementing the `import.meta.hot` spec should work
+
+## Nuxt
+
+With `@pinia/nuxt`, `acceptHMRUpdate` is auto-imported but you still need to add the HMR snippet manually.
+
+## Benefits
+
+- Edit store logic without losing state
+- Add/remove state, actions, and getters on the fly
+- Faster development iteration
+
+<!--
+Source references:
+- https://pinia.vuejs.org/cookbook/hot-module-replacement.html
+-->