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/vue-best-practices/reference/plugin-prefer-provide-inject-over-global-properties.md

@@ -0,0 +1,120 @@
+# Prefer provide/inject Over Global Properties in Plugins
+
+## Rule
+
+When creating Vue plugins, prefer using `app.provide()` to make plugin functionality available to components instead of attaching properties to `app.config.globalProperties`.
+
+## Why This Matters
+
+1. **globalProperties don't work in setup()**: Properties attached to `globalProperties` are only accessible via `this` in Options API. They are NOT available in the Composition API's `setup()` function.
+
+2. **Type safety**: `provide/inject` integrates better with TypeScript and requires less type augmentation boilerplate.
+
+3. **Testability**: Injected dependencies are easier to mock in tests compared to global properties.
+
+4. **Code clarity**: Explicit `inject()` calls make dependencies visible, while global properties can appear "magic".
+
+5. **Scoping**: `provide/inject` follows Vue's component hierarchy, making it easier to provide different values to different parts of your app.
+
+## Bad Practice
+
+```typescript
+// plugins/i18n.ts
+export default {
+  install(app, options) {
+    // Attaching to globalProperties - only works with Options API
+    app.config.globalProperties.$translate = (key: string) => {
+      return key.split('.').reduce((o, i) => o?.[i], options)
+    }
+  }
+}
+
+// In component - requires type augmentation for TypeScript
+// Also DOES NOT work in <script setup>
+export default {
+  mounted() {
+    console.log(this.$translate('greeting.hello'))
+  }
+}
+```
+
+## Good Practice
+
+```typescript
+// plugins/i18n.ts
+import type { InjectionKey, App } from 'vue'
+
+export interface I18nOptions {
+  [key: string]: string | I18nOptions
+}
+
+export interface I18n {
+  translate: (key: string) => string
+  options: I18nOptions
+}
+
+export const i18nKey: InjectionKey<I18n> = Symbol('i18n')
+
+export default {
+  install(app: App, options: I18nOptions) {
+    const translate = (key: string): string => {
+      return key.split('.').reduce((o, i) => o?.[i], options) as string ?? key
+    }
+
+    // Use provide for Composition API compatibility
+    app.provide(i18nKey, { translate, options })
+  }
+}
+
+// In component - works in setup() and has full type safety
+<script setup lang="ts">
+import { inject } from 'vue'
+import { i18nKey } from '@/plugins/i18n'
+
+const i18n = inject(i18nKey)
+console.log(i18n?.translate('greeting.hello'))
+</script>
+```
+
+## Hybrid Approach
+
+If you must support both APIs (e.g., for backwards compatibility), provide both:
+
+```typescript
+export default {
+  install(app: App, options: I18nOptions) {
+    const i18n = {
+      translate: (key: string) => /* ... */
+    }
+
+    // For Composition API
+    app.provide(i18nKey, i18n)
+
+    // For Options API (use sparingly)
+    app.config.globalProperties.$i18n = i18n
+  }
+}
+```
+
+## TypeScript Type Augmentation (if using globalProperties)
+
+If you must use globalProperties, you need proper type augmentation:
+
+```typescript
+// types/vue.d.ts
+export {}
+
+declare module 'vue' {
+  interface ComponentCustomProperties {
+    $translate: (key: string) => string
+  }
+}
+```
+
+**Important**: The file MUST contain `export {}` or another top-level export/import. Without it, the augmentation will OVERWRITE types instead of augmenting them.
+
+## References
+
+- [Vue.js Plugins Documentation](https://vuejs.org/guide/reusability/plugins.html)
+- [Vue.js Provide/Inject](https://vuejs.org/guide/components/provide-inject.html)
+- [TypeScript with Options API](https://vuejs.org/guide/typescript/options-api.html)