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/useUrlSearchParams.md

@@ -0,0 +1,121 @@
+---
+category: Browser
+---
+
+# useUrlSearchParams
+
+Reactive [URLSearchParams](https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams)
+
+## Usage
+
+```ts
+import { useUrlSearchParams } from '@vueuse/core'
+
+const params = useUrlSearchParams('history')
+
+console.log(params.foo) // 'bar'
+
+params.foo = 'bar'
+params.vueuse = 'awesome'
+// url updated to `?foo=bar&vueuse=awesome`
+```
+
+### Hash Mode
+
+When using with hash mode route, specify the `mode` to `hash`
+
+```ts
+import { useUrlSearchParams } from '@vueuse/core'
+
+const params = useUrlSearchParams('hash')
+
+params.foo = 'bar'
+params.vueuse = 'awesome'
+// url updated to `#/your/route?foo=bar&vueuse=awesome`
+```
+
+### Hash Params
+
+When using with history mode route, but want to use hash as params, specify the `mode` to `hash-params`
+
+```ts
+import { useUrlSearchParams } from '@vueuse/core'
+
+const params = useUrlSearchParams('hash-params')
+
+params.foo = 'bar'
+params.vueuse = 'awesome'
+// url updated to `/your/route#foo=bar&vueuse=awesome`
+```
+
+### Custom Stringify Function
+
+You can provide a custom function to serialize URL parameters using the `stringify` option. This is useful when you need special formatting for your query string.
+
+```js
+import { useUrlSearchParams } from '@vueuse/core'
+
+// Custom stringify function that removes equal signs for empty values
+const params = useUrlSearchParams('history', {
+  stringify: (params) => {
+    return params.toString().replace(/=(&|$)/g, '$1')
+  }
+})
+
+params.foo = ''
+params.bar = 'value'
+// url updated to `?foo&bar=value` instead of `?foo=&bar=value`
+```
+
+## Type Declarations
+
+```ts
+export type UrlParams = Record<string, string[] | string>
+export interface UseUrlSearchParamsOptions<T> extends ConfigurableWindow {
+  /**
+   * @default true
+   */
+  removeNullishValues?: boolean
+  /**
+   * @default false
+   */
+  removeFalsyValues?: boolean
+  /**
+   * @default {}
+   */
+  initialValue?: T
+  /**
+   * Write back to `window.history` automatically
+   *
+   * @default true
+   */
+  write?: boolean
+  /**
+   * Write mode for `window.history` when `write` is enabled
+   * - `replace`: replace the current history entry
+   * - `push`: push a new history entry
+   * @default 'replace'
+   */
+  writeMode?: "replace" | "push"
+  /**
+   * Custom function to serialize URL parameters
+   * When provided, this function will be used instead of the default URLSearchParams.toString()
+   * @param params The URLSearchParams object to serialize
+   * @returns The serialized query string (should not include the leading '?' or '#')
+   */
+  stringify?: (params: URLSearchParams) => string
+}
+/**
+ * Reactive URLSearchParams
+ *
+ * @see https://vueuse.org/useUrlSearchParams
+ * @param mode
+ * @param options
+ */
+export declare function useUrlSearchParams<
+  T extends Record<string, any> = UrlParams,
+>(
+  mode?: "history" | "hash" | "hash-params",
+  options?: UseUrlSearchParamsOptions<T>,
+): T
+```