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/useEventSource.md

@@ -0,0 +1,204 @@
+---
+category: Network
+---
+
+# useEventSource
+
+An [EventSource](https://developer.mozilla.org/en-US/docs/Web/API/EventSource) or [Server-Sent-Events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events) instance opens a persistent connection to an HTTP server, which sends events in text/event-stream format.
+
+## Usage
+
+```ts
+import { useEventSource } from '@vueuse/core'
+
+const { status, data, error, close } = useEventSource('https://event-source-url')
+```
+
+See the [Type Declarations](#type-declarations) for more options.
+
+### Named Events
+
+You can define named events with the second parameter
+
+```ts
+import { useEventSource } from '@vueuse/core'
+// ---cut---
+const { event, data } = useEventSource(
+  'https://event-source-url',
+  ['notice', 'update']
+)
+```
+
+### immediate
+
+Enable by default.
+
+Establish the connection immediately when the composable is called.
+
+### autoConnect
+
+Enable by default.
+
+If url is provided as a ref, when the url changes, it will automatically reconnect to the new url.
+
+### Auto Reconnection on Errors
+
+Reconnect on errors automatically (disabled by default).
+
+```ts
+import { useEventSource } from '@vueuse/core'
+// ---cut---
+const { status, data, close } = useEventSource(
+  'https://event-source-url',
+  [],
+  {
+    autoReconnect: true,
+  }
+)
+```
+
+Or with more controls over its behavior:
+
+```ts
+import { useEventSource } from '@vueuse/core'
+// ---cut---
+const { status, data, close } = useEventSource(
+  'https://event-source-url',
+  [],
+  {
+    autoReconnect: {
+      retries: 3,
+      delay: 1000,
+      onFailed() {
+        alert('Failed to connect EventSource after 3 retries')
+      },
+    },
+  }
+)
+```
+
+### Data Serialization
+
+Apply custom transformations to incoming data using a serialization function.
+
+```ts
+import { useEventSource } from '@vueuse/core'
+// ---cut---
+const { data } = useEventSource(
+  'https://event-source-url',
+  [],
+  {
+    serializer: {
+      read: rawData => JSON.parse(rawData),
+    },
+  }
+)
+
+// If server sends: '{"name":"John","age":30}'
+// data.value will be: { name: 'John', age: 30 }
+```
+
+## Type Declarations
+
+```ts
+export type EventSourceStatus = "CONNECTING" | "OPEN" | "CLOSED"
+export interface UseEventSourceOptions<Data> extends EventSourceInit {
+  /**
+   * Enabled auto reconnect
+   *
+   * @default false
+   */
+  autoReconnect?:
+    | boolean
+    | {
+        /**
+         * Maximum retry times.
+         *
+         * Or you can pass a predicate function (which returns true if you want to retry).
+         *
+         * @default -1
+         */
+        retries?: number | (() => boolean)
+        /**
+         * Delay for reconnect, in milliseconds
+         *
+         * @default 1000
+         */
+        delay?: number
+        /**
+         * On maximum retry times reached.
+         */
+        onFailed?: Fn
+      }
+  /**
+   * Immediately open the connection when calling this composable
+   *
+   * @default true
+   */
+  immediate?: boolean
+  /**
+   * Automatically connect to the websocket when URL changes
+   *
+   * @default true
+   */
+  autoConnect?: boolean
+  /**
+   * Custom data serialization
+   */
+  serializer?: {
+    read: (v?: string) => Data
+  }
+}
+export interface UseEventSourceReturn<Events extends string[], Data = any> {
+  /**
+   * Reference to the latest data received via the EventSource,
+   * can be watched to respond to incoming messages
+   */
+  data: ShallowRef<Data | null>
+  /**
+   * The current state of the connection, can be only one of:
+   * 'CONNECTING', 'OPEN' 'CLOSED'
+   */
+  status: ShallowRef<EventSourceStatus>
+  /**
+   * The latest named event
+   */
+  event: ShallowRef<Events[number] | null>
+  /**
+   * The current error
+   */
+  error: ShallowRef<Event | null>
+  /**
+   * Closes the EventSource connection gracefully.
+   */
+  close: EventSource["close"]
+  /**
+   * Reopen the EventSource connection.
+   * If there the current one is active, will close it before opening a new one.
+   */
+  open: Fn
+  /**
+   * Reference to the current EventSource instance.
+   */
+  eventSource: Ref<EventSource | null>
+  /**
+   * The last event ID string, for server-sent events.
+   * @see https://developer.mozilla.org/en-US/docs/Web/API/MessageEvent/lastEventId
+   */
+  lastEventId: ShallowRef<string | null>
+}
+/**
+ * Reactive wrapper for EventSource.
+ *
+ * @see https://vueuse.org/useEventSource
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/EventSource/EventSource EventSource
+ * @param url
+ * @param events
+ * @param options
+ */
+export declare function useEventSource<Events extends string[], Data = any>(
+  url: MaybeRefOrGetter<string | URL | undefined>,
+  events?: Events,
+  options?: UseEventSourceOptions<Data>,
+): UseEventSourceReturn<Events, Data>
+```