feat: add SSR documentation and tanstack start docs

docs/cloud/cloudflare.mdx

@@ -28,6 +28,19 @@ In this guide, we'll walk you through configuring Cloudflare as your default clo
 
 :::
 
+## SSR Worker (beta)
+
+:::warning Availability
+
+Zephyr’s **SSR Worker** runtime is currently **beta** and **only available on Cloudflare** using **Zephyr’s default (managed) Cloudflare integration**.
+
+It is **not available** on Bring Your Own Cloud (BYOC) deployments (including custom/non-default integrations).
+
+Learn more: **[SSR Worker (beta)](/reference/ssr-worker)**.  
+Using TanStack Start? See: **[TanStack Start](/meta-frameworks/tanstack-start)**.
+
+:::
+
 ## Configure and Enable Cloudflare
 
 <Steps>

docs/meta-frameworks/tanstack-start.mdx

@@ -0,0 +1,75 @@
+---
+title: TanStack Start
+description: Deploy TanStack Start (Cloudflare template) to Zephyr by adding the Zephyr TanStack Start Vite plugin.
+head:
+  - - meta
+    - property: og:description
+      content: Deploy TanStack Start (Cloudflare template) to Zephyr by adding the Zephyr TanStack Start Vite plugin.
+---
+
+import { PackageManagerTabs } from '@rspress/core/theme';
+import BuildAuthInfo from '../../components/build-auth-info.mdx';
+
+# TanStack Start
+
+If you created your app with the **TanStack Start CLI** and selected the **Cloudflare** deployment option, deploying to Zephyr is just adding the Zephyr TanStack Start plugin to your Vite build.
+
+For the upstream CLI flow, see TanStack’s docs: **[TanStack Start (React) Quick Start](https://tanstack.com/start/latest/docs/framework/react/quick-start)**.
+
+For Cloudflare-specific setup details (Wrangler config, Cloudflare Vite plugin, etc.), see: **[Cloudflare Workers: TanStack Start](https://developers.cloudflare.com/workers/framework-guides/web-apps/tanstack-start/)**.
+
+:::info Prerequisites
+
+- Finished our [Prerequisites](/getting-started/installation) setup guide
+- Your organization is using **Zephyr’s managed Cloudflare integration** (the default integration)
+
+:::
+
+## Install
+
+Add the plugin to your project:
+
+<PackageManagerTabs command="add -D vite-plugin-tanstack-start-zephyr" />
+
+## Configure Vite
+
+In your `vite.config.ts`, import `withZephyrTanstackStart` and add it to the **end** of your `plugins` array (after TanStack Start):
+
+```ts filename="vite.config.ts"
+import { withZephyrTanstackStart } from 'vite-plugin-tanstack-start-zephyr';
+
+export default defineConfig({
+  plugins: [
+    // ...your existing plugins (cloudflare(), tanstackStart(), react(), etc.)
+    withZephyrTanstackStart(),
+  ],
+});
+```
+
+:::warning Git is required
+
+Zephyr derives your **Application UID** from your `package.json` and git context. Make sure your repo is initialized and has a remote (for example, GitHub).
+
+:::
+
+## Deploy
+
+Run your production build:
+
+```bash filename="Terminal"
+npm run build
+```
+
+On the first run, you’ll be prompted to authenticate:
+
+<BuildAuthInfo />
+
+## SSR Worker (beta)
+
+TanStack Start deployments on Zephyr use our **SSR Worker** runtime.
+
+- This is currently **beta** and **only available on Cloudflare**
+- It is **only available on Zephyr’s default (managed) Cloudflare integration**
+- It is **not available on Bring Your Own Cloud (BYOC)** deployments
+
+Learn more: **[SSR Worker (beta)](/reference/ssr-worker)**.

docs/reference/ssr-worker.mdx

@@ -0,0 +1,29 @@
+---
+title: SSR Worker (beta)
+description: Zephyr SSR Worker runtime for server-rendered deployments. Currently beta and Cloudflare-only on Zephyr's default integration.
+head:
+  - - meta
+    - property: og:description
+      content: Zephyr SSR Worker runtime for server-rendered deployments. Currently beta and Cloudflare-only on Zephyr's default integration.
+---
+
+# SSR Worker (beta)
+
+Zephyr’s **SSR Worker** is our runtime for serving **server-rendered** JavaScript applications at the edge. It runs your server entrypoint inside an isolate and serves the correct server/client assets for a deployed snapshot.
+
+## Availability (important)
+
+:::warning Beta + Cloudflare-only
+
+- **Beta**: this feature is in active development and the API/behavior may change
+- **Cloudflare-only**: currently available **only** on Cloudflare
+- **Default integration only**: available **only** on Zephyr’s default (managed) Cloudflare integration
+- **Not on BYOC**: not available on Bring Your Own Cloud deployments (including custom/non-default integrations)
+
+:::
+
+## How it relates to TanStack Start
+
+When you deploy a TanStack Start project using the Zephyr TanStack Start plugin, Zephyr uploads an **SSR snapshot** (server + client bundles) and configures the SSR Worker to execute the server entrypoint.
+
+See: **[TanStack Start](/meta-frameworks/tanstack-start)**.

rspress.config.ts

@@ -92,6 +92,8 @@ const sidebar: Sidebar = {
         {
           text: 'Deployment Hooks',
           link: '/features/deployment-hooks',
+        },
+        {
           text: 'Structured File Logs',
           link: '/features/file-logging',
         },
@@ -210,6 +212,10 @@ const sidebar: Sidebar = {
           text: 'Rslib',
           link: '/meta-frameworks/rslib',
         },
+        {
+          text: 'TanStack Start',
+          link: '/meta-frameworks/tanstack-start',
+        },
       ],
     },
     {
@@ -319,6 +325,10 @@ const sidebar: Sidebar = {
           text: 'Architecture',
           link: '/reference/architecture',
         },
+        {
+          text: 'SSR Worker (beta)',
+          link: '/reference/ssr-worker',
+        },
         {
           text: 'IP Allowlists',
           link: '/reference/allow-ip-addresses',
@@ -446,7 +456,6 @@ export default defineConfig({
         },
       ],
     }),
-    // @ts-expect-error Rspress plugin only accounts for stable not beta so there is type issues
     withZephyr(),
   ],
 });