Flagged SSR support (#2548)

* Checkpoint, basics are working

* Add the `--experimental-ssr` flag

* Adds the changeset

* Fixes population of getStaticPaths results

* Pass through the imported module

* Route manifest test

* Fix remaining tests

* Fix remaining tests

* Copy server assets over

* Fix types

* Allowing passing in the request to the Node version of App

* Improve the example app

* Gets CI to pass

67 files changed, 1684 insertions, 627 deletions

diff --git a/.changeset/slow-islands-fix.md b/.changeset/slow-islands-fix.md
new file mode 100644
index 000000000..1da871343
--- /dev/null
+++ b/.changeset/slow-islands-fix.md
@@ -0,0 +1,29 @@
+---
+'astro': patch
+---
+
+Experimental SSR Support
+
+> ⚠️ If you are a user of Astro and see this PR and think that you can start deploying your app to a server and get SSR, slow down a second! This is only the initial flag and **very basic support**. Styles are not loading correctly at this point, for example. Like we did with the `--experimental-static-build` flag, this feature will be refined over the next few weeks/months and we'll let you know when its ready for community testing.
+
+## Changes
+
+- This adds a new `--experimental-ssr` flag to `astro build` which will result in `dist/server/` and `dist/client/` directories.
+- SSR can be used through this API:
+  ```js
+  import { createServer } from 'http';
+  import { loadApp } from 'astro/app/node';
+
+  const app = await loadApp(new URL('./dist/server/', import.meta.url));
+
+  createServer((req, res) => {
+    const route = app.match(req);
+    if(route) {
+      let html = await app.render(req, route);
+    }
+
+  }).listen(8080);
+  ```
+- This API will be refined over time.
+- This only works in Node.js at the moment.
+- Many features will likely not work correctly, but rendering HTML at least should.
diff --git a/comp.txt b/comp.txt
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/comp.txt
diff --git a/examples/fast-build/package.json b/examples/fast-build/package.json
index 924671aa8..21fe139d5 100644
--- a/examples/fast-build/package.json
+++ b/examples/fast-build/package.json
@@ -11,7 +11,7 @@
   },
   "devDependencies": {
     "astro": "^0.23.0-next.6",
-    "preact": "~10.5.15",
+    "preact": "~10.6.5",
     "unocss": "^0.15.5",
     "vite-imagetools": "^4.0.1"
   }
diff --git a/examples/ssr/astro.config.mjs b/examples/ssr/astro.config.mjs
new file mode 100644
index 000000000..7c986b97d
--- /dev/null
+++ b/examples/ssr/astro.config.mjs
@@ -0,0 +1,12 @@
+// @ts-check
+
+export default /** @type {import('astro').AstroUserConfig} */ ({
+	renderers: ['@astrojs/renderer-svelte'],
+	vite: {
+		server: {
+			proxy: {
+				'/api': 'http://localhost:8085'
+			}
+		}
+	}
+});
diff --git a/examples/ssr/build.mjs b/examples/ssr/build.mjs
new file mode 100644
index 000000000..5d2e4a3aa
--- /dev/null
+++ b/examples/ssr/build.mjs
@@ -0,0 +1,12 @@
+import {execa} from 'execa';
+
+const api = execa('npm', ['run', 'dev-api']);
+api.stdout.pipe(process.stdout);
+api.stderr.pipe(process.stderr);
+
+const build = execa('yarn', ['astro', 'build', '--experimental-ssr']);
+build.stdout.pipe(process.stdout);
+build.stderr.pipe(process.stderr);
+await build;
+
+api.kill();
diff --git a/examples/ssr/package.json b/examples/ssr/package.json
new file mode 100644
index 000000000..c783a5416
--- /dev/null
+++ b/examples/ssr/package.json
@@ -0,0 +1,21 @@
+{
+  "name": "@example/ssr",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "dev-api": "node server/dev-api.mjs",
+    "dev": "npm run dev-api & astro dev --experimental-ssr",
+    "start": "astro dev",
+    "build": "echo 'Run yarn build-ssr instead'",
+    "build-ssr": "node build.mjs",
+    "server": "node server/server.mjs"
+  },
+  "devDependencies": {
+    "astro": "^0.23.0-next.0",
+    "unocss": "^0.15.5",
+    "vite-imagetools": "^4.0.1"
+  },
+  "dependencies": {
+    "@astropub/webapi": "^0.10.13"
+  }
+}
diff --git a/examples/ssr/public/images/products/cereal.jpg b/examples/ssr/public/images/products/cereal.jpg
new file mode 100644
index 000000000..c1f4cce4a
--- /dev/null
+++ b/examples/ssr/public/images/products/cereal.jpg
diff --git a/examples/ssr/public/images/products/muffins.jpg b/examples/ssr/public/images/products/muffins.jpg
new file mode 100644
index 000000000..897733ee8
--- /dev/null
+++ b/examples/ssr/public/images/products/muffins.jpg
diff --git a/examples/ssr/public/images/products/oats.jpg b/examples/ssr/public/images/products/oats.jpg
new file mode 100644
index 000000000..b8db72ae0
--- /dev/null
+++ b/examples/ssr/public/images/products/oats.jpg
diff --git a/examples/ssr/public/images/products/yogurt.jpg b/examples/ssr/public/images/products/yogurt.jpg
new file mode 100644
index 000000000..9cd39666d
--- /dev/null
+++ b/examples/ssr/public/images/products/yogurt.jpg
diff --git a/examples/ssr/server/api.mjs b/examples/ssr/server/api.mjs
new file mode 100644
index 000000000..3928d0507
--- /dev/null
+++ b/examples/ssr/server/api.mjs
@@ -0,0 +1,49 @@
+import fs from 'fs';
+const dbJSON = fs.readFileSync(new URL('./db.json', import.meta.url));
+const db = JSON.parse(dbJSON);
+const products = db.products;
+const productMap = new Map(products.map(product => [product.id, product]));
+
+const routes = [
+	{
+		match: /\/api\/products\/([0-9])+/,
+		async handle(_req, res, [,idStr]) {
+			const id = Number(idStr);
+			if(productMap.has(id)) {
+				const product = productMap.get(id);
+				res.writeHead(200, {
+					'Content-Type': 'application/json'
+				});
+				res.end(JSON.stringify(product));
+			} else {
+				res.writeHead(404, {
+					'Content-Type': 'text/plain'
+				});
+				res.end('Not found');
+			}
+		}
+	},
+	{
+		match: /\/api\/products/,
+		async handle(_req, res) {
+			res.writeHead(200, {
+				'Content-Type': 'application/json',
+			});
+			res.end(JSON.stringify(products));
+		}
+	}
+
+]
+
+export async function apiHandler(req, res) {
+	for(const route of routes) {
+		const match = route.match.exec(req.url);
+		if(match) {
+			return route.handle(req, res, match);
+		}
+	}
+	res.writeHead(404, {
+		'Content-Type': 'text/plain'
+	});
+	res.end('Not found');
+}
diff --git a/examples/ssr/server/db.json b/examples/ssr/server/db.json
new file mode 100644
index 000000000..76f9e4da3
--- /dev/null
+++ b/examples/ssr/server/db.json
@@ -0,0 +1,28 @@
+{
+  "products": [
+    {
+      "id": 1,
+      "name": "Cereal",
+      "price": 3.99,
+      "image": "/images/products/cereal.jpg"
+    },
+    {
+      "id": 2,
+      "name": "Yogurt",
+      "price": 3.97,
+      "image": "/images/products/yogurt.jpg"
+    },
+    {
+      "id": 3,
+      "name": "Rolled Oats",
+      "price": 2.89,
+      "image": "/images/products/oats.jpg"
+    },
+    {
+      "id": 4,
+      "name": "Muffins",
+      "price": 4.39,
+      "image": "/images/products/muffins.jpg"
+    }
+  ]
+}
diff --git a/examples/ssr/server/dev-api.mjs b/examples/ssr/server/dev-api.mjs
new file mode 100644
index 000000000..74e0ef83b
--- /dev/null
+++ b/examples/ssr/server/dev-api.mjs
@@ -0,0 +1,17 @@
+import { createServer } from 'http';
+import { apiHandler } from './api.mjs';
+
+const PORT = process.env.PORT || 8085;
+
+const server = createServer((req, res) => {
+	apiHandler(req, res).catch(err => {
+		console.error(err);
+		res.writeHead(500, {
+			'Content-Type': 'text/plain'
+		});
+		res.end(err.toString());
+	})
+});
+
+server.listen(PORT);
+console.log(`API running at http://localhost:${PORT}`);
diff --git a/examples/ssr/server/server.mjs b/examples/ssr/server/server.mjs
new file mode 100644
index 000000000..6f0a0dea6
--- /dev/null
+++ b/examples/ssr/server/server.mjs
@@ -0,0 +1,55 @@
+import { createServer } from 'http';
+import fs from 'fs';
+import mime from 'mime';
+import { loadApp } from 'astro/app/node';
+import { polyfill } from '@astropub/webapi'
+import { apiHandler } from './api.mjs';
+
+polyfill(globalThis);
+
+const clientRoot = new URL('../dist/client/', import.meta.url);
+const serverRoot = new URL('../dist/server/', import.meta.url);
+const app = await loadApp(serverRoot);
+
+async function handle(req, res) {
+	const route = app.match(req);
+
+	if(route) {
+		const html = await app.render(req, route);
+
+		res.writeHead(200, {
+			'Content-Type': 'text/html'
+		});
+		res.end(html)
+	} else if(/^\/api\//.test(req.url)) {
+		return apiHandler(req, res);
+	} else {
+		let local = new URL('.' + req.url, clientRoot);
+		try {
+			const data = await fs.promises.readFile(local);
+			res.writeHead(200, {
+				'Content-Type': mime.getType(req.url)
+			});
+			res.end(data);
+		} catch {
+			res.writeHead(404);
+			res.end();
+		}
+	}
+}
+
+const server = createServer((req, res) => {
+	handle(req, res).catch(err => {
+		console.error(err);
+		res.writeHead(500, {
+			'Content-Type': 'text/plain'
+		});
+		res.end(err.toString());
+	})
+});
+
+server.listen(8085);
+console.log('Serving at http://localhost:8085');
+
+// Silence weird <time> warning
+console.error = () => {};
diff --git a/examples/ssr/src/api.ts b/examples/ssr/src/api.ts
new file mode 100644
index 000000000..9fd7d0683
--- /dev/null
+++ b/examples/ssr/src/api.ts
@@ -0,0 +1,35 @@
+interface Product {
+	id: number;
+	name: string;
+	price: number;
+	image: string;
+}
+
+//let origin: string;
+const { mode } = import.meta.env;
+const origin = mode === 'develeopment' ?
+	`http://localhost:3000` :
+	`http://localhost:8085`;
+
+async function get<T>(endpoint: string, cb: (response: Response) => Promise<T>): Promise<T> {
+	const response = await fetch(`${origin}${endpoint}`);
+	if(!response.ok) {
+		// TODO make this better...
+		return null;
+	}
+	return cb(response);
+}
+
+export async function getProducts(): Promise<Product[]> {
+	return get<Product[]>('/api/products', async response => {
+		const products: Product[] = await response.json();
+		return products;
+	});
+}
+
+export async function getProduct(id: number): Promise<Product> {
+	return get<Product>(`/api/products/${id}`, async response => {
+		const product: Product = await response.json();
+		return product;
+	});
+}
diff --git a/examples/ssr/src/components/AddToCart.svelte b/examples/ssr/src/components/AddToCart.svelte
new file mode 100644
index 000000000..b03b8180a
--- /dev/null
+++ b/examples/ssr/src/components/AddToCart.svelte
@@ -0,0 +1,47 @@
+<script>
+	export let id = 0;
+
+	function addToCart() {
+		window.dispatchEvent(new CustomEvent('add-to-cart', {
+			detail: id
+		}));
+	}
+</script>
+<style>
+	button {
+  display:block;
+  padding:0.5em 1em 0.5em 1em;
+  border-radius:100px;
+  border:none;
+  font-size: 1.4em;
+  position:relative;
+  background:#0652DD;
+  cursor:pointer;
+  height:2em;
+  width:10em;
+  overflow:hidden;
+  transition:transform 0.1s;
+  z-index:1;
+}
+button:hover {
+  transform:scale(1.1);
+}
+
+.pretext {
+  color:#fff;
+  background:#0652DD;
+  position:absolute;
+  top:0;
+  left:0;
+  height:100%;
+  width:100%;
+  display:flex;
+  justify-content:center;
+  align-items:center;
+  font-family: 'Quicksand', sans-serif;
+	text-transform: uppercase;
+}
+</style>
+<button on:click={addToCart}>
+	<span class="pretext">Add to cart</span>
+</button>
diff --git a/examples/ssr/src/components/Cart.svelte b/examples/ssr/src/components/Cart.svelte
new file mode 100644
index 000000000..63dd1b5a5
--- /dev/null
+++ b/examples/ssr/src/components/Cart.svelte
@@ -0,0 +1,32 @@
+<script>
+	export let count = 0;
+	let items = new Set();
+
+	function onAddToCart(ev) {
+		const id = ev.detail;
+		items.add(id);
+		count++;
+	}
+</script>
+<style>
+	.cart {
+		display: flex;
+		align-items: center;
+	}
+	.cart :first-child {
+		margin-right: 5px;
+	}
+
+	.cart-icon {
+		font-size: 36px;
+	}
+
+	.count {
+		font-size: 24px;
+	}
+</style>
+<svelte:window on:add-to-cart={onAddToCart}/>
+<div class="cart">
+	<span class="material-icons cart-icon">shopping_cart</span>
+	<span class="count">{count}</span>
+</div>
diff --git a/examples/ssr/src/components/Container.astro b/examples/ssr/src/components/Container.astro
new file mode 100644
index 000000000..f982522b8
--- /dev/null
+++ b/examples/ssr/src/components/Container.astro
@@ -0,0 +1,12 @@
+---
+const { tag = 'div' } = Astro.props;
+const Tag = tag;
+---
+<style>
+	.container {
+		width: 1248px; /** TODO: responsive */
+		margin-left: auto;
+		margin-right: auto;
+	}
+</style>
+<Tag class="container"><slot /></Tag>
diff --git a/examples/ssr/src/components/Header.astro b/examples/ssr/src/components/Header.astro
new file mode 100644
index 000000000..2839c70d3
--- /dev/null
+++ b/examples/ssr/src/components/Header.astro
@@ -0,0 +1,31 @@
+---
+import TextDecorationSkip from './TextDecorationSkip.astro';
+import Cart from './Cart.svelte';
+---
+<style>
+	@import url('https://fonts.googleapis.com/css2?family=Lobster&display=swap');
+
+	header {
+		margin: 1rem 2rem;
+		display: flex;
+		justify-content: space-between;
+	}
+
+	h1 {
+		margin: 0;
+		font-family: 'Lobster', cursive;
+		color: black;
+	}
+
+	a, a:visited {
+		color: inherit;
+		text-decoration: none;
+	}
+</style>
+<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+<header>
+	<h1><a href="/"><TextDecorationSkip text="Online Store" /></a></h1>
+	<div class="right-pane">
+		<Cart client:idle />
+	</div>
+</header>
diff --git a/examples/ssr/src/components/ProductListing.astro b/examples/ssr/src/components/ProductListing.astro
new file mode 100644
index 000000000..c0af5a34c
--- /dev/null
+++ b/examples/ssr/src/components/ProductListing.astro
@@ -0,0 +1,61 @@
+---
+const { products } = Astro.props;
+---
+<style>
+	ul {
+		list-style-type: none;
+		margin: 0;
+		padding: 0;
+		display: flex;
+	}
+
+	figure {
+		width: 200px;
+		padding: 7px;
+		border: 1px solid black;
+		display: flex;
+		flex-direction: column;
+	}
+
+	figure figcaption {
+		text-align: center;
+		line-height: 1.6;
+	}
+
+	figure img {
+		width: 100%;
+		height: 250px;
+		object-fit: cover;
+	}
+
+	.product a {
+		display: block;
+		text-decoration: none;
+		color: inherit;
+	}
+
+	.name {
+		font-weight: 500;
+	}
+
+	.price {
+		font-size: 90%;
+		color: #787878;
+	}
+</style>
+<slot name="title"></slot>
+<ul>
+{products.map(product => (
+	<li class="product">
+		<a href={`/products/${product.id}`}>
+			<figure>
+				<img src={product.image} />
+				<figcaption>
+					<div class="name">{product.name}</div>
+					<div class="price">${product.price}</div>
+				</figcaption>
+			</figure>
+		</a>
+	</li>
+))}
+</ul>
diff --git a/examples/ssr/src/components/TextDecorationSkip.astro b/examples/ssr/src/components/TextDecorationSkip.astro
new file mode 100644
index 000000000..b35179ea8
--- /dev/null
+++ b/examples/ssr/src/components/TextDecorationSkip.astro
@@ -0,0 +1,15 @@
+---
+const { text } = Astro.props;
+const words = text.split(' ');
+const last = words.length - 1;
+---
+<style>
+ span {
+	text-decoration: underline;
+ }
+</style>
+{words.map((word, i) => (
+	<Fragment>
+		<span>{word}</span>{i !== last && (<Fragment>&#32;</Fragment>)}
+	</Fragment>
+))}
diff --git a/examples/ssr/src/pages/index.astro b/examples/ssr/src/pages/index.astro
new file mode 100644
index 000000000..ea2c6c2f6
--- /dev/null
+++ b/examples/ssr/src/pages/index.astro
@@ -0,0 +1,36 @@
+---
+import Header from '../components/Header.astro';
+import Container from '../components/Container.astro';
+import ProductListing from '../components/ProductListing.astro';
+import { getProducts } from '../api';
+import '../styles/common.css';
+
+const products = await getProducts();
+---
+<html>
+<head>
+	<title>Online Store</title>
+	<style>
+		h1 {
+			font-size: 36px;
+		}
+
+		.product-listing-title {
+			text-align: center;
+		}
+
+		.product-listing {
+
+		}
+	</style>
+</head>
+<body>
+	<Header />
+
+	<Container tag="main">
+		<ProductListing products={products} class="product-listing">
+			<h2 class="product-listing-title" slot="title">Product Listing</h2>
+		</ProductListing>
+	</Container>
+</body>
+</html>
diff --git a/examples/ssr/src/pages/products/[id].astro b/examples/ssr/src/pages/products/[id].astro
new file mode 100644
index 000000000..943f2ab84
--- /dev/null
+++ b/examples/ssr/src/pages/products/[id].astro
@@ -0,0 +1,55 @@
+---
+import Header from '../../components/Header.astro';
+import Container from '../../components/Container.astro';
+import AddToCart from '../../components/AddToCart.svelte';
+import { getProducts, getProduct } from '../../api';
+import '../../styles/common.css';
+
+export async function getStaticPaths() {
+	const products = await getProducts();
+	return products.map(product => {
+		return {
+			params: { id: product.id.toString() }
+		}
+	});
+}
+
+const id = Number(Astro.request.params.id);
+const product = await getProduct(id);
+---
+
+<html lang="en">
+<head>
+	<title>{product.name} | Online Store</title>
+	<style>
+		h2 {
+			text-align: center;
+			font-size: 3.5rem;
+		}
+
+		figure {
+			display: grid;
+			grid-template-columns: 1fr 1fr;
+		}
+
+		img {
+			width: 400px;
+		}
+	</style>
+</head>
+<body>
+	<Header />
+	
+	<Container tag="article">
+		<h2>{product.name}</h2>
+		<figure>
+				<img src={product.image} />
+			<figcaption>
+				<AddToCart id={id} client:idle />
+				<p>Description here...</p>
+			</figcaption>
+		</figure>
+
+	</Container>
+</body>
+</html>
diff --git a/examples/ssr/src/styles/common.css b/examples/ssr/src/styles/common.css
new file mode 100644
index 000000000..7879df33c
--- /dev/null
+++ b/examples/ssr/src/styles/common.css
@@ -0,0 +1,3 @@
+body {
+	font-family: "GT America Standard", "Helvetica Neue", Helvetica,Arial,sans-serif;
+}
diff --git a/packages/astro/package.json b/packages/astro/package.json
index fa5cb6583..59a50e1fb 100644
--- a/packages/astro/package.json
+++ b/packages/astro/package.json
@@ -15,6 +15,7 @@
   "types": "./dist/types/@types/astro.d.ts",
   "exports": {
     ".": "./astro.js",
+    "./app/node": "./dist/core/app/node.js",
     "./client/*": "./dist/runtime/client/*",
     "./components": "./components/index.js",
     "./components/*": "./components/*",
diff --git a/packages/astro/src/@types/astro.ts b/packages/astro/src/@types/astro.ts
index ea1dc6f4d..598530836 100644
--- a/packages/astro/src/@types/astro.ts
+++ b/packages/astro/src/@types/astro.ts
@@ -28,6 +28,7 @@ export interface CLIFlags {
 	port?: number;
 	config?: string;
 	experimentalStaticBuild?: boolean;
+	experimentalSsr?: boolean;
 	drafts?: boolean;
 }
 
@@ -102,7 +103,7 @@ export interface AstroUserConfig {
 	renderers?: string[];
 	/** Options for rendering markdown content */
 	markdownOptions?: {
-		render?: [string | MarkdownParser, Record<string, any>];
+		render?: MarkdownRenderOptions;
 	};
 	/** Options specific to `astro build` */
 	buildOptions?: {
@@ -132,6 +133,10 @@ export interface AstroUserConfig {
 		 * Default: false
 		 */
 		experimentalStaticBuild?: boolean;
+		/**
+		 * Enable a build for SSR support.
+		 */
+		experimentalSsr?: boolean;
 	};
 	/** Options for the development server run with `astro dev`. */
 	devOptions?: {
@@ -224,6 +229,7 @@ export interface ManifestData {
 	routes: RouteData[];
 }
 
+export type MarkdownRenderOptions = [string | MarkdownParser, Record<string, any>];
 export type MarkdownParser = (contents: string, options?: Record<string, any>) => MarkdownParserResponse | PromiseLike<MarkdownParserResponse>;
 
 export interface MarkdownParserResponse {
@@ -341,6 +347,11 @@ export interface RouteData {
 	type: 'page';
 }
 
+export type SerializedRouteData = Omit<RouteData, 'generate' | 'pattern'> & {
+	generate: undefined;
+	pattern: string;
+};
+
 export type RuntimeMode = 'development' | 'production';
 
 /**
diff --git a/packages/astro/src/cli/index.ts b/packages/astro/src/cli/index.ts
index b37edec1c..ce3be2efb 100644
--- a/packages/astro/src/cli/index.ts
+++ b/packages/astro/src/cli/index.ts
@@ -31,6 +31,7 @@ function printHelp() {
   --project-root <path>			Specify the path to the project root folder.
   --no-sitemap					Disable sitemap generation (build only).
   --experimental-static-build	A more performant build that expects assets to be define statically.
+	--experimental-ssr		Enable SSR compilation.
   --drafts                      Include markdown draft pages in the build.
   --verbose						Enable verbose logging
   --silent						Disable logging
diff --git a/packages/astro/src/core/app/common.ts b/packages/astro/src/core/app/common.ts
new file mode 100644
index 000000000..ef6d1ae74
--- /dev/null
+++ b/packages/astro/src/core/app/common.ts
@@ -0,0 +1,20 @@
+import type { SSRManifest, SerializedSSRManifest, RouteInfo } from './types';
+import { deserializeRouteData } from '../routing/manifest/serialization.js';
+
+export function deserializeManifest(serializedManifest: SerializedSSRManifest): SSRManifest {
+	const routes: RouteInfo[] = [];
+	for(const serializedRoute of serializedManifest.routes) {
+		routes.push({
+			...serializedRoute,
+			routeData: deserializeRouteData(serializedRoute.routeData)
+		});
+
+		const route = serializedRoute as unknown as RouteInfo;
+		route.routeData = deserializeRouteData(serializedRoute.routeData);
+	}
+
+	return {
+		...serializedManifest,
+		routes
+	};
+}
diff --git a/packages/astro/src/core/app/index.ts b/packages/astro/src/core/app/index.ts
new file mode 100644
index 000000000..38e5c3d6f
--- /dev/null
+++ b/packages/astro/src/core/app/index.ts
@@ -0,0 +1,100 @@
+import type { ComponentInstance, ManifestData, RouteData, Renderer } from '../../@types/astro';
+import type {
+	SSRManifest as Manifest, RouteInfo
+} from './types';
+
+import { defaultLogOptions } from '../logger.js';
+import { matchRoute } from '../routing/match.js';
+import { render } from '../render/core.js';
+import { RouteCache } from '../render/route-cache.js';
+import { createLinkStylesheetElementSet, createModuleScriptElementWithSrcSet } from '../render/ssr-element.js';
+import { createRenderer } from '../render/renderer.js';
+import { prependForwardSlash } from '../path.js';
+
+export class App {
+	#manifest: Manifest;
+	#manifestData: ManifestData;
+	#rootFolder: URL;
+	#routeDataToRouteInfo: Map<RouteData, RouteInfo>;
+	#routeCache: RouteCache;
+	#renderersPromise: Promise<Renderer[]>;
+
+	constructor(manifest: Manifest, rootFolder: URL) {
+		this.#manifest = manifest;
+		this.#manifestData = {
+			routes: manifest.routes.map(route => route.routeData)
+		};
+		this.#rootFolder = rootFolder;
+		this.#routeDataToRouteInfo = new Map(
+			manifest.routes.map(route => [route.routeData, route])
+		);
+		this.#routeCache = new RouteCache(defaultLogOptions);
+		this.#renderersPromise = this.#loadRenderers();
+	}
+	match({ pathname }: URL): RouteData | undefined {
+		return matchRoute(pathname, this.#manifestData);
+	}
+	async render(url: URL, routeData?: RouteData): Promise<string> {
+		if(!routeData) {
+			routeData = this.match(url);
+			if(!routeData) {
+				return 'Not found';
+			}
+		}
+
+		const manifest = this.#manifest;
+		const info = this.#routeDataToRouteInfo.get(routeData!)!;
+		const [mod, renderers] = await Promise.all([
+			this.#loadModule(info.file),
+			this.#renderersPromise
+		]);
+
+		const links = createLinkStylesheetElementSet(info.links, manifest.site);
+		const scripts = createModuleScriptElementWithSrcSet(info.scripts, manifest.site);
+
+		return render({
+			experimentalStaticBuild: true,
+			links,
+			logging: defaultLogOptions,
+			markdownRender: manifest.markdown.render,
+			mod,
+			origin: url.origin,
+			pathname: url.pathname,
+			scripts,
+			renderers,
+			async resolve(specifier: string) {
+				if(!(specifier in manifest.entryModules)) {
+					throw new Error(`Unable to resolve [${specifier}]`);
+				}
+				const bundlePath = manifest.entryModules[specifier];
+				return prependForwardSlash(bundlePath);
+			},
+			route: routeData,
+			routeCache: this.#routeCache,
+			site: this.#manifest.site
+		})
+	}
+	async #loadRenderers(): Promise<Renderer[]> {
+		const rendererNames = this.#manifest.renderers;
+		return await Promise.all(rendererNames.map(async (rendererName) => {
+			return createRenderer(rendererName, {
+				renderer(name) {
+					return import(name);
+				},
+				server(entry) {
+					return import(entry);
+				}
+			})
+		}));
+	}
+	async #loadModule(rootRelativePath: string): Promise<ComponentInstance> {
+		let modUrl = new URL(rootRelativePath, this.#rootFolder).toString();
+		let mod: ComponentInstance;
+		try {
+			mod = await import(modUrl);
+			return mod;
+		} catch(err) {
+			throw new Error(`Unable to import ${modUrl}. Does this file exist?`);
+		}
+	}
+}
diff --git a/packages/astro/src/core/app/node.ts b/packages/astro/src/core/app/node.ts
new file mode 100644
index 000000000..d1bcbf46b
--- /dev/null
+++ b/packages/astro/src/core/app/node.ts
@@ -0,0 +1,31 @@
+import type { SSRManifest, SerializedSSRManifest } from './types';
+
+import * as fs from 'fs';
+import { App } from './index.js';
+import { deserializeManifest } from './common.js';
+import { IncomingMessage } from 'http';
+
+function createURLFromRequest(req: IncomingMessage): URL {
+	return new URL(`http://${req.headers.host}${req.url}`);
+}
+
+class NodeApp extends App {
+	match(req: IncomingMessage | URL) {
+		return super.match(req instanceof URL ? req : createURLFromRequest(req));
+	}
+	render(req: IncomingMessage | URL) {
+		return super.render(req instanceof URL ? req : createURLFromRequest(req));
+	}
+}
+
+export async function loadManifest(rootFolder: URL): Promise<SSRManifest> {
+	const manifestFile = new URL('./manifest.json', rootFolder);
+	const rawManifest = await fs.promises.readFile(manifestFile, 'utf-8');
+	const serializedManifest: SerializedSSRManifest = JSON.parse(rawManifest);
+	return deserializeManifest(serializedManifest);
+}
+
+export async function loadApp(rootFolder: URL): Promise<NodeApp> {
+	const manifest = await loadManifest(rootFolder);
+	return new NodeApp(manifest, rootFolder);
+}
diff --git a/packages/astro/src/core/app/types.ts b/packages/astro/src/core/app/types.ts
new file mode 100644
index 000000000..8799ef1c9
--- /dev/null
+++ b/packages/astro/src/core/app/types.ts
@@ -0,0 +1,26 @@
+import type { RouteData, SerializedRouteData, MarkdownRenderOptions } from '../../@types/astro';
+
+export interface RouteInfo {
+	routeData: RouteData
+	file: string;
+	links: string[];
+	scripts: string[];
+}
+
+export type SerializedRouteInfo = Omit<RouteInfo, 'routeData'> & {
+	routeData: SerializedRouteData;
+}
+
+export interface SSRManifest {
+	routes: RouteInfo[];
+	site?: string;
+	markdown: {
+		render: MarkdownRenderOptions
+	},
+	renderers: string[];
+	entryModules: Record<string, string>;
+}
+
+export type SerializedSSRManifest = Omit<SSRManifest, 'routes'> & {
+	routes: SerializedRouteInfo[];
+}
diff --git a/packages/astro/src/core/build/index.ts b/packages/astro/src/core/build/index.ts
index b54e68622..68b12603d 100644
--- a/packages/astro/src/core/build/index.ts
+++ b/packages/astro/src/core/build/index.ts
@@ -8,12 +8,12 @@ import { performance } from 'perf_hooks';
 import vite, { ViteDevServer } from '../vite.js';
 import { createVite, ViteConfigWithSSR } from '../create-vite.js';
 import { debug, defaultLogOptions, info, levels, timerMessage, warn } from '../logger.js';
-import { createRouteManifest } from '../ssr/routing.js';
-import { generateSitemap } from '../ssr/sitemap.js';
+import { createRouteManifest } from '../routing/index.js';
+import { generateSitemap } from '../render/sitemap.js';
 import { collectPagesData } from './page-data.js';
 import { build as scanBasedBuild } from './scan-based-build.js';
 import { staticBuild } from './static-build.js';
-import { RouteCache } from '../ssr/route-cache.js';
+import { RouteCache } from '../render/route-cache.js';
 
 export interface BuildOptions {
 	mode?: string;
@@ -115,6 +115,7 @@ class AstroBuilder {
 				allPages,
 				astroConfig: this.config,
 				logging: this.logging,
+				manifest: this.manifest,
 				origin: this.origin,
 				pageNames,
 				routeCache: this.routeCache,
diff --git a/packages/astro/src/core/build/page-data.ts b/packages/astro/src/core/build/page-data.ts
index 106e09a05..945423080 100644
--- a/packages/astro/src/core/build/page-data.ts
+++ b/packages/astro/src/core/build/page-data.ts
@@ -1,4 +1,4 @@
-import type { AstroConfig, ComponentInstance, ManifestData, RouteData, RSSResult } from '../../@types/astro';
+import type { AstroConfig, ComponentInstance, ManifestData, RouteData } from '../../@types/astro';
 import type { AllPagesData } from './types';
 import type { LogOptions } from '../logger';
 import type { ViteDevServer } from '../vite.js';
@@ -6,9 +6,9 @@ import type { ViteDevServer } from '../vite.js';
 import { fileURLToPath } from 'url';
 import * as colors from 'kleur/colors';
 import { debug } from '../logger.js';
-import { preload as ssrPreload } from '../ssr/index.js';
-import { generateRssFunction } from '../ssr/rss.js';
-import { callGetStaticPaths, RouteCache, RouteCacheEntry } from '../ssr/route-cache.js';
+import { preload as ssrPreload } from '../render/dev/index.js';
+import { generateRssFunction } from '../render/rss.js';
+import { callGetStaticPaths, RouteCache, RouteCacheEntry } from '../render/route-cache.js';
 
 export interface CollectPagesDataOptions {
 	astroConfig: AstroConfig;
diff --git a/packages/astro/src/core/build/scan-based-build.ts b/packages/astro/src/core/build/scan-based-build.ts
index c11795fd8..e6d380b61 100644
--- a/packages/astro/src/core/build/scan-based-build.ts
+++ b/packages/astro/src/core/build/scan-based-build.ts
@@ -9,7 +9,7 @@ import vite from '../vite.js';
 import { createBuildInternals } from '../../core/build/internal.js';
 import { rollupPluginAstroBuildHTML } from '../../vite-plugin-build-html/index.js';
 import { rollupPluginAstroBuildCSS } from '../../vite-plugin-build-css/index.js';
-import { RouteCache } from '../ssr/route-cache.js';
+import { RouteCache } from '../render/route-cache.js';
 
 export interface ScanBasedBuildOptions {
 	allPages: AllPagesData;
diff --git a/packages/astro/src/core/build/static-build.ts b/packages/astro/src/core/build/static-build.ts
index 22255148d..3ab3e0cb4 100644
--- a/packages/astro/src/core/build/static-build.ts
+++ b/packages/astro/src/core/build/static-build.ts
@@ -1,12 +1,12 @@
-import type { OutputChunk, OutputAsset, PreRenderedChunk, RollupOutput } from 'rollup';
-import type { Plugin as VitePlugin, UserConfig } from '../vite';
-import type { AstroConfig, Renderer, SSRElement } from '../../@types/astro';
+import type { OutputChunk, OutputAsset, RollupOutput } from 'rollup';
+import type { Plugin as VitePlugin, UserConfig, Manifest as ViteManifest } from '../vite';
+import type { AstroConfig, ComponentInstance, ManifestData, Renderer } from '../../@types/astro';
 import type { AllPagesData } from './types';
 import type { LogOptions } from '../logger';
 import type { ViteConfigWithSSR } from '../create-vite';
 import type { PageBuildData } from './types';
 import type { BuildInternals } from '../../core/build/internal.js';
-import type { AstroComponentFactory } from '../../runtime/server';
+import type { SerializedSSRManifest, SerializedRouteInfo } from '../app/types';
 
 import fs from 'fs';
 import npath from 'path';
@@ -17,17 +17,18 @@ import { debug, error } from '../../core/logger.js';
 import { prependForwardSlash, appendForwardSlash } from '../../core/path.js';
 import { createBuildInternals } from '../../core/build/internal.js';
 import { rollupPluginAstroBuildCSS } from '../../vite-plugin-build-css/index.js';
-import { getParamsAndProps } from '../ssr/index.js';
-import { createResult } from '../ssr/result.js';
-import { renderPage } from '../../runtime/server/index.js';
-import { prepareOutDir } from './fs.js';
+import { emptyDir, prepareOutDir } from './fs.js';
 import { vitePluginHoistedScripts } from './vite-plugin-hoisted-scripts.js';
-import { RouteCache } from '../ssr/route-cache.js';
+import { RouteCache } from '../render/route-cache.js';
+import { serializeRouteData } from '../routing/index.js';
+import { render } from '../render/core.js';
+import { createLinkStylesheetElementSet, createModuleScriptElementWithSrcSet } from '../render/ssr-element.js';
 
 export interface StaticBuildOptions {
 	allPages: AllPagesData;
 	astroConfig: AstroConfig;
 	logging: LogOptions;
+	manifest: ManifestData;
 	origin: string;
 	pageNames: string[];
 	routeCache: RouteCache;
@@ -41,6 +42,12 @@ function addPageName(pathname: string, opts: StaticBuildOptions): void {
 	opts.pageNames.push(pathname.replace(/\/?$/, pathrepl).replace(/^\//, ''));
 }
 
+// Gives back a facadeId that is relative to the root.
+// ie, src/pages/index.astro instead of /Users/name..../src/pages/index.astro
+function rootRelativeFacadeId(facadeId: string, astroConfig: AstroConfig): string {
+	return facadeId.slice(fileURLToPath(astroConfig.projectRoot).length);
+}
+
 // Determines of a Rollup chunk is an entrypoint page.
 function chunkIsPage(astroConfig: AstroConfig, output: OutputAsset | OutputChunk, internals: BuildInternals) {
 	if (output.type !== 'chunk') {
@@ -48,7 +55,7 @@ function chunkIsPage(astroConfig: AstroConfig, output: OutputAsset | OutputChunk
 	}
 	const chunk = output as OutputChunk;
 	if (chunk.facadeModuleId) {
-		const facadeToEntryId = prependForwardSlash(chunk.facadeModuleId.slice(fileURLToPath(astroConfig.projectRoot).length));
+		const facadeToEntryId = prependForwardSlash(rootRelativeFacadeId(chunk.facadeModuleId, astroConfig));
 		return internals.entrySpecifierToBundleMap.has(facadeToEntryId);
 	}
 	return false;
@@ -88,6 +95,9 @@ function getByFacadeId<T>(facadeId: string, map: Map<string, T>): T | undefined
 export async function staticBuild(opts: StaticBuildOptions) {
 	const { allPages, astroConfig } = opts;
 
+	// Basic options
+	const staticMode = !astroConfig.buildOptions.experimentalSsr;
+
 	// The pages to be built for rendering purposes.
 	const pageInput = new Set<string>();
 
@@ -148,26 +158,38 @@ export async function staticBuild(opts: StaticBuildOptions) {
 	// Run the SSR build and client build in parallel
 	const [ssrResult] = (await Promise.all([ssrBuild(opts, internals, pageInput), clientBuild(opts, internals, jsInput)])) as RollupOutput[];
 
-	// Generate each of the pages.
-	await generatePages(ssrResult, opts, internals, facadeIdToPageDataMap);
-	await cleanSsrOutput(opts);
+	// SSG mode, generate pages.
+	if(staticMode) {
+		// Generate each of the pages.
+		await generatePages(ssrResult, opts, internals, facadeIdToPageDataMap);
+		await cleanSsrOutput(opts);
+	} else {
+		await generateManifest(ssrResult, opts, internals);
+		await ssrMoveAssets(opts);
+	}
 }
 
 async function ssrBuild(opts: StaticBuildOptions, internals: BuildInternals, input: Set<string>) {
 	const { astroConfig, viteConfig } = opts;
+	const ssr = astroConfig.buildOptions.experimentalSsr;
+	const out = ssr ? getServerRoot(astroConfig) : getOutRoot(astroConfig);
 
 	return await vite.build({
 		logLevel: 'error',
 		mode: 'production',
 		build: {
 			emptyOutDir: false,
+			manifest: ssr,
 			minify: false,
-			outDir: fileURLToPath(getOutRoot(astroConfig)),
+			outDir: fileURLToPath(out),
 			ssr: true,
 			rollupOptions: {
 				input: Array.from(input),
 				output: {
 					format: 'esm',
+					entryFileNames: '[name].[hash].mjs',
+					chunkFileNames: 'chunks/[name].[hash].mjs',
+					assetFileNames: 'assets/[name].[hash][extname]'
 				},
 			},
 			target: 'esnext', // must match an esbuild target
@@ -179,7 +201,7 @@ async function ssrBuild(opts: StaticBuildOptions, internals: BuildInternals, inp
 			}),
 			...(viteConfig.plugins || []),
 		],
-		publicDir: viteConfig.publicDir,
+		publicDir: ssr ? false : viteConfig.publicDir,
 		root: viteConfig.root,
 		envPrefix: 'PUBLIC_',
 		server: viteConfig.server,
@@ -196,17 +218,23 @@ async function clientBuild(opts: StaticBuildOptions, internals: BuildInternals,
 		return null;
 	}
 
+	const out = astroConfig.buildOptions.experimentalSsr ? getClientRoot(astroConfig) : getOutRoot(astroConfig);
+
 	return await vite.build({
 		logLevel: 'error',
 		mode: 'production',
 		build: {
 			emptyOutDir: false,
 			minify: 'esbuild',
-			outDir: fileURLToPath(getOutRoot(astroConfig)),
+			outDir: fileURLToPath(out),
 			rollupOptions: {
 				input: Array.from(input),
 				output: {
 					format: 'esm',
+					entryFileNames: '[name].[hash].js',
+					chunkFileNames: 'chunks/[name].[hash].js',
+					assetFileNames: 'assets/[name].[hash][extname]'
+					
 				},
 				preserveEntrySignatures: 'exports-only',
 			},
@@ -285,14 +313,13 @@ async function generatePage(output: OutputChunk, opts: StaticBuildOptions, inter
 	const hoistedId = getByFacadeId<string>(facadeId, internals.facadeIdToHoistedEntryMap) || null;
 
 	let compiledModule = await import(url.toString());
-	let Component = compiledModule.default;
 
 	const generationOptions: Readonly<GeneratePathOptions> = {
 		pageData,
 		internals,
 		linkIds,
 		hoistedId,
-		Component,
+		mod: compiledModule,
 		renderers,
 	};
 
@@ -314,65 +341,48 @@ interface GeneratePathOptions {
 	internals: BuildInternals;
 	linkIds: string[];
 	hoistedId: string | null;
-	Component: AstroComponentFactory;
+	mod: ComponentInstance;
 	renderers: Renderer[];
 }
 
 async function generatePath(pathname: string, opts: StaticBuildOptions, gopts: GeneratePathOptions) {
 	const { astroConfig, logging, origin, routeCache } = opts;
-	const { Component, internals, linkIds, hoistedId, pageData, renderers } = gopts;
+	const { mod, internals, linkIds, hoistedId, pageData, renderers } = gopts;
 
 	// This adds the page name to the array so it can be shown as part of stats.
 	addPageName(pathname, opts);
 
-	const [, mod] = pageData.preload;
+	debug('build', `Generating: ${pathname}`);
+
+	const site = astroConfig.buildOptions.site;
+	const links = createLinkStylesheetElementSet(linkIds, site);
+	const scripts = createModuleScriptElementWithSrcSet(hoistedId ? [hoistedId] : [], site);
 
 	try {
-		const [params, pageProps] = await getParamsAndProps({
+		const html = await render({
+			experimentalStaticBuild: true,
+			links,
+			logging,
+			markdownRender: astroConfig.markdownOptions.render,
+			mod,
+			origin,
+			pathname,
+			scripts,
+			renderers,
+			async resolve(specifier: string) {
+				const hashedFilePath = internals.entrySpecifierToBundleMap.get(specifier);
+				if (typeof hashedFilePath !== 'string') {
+					throw new Error(`Cannot find the built path for ${specifier}`);
+				}
+				const relPath = npath.posix.relative(pathname, '/' + hashedFilePath);
+				const fullyRelativePath = relPath[0] === '.' ? relPath : './' + relPath;
+				return fullyRelativePath;
+			},
 			route: pageData.route,
 			routeCache,
-			pathname,
+			site: astroConfig.buildOptions.site,
 		});
 
-		debug('build', `Generating: ${pathname}`);
-
-		const rootpath = appendForwardSlash(new URL(astroConfig.buildOptions.site || 'http://localhost/').pathname);
-		const links = new Set<SSRElement>(
-			linkIds.map((href) => ({
-				props: {
-					rel: 'stylesheet',
-					href: npath.posix.join(rootpath, href),
-				},
-				children: '',
-			}))
-		);
-		const scripts = hoistedId
-			? new Set<SSRElement>([
-					{
-						props: {
-							type: 'module',
-							src: npath.posix.join(rootpath, hoistedId),
-						},
-						children: '',
-					},
-			  ])
-			: new Set<SSRElement>();
-		const result = createResult({ astroConfig, logging, origin, params, pathname, renderers, links, scripts });
-
-		// Override the `resolve` method so that hydrated components are given the
-		// hashed filepath to the component.
-		result.resolve = async (specifier: string) => {
-			const hashedFilePath = internals.entrySpecifierToBundleMap.get(specifier);
-			if (typeof hashedFilePath !== 'string') {
-				throw new Error(`Cannot find the built path for ${specifier}`);
-			}
-			const relPath = npath.posix.relative(pathname, '/' + hashedFilePath);
-			const fullyRelativePath = relPath[0] === '.' ? relPath : './' + relPath;
-			return fullyRelativePath;
-		};
-
-		let html = await renderPage(result, Component, pageProps, null);
-
 		const outFolder = getOutFolder(astroConfig, pathname);
 		const outFile = getOutFile(astroConfig, outFolder, pathname);
 		await fs.promises.mkdir(outFolder, { recursive: true });
@@ -382,11 +392,79 @@ async function generatePath(pathname: string, opts: StaticBuildOptions, gopts: G
 	}
 }
 
+async function generateManifest(result: RollupOutput, opts: StaticBuildOptions, internals: BuildInternals) {
+	const { astroConfig, manifest } = opts;
+	const manifestFile = new URL('./manifest.json', getServerRoot(astroConfig));
+
+	const inputManifestJSON = await fs.promises.readFile(manifestFile, 'utf-8');
+	const data: ViteManifest = JSON.parse(inputManifestJSON);
+
+	const rootRelativeIdToChunkMap = new Map<string, OutputChunk>();
+	for(const output of result.output) {
+		if(chunkIsPage(astroConfig, output, internals)) {
+			const chunk = output as OutputChunk;
+			if(chunk.facadeModuleId) {
+				const id = rootRelativeFacadeId(chunk.facadeModuleId, astroConfig);
+				rootRelativeIdToChunkMap.set(id, chunk);
+			}
+		}
+	}
+
+	const routes: SerializedRouteInfo[] = [];
+
+	for(const routeData of manifest.routes) {
+		const componentPath = routeData.component;
+		const entry = data[componentPath];
+
+		if(!rootRelativeIdToChunkMap.has(componentPath)) {
+			throw new Error('Unable to find chunk for ' + componentPath);
+		}
+
+		const chunk = rootRelativeIdToChunkMap.get(componentPath)!;
+		const facadeId = chunk.facadeModuleId!;
+		const links = getByFacadeId<string[]>(facadeId, internals.facadeIdToAssetsMap) || [];
+		const hoistedScript = getByFacadeId<string>(facadeId, internals.facadeIdToHoistedEntryMap);
+		const scripts = hoistedScript ? [hoistedScript] : [];
+
+		routes.push({
+			file: entry?.file,
+			links,
+			scripts,
+			routeData: serializeRouteData(routeData)
+		});
+	}
+
+	const ssrManifest: SerializedSSRManifest = {
+		routes,
+		site: astroConfig.buildOptions.site,
+		markdown: {
+			render: astroConfig.markdownOptions.render
+		},
+		renderers: astroConfig.renderers,
+		entryModules: Object.fromEntries(internals.entrySpecifierToBundleMap.entries())
+	};
+	
+	const outputManifestJSON = JSON.stringify(ssrManifest, null, '  ');
+	await fs.promises.writeFile(manifestFile, outputManifestJSON, 'utf-8');
+}
+
 function getOutRoot(astroConfig: AstroConfig): URL {
 	const rootPathname = appendForwardSlash(astroConfig.buildOptions.site ? new URL(astroConfig.buildOptions.site).pathname : '/');
 	return new URL('.' + rootPathname, astroConfig.dist);
 }
 
+function getServerRoot(astroConfig: AstroConfig): URL {
+	const rootFolder = getOutRoot(astroConfig);
+	const serverFolder = new URL('./server/', rootFolder);
+	return serverFolder;
+}
+
+function getClientRoot(astroConfig: AstroConfig): URL {
+	const rootFolder = getOutRoot(astroConfig);
+	const serverFolder = new URL('./client/', rootFolder);
+	return serverFolder;
+}
+
 function getOutFolder(astroConfig: AstroConfig, pathname: string): URL {
 	const outRoot = getOutRoot(astroConfig);
 
@@ -421,6 +499,34 @@ async function cleanSsrOutput(opts: StaticBuildOptions) {
 	);
 }
 
+async function ssrMoveAssets(opts: StaticBuildOptions) {
+	const { astroConfig } = opts;
+	const serverRoot = getServerRoot(astroConfig);
+	const clientRoot = getClientRoot(astroConfig);
+	const serverAssets = new URL('./assets/', serverRoot);
+	const clientAssets = new URL('./assets/', clientRoot);
+	const files = await glob('assets/**/*', {
+		cwd: fileURLToPath(serverRoot),
+	});
+
+	// Make the directory
+	await fs.promises.mkdir(clientAssets, { recursive: true });
+
+	await Promise.all(
+		files.map(async (filename) => {
+			const currentUrl = new URL(filename, serverRoot);
+			const clientUrl = new URL(filename, clientRoot);
+			return fs.promises.rename(currentUrl, clientUrl);
+		})
+	);
+
+	await emptyDir(fileURLToPath(serverAssets));
+
+	if(fs.existsSync(serverAssets)) {
+		await fs.promises.rmdir(serverAssets);
+	}
+}
+
 export function vitePluginNewBuild(input: Set<string>, internals: BuildInternals, ext: 'js' | 'mjs'): VitePlugin {
 	return {
 		name: '@astro/rollup-plugin-new-build',
@@ -451,18 +557,6 @@ export function vitePluginNewBuild(input: Set<string>, internals: BuildInternals
 			}
 		},
 
-		outputOptions(outputOptions) {
-			Object.assign(outputOptions, {
-				entryFileNames(_chunk: PreRenderedChunk) {
-					return 'assets/[name].[hash].' + ext;
-				},
-				chunkFileNames(_chunk: PreRenderedChunk) {
-					return 'assets/[name].[hash].' + ext;
-				},
-			});
-			return outputOptions;
-		},
-
 		async generateBundle(_options, bundle) {
 			const promises = [];
 			const mapping = new Map<string, string>();
diff --git a/packages/astro/src/core/build/types.d.ts b/packages/astro/src/core/build/types.d.ts
index 2606075e2..fa37ff888 100644
--- a/packages/astro/src/core/build/types.d.ts
+++ b/packages/astro/src/core/build/types.d.ts
@@ -1,4 +1,4 @@
-import type { ComponentPreload } from '../ssr/index';
+import type { ComponentPreload } from '../render/dev/index';
 import type { RouteData } from '../../@types/astro';
 
 export interface PageBuildData {
diff --git a/packages/astro/src/core/config.ts b/packages/astro/src/core/config.ts
index 186677802..a8ddd5b79 100644
--- a/packages/astro/src/core/config.ts
+++ b/packages/astro/src/core/config.ts
@@ -63,6 +63,7 @@ export const AstroConfigSchema = z.object({
 				.optional()
 				.default('directory'),
 			experimentalStaticBuild: z.boolean().optional().default(false),
+			experimentalSsr: z.boolean().optional().default(false),
 			drafts: z.boolean().optional().default(false),
 		})
 		.optional()
@@ -130,6 +131,7 @@ function resolveFlags(flags: Partial<Flags>): CLIFlags {
 		config: typeof flags.config === 'string' ? flags.config : undefined,
 		hostname: typeof flags.hostname === 'string' ? flags.hostname : undefined,
 		experimentalStaticBuild: typeof flags.experimentalStaticBuild === 'boolean' ? flags.experimentalStaticBuild : false,
+		experimentalSsr: typeof flags.experimentalSsr === 'boolean' ? flags.experimentalSsr : false,
 		drafts: typeof flags.drafts === 'boolean' ? flags.drafts : false,
 	};
 }
@@ -143,6 +145,12 @@ function mergeCLIFlags(astroConfig: AstroUserConfig, flags: CLIFlags) {
 	if (typeof flags.port === 'number') astroConfig.devOptions.port = flags.port;
 	if (typeof flags.hostname === 'string') astroConfig.devOptions.hostname = flags.hostname;
 	if (typeof flags.experimentalStaticBuild === 'boolean') astroConfig.buildOptions.experimentalStaticBuild = flags.experimentalStaticBuild;
+	if (typeof flags.experimentalSsr === 'boolean') {
+		astroConfig.buildOptions.experimentalSsr = flags.experimentalSsr;
+		if(flags.experimentalSsr) {
+			astroConfig.buildOptions.experimentalStaticBuild = true;
+		}
+	}
 	if (typeof flags.drafts === 'boolean') astroConfig.buildOptions.drafts = flags.drafts;
 	return astroConfig;
 }
diff --git a/packages/astro/src/core/render/core.ts b/packages/astro/src/core/render/core.ts
new file mode 100644
index 000000000..eea5afa33
--- /dev/null
+++ b/packages/astro/src/core/render/core.ts
@@ -0,0 +1,119 @@
+import type { ComponentInstance, MarkdownRenderOptions, Params, Props, Renderer, RouteData, SSRElement } from '../../@types/astro';
+import type { LogOptions } from '../logger.js';
+
+import { renderPage } from '../../runtime/server/index.js';
+import { getParams } from '../routing/index.js';
+import { createResult } from './result.js';
+import { findPathItemByKey, RouteCache, callGetStaticPaths } from './route-cache.js';
+import { warn } from '../logger.js';
+
+interface GetParamsAndPropsOptions {
+	mod: ComponentInstance;
+	route: RouteData | undefined;
+	routeCache: RouteCache;
+	pathname: string;
+	logging: LogOptions;
+}
+
+async function getParamsAndProps(opts: GetParamsAndPropsOptions): Promise<[Params, Props]> {
+	const { logging, mod, route, routeCache, pathname } = opts;
+	// Handle dynamic routes
+	let params: Params = {};
+	let pageProps: Props;
+	if (route && !route.pathname) {
+		if (route.params.length) {
+			const paramsMatch = route.pattern.exec(pathname);
+			if (paramsMatch) {
+				params = getParams(route.params)(paramsMatch);
+			}
+		}
+		let routeCacheEntry = routeCache.get(route);
+		if (!routeCacheEntry) {
+			warn(logging, 'routeCache', `Internal Warning: getStaticPaths() called twice during the build. (${route.component})`);
+			routeCacheEntry = await callGetStaticPaths(mod, route, true, logging);
+			routeCache.set(route, routeCacheEntry);
+		}
+		const paramsKey = JSON.stringify(params);
+		const matchedStaticPath = findPathItemByKey(routeCacheEntry.staticPaths, paramsKey);
+		if (!matchedStaticPath) {
+			throw new Error(`[getStaticPaths] route pattern matched, but no matching static path found. (${pathname})`);
+		}
+		// This is written this way for performance; instead of spreading the props
+		// which is O(n), create a new object that extends props.
+		pageProps = Object.create(matchedStaticPath.props || Object.prototype);
+	} else {
+		pageProps = {};
+	}
+	return [params, pageProps];
+}
+
+interface RenderOptions {
+	experimentalStaticBuild: boolean;
+	logging: LogOptions,
+	links: Set<SSRElement>;
+	markdownRender: MarkdownRenderOptions,
+	mod: ComponentInstance;
+	origin: string;
+	pathname: string;
+	scripts: Set<SSRElement>;
+	resolve: (s: string) => Promise<string>;
+	renderers: Renderer[];
+	route?: RouteData;
+	routeCache: RouteCache;
+	site?: string;
+}
+
+export async function render(opts: RenderOptions): Promise<string> {
+	const {
+		experimentalStaticBuild,
+		links,
+		logging,
+		origin,
+		markdownRender,
+		mod,
+		pathname,
+		scripts,
+		renderers,
+		resolve,
+		route,
+		routeCache,
+		site
+	} = opts;
+
+	const [params, pageProps] = await getParamsAndProps({
+		logging,
+		mod,
+		route,
+		routeCache,
+		pathname,
+	});
+
+	// Validate the page component before rendering the page
+	const Component = await mod.default;
+	if (!Component) throw new Error(`Expected an exported Astro component but received typeof ${typeof Component}`);
+	if (!Component.isAstroComponentFactory) throw new Error(`Unable to SSR non-Astro component (${route?.component})`);
+
+
+	const result = createResult({
+		experimentalStaticBuild,
+		links,
+		logging,
+		markdownRender,
+		origin,
+		params,
+		pathname,
+		resolve,
+		renderers,
+		site,
+		scripts
+	});
+
+	let html = await renderPage(result, Component, pageProps, null);
+
+	// inject <!doctype html> if missing (TODO: is a more robust check needed for comments, etc.?)
+	if (experimentalStaticBuild && !/<!doctype html/i.test(html)) {
+		html = '<!DOCTYPE html>\n' + html;
+	}
+
+	return html;
+}
diff --git a/packages/astro/src/core/ssr/css.ts b/packages/astro/src/core/render/dev/css.ts
index 4ee0e80d8..196fdafd4 100644
--- a/packages/astro/src/core/ssr/css.ts
+++ b/packages/astro/src/core/render/dev/css.ts
@@ -1,7 +1,7 @@
-import type vite from '../vite';
+import type vite from '../../vite';
 
 import path from 'path';
-import { viteID } from '../util.js';
+import { viteID } from '../../util.js';
 
 // https://vitejs.dev/guide/features.html#css-pre-processors
 export const STYLE_EXTENSIONS = new Set(['.css', '.pcss', '.postcss', '.scss', '.sass', '.styl', '.stylus', '.less']);
diff --git a/packages/astro/src/core/render/dev/error.ts b/packages/astro/src/core/render/dev/error.ts
new file mode 100644
index 000000000..aa5a18083
--- /dev/null
+++ b/packages/astro/src/core/render/dev/error.ts
@@ -0,0 +1,44 @@
+import type { BuildResult } from 'esbuild';
+import type vite from '../../vite';
+import type { SSRError } from '../../../@types/astro';
+
+import eol from 'eol';
+import fs from 'fs';
+import { codeFrame } from '../../util.js';
+
+interface ErrorHandlerOptions {
+	filePath: URL;
+	viteServer: vite.ViteDevServer;
+}
+
+export async function errorHandler(e: unknown, { viteServer, filePath }: ErrorHandlerOptions) {
+	// normalize error stack line-endings to \n
+	if ((e as any).stack) {
+		(e as any).stack = eol.lf((e as any).stack);
+	}
+
+	// fix stack trace with Vite (this searches its module graph for matches)
+	if (e instanceof Error) {
+		viteServer.ssrFixStacktrace(e);
+	}
+
+	// Astro error (thrown by esbuild so it needs to be formatted for Vite)
+	if (Array.isArray((e as any).errors)) {
+		const { location, pluginName, text } = (e as BuildResult).errors[0];
+		const err = e as SSRError;
+		if (location) err.loc = { file: location.file, line: location.line, column: location.column };
+		let src = err.pluginCode;
+		if (!src && err.id && fs.existsSync(err.id)) src = await fs.promises.readFile(err.id, 'utf8');
+		if (!src) src = await fs.promises.readFile(filePath, 'utf8');
+		err.frame = codeFrame(src, err.loc);
+		err.id = location?.file;
+		err.message = `${location?.file}: ${text}
+${err.frame}
+`;
+		if (pluginName) err.plugin = pluginName;
+		throw err;
+	}
+
+	// Generic error (probably from Vite, and already formatted)
+	throw e;
+}
diff --git a/packages/astro/src/core/render/dev/hmr.ts b/packages/astro/src/core/render/dev/hmr.ts
new file mode 100644
index 000000000..3c795fdb1
--- /dev/null
+++ b/packages/astro/src/core/render/dev/hmr.ts
@@ -0,0 +1,11 @@
+import fs from 'fs';
+import { fileURLToPath } from 'url';
+
+let hmrScript: string;
+export async function getHmrScript() {
+	if (hmrScript) return hmrScript;
+	const filePath = fileURLToPath(new URL('../../../runtime/client/hmr.js', import.meta.url));
+	const content = await fs.promises.readFile(filePath);
+	hmrScript = content.toString();
+	return hmrScript;
+}
diff --git a/packages/astro/src/core/ssr/html.ts b/packages/astro/src/core/render/dev/html.ts
index eb429b927..2ae147ade 100644
--- a/packages/astro/src/core/ssr/html.ts
+++ b/packages/astro/src/core/render/dev/html.ts
@@ -1,4 +1,4 @@
-import type vite from '../vite';
+import type vite from '../../vite';
 
 import htmlparser2 from 'htmlparser2';
 
diff --git a/packages/astro/src/core/render/dev/index.ts b/packages/astro/src/core/render/dev/index.ts
new file mode 100644
index 000000000..70f142c33
--- /dev/null
+++ b/packages/astro/src/core/render/dev/index.ts
@@ -0,0 +1,158 @@
+import type vite from '../../vite';
+import type { AstroConfig, ComponentInstance, Renderer, RouteData, RuntimeMode } from '../../../@types/astro';
+import { LogOptions } from '../../logger.js';
+import { fileURLToPath } from 'url';
+import { getStylesForURL } from './css.js';
+import { injectTags } from './html.js';
+import { RouteCache } from '../route-cache.js';
+import { resolveRenderers } from './renderers.js';
+import { errorHandler } from './error.js';
+import { getHmrScript } from './hmr.js';
+import { render as coreRender } from '../core.js';
+import { createModuleScriptElementWithSrcSet } from '../ssr-element.js';
+
+interface SSROptions {
+	/** an instance of the AstroConfig */
+	astroConfig: AstroConfig;
+	/** location of file on disk */
+	filePath: URL;
+	/** logging options */
+	logging: LogOptions;
+	/** "development" or "production" */
+	mode: RuntimeMode;
+	/** production website, needed for some RSS & Sitemap functions */
+	origin: string;
+	/** the web request (needed for dynamic routes) */
+	pathname: string;
+	/** optional, in case we need to render something outside of a dev server */
+	route?: RouteData;
+	/** pass in route cache because SSR can’t manage cache-busting */
+	routeCache: RouteCache;
+	/** Vite instance */
+	viteServer: vite.ViteDevServer;
+}
+
+export type ComponentPreload = [Renderer[], ComponentInstance];
+
+const svelteStylesRE = /svelte\?svelte&type=style/;
+
+export async function preload({ astroConfig, filePath, viteServer }: SSROptions): Promise<ComponentPreload> {
+	// Important: This needs to happen first, in case a renderer provides polyfills.
+	const renderers = await resolveRenderers(viteServer, astroConfig);
+	// Load the module from the Vite SSR Runtime.
+	const mod = (await viteServer.ssrLoadModule(fileURLToPath(filePath))) as ComponentInstance;
+
+	return [renderers, mod];
+}
+
+/** use Vite to SSR */
+export async function render(renderers: Renderer[], mod: ComponentInstance, ssrOpts: SSROptions): Promise<string> {
+	const { astroConfig, filePath, logging, mode, origin, pathname, route, routeCache, viteServer } = ssrOpts;
+
+	// Add hoisted script tags
+	const scripts = createModuleScriptElementWithSrcSet(astroConfig.buildOptions.experimentalStaticBuild ?
+		Array.from(mod.$$metadata.hoistedScriptPaths()) :
+		[]
+	);
+
+	// Inject HMR scripts
+	if (mode === 'development' && astroConfig.buildOptions.experimentalStaticBuild) {
+		scripts.add({
+			props: { type: 'module', src: '/@vite/client' },
+			children: '',
+		});
+		scripts.add({
+			props: { type: 'module', src: new URL('../../runtime/client/hmr.js', import.meta.url).pathname },
+			children: '',
+		});
+	}
+
+	let html = await coreRender({
+		experimentalStaticBuild: astroConfig.buildOptions.experimentalStaticBuild,
+		links: new Set(),
+		logging,
+		markdownRender: astroConfig.markdownOptions.render,
+		mod,
+		origin,
+		pathname,
+		scripts,
+		// Resolves specifiers in the inline hydrated scripts, such as "@astrojs/renderer-preact/client.js"
+		async resolve(s: string) {
+			// The legacy build needs these to remain unresolved so that vite HTML
+			// Can do the resolution. Without this condition the build output will be
+			// broken in the legacy build. This can be removed once the legacy build is removed.
+			if (astroConfig.buildOptions.experimentalStaticBuild) {
+				const [, resolvedPath] = await viteServer.moduleGraph.resolveUrl(s);
+				return resolvedPath;
+			} else {
+				return s;
+			}
+		},
+		renderers,
+		route,
+		routeCache,
+		site: astroConfig.buildOptions.site,
+	});
+
+	// inject tags
+	const tags: vite.HtmlTagDescriptor[] = [];
+
+	// dev only: inject Astro HMR client
+	if (mode === 'development' && !astroConfig.buildOptions.experimentalStaticBuild) {
+		tags.push({
+			tag: 'script',
+			attrs: { type: 'module' },
+			// HACK: inject the direct contents of our `astro/runtime/client/hmr.js` to ensure
+			// `import.meta.hot` is properly handled by Vite
+			children: await getHmrScript(),
+			injectTo: 'head',
+		});
+	}
+
+	// inject CSS
+	[...getStylesForURL(filePath, viteServer)].forEach((href) => {
+		if (mode === 'development' && svelteStylesRE.test(href)) {
+			tags.push({
+				tag: 'script',
+				attrs: { type: 'module', src: href },
+				injectTo: 'head',
+			});
+		} else {
+			tags.push({
+				tag: 'link',
+				attrs: {
+					rel: 'stylesheet',
+					href,
+					'data-astro-injected': true,
+				},
+				injectTo: 'head',
+			});
+		}
+	});
+
+	// add injected tags
+	html = injectTags(html, tags);
+
+	// run transformIndexHtml() in dev to run Vite dev transformations
+	if (mode === 'development' && !astroConfig.buildOptions.experimentalStaticBuild) {
+		const relativeURL = filePath.href.replace(astroConfig.projectRoot.href, '/');
+		html = await viteServer.transformIndexHtml(relativeURL, html, pathname);
+	}
+
+	// inject <!doctype html> if missing (TODO: is a more robust check needed for comments, etc.?)
+	if (!/<!doctype html/i.test(html)) {
+		html = '<!DOCTYPE html>\n' + html;
+	}
+
+	return html;
+}
+
+export async function ssr(ssrOpts: SSROptions): Promise<string> {
+	try {
+		const [renderers, mod] = await preload(ssrOpts);
+		return await render(renderers, mod, ssrOpts); // note(drew): without "await", errors won’t get caught by errorHandler()
+	} catch (e: unknown) {
+		await errorHandler(e, { viteServer: ssrOpts.viteServer, filePath: ssrOpts.filePath });
+		throw e;
+	}
+}
diff --git a/packages/astro/src/core/render/dev/renderers.ts b/packages/astro/src/core/render/dev/renderers.ts
new file mode 100644
index 000000000..abe22b3ca
--- /dev/null
+++ b/packages/astro/src/core/render/dev/renderers.ts
@@ -0,0 +1,36 @@
+import type vite from '../../vite';
+import type { AstroConfig, Renderer } from '../../../@types/astro';
+
+import { resolveDependency } from '../../util.js';
+import { createRenderer } from '../renderer.js';
+
+const cache = new Map<string, Promise<Renderer>>();
+
+async function resolveRenderer(viteServer: vite.ViteDevServer, renderer: string, astroConfig: AstroConfig): Promise<Renderer> {
+	const resolvedRenderer: Renderer = await createRenderer(renderer, {
+		renderer(name) {
+			return import(resolveDependency(name, astroConfig));
+		},
+		async server(entry) {
+			const { url } = await viteServer.moduleGraph.ensureEntryFromUrl(entry);
+			const mod = await viteServer.ssrLoadModule(url);
+			return mod;
+		}
+	});
+
+	return resolvedRenderer;
+}
+
+export async function resolveRenderers(viteServer: vite.ViteDevServer, astroConfig: AstroConfig): Promise<Renderer[]> {
+	const ids: string[] = astroConfig.renderers;
+	const renderers = await Promise.all(
+		ids.map((renderer) => {
+			if (cache.has(renderer)) return cache.get(renderer)!;
+			let promise = resolveRenderer(viteServer, renderer, astroConfig);
+			cache.set(renderer, promise);
+			return promise;
+		})
+	);
+
+	return renderers;
+}
diff --git a/packages/astro/src/core/ssr/paginate.ts b/packages/astro/src/core/render/paginate.ts
index 96d8a435a..96d8a435a 100644
--- a/packages/astro/src/core/ssr/paginate.ts
+++ b/packages/astro/src/core/render/paginate.ts
diff --git a/packages/astro/src/core/render/renderer.ts b/packages/astro/src/core/render/renderer.ts
new file mode 100644
index 000000000..42025cfc0
--- /dev/null
+++ b/packages/astro/src/core/render/renderer.ts
@@ -0,0 +1,30 @@
+import type { Renderer } from '../../@types/astro';
+
+import npath from 'path';
+
+interface RendererResolverImplementation {
+	renderer: (name: string) => Promise<any>;
+	server: (entry: string) => Promise<any>;
+}
+
+export async function createRenderer(renderer: string, impl: RendererResolverImplementation) {
+	const resolvedRenderer: any = {};
+	// We can dynamically import the renderer by itself because it shouldn't have
+	// any non-standard imports, the index is just meta info.
+	// The other entrypoints need to be loaded through Vite.
+	const {
+		default: { name, client, polyfills, hydrationPolyfills, server },
+	} = await impl.renderer(renderer) //await import(resolveDependency(renderer, astroConfig));
+
+	resolvedRenderer.name = name;
+	if (client) resolvedRenderer.source = npath.posix.join(renderer, client);
+	resolvedRenderer.serverEntry = npath.posix.join(renderer, server);
+	if (Array.isArray(hydrationPolyfills)) resolvedRenderer.hydrationPolyfills = hydrationPolyfills.map((src: string) => npath.posix.join(renderer, src));
+	if (Array.isArray(polyfills)) resolvedRenderer.polyfills = polyfills.map((src: string) => npath.posix.join(renderer, src));
+
+	const { default: rendererSSR } = await impl.server(resolvedRenderer.serverEntry);
+	resolvedRenderer.ssr = rendererSSR;
+
+	const completedRenderer: Renderer = resolvedRenderer;
+	return completedRenderer;
+}
diff --git a/packages/astro/src/core/ssr/result.ts b/packages/astro/src/core/render/result.ts
index 5a03ab769..9775a0949 100644
--- a/packages/astro/src/core/ssr/result.ts
+++ b/packages/astro/src/core/render/result.ts
@@ -1,25 +1,37 @@
-import type { AstroConfig, AstroGlobal, AstroGlobalPartial, Params, Renderer, SSRElement, SSRResult } from '../../@types/astro';
+import type { AstroGlobal, AstroGlobalPartial, MarkdownParser, MarkdownRenderOptions, Params, Renderer, SSRElement, SSRResult } from '../../@types/astro';
 
 import { bold } from 'kleur/colors';
 import { canonicalURL as getCanonicalURL } from '../util.js';
-import { isCSSRequest } from './css.js';
+import { isCSSRequest } from './dev/css.js';
 import { isScriptRequest } from './script.js';
 import { renderSlot } from '../../runtime/server/index.js';
 import { warn, LogOptions } from '../logger.js';
 
 export interface CreateResultArgs {
-	astroConfig: AstroConfig;
+	experimentalStaticBuild: boolean;
 	logging: LogOptions;
 	origin: string;
+	markdownRender: MarkdownRenderOptions;
 	params: Params;
 	pathname: string;
 	renderers: Renderer[];
+	resolve: (s: string) => Promise<string>;
+	site: string | undefined;
 	links?: Set<SSRElement>;
 	scripts?: Set<SSRElement>;
 }
 
 export function createResult(args: CreateResultArgs): SSRResult {
-	const { astroConfig, origin, params, pathname, renderers } = args;
+	const {
+		experimentalStaticBuild,
+		origin,
+		markdownRender,
+		params,
+		pathname,
+		renderers,
+		resolve,
+		site: buildOptionsSite
+	} = args;
 
 	// Create the result object that will be passed into the render function.
 	// This object starts here as an empty shell (not yet the result) but then
@@ -32,7 +44,7 @@ export function createResult(args: CreateResultArgs): SSRResult {
 		createAstro(astroGlobal: AstroGlobalPartial, props: Record<string, any>, slots: Record<string, any> | null) {
 			const site = new URL(origin);
 			const url = new URL('.' + pathname, site);
-			const canonicalURL = getCanonicalURL('.' + pathname, astroConfig.buildOptions.site || origin);
+			const canonicalURL = getCanonicalURL('.' + pathname, buildOptionsSite || origin);
 			return {
 				__proto__: astroGlobal,
 				props,
@@ -42,7 +54,7 @@ export function createResult(args: CreateResultArgs): SSRResult {
 					url,
 				},
 				resolve(path: string) {
-					if (astroConfig.buildOptions.experimentalStaticBuild) {
+					if (experimentalStaticBuild) {
 						let extra = `This can be replaced with a dynamic import like so: await import("${path}")`;
 						if (isCSSRequest(path)) {
 							extra = `It looks like you are resolving styles. If you are adding a link tag, replace with this:
@@ -83,33 +95,37 @@ ${extra}`
 				},
 				// <Markdown> also needs the same `astroConfig.markdownOptions.render` as `.md` pages
 				async privateRenderMarkdownDoNotUse(content: string, opts: any) {
-					let mdRender = astroConfig.markdownOptions.render;
-					let renderOpts = {};
+					let [mdRender, renderOpts] = markdownRender;
+					let parser: MarkdownParser | null = null;
+					//let renderOpts = {};
 					if (Array.isArray(mdRender)) {
 						renderOpts = mdRender[1];
 						mdRender = mdRender[0];
 					}
 					// ['rehype-toc', opts]
 					if (typeof mdRender === 'string') {
-						({ default: mdRender } = await import(mdRender));
+						const mod: { default: MarkdownParser } = await import(mdRender);
+						parser = mod.default;
 					}
 					// [import('rehype-toc'), opts]
 					else if (mdRender instanceof Promise) {
-						({ default: mdRender } = await mdRender);
+						const mod: { default: MarkdownParser } = await mdRender;
+						parser = mod.default;
+					} else if(typeof mdRender === 'function') {
+						parser = mdRender;
+					} else {
+						throw new Error('No Markdown parser found.');
 					}
-					const { code } = await mdRender(content, { ...renderOpts, ...(opts ?? {}) });
+					const { code } = await parser(content, { ...renderOpts, ...(opts ?? {}) });
 					return code;
 				},
 			} as unknown as AstroGlobal;
 		},
-		// This is a stub and will be implemented by dev and build.
-		async resolve(s: string): Promise<string> {
-			return '';
-		},
+		resolve,
 		_metadata: {
 			renderers,
 			pathname,
-			experimentalStaticBuild: astroConfig.buildOptions.experimentalStaticBuild,
+			experimentalStaticBuild,
 		},
 	};
 
diff --git a/packages/astro/src/core/ssr/route-cache.ts b/packages/astro/src/core/render/route-cache.ts
index 11988d36b..889c64a48 100644
--- a/packages/astro/src/core/ssr/route-cache.ts
+++ b/packages/astro/src/core/render/route-cache.ts
@@ -1,8 +1,8 @@
 import type { ComponentInstance, GetStaticPathsItem, GetStaticPathsResult, GetStaticPathsResultKeyed, RouteData, RSS } from '../../@types/astro';
 import { LogOptions, warn, debug } from '../logger.js';
 
-import { generatePaginateFunction } from '../ssr/paginate.js';
-import { validateGetStaticPathsModule, validateGetStaticPathsResult } from './routing.js';
+import { generatePaginateFunction } from './paginate.js';
+import { validateGetStaticPathsModule, validateGetStaticPathsResult } from '../routing/index.js';
 
 type RSSFn = (...args: any[]) => any;
 
diff --git a/packages/astro/src/core/ssr/rss.ts b/packages/astro/src/core/render/rss.ts
index 18cce36a1..1e77dff35 100644
--- a/packages/astro/src/core/ssr/rss.ts
+++ b/packages/astro/src/core/render/rss.ts
@@ -1,4 +1,4 @@
-import type { RSSFunction, RSS, RSSResult, FeedResult, RouteData } from '../../@types/astro';
+import type { RSSFunction, RSS, RSSResult, RouteData } from '../../@types/astro';
 
 import { XMLValidator } from 'fast-xml-parser';
 import { canonicalURL, isValidURL, PRETTY_FEED_V3 } from '../util.js';
diff --git a/packages/astro/src/core/ssr/script.ts b/packages/astro/src/core/render/script.ts
index a91391963..a91391963 100644
--- a/packages/astro/src/core/ssr/script.ts
+++ b/packages/astro/src/core/render/script.ts
diff --git a/packages/astro/src/core/ssr/sitemap.ts b/packages/astro/src/core/render/sitemap.ts
index a5ef54f6a..a5ef54f6a 100644
--- a/packages/astro/src/core/ssr/sitemap.ts
+++ b/packages/astro/src/core/render/sitemap.ts
diff --git a/packages/astro/src/core/render/ssr-element.ts b/packages/astro/src/core/render/ssr-element.ts
new file mode 100644
index 000000000..5fbd3b115
--- /dev/null
+++ b/packages/astro/src/core/render/ssr-element.ts
@@ -0,0 +1,40 @@
+import type { SSRElement } from '../../@types/astro';
+
+import npath from 'path';
+import { appendForwardSlash } from '../../core/path.js';
+
+function getRootPath(site?: string): string {
+	return appendForwardSlash(new URL(site || 'http://localhost/').pathname)
+}
+
+function joinToRoot(href: string, site?: string): string {
+	return npath.posix.join(getRootPath(site), href);
+}
+
+export function createLinkStylesheetElement(href: string, site?: string): SSRElement {
+	return {
+		props: {
+			rel: 'stylesheet',
+			href: joinToRoot(href, site)
+		},
+		children: '',
+	};
+}
+
+export function createLinkStylesheetElementSet(hrefs: string[], site?: string) {
+	return new Set<SSRElement>(hrefs.map(href => createLinkStylesheetElement(href, site)));
+}
+
+export function createModuleScriptElementWithSrc(src: string, site?: string): SSRElement {
+	return {
+		props: {
+			type: 'module',
+			src: joinToRoot(src, site),
+		},
+		children: '',
+	}
+}
+
+export function createModuleScriptElementWithSrcSet(srces: string[], site?: string): Set<SSRElement> {
+	return new Set<SSRElement>(srces.map(src => createModuleScriptElementWithSrc(src, site)));
+}
diff --git a/packages/astro/src/core/routing/index.ts b/packages/astro/src/core/routing/index.ts
new file mode 100644
index 000000000..2bc9be954
--- /dev/null
+++ b/packages/astro/src/core/routing/index.ts
@@ -0,0 +1,11 @@
+export { createRouteManifest } from './manifest/create.js';
+export {
+	serializeRouteData,
+	deserializeRouteData
+} from './manifest/serialization.js';
+export { matchRoute } from './match.js';
+export { getParams } from './params.js';
+export {
+	validateGetStaticPathsModule,
+	validateGetStaticPathsResult
+} from './validation.js';
diff --git a/packages/astro/src/core/ssr/routing.ts b/packages/astro/src/core/routing/manifest/create.ts
index b6a2cf1a4..5456938ee 100644
--- a/packages/astro/src/core/ssr/routing.ts
+++ b/packages/astro/src/core/routing/manifest/create.ts
@@ -1,69 +1,16 @@
-import type { AstroConfig, ComponentInstance, GetStaticPathsResult, ManifestData, Params, RouteData } from '../../@types/astro';
-import type { LogOptions } from '../logger';
+import type {
+	AstroConfig,
+	ManifestData, 
+	RouteData
+} from '../../../@types/astro';
+import type { LogOptions } from '../../logger';
 
 import fs from 'fs';
 import path from 'path';
 import { compile } from 'path-to-regexp';
 import slash from 'slash';
 import { fileURLToPath } from 'url';
-import { warn } from '../logger.js';
-
-/**
- * given an array of params like `['x', 'y', 'z']` for
- * src/routes/[x]/[y]/[z]/svelte, create a function
- * that turns a RegExpExecArray into ({ x, y, z })
- */
-export function getParams(array: string[]) {
-	const fn = (match: RegExpExecArray) => {
-		const params: Params = {};
-		array.forEach((key, i) => {
-			if (key.startsWith('...')) {
-				params[key.slice(3)] = match[i + 1] ? decodeURIComponent(match[i + 1]) : undefined;
-			} else {
-				params[key] = decodeURIComponent(match[i + 1]);
-			}
-		});
-		return params;
-	};
-
-	return fn;
-}
-
-/** Find matching route from pathname */
-export function matchRoute(pathname: string, manifest: ManifestData): RouteData | undefined {
-	return manifest.routes.find((route) => route.pattern.test(pathname));
-}
-
-/** Throw error for deprecated/malformed APIs */
-export function validateGetStaticPathsModule(mod: ComponentInstance) {
-	if ((mod as any).createCollection) {
-		throw new Error(`[createCollection] deprecated. Please use getStaticPaths() instead.`);
-	}
-	if (!mod.getStaticPaths) {
-		throw new Error(`[getStaticPaths] getStaticPaths() function is required. Make sure that you \`export\` the function from your component.`);
-	}
-}
-
-/** Throw error for malformed getStaticPaths() response */
-export function validateGetStaticPathsResult(result: GetStaticPathsResult, logging: LogOptions) {
-	if (!Array.isArray(result)) {
-		throw new Error(`[getStaticPaths] invalid return value. Expected an array of path objects, but got \`${JSON.stringify(result)}\`.`);
-	}
-	result.forEach((pathObject) => {
-		if (!pathObject.params) {
-			warn(logging, 'getStaticPaths', `invalid path object. Expected an object with key \`params\`, but got \`${JSON.stringify(pathObject)}\`. Skipped.`);
-			return;
-		}
-		for (const [key, val] of Object.entries(pathObject.params)) {
-			if (!(typeof val === 'undefined' || typeof val === 'string')) {
-				warn(logging, 'getStaticPaths', `invalid path param: ${key}. A string value was expected, but got \`${JSON.stringify(val)}\`.`);
-			}
-			if (val === '') {
-				warn(logging, 'getStaticPaths', `invalid path param: ${key}. \`undefined\` expected for an optional param, but got empty string.`);
-			}
-		}
-	});
-}
+import { warn } from '../../logger.js';
 
 interface Part {
 	content: string;
@@ -82,6 +29,148 @@ interface Item {
 	routeSuffix: string;
 }
 
+function countOccurrences(needle: string, haystack: string) {
+	let count = 0;
+	for (let i = 0; i < haystack.length; i += 1) {
+		if (haystack[i] === needle) count += 1;
+	}
+	return count;
+}
+
+function getParts(part: string, file: string) {
+	const result: Part[] = [];
+	part.split(/\[(.+?\(.+?\)|.+?)\]/).map((str, i) => {
+		if (!str) return;
+		const dynamic = i % 2 === 1;
+
+		const [, content] = dynamic ? /([^(]+)$/.exec(str) || [null, null] : [null, str];
+
+		if (!content || (dynamic && !/^(\.\.\.)?[a-zA-Z0-9_$]+$/.test(content))) {
+			throw new Error(`Invalid route ${file} — parameter name must match /^[a-zA-Z0-9_$]+$/`);
+		}
+
+		result.push({
+			content,
+			dynamic,
+			spread: dynamic && /^\.{3}.+$/.test(content),
+		});
+	});
+
+	return result;
+}
+
+function getPattern(segments: Part[][], addTrailingSlash: AstroConfig['devOptions']['trailingSlash']) {
+	const pathname = segments
+		.map((segment) => {
+			return segment[0].spread
+				? '(?:\\/(.*?))?'
+				: '\\/' +
+						segment
+							.map((part) => {
+								if (part)
+									return part.dynamic
+										? '([^/]+?)'
+										: part.content
+												.normalize()
+												.replace(/\?/g, '%3F')
+												.replace(/#/g, '%23')
+												.replace(/%5B/g, '[')
+												.replace(/%5D/g, ']')
+												.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+							})
+							.join('');
+		})
+		.join('');
+
+	const trailing = addTrailingSlash && segments.length ? getTrailingSlashPattern(addTrailingSlash) : '$';
+	return new RegExp(`^${pathname || '\\/'}${trailing}`);
+}
+
+
+function getTrailingSlashPattern(addTrailingSlash: AstroConfig['devOptions']['trailingSlash']): string {
+	if (addTrailingSlash === 'always') {
+		return '\\/$';
+	}
+	if (addTrailingSlash === 'never') {
+		return '$';
+	}
+	return '\\/?$';
+}
+
+function getGenerator(segments: Part[][], addTrailingSlash: AstroConfig['devOptions']['trailingSlash']) {
+	const template = segments
+		.map((segment) => {
+			return segment[0].spread
+				? `/:${segment[0].content.substr(3)}(.*)?`
+				: '/' +
+						segment
+							.map((part) => {
+								if (part)
+									return part.dynamic
+										? `:${part.content}`
+										: part.content
+												.normalize()
+												.replace(/\?/g, '%3F')
+												.replace(/#/g, '%23')
+												.replace(/%5B/g, '[')
+												.replace(/%5D/g, ']')
+												.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+							})
+							.join('');
+		})
+		.join('');
+
+	const trailing = addTrailingSlash !== 'never' && segments.length ? '/' : '';
+	const toPath = compile(template + trailing);
+	return toPath;
+}
+
+function isSpread(str: string) {
+	const spreadPattern = /\[\.{3}/g;
+	return spreadPattern.test(str);
+}
+
+function comparator(a: Item, b: Item) {
+	if (a.isIndex !== b.isIndex) {
+		if (a.isIndex) return isSpread(a.file) ? 1 : -1;
+
+		return isSpread(b.file) ? -1 : 1;
+	}
+
+	const max = Math.max(a.parts.length, b.parts.length);
+
+	for (let i = 0; i < max; i += 1) {
+		const aSubPart = a.parts[i];
+		const bSubPart = b.parts[i];
+
+		if (!aSubPart) return 1; // b is more specific, so goes first
+		if (!bSubPart) return -1;
+
+		// if spread && index, order later
+		if (aSubPart.spread && bSubPart.spread) {
+			return a.isIndex ? 1 : -1;
+		}
+
+		// If one is ...spread order it later
+		if (aSubPart.spread !== bSubPart.spread) return aSubPart.spread ? 1 : -1;
+
+		if (aSubPart.dynamic !== bSubPart.dynamic) {
+			return aSubPart.dynamic ? 1 : -1;
+		}
+
+		if (!aSubPart.dynamic && aSubPart.content !== bSubPart.content) {
+			return bSubPart.content.length - aSubPart.content.length || (aSubPart.content < bSubPart.content ? -1 : 1);
+		}
+	}
+
+	if (a.isPage !== b.isPage) {
+		return a.isPage ? 1 : -1;
+	}
+
+	// otherwise sort alphabetically
+	return a.file < b.file ? -1 : 1;
+}
+
 /** Create manifest of all static routes */
 export function createRouteManifest({ config, cwd }: { config: AstroConfig; cwd?: string }, logging: LogOptions): ManifestData {
 	const components: string[] = [];
@@ -207,144 +296,3 @@ export function createRouteManifest({ config, cwd }: { config: AstroConfig; cwd?
 		routes,
 	};
 }
-
-function countOccurrences(needle: string, haystack: string) {
-	let count = 0;
-	for (let i = 0; i < haystack.length; i += 1) {
-		if (haystack[i] === needle) count += 1;
-	}
-	return count;
-}
-
-function isSpread(str: string) {
-	const spreadPattern = /\[\.{3}/g;
-	return spreadPattern.test(str);
-}
-
-function comparator(a: Item, b: Item) {
-	if (a.isIndex !== b.isIndex) {
-		if (a.isIndex) return isSpread(a.file) ? 1 : -1;
-
-		return isSpread(b.file) ? -1 : 1;
-	}
-
-	const max = Math.max(a.parts.length, b.parts.length);
-
-	for (let i = 0; i < max; i += 1) {
-		const aSubPart = a.parts[i];
-		const bSubPart = b.parts[i];
-
-		if (!aSubPart) return 1; // b is more specific, so goes first
-		if (!bSubPart) return -1;
-
-		// if spread && index, order later
-		if (aSubPart.spread && bSubPart.spread) {
-			return a.isIndex ? 1 : -1;
-		}
-
-		// If one is ...spread order it later
-		if (aSubPart.spread !== bSubPart.spread) return aSubPart.spread ? 1 : -1;
-
-		if (aSubPart.dynamic !== bSubPart.dynamic) {
-			return aSubPart.dynamic ? 1 : -1;
-		}
-
-		if (!aSubPart.dynamic && aSubPart.content !== bSubPart.content) {
-			return bSubPart.content.length - aSubPart.content.length || (aSubPart.content < bSubPart.content ? -1 : 1);
-		}
-	}
-
-	if (a.isPage !== b.isPage) {
-		return a.isPage ? 1 : -1;
-	}
-
-	// otherwise sort alphabetically
-	return a.file < b.file ? -1 : 1;
-}
-
-function getParts(part: string, file: string) {
-	const result: Part[] = [];
-	part.split(/\[(.+?\(.+?\)|.+?)\]/).map((str, i) => {
-		if (!str) return;
-		const dynamic = i % 2 === 1;
-
-		const [, content] = dynamic ? /([^(]+)$/.exec(str) || [null, null] : [null, str];
-
-		if (!content || (dynamic && !/^(\.\.\.)?[a-zA-Z0-9_$]+$/.test(content))) {
-			throw new Error(`Invalid route ${file} — parameter name must match /^[a-zA-Z0-9_$]+$/`);
-		}
-
-		result.push({
-			content,
-			dynamic,
-			spread: dynamic && /^\.{3}.+$/.test(content),
-		});
-	});
-
-	return result;
-}
-
-function getTrailingSlashPattern(addTrailingSlash: AstroConfig['devOptions']['trailingSlash']): string {
-	if (addTrailingSlash === 'always') {
-		return '\\/$';
-	}
-	if (addTrailingSlash === 'never') {
-		return '$';
-	}
-	return '\\/?$';
-}
-
-function getPattern(segments: Part[][], addTrailingSlash: AstroConfig['devOptions']['trailingSlash']) {
-	const pathname = segments
-		.map((segment) => {
-			return segment[0].spread
-				? '(?:\\/(.*?))?'
-				: '\\/' +
-						segment
-							.map((part) => {
-								if (part)
-									return part.dynamic
-										? '([^/]+?)'
-										: part.content
-												.normalize()
-												.replace(/\?/g, '%3F')
-												.replace(/#/g, '%23')
-												.replace(/%5B/g, '[')
-												.replace(/%5D/g, ']')
-												.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
-							})
-							.join('');
-		})
-		.join('');
-
-	const trailing = addTrailingSlash && segments.length ? getTrailingSlashPattern(addTrailingSlash) : '$';
-	return new RegExp(`^${pathname || '\\/'}${trailing}`);
-}
-
-function getGenerator(segments: Part[][], addTrailingSlash: AstroConfig['devOptions']['trailingSlash']) {
-	const template = segments
-		.map((segment) => {
-			return segment[0].spread
-				? `/:${segment[0].content.substr(3)}(.*)?`
-				: '/' +
-						segment
-							.map((part) => {
-								if (part)
-									return part.dynamic
-										? `:${part.content}`
-										: part.content
-												.normalize()
-												.replace(/\?/g, '%3F')
-												.replace(/#/g, '%23')
-												.replace(/%5B/g, '[')
-												.replace(/%5D/g, ']')
-												.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
-							})
-							.join('');
-		})
-		.join('');
-
-	const trailing = addTrailingSlash !== 'never' && segments.length ? '/' : '';
-	const toPath = compile(template + trailing);
-	return toPath;
-}
diff --git a/packages/astro/src/core/routing/manifest/serialization.ts b/packages/astro/src/core/routing/manifest/serialization.ts
new file mode 100644
index 000000000..e751cc517
--- /dev/null
+++ b/packages/astro/src/core/routing/manifest/serialization.ts
@@ -0,0 +1,29 @@
+import type {
+	RouteData,
+	SerializedRouteData
+} from '../../../@types/astro';
+
+function createRouteData(pattern: RegExp, params: string[], component: string, pathname: string | undefined): RouteData {
+	return {
+		type: 'page',
+		pattern,
+		params,
+		component,
+		// TODO bring back
+		generate: () => '',
+		pathname: pathname || undefined,
+	}
+}
+
+export function serializeRouteData(routeData: RouteData): SerializedRouteData {
+	// Is there a better way to do this in TypeScript?
+	const outRouteData = routeData as unknown as SerializedRouteData;
+	outRouteData.pattern = routeData.pattern.source;
+	return outRouteData;
+}
+
+export function deserializeRouteData(rawRouteData: SerializedRouteData) {
+	const { component, params, pathname } = rawRouteData;
+	const pattern = new RegExp(rawRouteData.pattern);
+	return createRouteData(pattern, params, component, pathname);
+}
diff --git a/packages/astro/src/core/routing/match.ts b/packages/astro/src/core/routing/match.ts
new file mode 100644
index 000000000..d5cf4e860
--- /dev/null
+++ b/packages/astro/src/core/routing/match.ts
@@ -0,0 +1,10 @@
+import type {
+	ManifestData,
+	RouteData
+} from '../../@types/astro';
+
+/** Find matching route from pathname */
+export function matchRoute(pathname: string, manifest: ManifestData): RouteData | undefined {
+	return manifest.routes.find((route) => route.pattern.test(pathname));
+}
+
diff --git a/packages/astro/src/core/routing/params.ts b/packages/astro/src/core/routing/params.ts
new file mode 100644
index 000000000..739a99afd
--- /dev/null
+++ b/packages/astro/src/core/routing/params.ts
@@ -0,0 +1,23 @@
+import type { Params } from '../../@types/astro';
+
+/**
+ * given an array of params like `['x', 'y', 'z']` for
+ * src/routes/[x]/[y]/[z]/svelte, create a function
+ * that turns a RegExpExecArray into ({ x, y, z })
+ */
+ export function getParams(array: string[]) {
+	const fn = (match: RegExpExecArray) => {
+		const params: Params = {};
+		array.forEach((key, i) => {
+			if (key.startsWith('...')) {
+				params[key.slice(3)] = match[i + 1] ? decodeURIComponent(match[i + 1]) : undefined;
+			} else {
+				params[key] = decodeURIComponent(match[i + 1]);
+			}
+		});
+		return params;
+	};
+
+	return fn;
+}
+
diff --git a/packages/astro/src/core/routing/validation.ts b/packages/astro/src/core/routing/validation.ts
new file mode 100644
index 000000000..db47f6089
--- /dev/null
+++ b/packages/astro/src/core/routing/validation.ts
@@ -0,0 +1,37 @@
+import type { 
+	ComponentInstance,
+	GetStaticPathsResult
+} from '../../@types/astro';
+import type { LogOptions } from '../logger';
+import { warn } from '../logger.js';
+
+/** Throw error for deprecated/malformed APIs */
+export function validateGetStaticPathsModule(mod: ComponentInstance) {
+	if ((mod as any).createCollection) {
+		throw new Error(`[createCollection] deprecated. Please use getStaticPaths() instead.`);
+	}
+	if (!mod.getStaticPaths) {
+		throw new Error(`[getStaticPaths] getStaticPaths() function is required. Make sure that you \`export\` the function from your component.`);
+	}
+}
+
+/** Throw error for malformed getStaticPaths() response */
+export function validateGetStaticPathsResult(result: GetStaticPathsResult, logging: LogOptions) {
+	if (!Array.isArray(result)) {
+		throw new Error(`[getStaticPaths] invalid return value. Expected an array of path objects, but got \`${JSON.stringify(result)}\`.`);
+	}
+	result.forEach((pathObject) => {
+		if (!pathObject.params) {
+			warn(logging, 'getStaticPaths', `invalid path object. Expected an object with key \`params\`, but got \`${JSON.stringify(pathObject)}\`. Skipped.`);
+			return;
+		}
+		for (const [key, val] of Object.entries(pathObject.params)) {
+			if (!(typeof val === 'undefined' || typeof val === 'string')) {
+				warn(logging, 'getStaticPaths', `invalid path param: ${key}. A string value was expected, but got \`${JSON.stringify(val)}\`.`);
+			}
+			if (val === '') {
+				warn(logging, 'getStaticPaths', `invalid path param: ${key}. \`undefined\` expected for an optional param, but got empty string.`);
+			}
+		}
+	});
+}
diff --git a/packages/astro/src/core/ssr/index.ts b/packages/astro/src/core/ssr/index.ts
deleted file mode 100644
index c4d214a72..000000000
--- a/packages/astro/src/core/ssr/index.ts
+++ /dev/null
@@ -1,300 +0,0 @@
-import type { BuildResult } from 'esbuild';
-import type vite from '../vite';
-import type { AstroConfig, ComponentInstance, Params, Props, Renderer, RouteData, RuntimeMode, SSRElement, SSRError } from '../../@types/astro';
-import { LogOptions, warn } from '../logger.js';
-
-import eol from 'eol';
-import fs from 'fs';
-import path from 'path';
-import { fileURLToPath } from 'url';
-import { renderPage } from '../../runtime/server/index.js';
-import { codeFrame, resolveDependency } from '../util.js';
-import { getStylesForURL } from './css.js';
-import { injectTags } from './html.js';
-import { getParams, validateGetStaticPathsResult } from './routing.js';
-import { createResult } from './result.js';
-import { callGetStaticPaths, findPathItemByKey, RouteCache } from './route-cache.js';
-
-const svelteStylesRE = /svelte\?svelte&type=style/;
-
-interface SSROptions {
-	/** an instance of the AstroConfig */
-	astroConfig: AstroConfig;
-	/** location of file on disk */
-	filePath: URL;
-	/** logging options */
-	logging: LogOptions;
-	/** "development" or "production" */
-	mode: RuntimeMode;
-	/** production website, needed for some RSS & Sitemap functions */
-	origin: string;
-	/** the web request (needed for dynamic routes) */
-	pathname: string;
-	/** optional, in case we need to render something outside of a dev server */
-	route?: RouteData;
-	/** pass in route cache because SSR can’t manage cache-busting */
-	routeCache: RouteCache;
-	/** Vite instance */
-	viteServer: vite.ViteDevServer;
-}
-
-const cache = new Map<string, Promise<Renderer>>();
-
-// TODO: improve validation and error handling here.
-async function resolveRenderer(viteServer: vite.ViteDevServer, renderer: string, astroConfig: AstroConfig) {
-	const resolvedRenderer: any = {};
-	// We can dynamically import the renderer by itself because it shouldn't have
-	// any non-standard imports, the index is just meta info.
-	// The other entrypoints need to be loaded through Vite.
-	const {
-		default: { name, client, polyfills, hydrationPolyfills, server },
-	} = await import(resolveDependency(renderer, astroConfig));
-
-	resolvedRenderer.name = name;
-	if (client) resolvedRenderer.source = path.posix.join(renderer, client);
-	resolvedRenderer.serverEntry = path.posix.join(renderer, server);
-	if (Array.isArray(hydrationPolyfills)) resolvedRenderer.hydrationPolyfills = hydrationPolyfills.map((src: string) => path.posix.join(renderer, src));
-	if (Array.isArray(polyfills)) resolvedRenderer.polyfills = polyfills.map((src: string) => path.posix.join(renderer, src));
-	const { url } = await viteServer.moduleGraph.ensureEntryFromUrl(resolvedRenderer.serverEntry);
-	const { default: rendererSSR } = await viteServer.ssrLoadModule(url);
-	resolvedRenderer.ssr = rendererSSR;
-
-	const completedRenderer: Renderer = resolvedRenderer;
-	return completedRenderer;
-}
-
-async function resolveRenderers(viteServer: vite.ViteDevServer, astroConfig: AstroConfig): Promise<Renderer[]> {
-	const ids: string[] = astroConfig.renderers;
-	const renderers = await Promise.all(
-		ids.map((renderer) => {
-			if (cache.has(renderer)) return cache.get(renderer)!;
-			let promise = resolveRenderer(viteServer, renderer, astroConfig);
-			cache.set(renderer, promise);
-			return promise;
-		})
-	);
-
-	return renderers;
-}
-
-interface ErrorHandlerOptions {
-	filePath: URL;
-	viteServer: vite.ViteDevServer;
-}
-
-async function errorHandler(e: unknown, { viteServer, filePath }: ErrorHandlerOptions) {
-	// normalize error stack line-endings to \n
-	if ((e as any).stack) {
-		(e as any).stack = eol.lf((e as any).stack);
-	}
-
-	// fix stack trace with Vite (this searches its module graph for matches)
-	if (e instanceof Error) {
-		viteServer.ssrFixStacktrace(e);
-	}
-
-	// Astro error (thrown by esbuild so it needs to be formatted for Vite)
-	if (Array.isArray((e as any).errors)) {
-		const { location, pluginName, text } = (e as BuildResult).errors[0];
-		const err = e as SSRError;
-		if (location) err.loc = { file: location.file, line: location.line, column: location.column };
-		let src = err.pluginCode;
-		if (!src && err.id && fs.existsSync(err.id)) src = await fs.promises.readFile(err.id, 'utf8');
-		if (!src) src = await fs.promises.readFile(filePath, 'utf8');
-		err.frame = codeFrame(src, err.loc);
-		err.id = location?.file;
-		err.message = `${location?.file}: ${text}
-${err.frame}
-`;
-		if (pluginName) err.plugin = pluginName;
-		throw err;
-	}
-
-	// Generic error (probably from Vite, and already formatted)
-	throw e;
-}
-
-export type ComponentPreload = [Renderer[], ComponentInstance];
-
-export async function preload({ astroConfig, filePath, viteServer }: SSROptions): Promise<ComponentPreload> {
-	// Important: This needs to happen first, in case a renderer provides polyfills.
-	const renderers = await resolveRenderers(viteServer, astroConfig);
-	// Load the module from the Vite SSR Runtime.
-	const mod = (await viteServer.ssrLoadModule(fileURLToPath(filePath))) as ComponentInstance;
-
-	return [renderers, mod];
-}
-
-export async function getParamsAndProps({ route, routeCache, pathname }: { route: RouteData | undefined; routeCache: RouteCache; pathname: string }): Promise<[Params, Props]> {
-	// Handle dynamic routes
-	let params: Params = {};
-	let pageProps: Props;
-	if (route && !route.pathname) {
-		if (route.params.length) {
-			const paramsMatch = route.pattern.exec(pathname);
-			if (paramsMatch) {
-				params = getParams(route.params)(paramsMatch);
-			}
-		}
-		const routeCacheEntry = routeCache.get(route);
-		if (!routeCacheEntry) {
-			throw new Error(`[${route.component}] Internal error: route cache was empty, but expected to be full.`);
-		}
-		const paramsKey = JSON.stringify(params);
-		const matchedStaticPath = findPathItemByKey(routeCacheEntry.staticPaths, paramsKey);
-		if (!matchedStaticPath) {
-			throw new Error(`[getStaticPaths] route pattern matched, but no matching static path found. (${pathname})`);
-		}
-		// This is written this way for performance; instead of spreading the props
-		// which is O(n), create a new object that extends props.
-		pageProps = Object.create(matchedStaticPath.props || Object.prototype);
-	} else {
-		pageProps = {};
-	}
-	return [params, pageProps];
-}
-
-/** use Vite to SSR */
-export async function render(renderers: Renderer[], mod: ComponentInstance, ssrOpts: SSROptions): Promise<string> {
-	const { astroConfig, filePath, logging, mode, origin, pathname, route, routeCache, viteServer } = ssrOpts;
-
-	// Handle dynamic routes
-	let params: Params = {};
-	let pageProps: Props = {};
-	if (route && !route.pathname) {
-		if (route.params.length) {
-			const paramsMatch = route.pattern.exec(pathname);
-			if (paramsMatch) {
-				params = getParams(route.params)(paramsMatch);
-			}
-		}
-		let routeCacheEntry = routeCache.get(route);
-		// TODO(fks): All of our getStaticPaths logic should live in a single place,
-		// to prevent duplicate runs during the build. This is not expected to run
-		// anymore and we should change this check to thrown an internal error.
-		if (!routeCacheEntry) {
-			warn(logging, 'routeCache', `Internal Warning: getStaticPaths() called twice during the build. (${route.component})`);
-			routeCacheEntry = await callGetStaticPaths(mod, route, true, logging);
-			routeCache.set(route, routeCacheEntry);
-		}
-		const matchedStaticPath = routeCacheEntry.staticPaths.find(({ params: _params }) => JSON.stringify(_params) === JSON.stringify(params));
-		if (!matchedStaticPath) {
-			throw new Error(`[getStaticPaths] route pattern matched, but no matching static path found. (${pathname})`);
-		}
-		pageProps = { ...matchedStaticPath.props } || {};
-	}
-
-	// Validate the page component before rendering the page
-	const Component = await mod.default;
-	if (!Component) throw new Error(`Expected an exported Astro component but received typeof ${typeof Component}`);
-	if (!Component.isAstroComponentFactory) throw new Error(`Unable to SSR non-Astro component (${route?.component})`);
-
-	// Add hoisted script tags
-	const scripts = astroConfig.buildOptions.experimentalStaticBuild
-		? new Set<SSRElement>(
-				Array.from(mod.$$metadata.hoistedScriptPaths()).map((src) => ({
-					props: { type: 'module', src },
-					children: '',
-				}))
-		  )
-		: new Set<SSRElement>();
-
-	// Inject HMR scripts
-	if (mode === 'development' && astroConfig.buildOptions.experimentalStaticBuild) {
-		scripts.add({
-			props: { type: 'module', src: '/@vite/client' },
-			children: '',
-		});
-		scripts.add({
-			props: { type: 'module', src: new URL('../../runtime/client/hmr.js', import.meta.url).pathname },
-			children: '',
-		});
-	}
-
-	const result = createResult({ astroConfig, logging, origin, params, pathname, renderers, scripts });
-	// Resolves specifiers in the inline hydrated scripts, such as "@astrojs/renderer-preact/client.js"
-	result.resolve = async (s: string) => {
-		// The legacy build needs these to remain unresolved so that vite HTML
-		// Can do the resolution. Without this condition the build output will be
-		// broken in the legacy build. This can be removed once the legacy build is removed.
-		if (astroConfig.buildOptions.experimentalStaticBuild) {
-			const [, resolvedPath] = await viteServer.moduleGraph.resolveUrl(s);
-			return resolvedPath;
-		} else {
-			return s;
-		}
-	};
-
-	let html = await renderPage(result, Component, pageProps, null);
-
-	// inject tags
-	const tags: vite.HtmlTagDescriptor[] = [];
-
-	// dev only: inject Astro HMR client
-	if (mode === 'development' && !astroConfig.buildOptions.experimentalStaticBuild) {
-		tags.push({
-			tag: 'script',
-			attrs: { type: 'module' },
-			// HACK: inject the direct contents of our `astro/runtime/client/hmr.js` to ensure
-			// `import.meta.hot` is properly handled by Vite
-			children: await getHmrScript(),
-			injectTo: 'head',
-		});
-	}
-
-	// inject CSS
-	[...getStylesForURL(filePath, viteServer)].forEach((href) => {
-		if (mode === 'development' && svelteStylesRE.test(href)) {
-			tags.push({
-				tag: 'script',
-				attrs: { type: 'module', src: href },
-				injectTo: 'head',
-			});
-		} else {
-			tags.push({
-				tag: 'link',
-				attrs: {
-					rel: 'stylesheet',
-					href,
-					'data-astro-injected': true,
-				},
-				injectTo: 'head',
-			});
-		}
-	});
-
-	// add injected tags
-	html = injectTags(html, tags);
-
-	// run transformIndexHtml() in dev to run Vite dev transformations
-	if (mode === 'development' && !astroConfig.buildOptions.experimentalStaticBuild) {
-		const relativeURL = filePath.href.replace(astroConfig.projectRoot.href, '/');
-		html = await viteServer.transformIndexHtml(relativeURL, html, pathname);
-	}
-
-	// inject <!doctype html> if missing (TODO: is a more robust check needed for comments, etc.?)
-	if (!/<!doctype html/i.test(html)) {
-		html = '<!DOCTYPE html>\n' + html;
-	}
-
-	return html;
-}
-
-let hmrScript: string;
-async function getHmrScript() {
-	if (hmrScript) return hmrScript;
-	const filePath = fileURLToPath(new URL('../../runtime/client/hmr.js', import.meta.url));
-	const content = await fs.promises.readFile(filePath);
-	hmrScript = content.toString();
-	return hmrScript;
-}
-
-export async function ssr(ssrOpts: SSROptions): Promise<string> {
-	try {
-		const [renderers, mod] = await preload(ssrOpts);
-		return await render(renderers, mod, ssrOpts); // note(drew): without "await", errors won’t get caught by errorHandler()
-	} catch (e: unknown) {
-		await errorHandler(e, { viteServer: ssrOpts.viteServer, filePath: ssrOpts.filePath });
-		throw e;
-	}
-}
diff --git a/packages/astro/src/runtime/server/index.ts b/packages/astro/src/runtime/server/index.ts
index 93c908416..e987db5f6 100644
--- a/packages/astro/src/runtime/server/index.ts
+++ b/packages/astro/src/runtime/server/index.ts
@@ -157,7 +157,7 @@ export async function renderComponent(result: SSRResult, displayName: string, Co
 	}
 	const probableRendererNames = guessRenderers(metadata.componentUrl);
 
-	if (Array.isArray(renderers) && renderers.length === 0 && typeof Component !== 'string' && !HTMLElement.isPrototypeOf(Component as object)) {
+	if (Array.isArray(renderers) && renderers.length === 0 && typeof Component !== 'string' && !componentIsHTMLElement(Component)) {
 		const message = `Unable to render ${metadata.displayName}!
 
 There are no \`renderers\` set in your \`astro.config.mjs\` file.
@@ -175,7 +175,7 @@ Did you mean to enable ${formatList(probableRendererNames.map((r) => '`' + r + '
 			}
 		}
 
-		if (!renderer && HTMLElement.isPrototypeOf(Component as object)) {
+		if (!renderer && typeof HTMLElement === 'function' && componentIsHTMLElement(Component)) {
 			const output = renderHTMLElement(result, Component as typeof HTMLElement, _props, slots);
 
 			return output;
@@ -465,6 +465,10 @@ export async function renderAstroComponent(component: InstanceType<typeof AstroC
 	return unescapeHTML(await _render(template));
 }
 
+function componentIsHTMLElement(Component: unknown) {
+	return typeof HTMLElement !== 'undefined' && HTMLElement.isPrototypeOf(Component as object);
+}
+
 export async function renderHTMLElement(result: SSRResult, constructor: typeof HTMLElement, props: any, slots: any) {
 	const name = getHTMLElementName(constructor);
 
diff --git a/packages/astro/src/vite-plugin-astro-server/index.ts b/packages/astro/src/vite-plugin-astro-server/index.ts
index de57e1593..eb08ac8a0 100644
--- a/packages/astro/src/vite-plugin-astro-server/index.ts
+++ b/packages/astro/src/vite-plugin-astro-server/index.ts
@@ -2,17 +2,16 @@ import type vite from '../core/vite';
 import type http from 'http';
 import type { AstroConfig, ManifestData, RouteData } from '../@types/astro';
 import { info, LogOptions } from '../core/logger.js';
-import { fileURLToPath } from 'url';
-import { createRouteManifest, matchRoute } from '../core/ssr/routing.js';
+import { createRouteManifest, matchRoute } from '../core/routing/index.js';
 import mime from 'mime';
 import stripAnsi from 'strip-ansi';
 import { createSafeError } from '../core/util.js';
-import { ssr } from '../core/ssr/index.js';
+import { ssr } from '../core/render/dev/index.js';
 import * as msg from '../core/messages.js';
 
 import notFoundTemplate, { subpathNotUsedTemplate } from '../template/4xx.js';
 import serverErrorTemplate from '../template/5xx.js';
-import { RouteCache } from '../core/ssr/route-cache.js';
+import { RouteCache } from '../core/render/route-cache.js';
 
 interface AstroPluginOptions {
 	config: AstroConfig;
@@ -126,7 +125,6 @@ export default function createPlugin({ config, logging }: AstroPluginOptions): v
 	return {
 		name: 'astro:server',
 		configureServer(viteServer) {
-			const pagesDirectory = fileURLToPath(config.pages);
 			let routeCache = new RouteCache(logging);
 			let manifest: ManifestData = createRouteManifest({ config: config }, logging);
 			/** rebuild the route cache + manifest, as needed. */
diff --git a/packages/astro/src/vite-plugin-astro/styles.ts b/packages/astro/src/vite-plugin-astro/styles.ts
index 6ebcd0e0d..b49ce6e9b 100644
--- a/packages/astro/src/vite-plugin-astro/styles.ts
+++ b/packages/astro/src/vite-plugin-astro/styles.ts
@@ -1,6 +1,6 @@
 import type vite from '../core/vite';
 
-import { STYLE_EXTENSIONS } from '../core/ssr/css.js';
+import { STYLE_EXTENSIONS } from '../core/render/dev/css.js';
 
 export type TransformHook = (code: string, id: string, ssr?: boolean) => Promise<vite.TransformResult>;
 
diff --git a/packages/astro/src/vite-plugin-build-css/index.ts b/packages/astro/src/vite-plugin-build-css/index.ts
index 155fdc8ed..de7933f7d 100644
--- a/packages/astro/src/vite-plugin-build-css/index.ts
+++ b/packages/astro/src/vite-plugin-build-css/index.ts
@@ -1,10 +1,9 @@
-import type { RenderedChunk } from 'rollup';
 import type { BuildInternals } from '../core/build/internal';
 
 import * as path from 'path';
 import esbuild from 'esbuild';
 import { Plugin as VitePlugin } from '../core/vite';
-import { isCSSRequest } from '../core/ssr/css.js';
+import { isCSSRequest } from '../core/render/dev/css.js';
 
 const PLUGIN_NAME = '@astrojs/rollup-plugin-build-css';
 
diff --git a/packages/astro/src/vite-plugin-build-html/index.ts b/packages/astro/src/vite-plugin-build-html/index.ts
index 48bb617c9..87cc46779 100644
--- a/packages/astro/src/vite-plugin-build-html/index.ts
+++ b/packages/astro/src/vite-plugin-build-html/index.ts
@@ -12,10 +12,10 @@ import { getAttribute, hasAttribute, insertBefore, remove, createScript, createE
 import { addRollupInput } from './add-rollup-input.js';
 import { findAssets, findExternalScripts, findInlineScripts, findInlineStyles, getTextContent, getAttributes } from './extract-assets.js';
 import { isBuildableImage, isBuildableLink, isHoistedScript, isInSrcDirectory, hasSrcSet } from './util.js';
-import { render as ssrRender } from '../core/ssr/index.js';
+import { render as ssrRender } from '../core/render/dev/index.js';
 import { getAstroStyleId, getAstroPageStyleId } from '../vite-plugin-build-css/index.js';
 import { prependDotSlash, removeEndingForwardSlash } from '../core/path.js';
-import { RouteCache } from '../core/ssr/route-cache.js';
+import { RouteCache } from '../core/render/route-cache.js';
 
 // This package isn't real ESM, so have to coerce it
 const matchSrcset: typeof srcsetParse = (srcsetParse as any).default;
diff --git a/packages/astro/test/route-manifest.test.js b/packages/astro/test/route-manifest.test.js
index 730bc72b4..2432b0327 100644
--- a/packages/astro/test/route-manifest.test.js
+++ b/packages/astro/test/route-manifest.test.js
@@ -1,6 +1,6 @@
 import { expect } from 'chai';
 import { fileURLToPath } from 'url';
-import { createRouteManifest } from '../dist/core/ssr/routing.js';
+import { createRouteManifest } from '../dist/core/routing/index.js';
 
 const cwd = new URL('./fixtures/route-manifest/', import.meta.url);
 
diff --git a/scripts/smoke/index.js b/scripts/smoke/index.js
index 8c3f27ae9..8a0cf2242 100644
--- a/scripts/smoke/index.js
+++ b/scripts/smoke/index.js
@@ -3,6 +3,7 @@
 import fs from 'fs';
 import { execa } from 'execa';
 import { fileURLToPath } from 'url';
+import path from 'path';
 
 // NOTE: Only needed for Windows, due to a Turbo bug.
 // Once Turbo works on Windows, we can remove this script
diff --git a/yarn.lock b/yarn.lock
index 4178e138e..1b7b066ed 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -160,6 +160,11 @@
   resolved "https://registry.yarnpkg.com/@astropub/webapi/-/webapi-0.10.11.tgz#7cf3926bb24f474b344025fa437d08fa71d0a6b9"
   integrity sha512-i1Aw6Px3n+x0GGbZxoQc6bY2gxks//rPUwuX4ICuNai8GvK/6j/0OGMVkD3ZlVJ/zfUtds8BDx/k+TJYaAPlKQ==
 
+"@astropub/webapi@^0.10.13":
+  version "0.10.13"
+  resolved "https://registry.yarnpkg.com/@astropub/webapi/-/webapi-0.10.13.tgz#28f95706d1e9041495347465fb347eb78035cdd7"
+  integrity sha512-efUVnq9IWPHYl5nxSLkDZzp1RvNmKpYApcHhgQnN2A+4D8z6dnTYlXo5Ogl0aAJWMMBKN89Q2GJwDF0zy8Lonw==
+
 "@babel/code-frame@^7.0.0", "@babel/code-frame@^7.10.4", "@babel/code-frame@^7.16.7":
   version "7.16.7"
   resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.16.7.tgz#44416b6bd7624b998f5b1af5d470856c40138789"
@@ -6572,16 +6577,11 @@ preact-render-to-string@^5.1.19:
   dependencies:
     pretty-format "^3.8.0"
 
-preact@^10.6.5:
+preact@^10.6.5, preact@~10.6.5:
   version "10.6.5"
   resolved "https://registry.yarnpkg.com/preact/-/preact-10.6.5.tgz#726d8bd12903a0d51cdd17e2e1b90cc539403e0c"
   integrity sha512-i+LXM6JiVjQXSt2jG2vZZFapGpCuk1fl8o6ii3G84MA3xgj686FKjs4JFDkmUVhtxyq21+4ay74zqPykz9hU6w==
 
-preact@~10.5.15:
-  version "10.5.15"
-  resolved "https://registry.yarnpkg.com/preact/-/preact-10.5.15.tgz#6df94d8afecf3f9e10a742fd8c362ddab464225f"
-  integrity sha512-5chK29n6QcJc3m1lVrKQSQ+V7K1Gb8HeQY6FViQ5AxCAEGu3DaHffWNDkC9+miZgsLvbvU9rxbV1qinGHMHzqA==
-
 prebuild-install@^7.0.0:
   version "7.0.1"
   resolved "https://registry.yarnpkg.com/prebuild-install/-/prebuild-install-7.0.1.tgz#c10075727c318efe72412f333e0ef625beaf3870"