diff --git a/README.md b/README.md
index 6a92957..9f07653 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ browser-language redirect; readers switch from the header language menu.
 - Long Chinese headings may use `\u200b` to mark where they are allowed to
   wrap; headings otherwise break only at spaces and punctuation.
 - To add a locale: add it to `src/lib/locales.ts`, add a content file, add the
-  path to `prerender.entries` in `svelte.config.js`, add its share-image file
+  path to `prerender.entries` in `vite.config.ts`, add its share-image file
   in `src/lib/seo.ts`, regenerate the PNGs with
   `swift scripts/share-cards/render.swift` on macOS, and extend
   `scripts/verify-build.mjs`. The sitemap is generated from the locale list.
diff --git a/package.json b/package.json
index cbf6aec..a665f33 100644
--- a/package.json
+++ b/package.json
@@ -11,8 +11,8 @@
 		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json"
   },
   "devDependencies": {
-    "@sveltejs/adapter-static": "^3.0.10",
-    "@sveltejs/kit": "^2.70.3",
+    "@sveltejs/adapter-static": "^4.0.0",
+    "@sveltejs/kit": "^3.0.1",
     "@sveltejs/vite-plugin-svelte": "^7.3.1",
     "@tailwindcss/vite": "^4.3.3",
     "svelte": "^5.57.2",
@@ -21,5 +21,9 @@
     "typescript": "^6.0.3",
     "vite": "^8.3.4",
     "vitest": "^5.0.3"
+  },
+  "imports": {
+    "#lib": "./src/lib/index.js",
+    "#lib/*": "./src/lib/*"
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a2e6e1f..9112a2f 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -9,11 +9,11 @@ importers:
   .:
     devDependencies:
       '@sveltejs/adapter-static':
-        specifier: ^3.0.10
-        version: 3.0.10(@sveltejs/kit@2.70.3(@sveltejs/vite-plugin-svelte@7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0)))(svelte@5.57.2)(typescript@6.0.3)(vite@8.3.4(jiti@2.7.0)))
+        specifier: ^4.0.0
+        version: 4.0.0(@sveltejs/kit@3.0.1(@sveltejs/vite-plugin-svelte@7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0)))(svelte@5.57.2)(typescript@6.0.3)(vite@8.3.4(jiti@2.7.0)))
       '@sveltejs/kit':
-        specifier: ^2.70.3
-        version: 2.70.3(@sveltejs/vite-plugin-svelte@7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0)))(svelte@5.57.2)(typescript@6.0.3)(vite@8.3.4(jiti@2.7.0))
+        specifier: ^3.0.1
+        version: 3.0.1(@sveltejs/vite-plugin-svelte@7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0)))(svelte@5.57.2)(typescript@6.0.3)(vite@8.3.4(jiti@2.7.0))
       '@sveltejs/vite-plugin-svelte':
         specifier: ^7.3.1
         version: 7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0))
@@ -173,21 +173,21 @@ packages:
     peerDependencies:
       acorn: ^8.9.0
 
-  '@sveltejs/adapter-static@3.0.10':
-    resolution: {integrity: sha512-7D9lYFWJmB7zxZyTE/qxjksvMqzMuYrrsyh1f4AlZqeZeACPRySjbC3aFiY55wb1tWUaKOQG9PVbm74JcN2Iew==}
+  '@sveltejs/adapter-static@4.0.0':
+    resolution: {integrity: sha512-aF1J23R1ebKqUxQ4/qLr/Lxu63NFmLAtg8UZl3HFLxaoA1D/nhTVGcD9lTqx65iUbjNR2iOL0TgOxSX82x6Paw==}
     peerDependencies:
-      '@sveltejs/kit': ^2.0.0
+      '@sveltejs/kit': ^3.0.0-next.0
 
-  '@sveltejs/kit@2.70.3':
-    resolution: {integrity: sha512-UDvEYuZqAMbfB/oXIoqKvbKcb7YczK5zYrzmsGV1zRJk03jntwp8dXiYoIJotxAndsKvcPFtx9H1GRSKFdSHgg==}
-    engines: {node: '>=18.13'}
+  '@sveltejs/kit@3.0.1':
+    resolution: {integrity: sha512-8JMCCq7ZUJELi3hbhb0+c9Rs8qnbHW90vhOfM+t1FSF4fhIpG9/FOsH4IYgcITMhbdkSrrn+Kvd9G+q8A+UO6Q==}
+    engines: {node: '>=22.17'}
     hasBin: true
     peerDependencies:
       '@opentelemetry/api': ^1.0.0
-      '@sveltejs/vite-plugin-svelte': ^3.0.0 || ^4.0.0-next.1 || ^5.0.0 || ^6.0.0-next.0 || ^7.0.0
-      svelte: ^4.0.0 || ^5.0.0-next.0
-      typescript: ^5.3.3 || ^6.0.0
-      vite: ^5.0.3 || ^6.0.0 || ^7.0.0-beta.0 || ^8.0.0
+      '@sveltejs/vite-plugin-svelte': ^7.0.0
+      svelte: ^5.57.1
+      typescript: ^6.0.0
+      vite: ^8.0.12
     peerDependenciesMeta:
       '@opentelemetry/api':
         optional: true
@@ -302,9 +302,6 @@ packages:
   '@types/chai@5.2.3':
     resolution: {integrity: sha512-Mw558oeA9fFbv65/y4mHtXDs9bPnFMZAL/jxdPFUpOHHIXX91mcgEHbS5Lahr+pwZFR8A7GQleRWeI6cGFC2UA==}
 
-  '@types/cookie@0.6.0':
-    resolution: {integrity: sha512-4Kh9a6B2bQciAhf7FSuMRRkUWecJgJu9nPnx3yzpsfXX/c50REIqpHY4C82bXP90qrLtXtkDxTZosYO3UpOwlA==}
-
   '@types/deep-eql@4.0.2':
     resolution: {integrity: sha512-c9h9dVVMigMPc4bwTvC5dxqtqJZwQPePsWjPlpSOnojbor6pGqdk541lfA7AqFQr5pB1BRdq0juY9db81BwyFw==}
 
@@ -354,9 +351,9 @@ packages:
     resolution: {integrity: sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA==}
     engines: {node: '>=6'}
 
-  cookie@0.6.0:
-    resolution: {integrity: sha512-U71cyTamuh1CRNCfpGY6to28lxvNwPG4Guz/EVjgf3Jmzv0vlDp1atT9eS5dDjMYHucpHbWns6Lwf3BKz6svdw==}
-    engines: {node: '>= 0.6'}
+  cookie@2.0.1:
+    resolution: {integrity: sha512-yuToqVvRrj6pfDXREyQAAv8SkAEk/8GS3jQRTiUMm66TVtBYmqQeoEjL2Lmq8Rpo6271vH76InTChTitEAm65w==}
+    engines: {node: '>=22'}
 
   deepmerge@4.3.1:
     resolution: {integrity: sha512-3sUqbMEc77XqpdNO7FRyRog+eW3ph+GYCbj+rK+uYyRMuwsVy0rMiVtPn+QJlKFvWP/1PYpapqYn0Me2knFn+A==}
@@ -366,12 +363,12 @@ packages:
     resolution: {integrity: sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ==}
     engines: {node: '>=8'}
 
-  devalue@5.9.1:
-    resolution: {integrity: sha512-+17vil3EVQRzvtDJSFuTWEb8XJRvXqAiV3qZyQWD398QeXUa6CxsUyMdD1fxzEhUrd4FojitFz7lhIHBTlV4fw==}
-
   devalue@5.9.2:
     resolution: {integrity: sha512-po4PAY5c53tw5XMocSnf8A/5OHhbbUftpr93aEN6BBoAdntUmK7vu7wOATqvt7cXO7m1Cl4gMVn6p7n6n4mj0w==}
 
+  devalue@5.9.4:
+    resolution: {integrity: sha512-sPAT4pztbu6586/hrhOnMKS17IJrvg12mXiSPSS3W5qDeN2RGgvZ0diZCm31dBbnevfVmujNO3IM2wrS4Y2Rhg==}
+
   enhanced-resolve@5.24.5:
     resolution: {integrity: sha512-L1l8TNvomm6UVW5B253AGxQagSQr+vGwhMlrrfRS2qmhx46AMpMVJKQYLvWYbysTMY8VoicOvzHzoHMbyzB+4A==}
     engines: {node: '>=10.13.0'}
@@ -421,10 +418,6 @@ packages:
     resolution: {integrity: sha512-AC/7JofJvZGrrneWNaEnJeOLUx+JlGt7tNa0wZiRPT4MY1wmfKjt2+6O2p2uz2+skll8OZZmJMNqeke7kKbNgQ==}
     hasBin: true
 
-  kleur@4.1.5:
-    resolution: {integrity: sha512-o+NO+8WrRiQEE4/7nwRJhN1HWpVmJm511pBHUxPLtp0BUISzlBplORYSmTclCnJvQq2tKu/sgl3xVpkc7ZWuQQ==}
-    engines: {node: '>=6'}
-
   lightningcss-android-arm64@1.32.0:
     resolution: {integrity: sha512-YK7/ClTt4kAK0vo6w3X+Pnm0D2cf2vPHbhOXdoNti1Ga0al1P4TBZhwjATvjNwLEBCnKvjJc2jQgHXH0NEwlAg==}
     engines: {node: '>= 12.0.0'}
@@ -626,9 +619,6 @@ packages:
     resolution: {integrity: sha512-xal3CZX1Xlo/k4ApwCFrHVACi9fBqJ7V+mwhBsuf/1IOKbBy098Fex+Wa/5QMubw09pSZ/u8EY8PWgevJsXp1A==}
     engines: {node: '>=6'}
 
-  set-cookie-parser@3.1.2:
-    resolution: {integrity: sha512-5/r/lTwbJ3zQ+qwdUFZYeRNqda7P5HD8zQKqlSjdGt1/S0cjLAphHusj4Y58ahDtWn/g32xrIS58/ikOvwl0Lw==}
-
   sirv@3.0.2:
     resolution: {integrity: sha512-2wcC/oGxHis/BoHkkPwldgiPSYcpZK3JU28WoMVv55yHJgcZ8rlXvuG9iZggz+sU1d4bRgIGASwyWqjxu3FM0g==}
     engines: {node: '>=18'}
@@ -864,24 +854,20 @@ snapshots:
     dependencies:
       acorn: 8.18.0
 
-  '@sveltejs/adapter-static@3.0.10(@sveltejs/kit@2.70.3(@sveltejs/vite-plugin-svelte@7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0)))(svelte@5.57.2)(typescript@6.0.3)(vite@8.3.4(jiti@2.7.0)))':
+  '@sveltejs/adapter-static@4.0.0(@sveltejs/kit@3.0.1(@sveltejs/vite-plugin-svelte@7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0)))(svelte@5.57.2)(typescript@6.0.3)(vite@8.3.4(jiti@2.7.0)))':
     dependencies:
-      '@sveltejs/kit': 2.70.3(@sveltejs/vite-plugin-svelte@7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0)))(svelte@5.57.2)(typescript@6.0.3)(vite@8.3.4(jiti@2.7.0))
+      '@sveltejs/kit': 3.0.1(@sveltejs/vite-plugin-svelte@7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0)))(svelte@5.57.2)(typescript@6.0.3)(vite@8.3.4(jiti@2.7.0))
 
-  '@sveltejs/kit@2.70.3(@sveltejs/vite-plugin-svelte@7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0)))(svelte@5.57.2)(typescript@6.0.3)(vite@8.3.4(jiti@2.7.0))':
+  '@sveltejs/kit@3.0.1(@sveltejs/vite-plugin-svelte@7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0)))(svelte@5.57.2)(typescript@6.0.3)(vite@8.3.4(jiti@2.7.0))':
     dependencies:
+      '@rolldown/pluginutils': 1.0.1
       '@standard-schema/spec': 1.1.0
-      '@sveltejs/acorn-typescript': 1.0.13(acorn@8.18.0)
       '@sveltejs/vite-plugin-svelte': 7.3.1(svelte@5.57.2)(vite@8.3.4(jiti@2.7.0))
-      '@types/cookie': 0.6.0
-      acorn: 8.18.0
-      cookie: 0.6.0
-      devalue: 5.9.1
+      cookie: 2.0.1
+      devalue: 5.9.4
       esm-env: 1.2.2
-      kleur: 4.1.5
-      magic-string: 0.30.21
+      magic-string: 1.4.2
       mrmime: 2.0.1
-      set-cookie-parser: 3.1.2
       sirv: 3.0.2
       svelte: 5.57.2
       vite: 8.3.4(jiti@2.7.0)
@@ -972,8 +958,6 @@ snapshots:
       '@types/deep-eql': 4.0.2
       assertion-error: 2.0.1
 
-  '@types/cookie@0.6.0': {}
-
   '@types/deep-eql@4.0.2': {}
 
   '@types/estree@1.0.9': {}
@@ -1005,16 +989,16 @@ snapshots:
 
   clsx@2.1.1: {}
 
-  cookie@0.6.0: {}
+  cookie@2.0.1: {}
 
   deepmerge@4.3.1: {}
 
   detect-libc@2.1.2: {}
 
-  devalue@5.9.1: {}
-
   devalue@5.9.2: {}
 
+  devalue@5.9.4: {}
+
   enhanced-resolve@5.24.5:
     dependencies:
       graceful-fs: 4.2.11
@@ -1049,8 +1033,6 @@ snapshots:
 
   jiti@2.7.0: {}
 
-  kleur@4.1.5: {}
-
   lightningcss-android-arm64@1.32.0:
     optional: true
 
@@ -1208,8 +1190,6 @@ snapshots:
     dependencies:
       mri: 1.2.0
 
-  set-cookie-parser@3.1.2: {}
-
   sirv@3.0.2:
     dependencies:
       '@polka/url': 1.0.0-next.29
diff --git a/src/app.css b/src/app.css
index 1588096..1806f79 100644
--- a/src/app.css
+++ b/src/app.css
@@ -295,7 +295,7 @@
 	}
 }
 
-/* Scroll reveal (see $lib/reveal.ts). Elements start hidden only once JS is
+/* Scroll reveal (see #lib/reveal.ts). Elements start hidden only once JS is
    known to run; the fallback animation shows them if hydration never lands. */
 :root[data-js] [data-reveal]:not([data-revealed]) {
 	opacity: 0;
diff --git a/src/app.d.ts b/src/app.d.ts
index 683c27a..ef3f68f 100644
--- a/src/app.d.ts
+++ b/src/app.d.ts
@@ -1,6 +1,6 @@
 /// <reference types="@sveltejs/kit" />
 
-import type { Locale } from '$lib/locales';
+import type { Locale } from '#lib/locales.js';
 
 declare global {
 	namespace App {
diff --git a/src/hooks.server.ts b/src/hooks.server.ts
index db10bce..61addc7 100644
--- a/src/hooks.server.ts
+++ b/src/hooks.server.ts
@@ -1,5 +1,5 @@
-import type { Handle } from '@sveltejs/kit';
-import { localeFromPath, localeInfo } from '$lib/locales';
+import type { Handle } from '@sveltejs/kit/hooks';
+import { localeFromPath, localeInfo } from '#lib/locales.js';
 
 // Runs while prerendering, so each static page ships with its own `lang`.
 export const handle: Handle = ({ event, resolve }) => {
diff --git a/src/lib/components/AgentsSection.svelte b/src/lib/components/AgentsSection.svelte
index 91859e8..9f41877 100644
--- a/src/lib/components/AgentsSection.svelte
+++ b/src/lib/components/AgentsSection.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
-	import { reveal } from '$lib/reveal';
+	import { reveal } from '#lib/reveal.js';
 	import Section from './Section.svelte';
-	import { currentMessages } from '$lib/content';
+	import { currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages());
 	const agents = $derived(t.agents);
diff --git a/src/lib/components/CopyButton.svelte b/src/lib/components/CopyButton.svelte
index 4069972..d24e707 100644
--- a/src/lib/components/CopyButton.svelte
+++ b/src/lib/components/CopyButton.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-	import { currentMessages } from '$lib/content';
+	import { currentMessages } from '#lib/content/index.js';
 
 	let { text, label }: { text: string; label?: string } = $props();
 
diff --git a/src/lib/components/FeaturesSection.svelte b/src/lib/components/FeaturesSection.svelte
index d1b8994..f9b3dfa 100644
--- a/src/lib/components/FeaturesSection.svelte
+++ b/src/lib/components/FeaturesSection.svelte
@@ -1,8 +1,8 @@
 <script lang="ts">
-	import { reveal } from '$lib/reveal';
+	import { reveal } from '#lib/reveal.js';
 	import Section from './Section.svelte';
-	import { examples } from '$lib/site';
-	import { currentLocale, currentMessages } from '$lib/content';
+	import { examples } from '#lib/site.js';
+	import { currentLocale, currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages());
 	const locale = $derived(currentLocale());
diff --git a/src/lib/components/Footer.svelte b/src/lib/components/Footer.svelte
index 34c1590..1f7bb52 100644
--- a/src/lib/components/Footer.svelte
+++ b/src/lib/components/Footer.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
 	import Wordmark from './Wordmark.svelte';
-	import { repos, site } from '$lib/site';
-	import { currentMessages } from '$lib/content';
+	import { repos, site } from '#lib/site.js';
+	import { currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages());
 </script>
diff --git a/src/lib/components/Header.svelte b/src/lib/components/Header.svelte
index 3d194ce..08c0dbe 100644
--- a/src/lib/components/Header.svelte
+++ b/src/lib/components/Header.svelte
@@ -6,9 +6,9 @@
 	import Wordmark from './Wordmark.svelte';
 	import ThemeSwitcher from './ThemeSwitcher.svelte';
 	import LanguageSwitcher from './LanguageSwitcher.svelte';
-	import { navSections, pageSections, site } from '$lib/site';
-	import { localePath } from '$lib/locales';
-	import { currentLocale, currentMessages } from '$lib/content';
+	import { navSections, pageSections, site } from '#lib/site.js';
+	import { localePath } from '#lib/locales.js';
+	import { currentLocale, currentMessages } from '#lib/content/index.js';
 	import { page } from '$app/state';
 
 	const t = $derived(currentMessages());
diff --git a/src/lib/components/Hero.svelte b/src/lib/components/Hero.svelte
index a1538f8..2a4f35a 100644
--- a/src/lib/components/Hero.svelte
+++ b/src/lib/components/Hero.svelte
@@ -1,9 +1,9 @@
 <script lang="ts">
-	import { reveal } from '$lib/reveal';
+	import { reveal } from '#lib/reveal.js';
 	import Terminal from './Terminal.svelte';
 	import CopyButton from './CopyButton.svelte';
-	import { quickInstall, site } from '$lib/site';
-	import { currentMessages } from '$lib/content';
+	import { quickInstall, site } from '#lib/site.js';
+	import { currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages());
 </script>
diff --git a/src/lib/components/InstallSection.svelte b/src/lib/components/InstallSection.svelte
index 2eaf2d8..7e94571 100644
--- a/src/lib/components/InstallSection.svelte
+++ b/src/lib/components/InstallSection.svelte
@@ -1,10 +1,10 @@
 <script lang="ts">
-	import { reveal } from '$lib/reveal';
+	import { reveal } from '#lib/reveal.js';
 	import { onMount, tick } from 'svelte';
 	import Section from './Section.svelte';
 	import CopyButton from './CopyButton.svelte';
-	import { installTargets as targets, site, type InstallTargetId as TargetId } from '$lib/site';
-	import { currentMessages } from '$lib/content';
+	import { installTargets as targets, site, type InstallTargetId as TargetId } from '#lib/site.js';
+	import { currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages());
 	const install = $derived(t.install);
diff --git a/src/lib/components/LanguageSwitcher.svelte b/src/lib/components/LanguageSwitcher.svelte
index 43a7fb9..8fc0895 100644
--- a/src/lib/components/LanguageSwitcher.svelte
+++ b/src/lib/components/LanguageSwitcher.svelte
@@ -3,8 +3,8 @@
 	import { scale } from 'svelte/transition';
 	import { cubicOut } from 'svelte/easing';
 	import { prefersReducedMotion } from 'svelte/motion';
-	import { localeInfo, localePath, locales } from '$lib/locales';
-	import { currentLocale, currentMessages } from '$lib/content';
+	import { localeInfo, localePath, locales } from '#lib/locales.js';
+	import { currentLocale, currentMessages } from '#lib/content/index.js';
 
 	let {
 		variant = 'menu',
diff --git a/src/lib/components/LanguagesSection.svelte b/src/lib/components/LanguagesSection.svelte
index 75f0657..6b4498a 100644
--- a/src/lib/components/LanguagesSection.svelte
+++ b/src/lib/components/LanguagesSection.svelte
@@ -1,8 +1,8 @@
 <script lang="ts">
-	import { reveal } from '$lib/reveal';
+	import { reveal } from '#lib/reveal.js';
 	import Section from './Section.svelte';
-	import { languages, type SupportTone } from '$lib/site';
-	import { currentMessages } from '$lib/content';
+	import { languages, type SupportTone } from '#lib/site.js';
+	import { currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages());
 	const copy = $derived(t.languages);
diff --git a/src/lib/components/PageHead.svelte b/src/lib/components/PageHead.svelte
index 5ff78d2..ec079e4 100644
--- a/src/lib/components/PageHead.svelte
+++ b/src/lib/components/PageHead.svelte
@@ -1,8 +1,8 @@
 <script lang="ts">
-	import { site } from '$lib/site';
-	import { defaultLocale, localeInfo, locales } from '$lib/locales';
-	import { currentLocale } from '$lib/content';
-	import { pageUrl, shareImage, shareImageUrl, structuredDataJson } from '$lib/seo';
+	import { site } from '#lib/site.js';
+	import { defaultLocale, localeInfo, locales } from '#lib/locales.js';
+	import { currentLocale } from '#lib/content/index.js';
+	import { pageUrl, shareImage, shareImageUrl, structuredDataJson } from '#lib/seo.js';
 
 	let {
 		title,
diff --git a/src/lib/components/ResultsTable.svelte b/src/lib/components/ResultsTable.svelte
index 368fead..d7a9440 100644
--- a/src/lib/components/ResultsTable.svelte
+++ b/src/lib/components/ResultsTable.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
-	import { rankAgents, tiedWithTop, tracks, type Results } from '$lib/bench';
-	import type { Messages } from '$lib/content/types';
+	import { rankAgents, tiedWithTop, tracks, type Results } from '#lib/bench.js';
+	import type { Messages } from '#lib/content/types.js';
 
 	let { results, t }: { results: Results; t: Messages['results'] } = $props();
 
diff --git a/src/lib/components/Section.svelte b/src/lib/components/Section.svelte
index aa3c075..35c1860 100644
--- a/src/lib/components/Section.svelte
+++ b/src/lib/components/Section.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-	import { reveal } from '$lib/reveal';
+	import { reveal } from '#lib/reveal.js';
 	import type { Snippet } from 'svelte';
 
 	let {
diff --git a/src/lib/components/StartSection.svelte b/src/lib/components/StartSection.svelte
index 1c4e7e8..00c7b49 100644
--- a/src/lib/components/StartSection.svelte
+++ b/src/lib/components/StartSection.svelte
@@ -1,9 +1,9 @@
 <script lang="ts">
-	import { reveal } from '$lib/reveal';
+	import { reveal } from '#lib/reveal.js';
 	import Section from './Section.svelte';
 	import CopyButton from './CopyButton.svelte';
-	import { startSteps } from '$lib/site';
-	import { currentMessages } from '$lib/content';
+	import { startSteps } from '#lib/site.js';
+	import { currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages());
 </script>
diff --git a/src/lib/components/Terminal.svelte b/src/lib/components/Terminal.svelte
index 5299a25..a89d245 100644
--- a/src/lib/components/Terminal.svelte
+++ b/src/lib/components/Terminal.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
-	import { reveal } from '$lib/reveal';
-	import { terminalLines } from '$lib/site';
-	import { currentMessages } from '$lib/content';
+	import { reveal } from '#lib/reveal.js';
+	import { terminalLines } from '#lib/site.js';
+	import { currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages());
 
diff --git a/src/lib/components/ThemeSwitcher.svelte b/src/lib/components/ThemeSwitcher.svelte
index 3f6267e..4e38198 100644
--- a/src/lib/components/ThemeSwitcher.svelte
+++ b/src/lib/components/ThemeSwitcher.svelte
@@ -1,8 +1,8 @@
 <script lang="ts">
 	import { onMount } from 'svelte';
-	import { theme, initTheme, setTheme, type ThemePreference } from '$lib/theme.svelte';
+	import { theme, initTheme, setTheme, type ThemePreference } from '#lib/theme.svelte.js';
 
-	import { currentMessages } from '$lib/content';
+	import { currentMessages } from '#lib/content/index.js';
 
 	let { labelled = false }: { labelled?: boolean } = $props();
 
diff --git a/src/lib/components/ToolingSection.svelte b/src/lib/components/ToolingSection.svelte
index 56d0423..f59e71c 100644
--- a/src/lib/components/ToolingSection.svelte
+++ b/src/lib/components/ToolingSection.svelte
@@ -1,8 +1,8 @@
 <script lang="ts">
-	import { reveal } from '$lib/reveal';
+	import { reveal } from '#lib/reveal.js';
 	import Section from './Section.svelte';
-	import { tooling } from '$lib/site';
-	import { currentMessages } from '$lib/content';
+	import { tooling } from '#lib/site.js';
+	import { currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages());
 </script>
diff --git a/src/lib/components/Wordmark.svelte b/src/lib/components/Wordmark.svelte
index ad011e6..9cc2dea 100644
--- a/src/lib/components/Wordmark.svelte
+++ b/src/lib/components/Wordmark.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
 	import Mark from './Mark.svelte';
-	import { localePath } from '$lib/locales';
-	import { currentLocale, currentMessages } from '$lib/content';
+	import { localePath } from '#lib/locales.js';
+	import { currentLocale, currentMessages } from '#lib/content/index.js';
 
 	let { compact = false }: { compact?: boolean } = $props();
 
diff --git a/src/lib/content/en.ts b/src/lib/content/en.ts
index 207df4e..d8fd653 100644
--- a/src/lib/content/en.ts
+++ b/src/lib/content/en.ts
@@ -1,4 +1,4 @@
-import { site } from '$lib/site';
+import { site } from '#lib/site.js';
 import type { Messages } from './types';
 
 const en: Messages = {
diff --git a/src/lib/content/index.ts b/src/lib/content/index.ts
index 7c63a70..d935ff9 100644
--- a/src/lib/content/index.ts
+++ b/src/lib/content/index.ts
@@ -1,5 +1,5 @@
 import { page } from '$app/state';
-import { defaultLocale, isLocale, type Locale } from '$lib/locales';
+import { defaultLocale, isLocale, type Locale } from '#lib/locales.js';
 import type { Messages } from './types';
 import en from './en';
 import zhCN from './zh-CN';
diff --git a/src/lib/content/types.ts b/src/lib/content/types.ts
index 06202c3..b2ae92c 100644
--- a/src/lib/content/types.ts
+++ b/src/lib/content/types.ts
@@ -1,5 +1,5 @@
-import type { Track } from '$lib/bench';
-import type { ThemePreference } from '$lib/theme.svelte';
+import type { Track } from '#lib/bench.js';
+import type { ThemePreference } from '#lib/theme.svelte.js';
 import type {
 	ExampleId,
 	InstallTargetId,
@@ -7,7 +7,7 @@ import type {
 	NavSection,
 	StartStepId,
 	ToolingId
-} from '$lib/site';
+} from '#lib/site.js';
 
 type Tuple<T, N extends number, R extends T[] = []> = R['length'] extends N
 	? readonly [...R]
@@ -25,7 +25,7 @@ interface SectionCopy {
 
 /**
  * The complete copy for one locale. Keyed records and fixed-length tuples keep
- * every locale structurally aligned with the shared data in `$lib/site`, so a
+ * every locale structurally aligned with the shared data in `#lib/site.js`, so a
  * translation cannot silently drop or add a claim.
  */
 export interface Messages {
diff --git a/src/lib/content/zh-CN.ts b/src/lib/content/zh-CN.ts
index 56f6632..1e86bef 100644
--- a/src/lib/content/zh-CN.ts
+++ b/src/lib/content/zh-CN.ts
@@ -1,4 +1,4 @@
-import { site } from '$lib/site';
+import { site } from '#lib/site.js';
 import type { Messages } from './types';
 
 /*
diff --git a/src/params.ts b/src/params.ts
new file mode 100644
index 0000000..ba17d5a
--- /dev/null
+++ b/src/params.ts
@@ -0,0 +1,9 @@
+import { defineParams } from '@sveltejs/kit/params';
+import { defaultLocale, isLocale, type Locale } from '#lib/locales.ts';
+
+// The default locale is served at `/`, so `/en` must not become a duplicate page.
+const matchLocale = (param: string): param is Exclude<Locale, typeof defaultLocale> => isLocale(param) && param !== defaultLocale;
+
+export const params = defineParams({
+	locale: (param) => (matchLocale(param) ? param : undefined)
+});
diff --git a/src/params/locale.ts b/src/params/locale.ts
deleted file mode 100644
index ae46efd..0000000
--- a/src/params/locale.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-import type { ParamMatcher } from '@sveltejs/kit';
-import { defaultLocale, isLocale, type Locale } from '$lib/locales';
-
-// The default locale is served at `/`, so `/en` must not become a duplicate page.
-export const match = ((param: string): param is Exclude<Locale, typeof defaultLocale> =>
-	isLocale(param) && param !== defaultLocale) satisfies ParamMatcher;
diff --git a/src/routes/[[lang=locale]]/+layout.svelte b/src/routes/[[lang=locale]]/+layout.svelte
index f70c134..72a3213 100644
--- a/src/routes/[[lang=locale]]/+layout.svelte
+++ b/src/routes/[[lang=locale]]/+layout.svelte
@@ -1,10 +1,10 @@
 <script lang="ts">
 	import '../../app.css';
 	import type { Snippet } from 'svelte';
-	import Header from '$lib/components/Header.svelte';
-	import Footer from '$lib/components/Footer.svelte';
-	import { localeInfo } from '$lib/locales';
-	import { currentLocale, currentMessages } from '$lib/content';
+	import Header from '#lib/components/Header.svelte';
+	import Footer from '#lib/components/Footer.svelte';
+	import { localeInfo } from '#lib/locales.js';
+	import { currentLocale, currentMessages } from '#lib/content/index.js';
 
 	let { children }: { children: Snippet } = $props();
 
diff --git a/src/routes/[[lang=locale]]/+layout.ts b/src/routes/[[lang=locale]]/+layout.ts
index f7bfaf1..ce18131 100644
--- a/src/routes/[[lang=locale]]/+layout.ts
+++ b/src/routes/[[lang=locale]]/+layout.ts
@@ -1,4 +1,4 @@
-import { defaultLocale } from '$lib/locales';
+import { defaultLocale } from '#lib/locales.js';
 import type { LayoutLoad } from './$types';
 
 export const prerender = true;
diff --git a/src/routes/[[lang=locale]]/+page.svelte b/src/routes/[[lang=locale]]/+page.svelte
index 576feae..3194296 100644
--- a/src/routes/[[lang=locale]]/+page.svelte
+++ b/src/routes/[[lang=locale]]/+page.svelte
@@ -1,13 +1,13 @@
 <script lang="ts">
-	import Hero from '$lib/components/Hero.svelte';
-	import StartSection from '$lib/components/StartSection.svelte';
-	import FeaturesSection from '$lib/components/FeaturesSection.svelte';
-	import ToolingSection from '$lib/components/ToolingSection.svelte';
-	import AgentsSection from '$lib/components/AgentsSection.svelte';
-	import LanguagesSection from '$lib/components/LanguagesSection.svelte';
-	import InstallSection from '$lib/components/InstallSection.svelte';
-	import PageHead from '$lib/components/PageHead.svelte';
-	import { currentMessages } from '$lib/content';
+	import Hero from '#lib/components/Hero.svelte';
+	import StartSection from '#lib/components/StartSection.svelte';
+	import FeaturesSection from '#lib/components/FeaturesSection.svelte';
+	import ToolingSection from '#lib/components/ToolingSection.svelte';
+	import AgentsSection from '#lib/components/AgentsSection.svelte';
+	import LanguagesSection from '#lib/components/LanguagesSection.svelte';
+	import InstallSection from '#lib/components/InstallSection.svelte';
+	import PageHead from '#lib/components/PageHead.svelte';
+	import { currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages());
 </script>
diff --git a/src/routes/[[lang=locale]]/results/+page.svelte b/src/routes/[[lang=locale]]/results/+page.svelte
index d29a2c6..5d66aa0 100644
--- a/src/routes/[[lang=locale]]/results/+page.svelte
+++ b/src/routes/[[lang=locale]]/results/+page.svelte
@@ -1,8 +1,8 @@
 <script lang="ts">
-	import { loadResults, type Loaded } from '$lib/bench';
-	import PageHead from '$lib/components/PageHead.svelte';
-	import ResultsTable from '$lib/components/ResultsTable.svelte';
-	import { currentMessages } from '$lib/content';
+	import { loadResults, type Loaded } from '#lib/bench.js';
+	import PageHead from '#lib/components/PageHead.svelte';
+	import ResultsTable from '#lib/components/ResultsTable.svelte';
+	import { currentMessages } from '#lib/content/index.js';
 
 	const t = $derived(currentMessages().results);
 
diff --git a/src/routes/sitemap.xml/+server.ts b/src/routes/sitemap.xml/+server.ts
index 1d8e40e..d9f685d 100644
--- a/src/routes/sitemap.xml/+server.ts
+++ b/src/routes/sitemap.xml/+server.ts
@@ -1,5 +1,5 @@
-import { defaultLocale, localeInfo, locales } from '$lib/locales';
-import { pageUrl } from '$lib/seo';
+import { defaultLocale, localeInfo, locales } from '#lib/locales.js';
+import { pageUrl } from '#lib/seo.js';
 
 export const prerender = true;
 
diff --git a/svelte.config.js b/svelte.config.js
deleted file mode 100644
index dbc9582..0000000
--- a/svelte.config.js
+++ /dev/null
@@ -1,15 +0,0 @@
-import adapter from '@sveltejs/adapter-static';
-import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
-
-/** @type {import('@sveltejs/kit').Config} */
-const config = {
-	preprocess: vitePreprocess(),
-	kit: {
-		adapter: adapter(),
-		prerender: {
-			entries: ['/', '/zh-CN', '/results', '/zh-CN/results', '/sitemap.xml']
-		}
-	}
-};
-
-export default config;
diff --git a/tsconfig.json b/tsconfig.json
index a8f10c8..7a18d2d 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,14 +1,12 @@
 {
-	"extends": "./.svelte-kit/tsconfig.json",
+	"extends": "$app/tsconfig",
 	"compilerOptions": {
-		"allowJs": true,
-		"checkJs": true,
-		"esModuleInterop": true,
-		"forceConsistentCasingInFileNames": true,
-		"resolveJsonModule": true,
-		"skipLibCheck": true,
 		"sourceMap": true,
-		"strict": true,
-		"moduleResolution": "bundler"
-	}
+		"strict": true
+	},
+	"include": [
+		"src",
+		"vite.config.ts",
+		"tests"
+	]
 }
diff --git a/vite.config.ts b/vite.config.ts
index bf699a8..1974dd3 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,7 +1,18 @@
+import adapter from '@sveltejs/adapter-static';
+import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
 import { sveltekit } from '@sveltejs/kit/vite';
 import tailwindcss from '@tailwindcss/vite';
 import { defineConfig } from 'vite';
 
 export default defineConfig({
-	plugins: [tailwindcss(), sveltekit()]
+	plugins: [
+		tailwindcss(),
+		sveltekit({
+			preprocess: vitePreprocess(),
+			adapter: adapter(),
+			prerender: {
+				entries: ['/', '/zh-CN', '/results', '/zh-CN/results', '/sitemap.xml']
+			}
+		})
+	]
 });