diff --git a/packages/sv/lib/cli/add/utils.ts b/packages/sv/lib/cli/add/utils.ts
index d2e4e8216..95089cb1f 100644
--- a/packages/sv/lib/cli/add/utils.ts
+++ b/packages/sv/lib/cli/add/utils.ts
@@ -130,8 +130,8 @@ export const commonFilePaths = {
 	packageJson: 'package.json',
 	svelteConfig: 'svelte.config.js',
 	svelteConfigTS: 'svelte.config.ts',
-	jsconfig: 'jsconfig.json',
-	tsconfig: 'tsconfig.json',
+	jsConfig: 'jsconfig.json',
+	tsConfig: 'tsconfig.json',
 	viteConfig: 'vite.config.js',
 	viteConfigTS: 'vite.config.ts'
 } as const;
diff --git a/packages/sv/lib/cli/add/workspace.ts b/packages/sv/lib/cli/add/workspace.ts
index 886ca7468..f49eec346 100644
--- a/packages/sv/lib/cli/add/workspace.ts
+++ b/packages/sv/lib/cli/add/workspace.ts
@@ -24,15 +24,17 @@ export async function createWorkspace({
 	const resolvedCwd = path.resolve(cwd);
 
 	// Will go up and prioritize jsconfig.json as it's first in the array
-	const tjsconfig = find.any([commonFilePaths.jsconfig, commonFilePaths.tsconfig], { cwd });
-	// If the file is not ending with jsconfig.json, then we are using typescript
-	const usesTypescript = !tjsconfig?.endsWith(commonFilePaths.jsconfig);
+	const jtsConfigPath = find.any([commonFilePaths.jsConfig, commonFilePaths.tsConfig], { cwd });
+	const typescript = jtsConfigPath?.endsWith(commonFilePaths.tsConfig) ?? false;
 
 	// This is not linked with typescript detection
 	const viteConfigPath = path.join(resolvedCwd, commonFilePaths.viteConfigTS);
 	const viteConfig = fs.existsSync(viteConfigPath)
 		? commonFilePaths.viteConfigTS
 		: commonFilePaths.viteConfig;
+
+	// ecosystem doesn't support `svelte.config.ts` https://github.com/sveltejs/cli/issues/816#issuecomment-3568032867
+	// but the user may have opt in to it
 	const svelteConfigPath = path.join(resolvedCwd, commonFilePaths.svelteConfigTS);
 	const svelteConfig = fs.existsSync(svelteConfigPath)
 		? commonFilePaths.svelteConfigTS
@@ -82,7 +84,7 @@ export async function createWorkspace({
 	return {
 		cwd: resolvedCwd,
 		packageManager: packageManager ?? (await detect({ cwd }))?.name ?? getUserAgent() ?? 'npm',
-		typescript: usesTypescript,
+		typescript,
 		files: {
 			viteConfig,
 			svelteConfig,
@@ -135,7 +137,7 @@ function parseKitOptions(cwd: string) {
 	const { ast } = parseScript(configSource);
 
 	const defaultExport = ast.body.find((s) => s.type === 'ExportDefaultDeclaration');
-	if (!defaultExport) throw Error('Missing default export in `svelte.config.js`');
+	if (!defaultExport) throw Error(`Missing default export in \`${commonFilePaths.svelteConfig}\``);
 
 	let objectExpression: AstTypes.ObjectExpression | undefined;
 	if (defaultExport.declaration.type === 'Identifier') {
@@ -157,14 +159,17 @@ function parseKitOptions(cwd: string) {
 		}
 
 		if (!objectExpression)
-			throw Error('Unable to find svelte config object expression from `svelte.config.js`');
+			throw Error(
+				`Unable to find svelte config object expression from \`${commonFilePaths.svelteConfig}\``
+			);
 	} else if (defaultExport.declaration.type === 'ObjectExpression') {
 		// e.g. `export default { ... };`
 		objectExpression = defaultExport.declaration;
 	}
 
 	// We'll error out since we can't safely determine the config object
-	if (!objectExpression) throw new Error('Unexpected svelte config shape from `svelte.config.js`');
+	if (!objectExpression)
+		throw new Error(`Unexpected svelte config shape from \`${commonFilePaths.svelteConfig}\``);
 
 	const kit = object.property(objectExpression, { name: 'kit', fallback: object.create({}) });
 	const files = object.property(kit, { name: 'files', fallback: object.create({}) });
diff --git a/packages/sv/lib/cli/create.ts b/packages/sv/lib/cli/create.ts
index e02d2eeb6..7a5b7a4fe 100644
--- a/packages/sv/lib/cli/create.ts
+++ b/packages/sv/lib/cli/create.ts
@@ -390,7 +390,8 @@ export async function createVirtualWorkspace({
 		files: {
 			...tentativeWorkspace.files,
 			viteConfig: type === 'typescript' ? commonFilePaths.viteConfigTS : commonFilePaths.viteConfig,
-			svelteConfig: commonFilePaths.svelteConfig // currently we always use js files, never typescript files
+			// ecosystem doesn't support `svelte.config.ts` https://github.com/sveltejs/cli/issues/816#issuecomment-3568032867
+			svelteConfig: commonFilePaths.svelteConfig
 		}
 	};
 
diff --git a/packages/sv/lib/create/index.ts b/packages/sv/lib/create/index.ts
index 59b1ba8fb..89dad90b5 100644
--- a/packages/sv/lib/create/index.ts
+++ b/packages/sv/lib/create/index.ts
@@ -1,6 +1,7 @@
 import fs from 'node:fs';
 import path from 'node:path';
 import { mkdirp, copy, dist, getSharedFiles } from './utils.ts';
+import { commonFilePaths } from '../cli/add/utils.ts';
 
 export type TemplateType = (typeof templateTypes)[number];
 export type LanguageType = (typeof languageTypes)[number];
@@ -68,7 +69,7 @@ function write_template_files(template: string, types: LanguageType, name: strin
 function write_common_files(cwd: string, options: Options, name: string) {
 	const files = getSharedFiles();
 
-	const pkg_file = path.join(cwd, 'package.json');
+	const pkg_file = path.join(cwd, commonFilePaths.packageJson);
 	const pkg = /** @type {any} */ JSON.parse(fs.readFileSync(pkg_file, 'utf-8'));
 
 	sort_files(files).forEach((file) => {
@@ -77,7 +78,7 @@ function write_common_files(cwd: string, options: Options, name: string) {
 
 		if (exclude || !include) return;
 
-		if (file.name === 'package.json') {
+		if (file.name === commonFilePaths.packageJson) {
 			const new_pkg = JSON.parse(file.contents);
 			merge(pkg, new_pkg);
 		} else {
diff --git a/packages/sv/lib/create/playground.ts b/packages/sv/lib/create/playground.ts
index 6ec216415..189de81a1 100644
--- a/packages/sv/lib/create/playground.ts
+++ b/packages/sv/lib/create/playground.ts
@@ -6,6 +6,7 @@ import { parseJson, parseScript, parseSvelte } from '../core/tooling/parsers.ts'
 import { isVersionUnsupportedBelow } from '../core/index.ts';
 import { getSharedFiles } from './utils.ts';
 import { walk } from 'zimmerframe';
+import { commonFilePaths } from '../cli/add/utils.ts';
 
 export function validatePlaygroundUrl(link: string): boolean {
 	try {
@@ -231,7 +232,7 @@ export function setupPlaygroundProject(
 	fs.writeFileSync(filePath, newContent, 'utf-8');
 
 	// add packages as dependencies to package.json if requested
-	const pkgPath = path.join(cwd, 'package.json');
+	const pkgPath = path.join(cwd, commonFilePaths.packageJson);
 	const pkgSource = fs.readFileSync(pkgPath, 'utf-8');
 	const pkgJson = parseJson(pkgSource);
 	let updatePackageJson = false;
@@ -245,7 +246,8 @@ export function setupPlaygroundProject(
 
 	let experimentalAsyncNeeded = true;
 	const addExperimentalAsync = () => {
-		const svelteConfigPath = path.join(cwd, 'svelte.config.js');
+		// ecosystem doesn't support `svelte.config.ts` https://github.com/sveltejs/cli/issues/816#issuecomment-3568032867
+		const svelteConfigPath = path.join(cwd, commonFilePaths.svelteConfig);
 		const svelteConfig = fs.readFileSync(svelteConfigPath, 'utf-8');
 		const { ast, generateCode } = parseScript(svelteConfig);
 		const { value: config } = js.exports.createDefault(ast, { fallback: js.object.create({}) });
@@ -253,7 +255,7 @@ export function setupPlaygroundProject(
 		fs.writeFileSync(svelteConfigPath, generateCode(), 'utf-8');
 	};
 
-	// we want to change the svelte version, even if the user decieded
+	// we want to change the svelte version, even if the user decided
 	// to not install external dependencies
 	if (playground.svelteVersion) {
 		updatePackageJson = true;
diff --git a/packages/sv/lib/create/templates/demo/src/routes/+page.svelte b/packages/sv/lib/create/templates/demo/src/routes/+page.svelte
index a328ff63a..0f797fd5f 100644
--- a/packages/sv/lib/create/templates/demo/src/routes/+page.svelte
+++ b/packages/sv/lib/create/templates/demo/src/routes/+page.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
 	import Counter from './Counter.svelte';
-	import welcome from '$lib/images/svelte-welcome.webp';
-	import welcomeFallback from '$lib/images/svelte-welcome.png';
+	import welcome from './svelte-welcome.webp';
+	import welcomeFallback from './svelte-welcome.png';
 </script>
 
 <svelte:head>
diff --git a/packages/sv/lib/create/templates/demo/src/routes/Header.svelte b/packages/sv/lib/create/templates/demo/src/routes/Header.svelte
index 0e719eb08..ff378aecd 100644
--- a/packages/sv/lib/create/templates/demo/src/routes/Header.svelte
+++ b/packages/sv/lib/create/templates/demo/src/routes/Header.svelte
@@ -1,8 +1,8 @@
 <script lang="ts">
 	import { resolve } from '$app/paths';
 	import { page } from '$app/state';
-	import logo from '$lib/images/svelte-logo.svg';
-	import github from '$lib/images/github.svg';
+	import logo from './svelte-logo.svg';
+	import github from './github.svg';
 </script>
 
 <header>
diff --git a/packages/sv/lib/create/templates/demo/src/lib/images/github.svg b/packages/sv/lib/create/templates/demo/src/routes/github.svg
similarity index 100%
rename from packages/sv/lib/create/templates/demo/src/lib/images/github.svg
rename to packages/sv/lib/create/templates/demo/src/routes/github.svg
diff --git a/packages/sv/lib/create/templates/demo/src/lib/images/svelte-logo.svg b/packages/sv/lib/create/templates/demo/src/routes/svelte-logo.svg
similarity index 100%
rename from packages/sv/lib/create/templates/demo/src/lib/images/svelte-logo.svg
rename to packages/sv/lib/create/templates/demo/src/routes/svelte-logo.svg
diff --git a/packages/sv/lib/create/templates/demo/src/lib/images/svelte-welcome.png b/packages/sv/lib/create/templates/demo/src/routes/svelte-welcome.png
similarity index 100%
rename from packages/sv/lib/create/templates/demo/src/lib/images/svelte-welcome.png
rename to packages/sv/lib/create/templates/demo/src/routes/svelte-welcome.png
diff --git a/packages/sv/lib/create/templates/demo/src/lib/images/svelte-welcome.webp b/packages/sv/lib/create/templates/demo/src/routes/svelte-welcome.webp
similarity index 100%
rename from packages/sv/lib/create/templates/demo/src/lib/images/svelte-welcome.webp
rename to packages/sv/lib/create/templates/demo/src/routes/svelte-welcome.webp