SvelteKit `dist/index.d.ts` exports component instead of types

I have a SvelteKit (v1.5) vite library project that exports a single component from dist/index.js:

export { default as Settings } from './components/Settings.svelte';

I also have one simple type definition in src/types/index.d.ts I would like to export for lib users:

//...
export type SettingsWritable = ...

I - maybe naively - would expect this to be exported by dist/index.d.ts. However dist/index.d.ts has the same content as dist/index.js - exporting the component as above.

Is my expectation wrong? If not, how would I make sure my type definitions (currently in src/types/index.d.ts) are exported correctly?

Here are some possibly helpful package.json properties:

"exports": {
    ".": {
        "types": "./dist/index.d.ts",
        "svelte": "./dist/index.js"
    }
},
"files": [
    "dist",
    "!dist/**/*.test.*",
    "!dist/**/*.spec.*",
    "build",
    "riga-tool.config.json"
],
"main": "./dist/index.js",
"svelte": "./dist/index.js",
"types": "./dist/index.d.ts",
"type": "module"

I'm also using the standard tsconfig from the SvelteKit starter repo:

{
	"compilerOptions": {
		// ...
		"rootDirs": [
			"..",
			"./types"
		],
		// ...
	},
	"include": [
		"ambient.d.ts",
		"./types/**/$types.d.ts",
		"../vite.config.ts",
		"../src/**/*.js",
		"../src/**/*.ts",
		"../src/**/*.svelte",
		"../tests/**/*.js",
		"../tests/**/*.ts",
		"../tests/**/*.svelte"
	],
	"exclude": [
		"../node_modules/**",
		"./[!ambient.d.ts]**",
		"../src/service-worker.js",
		"../src/service-worker.ts",
		"../src/service-worker.d.ts"
	]
}

Many thanks for any pointers!

The types for components are generated automatically and should be provided as [name].svelte.d.ts, if you need to expose additional types, you can just export them alongside the components. E.g.

export { default as Settings } from './components/Settings.svelte';
export * from './types'; // if there is an index.ts

Would recommend using .ts for "new" types and .d.ts only if the type declarations are for existing .js/other files.