Hi,
Library doesn't have typescript definitions. Of course, you still can use the library in typescript project, where it will work< but will not provide type safety.
There was an issue related to the way how are imports defined, so versions before 1.1.4 may not work without typescript tool-chain without extra configuration. Latest version ( was released after your post ) works fine.
Here is the working template https://svar.dev/files/kit-core-ts.zip
