Pixlet serve with query params

In the authoring tutorial, it says you can pass config variables with either

  1. Passing URL query parameters when using pixlet serve .
  2. Setting command-line arguments via pixlet render .

I was at least trying to do 1), but how do you pass query params with pixlet serve? I tried appending query params to with no affect. It would be helpful if there were actual examples of each of these approaches.

run pixlet serve on a star file in the community repo. Then navigate to
When you change the preference schemas they are added to the query params in the url. They should be accessible via the config object.