After some back and forth between the creator of the sn_codesearch app
Cory Seering
I have a better understanding of how this works.

This scoped app now uses its own search group to search 49 tables
instead of the default 29.

It now includes everything OOB I can think of that could run code
server/client side.

Setup

  1. Open Studio on your environment
  2. Import from source
  3. Paste in the following URL:
    https://github.com/jacebenson/servicenow-code.git

Update

For those who already installed it;

  1. Open Studio on your environment
  2. Select Code Search for SP
  3. Source Control-Apply Remote Changes

This will make the app much smaller as it also moves the scopes from
before.

Usage

After you import this you can start to use it by navigating to /code
on your instance.