Could you explain what you mean here?
A key value with tiddlywiki is you can use its own code to explore how it works, to make modifications and even find out how to do your own thing based on the existing core.
It would seem to me that source mapping as I imagine it to be would benefit from readable code.
On an external core
In a very simple way to understand an externalised core is consider the plugins in a wiki, it always comes with the “$:/core” plugin. Now imagine this in a separate file that gets loaded when you open your wiki. Only your customisations are stored in your wiki, making it quicker to load and save every time.
- Your wiki will not load if it cant find the external core.
- Multiple wikis can use the same external core.
- Download once use many times.