There are three bits of tooling that you should tweak for your track:
The Lines of Code Counter: this tool is tasked with counting the lines of code for each submitted iteration.
The Snippet Extractor: this tool extracts a snippet for each iteration, which is shown on the website.
The Exercism CLI: this tool is used by students to work on a track locally, on their own machine.
Note
Even though tweaking these tools is optional, it'll make your track's integration into the website much better.
Therefore, we highly recommend you tweak all three tools.