ScryfallLinks is a MediaWiki extension that creates Scryfall links from Magic: The Gathering card names.
It is designed to be backwards-compatible with the MTG Wiki's "MTGSCards" extension.
It is based on https://www.mediawiki.org/wiki/Extension:BoilerPlate.
It makes use of the Scryfall API to load images, and Tippy.js tooltips (also MIT licensed).
Running npm test and composer test will run automated code checks.
If you want to hack on this, whatever you're looking for is probably in extension.json, or /resources, or /src.