Mods: Creating a Mod - JasXSL/FetishQuest GitHub Wiki
To access the mod tools (WIP), just add /modtools.html to the URL. If you're on the public branch it would be https://fetishquest.com/modtools.html beta would be https://beta.fetishquest.com/modtools.html etc.
Here you can see a list of your installed mods and create new mods. New Mod will create a new blank mod. Clone Official will let you create a copy of the core game. If you do clone official, consider disabling it in the game's main menu, as it'll duplicate all texts and slow down loading. But an official clone can be helpful to learn the tools by example.
Once you create a new mod, you can edit its name, author, and description. Remember to save. You can also export your mod as a file or plaintext. You can import a mod from the game's main menu, and that mod will end up in the editor.
At the bottom of the page is a listing of the various types of assets used in FQ. Clicking them will bring up a table of assets tied to your mod. You can type in the pink bar at the top of the table to filter by whatever you type.