Does anyone here knows how to develop a module and or system?

My group currently plays a rather old version (4.1) of The Dark Eye (Das Schwarze Auge) which is super popular in Germany. Sadly the only game system available is not well suited for anything, so three of us decided to write our own.

In the concrete scenario where I need help is getting the compendium data into the game. I have written compendium test data and the cli was able to put it into database files. When I boot a world with that game system it also parses the entries but then nothing, they don’t show up.

Edit:

Turned out that the _key is super important on the JSONs/YMLs and have to correspond to the actual documentClass.

I figured it out by looking at the database (of type level db) when I created a new Item inside a running game and synchronised my input files for the compendia. Now it works.