Mod manager for the Steam versions of Total War titles: Warhammer 3, Pharaoh, Three Kingdoms, Warhammer 2, Attila, Rome II, Shogun 2.
Features not present in the CA launcher:

yarn start
yarn make
I build with yarn 1.22.22 and node v20.18.1. You can try using yarn install --frozen-lockfile --ignore-engines if you end up with dependency errors.
Note that yarn start does hot-reloading, but hot-reloading files related to the main Electron process (basically index.ts, the stuff related to the OS and files) won't work but hot-reloading the renderer process works (basically everything user facing).
$ claude mcp add WH3-Mod-Manager \
-- python -m otcore.mcp_server <graph>