An MCP server that helps coding agents build and edit Hearts of Iron IV mods.

Make focus trees, events and decisions. Edit maps and generate a new world. Preview windows, trees and maps, find the right rule in the docs, fix broken script and balance AI choices.

What it does

Your agent can build and edit focus trees, events, decisions and maps, and generate a new world.

For a new map, give it a cleaned local reference image and preview the interpreted geography before writing. The map workflow creates provinces, states, terrain, cities, countries, supply and a provisional starting scenario. Reviewed names and masks refine ambiguous artwork; offline validation is separate from native campaign acceptance. It previews focus trees, technology folders, windows and maps, finds the right rule in the game’s documentation, fixes broken script and tunes AI choices. You describe what you want; the agent picks the…