Launch Hearts of Iron IV with your mod enabled. Select your chosen country and press ~ to open the developer console. Type focus.nochecks and focus.autocomplete to instantly click through your new tree and ensure all rewards, spirits, and war goals fire exactly as intended. Best Practices for Balanced Focus Tree Design
The most memorable HOI4 mods begin with great focus trees. Now you have the tools and knowledge to build your own. Good luck, and happy modding. hoi4 focus tree maker
Mutual exclusivity to multiple focuses is usually done by putting several of focus = TAG_focusname in the same mutually_exclusive, Hearts of Iron 4 Wiki Launch Hearts of Iron IV with your mod enabled
Within the tree, each individual focus is defined with its own unique id , a position in the tree's grid, prerequisites, completion time, and rewards. The most important elements are the completion_reward (the actual effects when a focus finishes), available (conditions to start it), and ai_will_do (AI weighting). Best Practices for Balanced Focus Tree Design The
Define prerequisites (which focuses must be finished first) and mutually exclusive paths where choosing one branch blocks another forever.
Do not forget to create a matching file in your mod's localization/english/ folder to ensure your focus titles and descriptions display correctly in English rather than showing raw code IDs.