The EU4 devs have been using forum suggestions to aid gaps in AI

One fan in particular managed to reverse engineer AI behaviour in a way that was easier to understand than the code itself

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Europa Universalis 4 - Leviathan - Development Diary 9th of March 2021, Page 7

Europa Universalis IV - Development Diary 19th of July 2022, Page 5

How do I make an AI discover me? : r/eu4

Paradox, please fix non-european nations having the same tech level as europeans throughout the entire game. : r/paradoxplaza

Europa Universalis IV

Changes in the map between release and Common Sense : r/eu4

The EU4 devs have been using forum suggestions to aid gaps in AI development

AI Abusing Mission System to Hyper-Develop : r/eu4

Steam Workshop::Dukko's Tinkerer Shop [PYXIS]