[Zooko]

I wish to write a mod that controls how units behave in battle by expressing their behavior in a full programming language such as C, Lua, Python, Io, etc.

Then I could write a mod which would get used whenever a Celestial Master was in combat and wasn't following his master's five battle orders. The mod would be careful never to cast Breath of Winter when standing near other, cold-vulnerable commanders, for example.