Game AI navigation & pathfinding

Move agents through a level intelligently and per-engine-correctly: pick a world representation, run the right search, then follow the result with steering + local avoidance. This skill owns the navigation stack; it stops where physics collision response and high-level behaviour design begin.

Version targets & the API ban-list (read first)

Navigation APIs were renamed hard between engine generations. Emitting an old name compiles into nothing or silent breakage. Target these versions; never emit the banned column.