UE AI and Navigation

Target engine: UE 5.8. APIs below are verified against the 5.8 headers; older forms are listed under "Deprecated — do not use".

Classic UE AI runs on a server-only AAIController that owns a brain component (UBehaviorTreeComponent), a UBlackboardComponent, a UAIPerceptionComponent and a UPathFollowingComponent. Behavior trees, perception and EQS live in the AIModule; navmesh generation and queries live in NavigationSystem; BT tasks that wrap gameplay tasks need GameplayTasks. Smart Objects (SmartObjectsModule, plugin SmartObjects), ZoneGraph (ZoneGraph, Experimental in 5.8), MassAI (Experimental in 5.8) and NavCorridor (Experimental in 5.8) are opt-in plugins. Add what you use to PublicDependencyModuleNames in your .Build.cs, e.g. "AIModule", "NavigationSystem", "GameplayTasks".

Context

Read .agents/ue-project-context.md if it exists (module names, conventions, enabled plugins, GAS/networking setup). Do not stop if it is missing.

Identify the area from the request and the codebase. Ask only when two plausible readings would produce different code.