ACTION_CHAIN_REFERENCE.md

Action Chain, Follow-up Menu, and State Machine Rules

Purpose: Context seed for continuing AC game development. Read alongside AC_Context.md and UI_SYSTEMS_REFERENCE.md.

Only the following action sequences are valid at this stage:

Sequence	End Trigger
Move → Attack → End	Automatic after Attack Resolve
Move → Wait → End	Manual (player selects Wait)
Attack → End	Automatic after Attack Resolve

All Attack paths route through SkillSelecting before entering AttackTargeting.

All actions (Move and Attack) must follow this sequence without exception:

Targeting → Confirm → Resolving → Complete

Once Confirm is executed: the action cannot be cancelled and cannot be rolled back.
Resolving is an explicit state that blocks all input until animation completes.
Any invalid proposal must not alter game state.

Confirm is allowed only if the destination tile is valid.
Valid = in bounds, all footprint tiles unoccupied (except by the moving unit itself), within Manhattan distance of unit's moveRange.