Actuator Systematization

The problem

The architecture specifies actuator categories (communication modulation, observation surfacing, withholding, controllability provision, environmental signals, silence) but does not provide a systematic mapping from state to action to predicted state change. This is the control design problem and it requires the plant model.

What's needed

A formal mapping: estimated state variables -> available actuator inputs -> predicted effects on state. This mapping is what converts the regime table from an illustrative design hypothesis into a validated protocol.

Dependencies

Requires the plant model (open-problem: plant-model.md) to predict actuator effects on state trajectories. Requires the measurement stack (assessment: measurement-stack.md) to close the feedback loop. The two open problems are coupled: you cannot design control without a plant model, and you cannot validate a plant model without measurement.