One entry of effectKnobCatalogue: what a UI or a coding agent needs to offer the knob and validate a value for it. The value in force is MapEffects.get.
The knob's id, as accepted by MapEffects.set.
One entry of effectKnobCatalogue: what a UI or a coding agent needs to offer the knob and validate a value for it. The value in force is MapEffects.get.