/**
 * Every key, as a pure reducer: UI state, data and a key in; new UI state and at
 * most one effect out (operator-console/AC-4, operator-console/AC-27..AC-38,
 * operator-console/AC-40..AC-42, operator-console/AC-45..AC-52).
 *
 * It reads no file and runs nothing, so every key path is a unit test. Letters on
 * the dashboard are always actions and never start typing (operator-console/AC-46),
 * so no typed sentence can trigger one. Actions that stop, forget or start work go
 * through a `y`/`n` confirm; approve does not (operator-console/AC-29).
 *
 * @module
 */
import type { Effect, KeyName, OperatorData, UiState } from './model.js';
export interface Step {
    ui: UiState;
    effect: Effect | null;
}
/** `r`'s count: a whole number of at least 1, checked before it reaches argv. */
export declare function validCount(v: string): string | undefined;
export declare function onKey(ui: UiState, data: OperatorData, key: KeyName): Step;
/** Selections kept inside each panel's rows after a refresh shrank them. */
export declare function clampSelection(ui: UiState, data: OperatorData): UiState;
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