/** Machine-readable declaration for one step argument. */
export interface DevArgSpec {
    /** Primitive argument kind. */
    type: 'string' | 'number' | 'boolean' | 'array';
    /** Whether the argument must be present. */
    required?: boolean;
    /** Constraint on array members, including object field constraints. */
    element?: 'string' | {
        fields: Readonly<Record<string, 'string' | {
            type: 'string';
            nonEmpty?: boolean;
        }>>;
        nonEmpty?: boolean;
    };
    /** Whether a string or array argument itself must be non-empty. */
    nonEmpty?: boolean;
}
/** Per-step argument specifications used by development plan validation. */
export declare const DEV_ARG_SPECS: Readonly<Record<string, Readonly<Record<string, DevArgSpec>>>>;