export type StepKind = 'auto' | 'human_gate' | 'choice' | 'info' | 'input' | 'done' | 'error';
export interface StepView {
    kind: StepKind;
    prompt: string;
    options?: {
        value: string;
        label: string;
        note?: string;
    }[];
    collect?: {
        field: string;
        desc: string;
        secret?: boolean;
    }[];
    context?: Record<string, unknown>;
}
export interface PlatformFlow<Step extends string, Progress, Input> {
    resumeStep: (progress: Progress | null) => Step;
    viewForStep: (step: Step, progress: Progress, ctx?: Record<string, unknown>) => StepView;
    applyInput: (step: Step, progress: Progress, input: Input) => Progress;
    runEffect: (step: Step, progress: Progress, deps: unknown) => Promise<unknown>;
}
/** Runtime guard used by tests + frontends to validate a view-model. */
export declare function isStepView(v: unknown): v is StepView;