import type { ArtifactRef, EVisaEvent } from "../types.js";
import type { InternalRunResult, Step, StepContext } from "./internal-types.js";
export interface StepRunnerOptions {
    steps: Step[];
    context: Omit<StepContext, "setResult" | "addArtifacts">;
}
export declare class StepRunner {
    private readonly steps;
    private readonly context;
    private result;
    private readonly artifacts;
    constructor(options: StepRunnerOptions);
    private emitTiming;
    run(startUrl: string): Promise<InternalRunResult>;
    captureDebug(label: string): Promise<ArtifactRef[]>;
}
export declare const emitSafe: (emit: ((event: EVisaEvent) => void) | undefined) => (event: EVisaEvent) => void;