import type { StageId } from '../types/index.js';
import type { Stage } from './spec-types.js';
import type { ContractStageInput, ContractStageOutput, ContractStageOptions } from './contract-types.js';
export declare class ContractStage implements Stage<ContractStageInput, ContractStageOutput> {
    private readonly options;
    readonly stageId: StageId;
    private readonly now;
    constructor(options: ContractStageOptions);
    execute(input: ContractStageInput): Promise<ContractStageOutput>;
    /**
     * Topological sort of work packages by dependencies.
     * Falls back to original order for cycles or missing refs.
     */
    private computeDeliveryOrder;
    private writeArtifact;
}
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