import { SmrtCollection } from '@happyvertical/smrt-core';
import { PipelineStage } from '../models/PipelineStage.js';
export declare class PipelineStageCollection extends SmrtCollection<PipelineStage> {
    static readonly _itemClass: typeof PipelineStage;
    /**
     * List a pipeline's stages in board order.
     *
     * @param pipelineId - Owning PipelineDefinition id
     * @returns Stages ordered by `sortOrder` ascending
     */
    findByPipeline(pipelineId: string): Promise<PipelineStage[]>;
    /**
     * Find one stage by its natural key within a pipeline.
     *
     * @param pipelineId - Owning PipelineDefinition id
     * @param key - Stage machine key (e.g. `'proposal'`)
     * @returns The stage, or null when the key does not exist in the pipeline
     */
    findByKey(pipelineId: string, key: string): Promise<PipelineStage | null>;
}
export default PipelineStageCollection;
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