import type { BackgroundToolTaskRef } from "../background-tool-task-controller.ts";
import type { OpenTaskStepRef } from "../goals/goal-tool-core.ts";
import { type TaskStep, type TaskStepsState } from "../tasks/task-state.ts";
import { type IncrementResult, type PipelineDefinition, type PipelineRun } from "./types.ts";
export interface PipelineIncrementJoin {
    openTaskSteps?: readonly OpenTaskStepRef[];
    backgroundToolTasks?: readonly BackgroundToolTaskRef[];
}
export declare class PipelineIncrementError extends Error {
    constructor(message: string);
}
export declare function incrementPipelineRun(definition: PipelineDefinition, run: PipelineRun, now: string, join?: PipelineIncrementJoin): {
    run: PipelineRun;
    result: IncrementResult;
};
export declare function abandonPipelineRun(run: PipelineRun, now: string): PipelineRun;
export declare function advanceTaskSteps(state: TaskStepsState, now: string): {
    state: TaskStepsState;
    result: IncrementResult;
};
export declare function currentOpenTaskStep(steps: readonly TaskStep[]): TaskStep | undefined;
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