/**
 * Stage Context — tracks current stage, transition history, and per-stage artifacts.
 * (arc42 §5.1)
 */
import type { ArtifactRef, GateVerdict, StageId } from '../types/index.js';
/** A recorded transition between stages. */
export interface TransitionRecord {
    from: StageId;
    to: StageId;
    verdict: GateVerdict;
    timestamp: string;
}
/** Mutable context tracking pipeline stage progression. */
export declare class StageContext {
    private currentStage;
    private readonly history;
    private readonly artifacts;
    constructor(initialStage: StageId);
    getCurrentStage(): StageId;
    getHistory(): readonly TransitionRecord[];
    /** Record a transition and update current stage. */
    recordTransition(from: StageId, to: StageId, verdict: GateVerdict): void;
    /** Register artifacts produced during a stage. */
    addArtifacts(stage: StageId, refs: ArtifactRef[]): void;
    /** Get artifacts for a specific stage. */
    getArtifacts(stage: StageId): readonly ArtifactRef[];
}
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