import type { WorkUnderstandingEvidenceItem, WorkUnderstandingInvestigation, WorkUnderstandingInvestigationBudget } from './types.js';
export declare function createWorkUnderstandingInvestigation(input: {
    discoveryRunId: string;
    budget: WorkUnderstandingInvestigationBudget;
    nowMs?: number;
}): WorkUnderstandingInvestigation;
export declare function getWorkUnderstandingInvestigation(id: string): WorkUnderstandingInvestigation | null;
export declare function getWorkUnderstandingInvestigationForRun(runId: string): WorkUnderstandingInvestigation | null;
export declare function updateWorkUnderstandingInvestigation(id: string, patch: Partial<Pick<WorkUnderstandingInvestigation, 'status' | 'plan' | 'toolCallCount' | 'contentCharsRead' | 'completedAt' | 'errorMessage'>>): WorkUnderstandingInvestigation | null;
export declare function resetWorkUnderstandingInvestigation(id: string, budget: WorkUnderstandingInvestigationBudget, nowMs?: number): WorkUnderstandingInvestigation | null;
export declare function appendWorkUnderstandingEvidence(input: Omit<WorkUnderstandingEvidenceItem, 'id' | 'collectedAt'> & {
    id?: string;
    collectedAt?: number;
}): WorkUnderstandingEvidenceItem;
export declare function updateWorkUnderstandingEvidenceObservation(id: string, observation: string): void;
export declare function listWorkUnderstandingEvidence(investigationId: string): WorkUnderstandingEvidenceItem[];