import { ProjectContext, SubagentDefinition, ChangeProposal } from './types';
export interface CheckpointData {
    id: string;
    timestamp: Date;
    projectContext: ProjectContext;
    activeAgents: SubagentDefinition[];
    currentSession: {
        tasksCompleted: string[];
        tasksInProgress: string[];
        tasksPending: string[];
        currentFocus: string;
        keyDecisions: string[];
        importantContext: string[];
    };
    approvalHistory: {
        totalProposals: number;
        approvedProposals: number;
        rejectedProposals: number;
        recentProposals: ChangeProposal[];
    };
    nextSteps: string[];
    warnings: string[];
    estimatedTokenUsage: number;
    contextWindowUtilization: number;
}
export interface CheckpointConfig {
    enabled: boolean;
    warningThreshold: number;
    checkpointThreshold: number;
    maxContextTokens: number;
    autoRestart: boolean;
    saveFrequency: number;
    retentionDays: number;
}
export declare class CheckpointSystem {
    private projectPath;
    private checkpointDir;
    private config;
    private currentTokenCount;
    private interactionCount;
    constructor(projectPath?: string);
    initialize(): Promise<void>;
    private loadConfig;
    createCheckpoint(projectContext: ProjectContext, activeAgents: SubagentDefinition[], sessionData: CheckpointData['currentSession'], approvalHistory: CheckpointData['approvalHistory'], nextSteps?: string[], warnings?: string[]): Promise<CheckpointData>;
    private createCheckpointSummary;
    updateTokenCount(additionalTokens: number): void;
    private checkContextLimits;
    private triggerEmergencyCheckpoint;
    shouldCreateCheckpoint(): Promise<boolean>;
    private hasEmergencyFlag;
    clearEmergencyFlag(): Promise<void>;
    listCheckpoints(): Promise<CheckpointData[]>;
    restoreCheckpoint(checkpointId: string): Promise<CheckpointData | null>;
    getContextWindowStatus(): Promise<{
        utilization: number;
        tokensUsed: number;
        tokensRemaining: number;
        status: 'safe' | 'warning' | 'critical';
    }>;
    generateRestartPrompt(checkpoint: CheckpointData): string;
    private generateCheckpointId;
    private getProjectFeatures;
    private cleanupOldCheckpoints;
}