export declare const DEFAULT_AGENT_ID = "__default__";
export interface InstanceRef {
    type: 'port' | 'path';
    value: string;
}
export interface ProjectContext {
    sceneTree: unknown | null;
    scriptPaths: string[];
    lastValidation: number;
}
export interface AgentState {
    agentId: string;
    selectedInstance: InstanceRef | null;
    activeProfile: string;
    contextCache: Map<string, ProjectContext>;
    lastSeen: number;
    isEphemeral: boolean;
}
export declare class AgentContextManager {
    private agents;
    private cleanupTimer;
    private engineQueue;
    private engineRunning;
    constructor();
    getOrCreate(agentId: string | undefined): AgentState;
    remove(agentId: string): void;
    cleanup(): void;
    destroy(): void;
    enqueueEngine<T>(op: () => Promise<T>): Promise<T>;
    private drainEngineQueue;
    /** 返回可持久化的 agent 列表（排除临时 agent）。 */
    getPersistableAgents(): Array<[string, {
        selectedInstance: InstanceRef | null;
        activeProfile: string;
    }]>;
}