import type { Hook, HookContext, HookResult } from '../hooks/types.js';
import type { Middleware, MiddlewareContext } from '../middleware/types.js';
import type { ObservabilityManager } from './sink.js';
export interface ObservabilityMiddlewareOptions {
    captureInput?: boolean;
    captureOutput?: boolean;
}
export declare class ObservabilityMiddleware implements Middleware {
    private readonly manager;
    private readonly options;
    readonly name = "observability";
    private iterationSpans;
    private toolSpans;
    /** 孤儿条目清理间隔（5 分钟） */
    private static readonly CLEANUP_INTERVAL_MS;
    /** 条目最大存活时间（30 分钟，超时自动清理防止内存泄漏） */
    private static readonly MAX_ENTRY_TTL_MS;
    private lastCleanup;
    constructor(manager: ObservabilityManager, options?: ObservabilityMiddlewareOptions);
    /** 定期清理孤儿条目，防止因异常未触发 after 回调导致内存泄漏 */
    private maybeCleanup;
    before(ctx: MiddlewareContext): Promise<void>;
    after(ctx: MiddlewareContext): Promise<void>;
    onToolBefore(ctx: HookContext): Promise<HookResult | void>;
    onToolAfter(ctx: HookContext): Promise<HookResult | void>;
}
export declare function createObservabilityHooks(manager: ObservabilityManager, options?: ObservabilityMiddlewareOptions): Hook[];
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