/**
 * Cross-session recall coordinator. One worker belongs to one provider/session generation; no
 * process-global transcript index is shared across sessions.
 */
import type { MemoryCapabilities, MemoryLifecycleContext, MemoryProvider } from "../memory-provider.ts";
export interface TranscriptRecallProviderOptions {
    workerSpecifier?: string | URL;
    maxPendingQueries?: number;
}
export declare class TranscriptRecallProvider implements MemoryProvider {
    readonly name = "transcript-recall";
    readonly egress = "local";
    private readonly workerSpecifier;
    private readonly maxPendingQueries;
    private worker;
    private generation;
    private requestId;
    private ready;
    private readyPromise;
    private resolveReady;
    private readonly pending;
    constructor(options?: TranscriptRecallProviderOptions);
    isAvailable(): boolean;
    getCapabilities(): MemoryCapabilities;
    initialize(sessionId: string, ctx: MemoryLifecycleContext): Promise<void>;
    shutdown(): Promise<void>;
    /** Event-driven readiness hook for tests and callers that can wait outside the foreground turn. */
    waitUntilReady(): Promise<void>;
    /** GC manages the dynamic recall page so stale pages pack while the newest are kept. */
    getContextMarkers(): string[];
    prefetch(query: string): Promise<string>;
    private handleWorkerMessage;
    private handleWorkerFailure;
    private finishReady;
    private finishQuery;
    private finishQueriesFor;
    private disposeWorker;
}
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