import type { PendingInjection } from "./types.js";
export declare const MAX_PENDING_RUNTIME_CONTEXTS_PER_SESSION = 16;
export declare const MAX_TRACKED_RUNTIME_SESSIONS = 64;
export type RuntimeContextDeliveryState = "offered" | "tool-output-emitted" | "model-input-observed" | "model-input-fallback" | "duplicate-suppressed";
export type PendingInjectionOffer = {
    readonly accepted: boolean;
    readonly digest: string;
    readonly kind: "offered" | "duplicate-suppressed" | "bounded";
    readonly injection?: PendingInjection;
};
export type RuntimeContextDelivery = {
    readonly digest: string;
    readonly sectionDigests: readonly string[];
    state: RuntimeContextDeliveryState;
};
export declare class PendingInjectionStore {
    private readonly pendingBySession;
    private readonly deliveryBySession;
    private readonly sectionDigestsBySession;
    private readonly trackedSessions;
    set(sessionId: string, injection: PendingInjection): PendingInjectionOffer;
    take(sessionId: string): PendingInjection | undefined;
    takeForModelInput(sessionId: string): PendingInjection | undefined;
    markToolOutputEmitted(sessionId: string, digest: string): void;
    markModelInputObserved(sessionId: string, digest: string): void;
    markModelInputFallback(sessionId: string, digest: string): void;
    markDuplicateSuppressed(sessionId: string, digest: string): void;
    delivery(sessionId: string, digest: string): RuntimeContextDelivery | undefined;
    pendingCount(sessionId: string): number;
    clearSession(sessionId: string): void;
    private trackSession;
    private removePending;
    private setState;
}