import type { DurableSessionState } from "#execution/durable-session-store.js";
import type { SessionInboxOwnership } from "#execution/session-inbox/inbox.js";
import type { TurnStepInput, TurnStepPayload } from "#execution/session/turn-step-types.js";
/** A durable-state transition; absent fields keep the cursor's current value. */
export interface SessionStateTransition {
    readonly serializedContext?: Record<string, unknown>;
    readonly sessionState?: DurableSessionState;
}
/**
 * The one mutable serialized-context / session-state pair owned by the
 * workflow executing a session. Steps return transitions; the cursor adopts
 * them and claims any continuation address a step introduced, so every hook
 * the session answers to is registered before the next step runs.
 */
export declare class SessionStateCursor {
    readonly sessionWritable: WritableStream<Uint8Array>;
    private readonly inbox;
    private currentSerializedContext;
    private currentSessionState;
    constructor(input: {
        readonly inbox: Pick<SessionInboxOwnership, "claimSessionHooks">;
        readonly sessionWritable: WritableStream<Uint8Array>;
        readonly serializedContext: Record<string, unknown>;
        readonly sessionState: DurableSessionState;
    });
    get serializedContext(): Record<string, unknown>;
    get sessionState(): DurableSessionState;
    /** Applies a transition after claiming every continuation address it introduced. */
    apply(transition: SessionStateTransition): Promise<void>;
    createStepInput(input: TurnStepPayload | undefined, signals: Pick<TurnStepInput, "abortSignal" | "steeringSignal">): TurnStepInput;
}