/**
 * The last view of a conversation a person left, so reopening it draws at once
 * and then revalidates behind it.
 *
 * - It lives in the client-scoped shared-query store and inherits its privacy
 *   model: nothing is kept unless the host retains reads for that client
 *   (`OpenGeniProvider retainReadsAcrossMounts`, or `useRetainedReads(client)`),
 *   which hosts do only when every signed-in person gets their own client.
 *   Releasing the retention (sign-out, account switch) drops it. It is held in
 *   memory only; nothing is written to the device.
 * - Each read hook writes its last authoritative value when it leaves a
 *   conversation and shows the retained value only until its own first read
 *   for that conversation lands. Every open still reads every resource once;
 *   the retained view only removes the wait before the first paint.
 * - A read that says the person may no longer see the conversation (401,
 *   403, 404), or that the retained value no longer exists (a cleared goal),
 *   drops what was kept at once.
 * - Retained event windows together stay within one open conversation's
 *   window budget; the least recently left conversation goes first.
 */
export type SessionViewPart = "events" | "detail" | "queue" | "human-input" | "goal" | "lineage";
/** The value a hook left for this conversation, if the host retains reads. */
export declare function peekSessionView<T>(client: object, workspaceId: string, sessionId: string, part: SessionViewPart): T | null;
/** A read failure that means the retained view must not be shown again. */
export declare function deniesRetainedView(error: unknown): boolean;
/**
 * Show what this hook left for the conversation until `current` (its own
 * authoritative value) exists, and leave `current` behind when the hook moves
 * to another conversation or unmounts. Returns the retained value, or null.
 * `discard` (a denied read, or an authoritative "there is none") drops the
 * retained value now and keeps nothing for this conversation.
 */
export declare function useRetainedSessionView<T extends object>(client: object, workspaceId: string, sessionId: string | null | undefined, part: SessionViewPart, current: T | null, options: {
    enabled: boolean;
    bytes?: ((value: T) => number) | undefined;
    budgetBytes?: number | undefined;
    discard?: boolean | undefined;
}): T | null;