import type { HistoryEntry } from './components/history/types.js';
/**
 * Display history is a cache, not the canonical session record. Keep enough
 * recent output for useful scrolling while the complete JSONL session remains
 * available for resume/replay.
 */
export declare const TUI_HISTORY_MAX_ENTRIES = 400;
export declare const TUI_HISTORY_MAX_BYTES: number;
/** No single display entry may monopolize the aggregate history budget. */
export declare const TUI_HISTORY_MAX_ENTRY_BYTES: number;
/**
 * Enforce the per-entry display budget before aggregate history retention.
 * Common text entries keep a readable prefix; unusual oversized structured
 * entries degrade to a small marker rather than retaining an unbounded graph.
 */
export declare function retainTuiHistoryEntry(entry: HistoryEntry, maxBytes?: number): HistoryEntry;
export interface TuiHistoryBudget {
    maxEntries?: number | undefined;
    maxBytes?: number | undefined;
    maxEntryBytes?: number | undefined;
}
/**
 * Retain the newest display entries within both a count and serialized-byte
 * budget. The first banner that still fits after per-entry compaction is
 * preserved separately; later banners are discarded. If a banner cannot fit
 * even in compact form, it degrades to the same bounded transcript marker as
 * any other oversized structured entry. An omission marker replaces a
 * discarded transcript prefix. Returns the original array when no work is
 * needed so reducer callers can bail out without scheduling another render.
 */
export declare function retainTuiHistory(entries: HistoryEntry[], budget?: TuiHistoryBudget): HistoryEntry[];
//# sourceMappingURL=history-retention.d.ts.map