import type { KiroHistoryEntry, KiroToolSpec } from "./transform.js";
export declare const HISTORY_LIMIT = 850000;
/** The context window size (in tokens) that HISTORY_LIMIT was calibrated for. */
export declare const HISTORY_LIMIT_CONTEXT_WINDOW = 200000;
/** Remove images from history entries — they've already been processed by the
 *  model in previous turns and re-sending them wastes context / causes 413s. */
export declare function stripHistoryImages(history: KiroHistoryEntry[]): KiroHistoryEntry[];
export declare function sanitizeHistory(history: KiroHistoryEntry[]): KiroHistoryEntry[];
export declare function injectSyntheticToolCalls(history: KiroHistoryEntry[]): KiroHistoryEntry[];
export declare function truncateHistory(history: KiroHistoryEntry[], limit: number): KiroHistoryEntry[];
export declare function extractToolNamesFromHistory(history: KiroHistoryEntry[]): Set<string>;
export declare function addPlaceholderTools(tools: KiroToolSpec[], history: KiroHistoryEntry[]): KiroToolSpec[];
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