import type { ChatMessage, NativeToolCall } from "../types.js";
export declare const MAX_RETAINED_COMPLETED_TOOL_ARGUMENT_CHARS: number;
export declare const PROTOCOL_PLACEHOLDER_MARKER = "[context-note]";
export declare function normalizeToolHistoryEntries(messages: ChatMessage[]): number;
export declare function collapseElidedToolHistory(messages: ChatMessage[]): number;
export declare function parseCanonicalTextToolCalls(content: string): NativeToolCall[];
export declare function collapseOversizedToolHistory(messages: ChatMessage[]): number;