/**
 * Pure math for capping the TUI transcript that is re-rendered on reload/resume.
 *
 * These functions estimate wrapped line counts for agent messages and select the
 * tail of a message list that fits within the reload budget, trimming an oversized
 * head message when needed. They read only their arguments and hold no UI or session
 * state, so they live outside interactive-mode and are unit-testable in isolation.
 */
import type { AgentMessage } from "@caupulican/pi-agent-core";
import type { Message } from "@caupulican/pi-ai";
export declare const TUI_HISTORY_RELOAD_MAX_LINES = 1000;
export declare const TUI_HISTORY_RELOAD_WRAP_WIDTH = 100;
export interface TuiHistoryReloadOptions {
    /** Read tool-result content while sizing history. False when tool output is collapsed. */
    includeToolResultContent?: boolean;
}
export declare function getContentText(content: unknown): string;
export declare function getUserMessageText(message: Message): string;
export declare function getTuiHistoryMessageText(message: AgentMessage): string;
export declare function estimateTuiHistoryLines(message: AgentMessage, options?: TuiHistoryReloadOptions): number;
export declare function trimTextToTuiHistoryTail(text: string, maxEstimatedLines: number): string;
export declare function trimMessageToTuiHistoryTail(message: AgentMessage, maxEstimatedLines: number): AgentMessage;
export declare function messagesForTuiHistoryReload(messages: AgentMessage[], options?: TuiHistoryReloadOptions): {
    messages: AgentMessage[];
    omittedMessages: number;
    estimatedLines: number;
};
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