import type { Tool } from "@mariozechner/pi-ai";
import type { AgentHistoryRecord } from "@/types";
export type ContextEstimateTokensExtras = {
    systemPrompt?: string;
    tools?: Tool[];
    extraText?: string[];
    extraValues?: unknown[];
    extraTokens?: number;
};
/**
 * Estimates total tokens using history records plus heuristic extras.
 * Expects: history records are ordered; extras include raw strings or values.
 */
export declare function contextEstimateTokensWithExtras(history: AgentHistoryRecord[], extras?: ContextEstimateTokensExtras): number;
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