import { Prompt } from "effect/unstable/ai";
import type { Entry } from "../context/session.js";
/** @experimental Provider-realistic fallback estimate for a prompt when no tokenizer is installed. */
export declare const estimatePromptTokens: (prompt: Prompt.Prompt) => number;
/** @experimental Provider-realistic fallback estimate for one session entry. */
export declare const estimateEntryTokens: (entry: Entry) => number;