/** Budget primitives. Notes/history use result.ts; reset/budget tools retain output(). */
export { earliestMatchOffsetChars } from "../text-match.js";
export declare const TOOL_OUTPUT_MAX_BYTES: number;
export declare const DEFAULT_READ_WINDOW_CHARS = 12000;
export declare const MAX_READ_WINDOW_CHARS = 50000;
export declare const HISTORY_PREVIEW_CHARS = 1200;
/** True when `text` fits the wire budget verbatim, for raw payloads with no JSON encoding. */
export declare function withinTextBudget(text: string, budget?: number): boolean;
/** Longest fitting code-point prefix, without inserted markers. Callers report omissions. */
export declare function prefixFit(text: string, fits: (content: string) => boolean): string;
/**
 * Encode a structured result through the common tool result boundary. `details` is slim
 * metadata for logs/UI (pi convention: never a second copy of the payload) and stays
 * undefined unless the tool has metadata worth persisting.
 */
export declare function output(value: unknown, details?: unknown, terminate?: boolean): {
    content: {
        type: "text";
        text: string;
    }[];
    details: unknown;
    terminate: boolean;
};