import type { ToolCall, ToolResult } from "../types.js";
export declare function saveToolOutput(call: ToolCall, output: string): Promise<string | undefined>;
export declare function summarizeOutput(output: string, maxChars?: number, opts?: {
    preferErrors?: boolean;
}): {
    text: string;
    truncated: boolean;
};
export declare function summarizeFetchOutput(output: string, maxChars: number, opts?: {
    preferErrors?: boolean;
}): {
    text: string;
    truncated: boolean;
};
export declare function failureSummaryLine(result: {
    ok: boolean;
    exitCode?: number | undefined;
    output?: string | undefined;
}): string | undefined;
export declare const PASSTHROUGH_CAP_CHARS_LEGACY = 400000;
export declare function fsPassthroughCapChars(): number;
export declare function formatToolContext(call: ToolCall, result: ToolResult): string;