/**
 * Format tool results for the model context (not the UI spool).
 *
 * Philosophy:
 * - Full bodies stay on disk (artifact / job logs). Never invent "empty".
 * - Default: honest head+tail size cap — no keyword-rank "generic reduce".
 * - Optional structured polish only for known scanners (nmap/ffuf/…) that
 *   extract findings; noise should already be filtered at the command.
 * - Long work → background job + live file; point at path, use shell.tail.
 */
import type { ToolCall, ToolResult } from "../types.js";
export declare function saveToolOutput(call: ToolCall, output: string): Promise<string | undefined>;
/**
 * Truncate long tool output for the model. When `preferErrors` is set (failed
 * commands), keep error-bearing lines and a heavy tail so stack traces survive.
 * Never ranks by CVE/port keywords (that was genericReducer — removed).
 */
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;
};
/** One-line failure cue prepended when a tool returns ok=false. */
export declare function failureSummaryLine(result: {
    ok: boolean;
    exitCode?: number | undefined;
    output?: string | undefined;
}): string | undefined;
/** Legacy hard ceiling; effective cap comes from reliability policy (E2). */
export declare const PASSTHROUGH_CAP_CHARS_LEGACY = 400000;
/** Effective default model-context cap for tool bodies (E2). */
export declare function fsPassthroughCapChars(): number;
export declare function formatToolContext(call: ToolCall, result: ToolResult): string;