import { t } from "structural";
import { SequenceIdTagged } from "../history.ts";
import { Config } from "../config.ts";
import { Transport } from "../transports/transport-common.ts";
export declare class ToolError extends Error {
    constructor(message: string);
}
export declare const USER_ABORTED_ERROR_MESSAGE = "Aborted by user";
export declare function attempt<T>(errMessage: string, callback: () => Promise<T>): Promise<T>;
export declare function attemptUntrackedStat(transport: Transport, signal: AbortSignal, path: string): Promise<void>;
export declare function attemptUntrackedRead(transport: Transport, signal: AbortSignal, path: string): Promise<string>;
export type ToolResult = {
    content: string;
    lines?: number;
};
export type ToolDef<T> = {
    ArgumentsSchema: t.Type<any>;
    Schema: t.Type<T>;
    validate: (abortSignal: AbortSignal, transport: Transport, t: T, cfg: Config) => Promise<null>;
    run: (abortSignal: AbortSignal, transport: Transport, t: SequenceIdTagged<{
        tool: T;
    }>, cfg: Config, modelOverride: string | null) => Promise<ToolResult>;
};