import { type ApiFormat } from "./llm-format.js";
export interface LLMConfig {
    baseUrl: string;
    apiKey: string;
    model: string;
    maxTokens: number;
    timeoutMs?: number;
    maxAttempts?: number;
    apiFormat?: ApiFormat;
}
/**
 * Return an LLMConfig identical to `base` except `model` is swapped to
 * the provided value (v0.10.0 — per-stage model overrides). Pure;
 * defensive shallow-copy so callers can mutate the result safely.
 *
 * The base config carries auth, base URL, wire format, timeouts — all
 * shared across stages. Only `model` differs per phase, so this is the
 * minimum useful surface for the override.
 */
export declare function withModel(base: LLMConfig, model: string): LLMConfig;
export interface LLMMessage {
    role: "user" | "assistant";
    content: string;
}
export interface LLMResult {
    text: string;
    usage?: {
        input_tokens: number;
        output_tokens: number;
    };
}
export declare class LLMError extends Error {
    readonly status: number;
    readonly detail: string;
    constructor(status: number, message: string, detail?: string);
    get retriable(): boolean;
}
export declare const DEFAULT_LLM_TIMEOUT_MS = 120000;
export declare const DEFAULT_LLM_ATTEMPTS = 3;
export declare function callLLM(messages: LLMMessage[], system: string, config: LLMConfig, signal?: AbortSignal): Promise<LLMResult>;
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