/**
 * RetryLlm — ILlm decorator that retries transient failures with exponential backoff.
 *
 * Composition order: RetryLlm → CircuitBreakerLlm → LlmAdapter
 * Retry sits outside the circuit breaker so that retry attempts are not
 * counted as separate failures.
 */
import type { ILlm, Message } from '@mcp-abap-adt/llm-agent';
import { type CallOptions, LlmError, type LlmResponse, type LlmStreamChunk, type LlmTool, type Result } from '@mcp-abap-adt/llm-agent';
export interface RetryOptions {
    /** Maximum number of retry attempts (total calls = maxAttempts + 1). Default: 3. */
    maxAttempts: number;
    /** Initial backoff delay in ms. Doubles each attempt. Default: 2000. */
    backoffMs: number;
    /** HTTP status codes that trigger retry. Default: [429, 500, 502, 503]. */
    retryOn: number[];
    /** Substrings in error message that trigger mid-stream retry (replays entire stream). Default: []. */
    retryOnMidStream: string[];
}
export declare class RetryLlm implements ILlm {
    private readonly inner;
    private readonly opts;
    healthCheck?: ILlm['healthCheck'];
    constructor(inner: ILlm, options?: Partial<RetryOptions>);
    get model(): string | undefined;
    chat(messages: Message[], tools?: LlmTool[], options?: CallOptions): Promise<Result<LlmResponse, LlmError>>;
    streamChat(messages: Message[], tools?: LlmTool[], options?: CallOptions): AsyncIterable<Result<LlmStreamChunk, LlmError>>;
    private isRetryable;
    private isMidStreamRetryable;
    private backoff;
}
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