/**
 * Bounded outbound retry for channel deliveries.
 *
 * The core wraps every registered adapter's delivery methods (sendText /
 * sendCard / promptChoice / closeMenu) so a transient channel failure —
 * network blip, 429, 5xx — retries a few times with jittered exponential
 * backoff instead of silently dropping a user-visible message. streamText is
 * deliberately NOT retried: a partially-streamed reply cannot be resumed, and
 * restarting it would duplicate the streaming card.
 * @module dsh-connect/retry
 */
import type { ChannelAdapter } from "./types.js";
export interface RetryOptions {
    /** Total attempts including the first call (default 3). */
    attempts?: number;
    /** Base delay between attempts in ms (default 250). */
    baseDelayMs?: number;
    /** Cap for a single delay in ms (default 2000). */
    maxDelayMs?: number;
    /**
     * Decide whether an error is worth retrying. Defaults to retrying every
     * error — bounded attempts keep permanent failures cheap (a few extra
     * channel calls), while transient ones actually recover.
     */
    isTransient?: (error: unknown) => boolean;
}
/** Run `fn` with bounded, jittered exponential backoff on failure. */
export declare function retry<T>(fn: () => Promise<T>, options?: RetryOptions): Promise<T>;
/**
 * Wrap an adapter so its delivery methods retry transient failures.
 * Non-delivery faces (start/stop/onInbound) and streamText pass through
 * untouched.
 *
 * Every *optional* member of `ChannelAdapter` must be forwarded here by hand —
 * this builds a fresh object, so anything not named below is dropped from the
 * adapter the service actually holds. That is not hypothetical: `sendFile` was
 * silently lost this way, which made `runner.ts`'s `this.adapter.sendFile ===
 * undefined` check always true and degraded `/send <path>` to sending the path
 * as text on every channel. There is a test for the passthrough list; extend it
 * rather than adding a member to `ChannelAdapter` alone.
 */
export declare function withOutboundRetry(adapter: ChannelAdapter, options?: RetryOptions): ChannelAdapter;
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