/**
 * Shared recovery policy for prompt refinement ("enhance") across every
 * surface — TUI, CLI-hosted WebUI, and the standalone WebUI server. Keeping the
 * timeout escalation and fallback-model resolution here means all three surfaces
 * apply the SAME rule: a slow first attempt (a `timeout` failure) is retried
 * once with a longer window before the user is asked, and the one-key "retry
 * with another model" offer resolves to the same model everywhere.
 *
 * Pure + framework-free so it can be unit-tested in isolation and imported by
 * both the React TUI and the Node WebSocket servers.
 */
import type { Config } from '../types/config.js';
/** Default first-attempt refine window (mirrors `enhanceUserPrompt`'s default). */
export declare const ENHANCE_BASE_TIMEOUT_MS = 90000;
/** Floor for a retry window — a retry only helps if it's meaningfully longer. */
export declare const ENHANCE_MIN_RETRY_TIMEOUT_MS = 180000;
/**
 * Dedicated provider/model configured for prompt refinement, normalized as a
 * `provider/model` ref. The named refiner profile has precedence over the
 * explicit refiner provider/model, matching `/refiner` and goal refinement.
 * Returns undefined only when no dedicated refiner is configured; callers may
 * then deliberately fall back to the live session target.
 */
export declare function resolveConfiguredRefinerRef(config: Config): string | undefined;
/**
 * Timeout to use for a retry after a first attempt timed out. Prefers an
 * explicit `enhanceRetryTimeoutMs` config override; otherwise doubles the base
 * window, floored at {@link ENHANCE_MIN_RETRY_TIMEOUT_MS} so the "extra time"
 * is always a real increase over the (already generous) default.
 */
export declare function nextEnhanceTimeout(baseMs: number, config?: {
    enhanceRetryTimeoutMs?: number | undefined;
} | undefined): number;
/**
 * The `provider/model` ref offered as the one-key "retry with another model"
 * action on a refine failure, or `undefined` when nothing usable is available.
 * Prefers an explicit `enhanceFallbackModel`; otherwise reuses the first entry
 * of the agent's existing effective fallback chain (so a user who already
 * configured `fallbackModels` / has a smart-default chain gets a sensible
 * offer with zero extra config). Always normalized to `provider/model`.
 */
export declare function resolveEnhanceFallbackRef(config: Config): string | undefined;
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