export declare const DEFAULT_OPENROUTER_MAX_OUTPUT_TOKENS = 8192;
export declare const DEFAULT_AI_SDK_MAX_OUTPUT_TOKENS = 4096;
export declare const DEFAULT_ANTHROPIC_MAX_OUTPUT_TOKENS = 8192;
export declare const DEFAULT_BUILDER_MAX_OUTPUT_TOKENS = 8192;
/** Cap for the first attempt of an interactive chat turn. */
export declare const MAIN_CHAT_MAX_OUTPUT_TOKENS_CAP = 32000;
/**
 * Cap used only when retrying a turn that came back with an empty final
 * response (see production-agent.ts's empty-final-response retry). Higher
 * than the first-attempt cap so the retry meaningfully raises the ceiling.
 */
export declare const EMPTY_RESPONSE_RETRY_MAX_OUTPUT_TOKENS_CAP = 64000;
/**
 * Resolve the max_output_tokens floor for the first attempt of an
 * interactive chat turn: min(model ceiling, 32K). Always at or above the
 * flat per-engine defaults above, regardless of whether the model is known.
 */
export declare function resolveMainChatMaxOutputTokens(modelId?: string): number;
/**
 * Resolve the max_output_tokens to use when retrying a turn after an empty
 * final response: min(model ceiling, 64K).
 */
export declare function resolveEmptyResponseRetryMaxOutputTokens(modelId?: string): number;
/** Anthropic's documented minimum extended-thinking budget. */
export declare const ANTHROPIC_MIN_THINKING_BUDGET_TOKENS = 1024;
/**
 * Clamp a requested Anthropic thinking budget so it leaves guaranteed
 * headroom under `maxOutputTokens` for non-thinking output, and stays within
 * the provider's valid range (>= 1024, < maxOutputTokens).
 */
export declare function clampThinkingBudgetTokens(requestedBudgetTokens: number, maxOutputTokens: number): number | undefined;
export declare function normalizeMaxOutputTokens(value: unknown, modelId?: string): number | null;
export declare function defaultMaxOutputTokensForEngine(engineName: string, modelId?: string): number;
export declare function resolveMaxOutputTokensForEngine(engineName: string, explicit?: unknown, modelId?: string): number;
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