/**
 * Provider-specific token limit utilities
 * Provides safe maxTokens values based on provider and model capabilities
 */
import { PROVIDER_MAX_TOKENS } from "../core/constants.js";
/**
 * Get the safe maximum tokens for a provider and model
 */
export declare function getSafeMaxTokens(provider: keyof typeof PROVIDER_MAX_TOKENS | string, model?: string, requestedMaxTokens?: number): number | undefined;
/**
 * Maximum output tokens supported by a given Anthropic Claude model.
 *
 * The native Vertex+Claude and native Anthropic message paths send `max_tokens`
 * straight to the Anthropic API, which returns 400 if the value exceeds the
 * model's published output ceiling. (The AI-SDK path clamps automatically;
 * these native paths do not.) This table lets those paths default to the
 * model's real ceiling — 64K for Sonnet/Haiku 4.x, 32K for Opus 4.x — instead of
 * the legacy 4096 that silently truncated large structured responses.
 *
 * Unknown identifiers fall back to a safe modern floor (8192).
 */
export declare function getClaudeMaxOutputTokens(model: string | undefined): number;
/**
 * Resolve the `max_tokens` to send on a native Anthropic/Claude request: honour
 * the caller's value but clamp it to the model's published ceiling, and default
 * to that ceiling when the caller did not specify one. Prevents both silent
 * truncation (the legacy 4096 default) and 400s from over-large requests.
 */
export declare function resolveClaudeMaxTokens(model: string | undefined, requested?: number): number;
/**
 * Validate if maxTokens is safe for a provider/model combination
 */
export declare function validateMaxTokens(provider: keyof typeof PROVIDER_MAX_TOKENS | string, model?: string, maxTokens?: number): {
    isValid: boolean;
    recommendedMaxTokens?: number;
    warning?: string;
};
/**
 * Get provider-specific token limit recommendations
 */
export declare function getTokenLimitRecommendations(provider: string): {
    conservative: number;
    balanced: number;
    maximum: number;
    models: Record<string, number>;
};
/**
 * Get all provider limits summary
 */
export declare function getAllProviderLimits(): Record<string, {
    default: number;
    models: Record<string, number>;
}>;