/**
 * Configuration validation for recursive-llm-ts.
 *
 * Validates RLMConfig at construction time with clear error messages.
 */
import { RLMConfig } from './bridge-interface';
import { CacheConfig } from './cache';
import { RetryConfig, FallbackConfig } from './retry';
export interface RLMExtendedConfig extends RLMConfig {
    /** Cache configuration */
    cache?: CacheConfig;
    /** Retry configuration */
    retry?: RetryConfig;
    /** Fallback model configuration */
    fallback?: FallbackConfig;
    /** LiteLLM passthrough parameters */
    litellm_params?: Record<string, unknown>;
}
export type ValidationLevel = 'error' | 'warning' | 'info';
export interface ValidationIssue {
    level: ValidationLevel;
    field: string;
    message: string;
}
export interface ValidationResult {
    valid: boolean;
    issues: ValidationIssue[];
}
/**
 * Validate an RLM configuration.
 * Returns issues rather than throwing, allowing callers to handle gracefully.
 */
export declare function validateConfig(config: RLMExtendedConfig): ValidationResult;
/**
 * Validate config and throw on errors. Logs warnings.
 */
export declare function assertValidConfig(config: RLMExtendedConfig): void;