/**
 * Embedding Provider 健康检查
 *
 * 检测 embedding provider 是否可用：
 * - 读取配置（embedding.provider / embedding.model / embedding.baseUrl）
 * - 尝试连接并生成一个测试 embedding
 * - 不可用时抛出友好错误 + 修复引导
 */
import type { EmbeddingBackendConfig } from '../config/types.js';
export declare class EmbeddingNotConfiguredError extends Error {
    constructor();
}
export declare class EmbeddingUnreachableError extends Error {
    constructor(baseUrl: string);
}
export declare class EmbeddingModelNotLoadedError extends Error {
    constructor(model: string);
}
export interface HealthCheckResult {
    ok: boolean;
    provider: string;
    model: string;
    baseUrl: string;
    dimensions?: number;
    error?: string;
}
/**
 * Read embedding config from kivo.config.json in the given directory.
 * Returns null if no embedding config is found.
 */
export declare function readEmbeddingConfig(dir?: string): EmbeddingBackendConfig | null;
/**
 * Check if the embedding provider is healthy.
 * Throws a descriptive error if not.
 */
export declare function checkEmbeddingHealth(dir?: string): Promise<HealthCheckResult>;
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