import type { ApiClient } from './api-client';
import type { CachedProjectConfig, ProjectConfigResponse } from './types';
/**
 * Result of a project config sync attempt.
 *
 * `fromCache: true` indicates the response came from the on-disk fallback cache
 * (server was unreachable). The cache intentionally omits secrets (aws / backlog.apiKey
 * / envVars), so callers should preserve previously-applied secret state instead of
 * overwriting it with the cache-derived config.
 */
export interface SyncProjectConfigResult {
    config: ProjectConfigResponse;
    fromCache: boolean;
}
/**
 * Sync project config from server.
 * Returns the config if it was updated (different hash), or null if unchanged.
 */
export declare function syncProjectConfig(client: ApiClient, currentHash: string | undefined, projectDir: string | undefined, prefix: string): Promise<SyncProjectConfigResult | null>;
/**
 * Save project config to cache (excluding AWS credentials).
 * Uses atomic write (temp + rename) with 0o600 permissions.
 */
export declare function saveCachedConfig(projectDir: string, config: ProjectConfigResponse): void;
/**
 * Load cached project config.
 * Returns null if cache doesn't exist or is corrupted.
 */
export declare function loadCachedConfig(projectDir: string): CachedProjectConfig | null;
//# sourceMappingURL=project-config-sync.d.ts.map