import type { SpaceConfig } from '../config/types.js';
import { type IndexSyncMode } from './run-sync.js';
import { getIndexSyncReason, INDEX_STALE_MS } from './sync.js';
export interface EnsureContentIndexOptions {
    preview?: boolean;
    /** Called when an automatic sync starts (missing, stale, or schema mismatch). */
    onRebuild?: (message: string) => void;
}
export interface EnsureContentIndexResult {
    syncedAt: string | null;
    stale: boolean;
    rebuilt: boolean;
    syncMode?: IndexSyncMode;
}
/**
 * Ensures the local content index exists and is current (schema v4, synced within 24h,
 * and not invalidated by a committed write). Auto-sync: full rebuild when missing, schema
 * outdated, or fully invalidated; incremental when only stale or incrementally invalidated.
 */
export declare function ensureContentIndex(space: SpaceConfig, opts?: EnsureContentIndexOptions): Promise<EnsureContentIndexResult>;
export { getIndexSyncReason, INDEX_STALE_MS };
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