/**
 * Runtime-detected default storage backend.
 *
 * Imported via `@lostgradient/weft/storage/auto`. Resolves a persistent
 * storage adapter appropriate for the current runtime:
 *
 *   1. Bun -> `BunSQLiteStorage`
 *   2. Node -> `NodeSQLiteStorage`
 *   3. WebExtension -> `WebExtensionStorage`
 *   4. Browser / Service Worker -> `IndexedDBStorage`
 *   5. otherwise -> throw
 *
 * SQLite path policy:
 *   - `process.env.WEFT_DEFAULT_STORAGE_PATH` if set
 *   - else `${tmpdir()}/weft-default/<cwd-hash>.db`
 *
 * The parent directory is created (recursive) before the SQLite path is
 * returned. Browser and extension adapters use their own defaults.
 *
 * `resolveDefaultStorage()` is for developer convenience. Production
 * deployments should pick an explicit adapter and pass it to
 * `new Engine({ storage })`.
 *
 * @module @lostgradient/weft/storage/auto
 */
import type { Storage as WeftStorage } from './interface.ts';
type RuntimeGlobalsLike = {
    Bun?: unknown;
    browser?: {
        storage?: unknown;
    };
    chrome?: {
        storage?: unknown;
    };
    indexedDB?: unknown;
    IDBKeyRange?: unknown;
    process?: {
        cwd?: () => string;
        env?: Record<string, string | undefined>;
        versions?: {
            node?: unknown;
        };
    };
};
/**
 * Resolve a runtime-appropriate persistent storage adapter.
 *
 * Bun and Node resolve to SQLite. WebExtension contexts resolve to
 * `WebExtensionStorage`; browser and Service Worker contexts with IndexedDB
 * resolve to `IndexedDBStorage`.
 *
 * @example
 * ```ts
 * import { Engine } from '@lostgradient/weft';
 * import { resolveDefaultStorage } from '@lostgradient/weft/storage/auto';
 *
 * await using storage = await resolveDefaultStorage();
 * await using engine = new Engine({ storage });
 * void engine;
 * ```
 */
export declare function resolveDefaultStorage(runtimeGlobals?: RuntimeGlobalsLike): Promise<WeftStorage>;
export {};