import type { IndexEntry, ListResult, LookupResult } from './config.ts';
export declare abstract class IndexCacheStore {
    abstract get(resourcePath: string): Promise<LookupResult>;
    abstract put(resourcePath: string, entry: IndexEntry): Promise<void>;
    abstract listDir(resourcePath: string): Promise<ListResult>;
    abstract setDir(resourcePath: string, entries: readonly [string, IndexEntry][], expiredAt?: Date | null): Promise<void>;
    abstract invalidateDir(resourcePath: string): Promise<void>;
    /**
     * Drop `resourcePath` and everything cached below it.
     *
     * `invalidateDir` drops one directory's listing and its direct children's
     * entries, which is enough for a mutation that named a path. A push
     * notification that can only name a scope needs the whole subtree gone,
     * because the listings further down were cached independently and nothing
     * above them expires them.
     *
     * Mirrors Python `IndexCacheStore.invalidate_prefix`.
     */
    abstract invalidatePrefix(resourcePath: string): Promise<void>;
    /**
     * Mark every entry stale without discarding it.
     *
     * The difference from `clear` is what a later lookup can tell. `clear`
     * leaves an empty store, which reads exactly like a store that was never
     * filled, so a backend whose index *is* its listing cannot tell an
     * invalidation from an empty repository. Expiring instead keeps that
     * distinction: the lookup answers EXPIRED and the backend refetches.
     */
    abstract invalidate(): Promise<void>;
    abstract clear(): Promise<void>;
    /**
     * Release whatever the store holds open. The default is a no-op:
     * an in-memory index owns nothing. A store backed by a connection
     * (redis) overrides this and must be idempotent — `close()` is
     * called once per owning resource, and a resource shared between
     * workspaces is closed by whichever one owns it.
     *
     * Mirrors Python `IndexCacheStore.close` (`cache/index/store.py`).
     */
    close(): Promise<void>;
}
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