/**
 * Storage seam for the hidden recorder.
 *
 * A store holds the recorder's JSONL files keyed by path
 * (`/<day>/<session>.jsonl`). Implementations are infra adapters
 * (RAM, disk, opfs); everything above this seam (the Observer queries,
 * the /.bash_history view, the history builtin) is storage-agnostic.
 */
export interface ObserverStore {
    /** Append bytes to the file at path, creating it if missing. */
    append(path: string, data: Uint8Array): Promise<void>;
    /** Overwrite the file at path (snapshot restore). */
    write(path: string, data: Uint8Array): Promise<void>;
    /** Read every stored file, keyed by file path. */
    readAll(): Promise<Map<string, Uint8Array>>;
    /** Read only the files whose key ends with `suffix`. */
    readMatching(suffix: string): Promise<Map<string, Uint8Array>>;
    /** Delete every stored file (snapshot-restore rewind). */
    clear(): Promise<void>;
    /** Release any held connections or handles. */
    close(): Promise<void>;
}
/**
 * Shared ObserverStore behavior.
 *
 * Implementations only provide `append`/`write`/`readMatching`/`clear`;
 * `readAll` is reading with the empty suffix (every key matches), and
 * `close` defaults to a no-op for stores that hold no connections.
 * Mirrors Python `ObserverStoreBase`.
 */
export declare abstract class ObserverStoreBase implements ObserverStore {
    abstract append(path: string, data: Uint8Array): Promise<void>;
    abstract write(path: string, data: Uint8Array): Promise<void>;
    abstract readMatching(suffix: string): Promise<Map<string, Uint8Array>>;
    abstract clear(): Promise<void>;
    readAll(): Promise<Map<string, Uint8Array>>;
    close(): Promise<void>;
}
/** In-memory ObserverStore backed by a Map (the default). */
export declare class RAMObserverStore extends ObserverStoreBase {
    readonly files: Map<string, Uint8Array<ArrayBufferLike>>;
    append(path: string, data: Uint8Array): Promise<void>;
    write(path: string, data: Uint8Array): Promise<void>;
    readMatching(suffix: string): Promise<Map<string, Uint8Array>>;
    clear(): Promise<void>;
}
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