import type { ServedBackend } from "./modelBackend.js";
import { type ModelKind } from "./modelKind.js";
/** MLX models live under `<modelsDir>/mlx/<org>--<repo>/`. */
export declare const MLX_SUBDIR = "mlx";
/** The folder under the models directory that each served backend
 *  downloads into. Diffusers models live under
 *  `<modelsDir>/diffusers/<org>--<repo>/`, with the same record. */
export declare const SUBDIR_FOR_BACKEND: Record<ServedBackend, string>;
/** The per-model record: which revision the files came from and how much of
 *  each file is on disk. Written by the downloader, read by `list`, `serve`,
 *  and `remove`. */
export declare const RECORD_FILE = ".agency-model.json";
export type MlxFileRecord = {
    size: number;
    sha256?: string;
    complete: boolean;
    /** Indexes of the chunks already written, for a file still downloading. */
    chunks?: number[];
};
export type MlxModelRecord = {
    repo: string;
    revision: string;
    files: Record<string, MlxFileRecord>;
    /** What the model takes and returns, written when the download finished.
     *  Absent in records written before kinds existed, and for a directory
     *  whose files matched no rule; readers infer it then. */
    kind?: ModelKind;
};
export declare function mlxModelDirName(repo: string): string;
export declare function servedModelDir(cacheDir: string, backend: ServedBackend, repo: string): string;
/** The record in `dir`, or null when it is missing or not a valid record. */
export declare function readMlxModelRecord(dir: string): MlxModelRecord | null;
/** Replaces the file through a temp file and a rename, so a crash mid-write
 *  leaves the previous record. */
export declare function writeMlxModelRecord(dir: string, record: MlxModelRecord): void;
export declare function isMlxModelComplete(record: MlxModelRecord): boolean;