import type { OpenMode } from '../../handles/mode.ts';
/**
 * The in-memory filesystem behind a monty guest's unmounted paths.
 *
 * The python binding hands monty an `OSAccess` subclass, and that base
 * class carries its own in-memory tree: a path no mount serves (a
 * guest temp file under `/tmp`, a scratch directory) is still a real
 * file to the guest. The JS binding is one bare callback with no tree
 * behind it — a declined call raises `PermissionError` — so this class
 * is that tree, host-side. Semantics and message spellings are pinned
 * to pydantic-monty's `os_access.py` (the exact strings a python-host
 * guest sees), with one deliberate improvement: renaming a file here
 * re-keys it fully, so the upstream rename-then-unlink KeyError the
 * python side works around (`MirageOSAccess._restamp`) cannot happen.
 *
 * One tree lives per `MirageOSAccess`, which is built per run: scratch
 * files last exactly one command, like python's.
 */
export declare class ScratchTree {
    private readonly root;
    private entryAt;
    private fileAt;
    private dirAt;
    private parentOf;
    exists(path: string): boolean;
    isFile(path: string): boolean;
    isDir(path: string): boolean;
    readText(path: string): string;
    readBytes(path: string): Uint8Array;
    write(path: string, data: string | Uint8Array): void;
    /**
     * Extend the file, keeping its storage type the way monty's tree
     * does: text appended to bytes decodes the base first, bytes onto
     * text encode it, so the stored shape tracks the most recent write.
     */
    append(path: string, data: string | Uint8Array): void;
    /**
     * The open-time effect for `open(path, mode)`, monty's own rules:
     * 'r' verifies the file exists and is not a directory, 'w' truncates
     * or creates, 'a' creates what is missing, 'x' refuses what exists.
     */
    open(path: string, mode: OpenMode): void;
    mkdir(path: string, parents: boolean, existOk: boolean): void;
    unlink(path: string): void;
    rmdir(path: string): void;
    /** The directory's entries as full paths, in insertion order. */
    iterdir(path: string): string[];
    rename(src: string, dst: string): void;
}
//# sourceMappingURL=tree.d.ts.map