import { type ExecResult, type ExecutionEnv, ExecutionError, FileError, type FileInfo, type Result } from "../internal/harness.js";
/**
 * A no-op ExecutionEnv for tool/MCP-only deployments (no shell, no filesystem).
 *
 * AgentHarness requires an `env`, but the normal tools+MCP code path never touches it.
 * Every filesystem op returns a `not_supported` FileError; `exec` returns `shell_unavailable`.
 * If a task genuinely needs shell/fs, supply a real ExecutionEnv instead (e.g. a Node or SSH one).
 */
export declare class StubExecutionEnv implements ExecutionEnv {
    cwd: string;
    /** design/380 O9a — declared on the class so the prepare fold can read the optional interface
     *  member off a `ExecutionEnv | StubExecutionEnv` union; the no-I/O stub produces no target
     *  content, so it never declares (always `undefined` — the trusted-side default). */
    readonly externalContentTarget?: boolean;
    /** `ExecutionEnv.cdPath`: the stub runs no shell, so no shell receives a `CDPATH`. */
    readonly cdPath: readonly string[];
    constructor(cwd?: string);
    private fsErr;
    absolutePath(path: string): Promise<Result<string, FileError>>;
    joinPath(): Promise<Result<string, FileError>>;
    readTextFile(path: string): Promise<Result<string, FileError>>;
    readTextLines(path: string): Promise<Result<string[], FileError>>;
    readBinaryFile(path: string): Promise<Result<Uint8Array, FileError>>;
    writeFile(path: string): Promise<Result<void, FileError>>;
    appendFile(path: string): Promise<Result<void, FileError>>;
    fileInfo(path: string): Promise<Result<FileInfo, FileError>>;
    listDir(path: string): Promise<Result<FileInfo[], FileError>>;
    canonicalPath(path: string): Promise<Result<string, FileError>>;
    exists(path: string): Promise<Result<boolean, FileError>>;
    createDir(path: string): Promise<Result<void, FileError>>;
    remove(path: string): Promise<Result<void, FileError>>;
    createTempDir(): Promise<Result<string, FileError>>;
    createTempFile(): Promise<Result<string, FileError>>;
    exec(): Promise<Result<ExecResult, ExecutionError>>;
    cleanup(): Promise<void>;
}