import type { FileSystem } from "../ports/filesystem.js";
export declare const STATE_FILENAME = "state.md";
export declare class StateSaveResult {
    readonly ok: boolean;
    readonly reason?: string | undefined;
    private constructor();
    static success(): StateSaveResult;
    static rejected(reason: string): StateSaveResult;
}
export declare class StateLoadResult {
    readonly content: string | null;
    private constructor();
    static found(content: string): StateLoadResult;
    static empty(): StateLoadResult;
}
export declare function stateSave(content: string, opts: {
    stateDir: string;
    statePath: string;
    fs: FileSystem;
}): Promise<StateSaveResult>;
export declare function stateLoad(opts: {
    statePath: string;
    fs: FileSystem;
}): Promise<StateLoadResult>;
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