export interface SandboxBuild {
    readonly base: string;
    readonly baseDigest?: string | undefined;
    readonly overlay?: string | undefined;
}
export declare const builtFromCheckout: (build: Pick<SandboxBuild, "base">) => boolean;
export declare const rebuildPending: (desired: string | undefined, running: string | undefined) => boolean;
export declare const buildParity: (parent: SandboxBuild, other: SandboxBuild | undefined) => "current" | "outdated" | "unknown";
export interface RunningSandbox {
    readonly build: SandboxBuild;
    readonly bootedAt: number;
}
export declare const sameBuild: (a: SandboxBuild, b: SandboxBuild) => boolean | undefined;
export interface SwapAim {
    readonly from: RunningSandbox | undefined;
    readonly overlay?: string | undefined;
}
export type SwapVerdict = "landed" | "unmoved" | "waiting";
export declare const swapVerdict: (aim: SwapAim, now: RunningSandbox) => SwapVerdict;
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