export interface NodeRuntimeRef {
    nodePath: string;
    nodeVersion: string;
    nodeAbi: string;
}
export type ReleaseRef = {
    storage: "shared";
    artifactId: string;
    node: NodeRuntimeRef;
} | {
    storage: "legacy";
    runtimePath: string;
    node: NodeRuntimeRef;
};
export interface ReleaseSlots {
    current?: ReleaseRef;
    previous?: ReleaseRef;
    lastKnownGood?: ReleaseRef;
}
export declare function currentNodeRuntimeRef(): NodeRuntimeRef;
export declare function probeNodeRuntimeRef(nodePath: string): NodeRuntimeRef;
export declare function isReleaseRef(value: unknown): value is ReleaseRef;
export declare function isNodeRuntimeRef(value: unknown): value is NodeRuntimeRef;
export declare function isSafeIdentifier(value: unknown): value is string;
export declare function sameReleaseRef(left: ReleaseRef | undefined, right: ReleaseRef | undefined): boolean;