import type { PackageManager } from "../utils/packageManager";
export type PatchBackup = {
    file: string;
    /** `null` when the file did not exist before patches were applied. */
    content: string | null;
};
export type FeatureArtifacts = {
    copiedFiles: string[];
    patchBackups: PatchBackup[];
};
export type FeatureEntry = {
    id: string;
    version: string;
    addedAt: string;
    artifacts?: FeatureArtifacts;
};
export type IrwinRegistry = {
    irwinCliVersion: string;
    tsRails: string;
    packageManager?: PackageManager;
    features: FeatureEntry[];
};
export declare function registryPath(projectRoot: string): string;
export declare function readRegistry(projectRoot: string): IrwinRegistry;
export declare function writeRegistry(projectRoot: string, registry: IrwinRegistry): void;
export declare function isFeatureEnabled(registry: IrwinRegistry, featureId: string): boolean;