export declare const PROJECT_IDENTITY_VERSION: 1;
export declare const PROJECT_ID_PREFIX = "proj_";
export declare const PROJECT_IDENTITY_RELATIVE_PATH: string;
export interface ProjectIdentityFile {
    version: typeof PROJECT_IDENTITY_VERSION;
    projectId: string;
}
export interface EnsureProjectIdentityResult {
    identity: ProjectIdentityFile;
    created: boolean;
}
export interface RekeyProjectIdentityResult {
    previous?: ProjectIdentityFile | undefined;
    identity: ProjectIdentityFile;
}
export declare function projectIdentityPath(projectRoot: string): string;
export declare function createProjectId(seedTime?: number): string;
export declare function isProjectId(value: string): boolean;
export declare function readProjectIdentitySync(projectRoot: string): ProjectIdentityFile | undefined;
export declare function readProjectIdentity(projectRoot: string): Promise<ProjectIdentityFile | undefined>;
export declare function ensureProjectIdentity(projectRoot: string, idFactory?: () => string): Promise<EnsureProjectIdentityResult>;
export declare function rekeyProjectIdentity(projectRoot: string, idFactory?: () => string): Promise<RekeyProjectIdentityResult>;
/**
 * Keep runtime state ignored while allowing the small, explicitly shared
 * WrongStack project contract to travel with the repository.
 */
export declare function ensureProjectGitignore(projectRoot: string): Promise<void>;
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