import { BucketBy } from './evaluation-details.interface';
export type FeatureFlagType = 'release' | 'experiment' | 'ops' | 'permission';
export interface FeatureFlagLifecycleMetadata {
    type?: FeatureFlagType;
    owner?: string;
    tags?: readonly string[];
    expiresAt?: string | Date;
    staleAt?: string | Date;
}
export interface FlagDefinition extends FeatureFlagLifecycleMetadata {
    defaultValue: boolean;
    description?: string;
    bucketBy?: BucketBy;
    trackExposure?: boolean;
}
export type FlagRegistry = Record<string, FlagDefinition>;
export type FlagKey<TFlags extends FlagRegistry> = Extract<keyof TFlags, string>;