Feature Flag Patterns

Feature flag strategies for safe deployments, experimentation, and operational control.

Flag Types and Structure

interface FeatureFlag {
  key: string
  type: 'boolean' | 'percentage' | 'variant' | 'segment'
  enabled: boolean
  description: string
  owner: string              // Team/person responsible
  createdAt: Date
  expiresAt?: Date           // Auto-cleanup reminder
  tags: string[]             // 'release', 'experiment', 'ops', 'permission'
}