Feature Flag Patterns

Architecture

FeatureFlagProvider Interface (Kotlin)

interface FeatureFlagProvider {
    fun getBooleanFlag(key: String, default: Boolean = false): Boolean
    fun getStringFlag(key: String, default: String = ""): String
    fun getIntFlag(key: String, default: Int = 0): Int
    fun getDoubleFlag(key: String, default: Double = 0.0): Double
    suspend fun refresh()
}

Type-Safe Flag Definitions