kotlinx.serialization - JSON, Protobuf, custom serializers
Generates Kotlin serialization code with kotlinx.serialization for JSON, Protobuf, and custom serializers.
/plugin marketplace add pluginagentmarketplace/custom-plugin-kotlin/plugin install kotlin-assistant@pluginagentmarketplace-kotlinThis skill inherits all available tools. When active, it can use any tool Claude has access to.
assets/config.yamlassets/schema.jsonreferences/GUIDE.mdreferences/PATTERNS.mdscripts/validate.pyType-safe serialization with kotlinx.serialization.
@Serializable
data class User(
val id: Long,
val name: String,
@SerialName("email_address") val email: String,
val createdAt: Instant = Instant.now()
)
val json = Json {
ignoreUnknownKeys = true
encodeDefaults = true
prettyPrint = true
}
val user = json.decodeFromString<User>(jsonString)
val output = json.encodeToString(user)
object InstantSerializer : KSerializer<Instant> {
override val descriptor = PrimitiveSerialDescriptor("Instant", PrimitiveKind.LONG)
override fun serialize(encoder: Encoder, value: Instant) = encoder.encodeLong(value.toEpochMilli())
override fun deserialize(decoder: Decoder) = Instant.ofEpochMilli(decoder.decodeLong())
}
@Serializable
data class Event(
@Serializable(with = InstantSerializer::class) val timestamp: Instant
)
@Serializable
sealed class Response {
@Serializable @SerialName("success")
data class Success(val data: String) : Response()
@Serializable @SerialName("error")
data class Error(val message: String) : Response()
}
val json = Json { classDiscriminator = "type" }
| Issue | Resolution |
|---|---|
| "Serializer not found" | Add @Serializable or plugin |
| Unknown property fails | Set ignoreUnknownKeys = true |
Skill("kotlin-serialization")
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