Fix minor issues in types

Author: devcrocod

kotlin-sdk-core/src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/types/content.kt

@@ -91,6 +91,8 @@ public data class AudioContent(
  *
  * Hosts can use this to display file sizes and estimate context window usage.
  * @property mimeType The MIME type of this resource, if known.
+ * @property icons Optional set of sized icons that clients can display in their user interface.
+ * See [Icon] for supported formats and requirements.
  * @property description A description of what this resource represents.
  *
  * Clients can use this to improve the LLM’s understanding of available resources.
@@ -106,6 +108,7 @@ public data class ResourceLink(
     val title: String? = null,
     val size: Long? = null,
     val mimeType: String? = null,
+    val icons: List<Icon>? = null,
     val description: String? = null,
     val annotations: Annotations? = null,
     override val meta: JsonObject? = null,

kotlin-sdk-core/src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/types/jsonRpc.kt

@@ -206,10 +206,10 @@ public data class RPCError(val code: Int, val message: String, val data: JsonEle
     public object ErrorCode {
         // SDK-specific error codes
         /** Connection was closed */
-        public const val CONNECTION_CLOSED: Int = -1
+        public const val CONNECTION_CLOSED: Int = -32000
 
         /** Request timed out */
-        public const val REQUEST_TIMEOUT: Int = -2
+        public const val REQUEST_TIMEOUT: Int = -32001
 
         // Standard JSON-RPC 2.0 error codes
         /** Invalid JSON was received */
@@ -226,11 +226,5 @@ public data class RPCError(val code: Int, val message: String, val data: JsonEle
 
         /** Internal JSON-RPC error */
         public const val INTERNAL_ERROR: Int = -32603
-
-        /** Start of range for server-defined errors */
-        public const val SERVER_ERROR_START: Int = -32000
-
-        /** End of range for server-defined errors */
-        public const val SERVER_ERROR_END: Int = -32099
     }
 }

kotlin-sdk-core/src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/types/ping.kt

@@ -5,7 +5,9 @@ import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.Serializable
 
 @Serializable
-public data class PingRequest(override val params: BaseRequestParams? = null) : ServerRequest {
+public data class PingRequest(override val params: BaseRequestParams? = null) :
+    ClientRequest,
+    ServerRequest {
     @OptIn(ExperimentalSerializationApi::class)
     @EncodeDefault
     override val method: Method = Method.Defined.Ping

kotlin-sdk-core/src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/types/sampling.kt

@@ -5,6 +5,7 @@ import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.JsonObject
+import kotlin.jvm.JvmInline
 
 /**
  * Hints to use for model selection.
@@ -186,14 +187,12 @@ public data class CreateMessageResult(
     override val meta: JsonObject? = null,
 ) : ClientResult
 
+@JvmInline
 @Serializable
-public enum class StopReason {
-    @SerialName("endTurn")
-    EndTurn,
-
-    @SerialName("stopSequence")
-    StopSequence,
-
-    @SerialName("maxTokens")
-    MaxTokens,
+public value class StopReason(public val value: String) {
+    public companion object {
+        public val EndTurn: StopReason = StopReason("endTurn")
+        public val StopSequence: StopReason = StopReason("stopSequence")
+        public val MaxTokens: StopReason = StopReason("maxTokens")
+    }
 }