refactor(dsl)!: mark constructors in DSL builders as internal to restrict visibility

Author: kpavlov

kotlin-sdk-core/api/kotlin-sdk-core.api

@@ -3675,6 +3675,7 @@ public final class io/modelcontextprotocol/kotlin/sdk/types/RequestMeta$Companio
 }
 
 public final class io/modelcontextprotocol/kotlin/sdk/types/RequestMetaBuilder {
+	public fun <init> ()V
 	public final fun progressToken (I)V
 	public final fun progressToken (J)V
 	public final fun progressToken (Ljava/lang/String;)V

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

@@ -21,7 +21,7 @@ import kotlinx.serialization.json.buildJsonObject
  * @see AudioContentBuilder
  */
 @McpDsl
-public abstract class MediaContentBuilder {
+public abstract class MediaContentBuilder @PublishedApi internal constructor() {
     protected var annotations: Annotations? = null
     protected var meta: JsonObject? = null
 

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

@@ -155,7 +155,7 @@ public class ListPromptsRequestBuilder @PublishedApi internal constructor() : Pa
  * Creates a [GetPromptResult] using a type-safe DSL builder.
  *
  * ## Required
- * - [messages][GetPromptResultBuilder.messages] - List of prompt messages (at least one)
+ * - [messages][GetPromptResultBuilder.messagesList] - List of prompt messages (at least one)
  *
  * ## Optional
  * - [description][GetPromptResultBuilder.description] - Description of the prompt
@@ -260,7 +260,7 @@ public class GetPromptResultBuilder @PublishedApi internal constructor() : Resul
  * Creates a [ListPromptsResult] using a type-safe DSL builder.
  *
  * ## Required
- * - [prompts][ListPromptsResultBuilder.prompts] - List of available prompts (at least one)
+ * - [prompts][ListPromptsResultBuilder.promptsList] - List of available prompts (at least one)
  *
  * ## Optional
  * - [nextCursor][ListPromptsResultBuilder.nextCursor] - Pagination cursor for next page

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

@@ -21,7 +21,7 @@ import kotlinx.serialization.json.buildJsonObject
  * @see PaginatedRequestBuilder
  */
 @McpDsl
-public abstract class RequestBuilder {
+public abstract class RequestBuilder @PublishedApi internal constructor() {
     protected var meta: RequestMeta? = null
 
     /**
@@ -73,7 +73,7 @@ public abstract class RequestBuilder {
  * @see RequestBuilder.meta
  */
 @McpDsl
-public class RequestMetaBuilder internal constructor() {
+public class RequestMetaBuilder @PublishedApi internal constructor() {
     private val content: MutableMap<String, JsonElement> = linkedMapOf()
 
     /**
@@ -196,7 +196,7 @@ public class RequestMetaBuilder internal constructor() {
  * @see RequestBuilder
  */
 @McpDsl
-public abstract class PaginatedRequestBuilder : RequestBuilder() {
+public abstract class PaginatedRequestBuilder @PublishedApi internal constructor() : RequestBuilder() {
     /**
      * Optional pagination cursor for fetching the next page of results.
      *

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

@@ -16,7 +16,7 @@ import kotlinx.serialization.json.buildJsonObject
  * @see ServerResult
  */
 @McpDsl
-public abstract class ResultBuilder {
+public abstract class ResultBuilder @PublishedApi internal constructor() {
     protected var meta: JsonObject? = null
 
     /**
@@ -78,7 +78,7 @@ public abstract class ResultBuilder {
  * @see PaginatedResult
  */
 @McpDsl
-public abstract class PaginatedResultBuilder : ResultBuilder() {
+public abstract class PaginatedResultBuilder @PublishedApi internal constructor() : ResultBuilder() {
     /**
      * Optional pagination cursor for fetching the next page of results.
      *

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

@@ -84,7 +84,7 @@ public data class Tool(
 public data class ToolSchema(
     val properties: JsonObject? = null,
     val required: List<String>? = null,
-    @SerialName("\$defs")
+    @SerialName($$"$defs")
     val defs: JsonObject? = null,
 ) {
     @OptIn(ExperimentalSerializationApi::class)