Kotlin · Mr3zee · Oct 7, 2025 · Sep 30, 2025 · Sep 30, 2025 · Sep 30, 2025
diff --git a/.github/workflows/changelog.yml b/.github/workflows/changelog.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 

diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
@@ -30,7 +30,7 @@ env:
   ALGOLIA_INDEX_NAME: 'prod_kotlin_rpc'
   ALGOLIA_KEY: '${{ secrets.ALGOLIA_KEY }}'
   CONFIG_JSON_PRODUCT: 'kotlinx-rpc'
-  CONFIG_JSON_VERSION: '0.9.1'
+  CONFIG_JSON_VERSION: '0.10.0'
   DOKKA_ARTIFACT: 'dokka.zip'
   ASSEMBLE_DIR: '__docs_assembled'
   ASSEMBLE_ARTIFACT: 'assembled.zip'
@@ -40,7 +40,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
@@ -67,7 +67,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: kotlinx-rpc
           path: artifacts
@@ -83,12 +83,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
       - name: Download Writerside artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: kotlinx-rpc
 
@@ -140,7 +140,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: kotlinx-rpc-assembled
 
@@ -151,7 +151,7 @@ jobs:
         uses: actions/configure-pages@v5
 
       - name: Package and upload Pages artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: publish
 
@@ -167,7 +167,7 @@ jobs:
       image: registry.jetbrains.team/p/writerside/builder/algolia-publisher:2.0.32-3
     steps:
       - name: Download artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: kotlinx-rpc
       - name: Unzip artifact

diff --git a/.github/workflows/platforms.yml b/.github/workflows/platforms.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
       - name: Setup Gradle

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,3 +1,56 @@
+# 0.10.0
+> Published 1 October 2025
+
+## Overview
+This release brings a lot of changes, work:
+- Kotlin 2.2.20 and 2.2.10 support
+- kRPC: Backpressure
+
+To read about the backpressure feature, 
+see the updated [kRPC Configuration](https://kotlin.github.io/kotlinx-rpc/configuration.html#connector-dsl) page.
+
+### Breaking Changes 🔴
+* Allow suspend calls inside ktor rpc builder #433 by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/439
+
+### Features 🎉
+* Kotlin 2.2.20 by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/478
+* Kotlin 2.2.10 by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/456
+* kRPC: Backpressure by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/462
+* Add support for Wasm/Wasi to krpc #465 by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/480
+
+### Bug fixes 🐛
+* Add collect once check for client streams by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/431
+* Fix diagnostic rendering for compiler plugins checkers by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/432
+* fix wrong unchecked null cast (potential NPE) by @y9maly in https://github.com/Kotlin/kotlinx-rpc/pull/445
+
+### Documentation 📗
+* Docs for gRPC with Ktor by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/394
+* Add a doc for KMP source sets with gRPC by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/405
+* Update strict-mode.topic by @BierDav in https://github.com/Kotlin/kotlinx-rpc/pull/440
+* Update grpc-configuration.topic by @flockbastian in https://github.com/Kotlin/kotlinx-rpc/pull/450
+* Added docs for release by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/482
+* Fix typo in docs grpc-configuration.topic by @sebaslogen in https://github.com/Kotlin/kotlinx-rpc/pull/495
+
+### Infra 🚧
+* Fix docs yaml and signing tasks by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/404
+* Fix jdk resolution problems on CI by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/406
+* Use compat-patrouille for compatibility settings by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/438
+
+### Other Changes 🧹
+* Fix how we create 'publishMavenArtifact' tasks by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/416
+* Update grpc-sample app by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/425
+* Fix LV and signing by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/424
+* Update ktor-all-platforms-app sample to sync service creation by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/455
+* Added Ktor closure tests and Cancellation tests, + minor fixes  by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/479
+* Fix flaky tests by @Mr3zee in https://github.com/Kotlin/kotlinx-rpc/pull/481
+
+## New Contributors
+* @flockbastian made their first contribution in https://github.com/Kotlin/kotlinx-rpc/pull/450
+* @y9maly made their first contribution in https://github.com/Kotlin/kotlinx-rpc/pull/445
+* @sebaslogen made their first contribution in https://github.com/Kotlin/kotlinx-rpc/pull/495
+
+**Full Changelog**: https://github.com/Kotlin/kotlinx-rpc/compare/0.9.1...0.10.0
+
 # 0.9.1
 > Published 17 July 2025
 

diff --git a/README.md b/README.md
@@ -7,7 +7,7 @@
 
 [![Kotlin Experimental](https://kotl.in/badges/experimental.svg)](https://kotlinlang.org/docs/components-stability.html)
 [![Official JetBrains project](http://jb.gg/badges/official.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)
-[![Kotlin](https://img.shields.io/badge/kotlin-2.0.0--2.2.10-blue.svg?logo=kotlin)](http://kotlinlang.org)
+[![Kotlin](https://img.shields.io/badge/kotlin-2.0.0--2.2.20-blue.svg?logo=kotlin)](http://kotlinlang.org)
 [![GitHub License](https://img.shields.io/badge/license-Apache%20License%202.0-blue.svg?style=flat)](http://www.apache.org/licenses/LICENSE-2.0)
 
 [//]: # ([![TeamCity build]&#40;https://img.shields.io/teamcity/build/s/Build_kRPC_All.svg?server=http%3A%2F%2Fkrpc.teamcity.com&#41;]&#40;https://teamcity.jetbrains.com/viewType.html?buildTypeId=Build_kRPC_All&guest=1&#41;)
@@ -102,7 +102,7 @@ To ensure that all IDE features of our compiler plugin work properly on IntelliJ
 We support all stable Kotlin versions starting from 2.0.0:
 - 2.0.0, 2.0.10, 2.0.20, 2.0.21
 - 2.1.0, 2.1.10, 2.1.20, 2.1.21
-- 2.2.0, 2.2.10
+- 2.2.0, 2.2.10, 2.2.20
 
 For a full compatibility checklist,
 see [Versions](https://kotlin.github.io/kotlinx-rpc/versions.html).
@@ -134,9 +134,9 @@ that will set up code generation in a project.
 Example of a setup in a project's `build.gradle.kts`:
 ```kotlin
 plugins {
-    kotlin("multiplatform") version "2.2.10"
-    kotlin("plugin.serialization") version "2.2.10"
-    id("org.jetbrains.kotlinx.rpc.plugin") version "0.9.1"
+    kotlin("multiplatform") version "2.2.20"
+    kotlin("plugin.serialization") version "2.2.20"
+    id("org.jetbrains.kotlinx.rpc.plugin") version "0.10.0"
 }
 ```
 
@@ -151,15 +151,15 @@ And now you can add dependencies to your project:
 ```kotlin
 dependencies {
     // Client API
-    implementation("org.jetbrains.kotlinx:kotlinx-rpc-krpc-client:0.9.1")
+    implementation("org.jetbrains.kotlinx:kotlinx-rpc-krpc-client:0.10.0")
     // Server API
-    implementation("org.jetbrains.kotlinx:kotlinx-rpc-krpc-server:0.9.1") 
+    implementation("org.jetbrains.kotlinx:kotlinx-rpc-krpc-server:0.10.0") 
     // Serialization module. Also, protobuf and cbor are provided
-    implementation("org.jetbrains.kotlinx:kotlinx-rpc-krpc-serialization-json:0.9.1") 
+    implementation("org.jetbrains.kotlinx:kotlinx-rpc-krpc-serialization-json:0.10.0") 
 
     // Transport implementation for Ktor
-    implementation("org.jetbrains.kotlinx:kotlinx-rpc-krpc-ktor-client:0.9.1")
-    implementation("org.jetbrains.kotlinx:kotlinx-rpc-krpc-ktor-server:0.9.1")
+    implementation("org.jetbrains.kotlinx:kotlinx-rpc-krpc-ktor-client:0.10.0")
+    implementation("org.jetbrains.kotlinx:kotlinx-rpc-krpc-ktor-server:0.10.0")
 
     // Ktor API
     implementation("io.ktor:ktor-client-cio-jvm:$ktor_version")

diff --git a/.../kotlinx/rpc/codegen/RpcCompilerPlugin.kt → ...nx/rpc/codegen/RpcCommandLineProcessor.kt b/.../kotlinx/rpc/codegen/RpcCompilerPlugin.kt → ...nx/rpc/codegen/RpcCommandLineProcessor.kt
@@ -4,18 +4,14 @@
 
 package kotlinx.rpc.codegen
 
-import kotlinx.rpc.codegen.extension.RpcIrExtension
-import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
 import org.jetbrains.kotlin.compiler.plugin.AbstractCliOption
 import org.jetbrains.kotlin.compiler.plugin.CommandLineProcessor
-import org.jetbrains.kotlin.compiler.plugin.CompilerPluginRegistrar
 import org.jetbrains.kotlin.compiler.plugin.ExperimentalCompilerApi
 import org.jetbrains.kotlin.config.CompilerConfiguration
-import org.jetbrains.kotlin.fir.extensions.FirExtensionRegistrarAdapter
 
 @OptIn(ExperimentalCompilerApi::class)
 class RpcCommandLineProcessor : CommandLineProcessor {
-    override val pluginId = "kotlinx-rpc"
+    override val pluginId = PLUGIN_ID
 
     override val pluginOptions = listOf(
         RpcFirCliOptions.ANNOTATION_TYPE_SAFETY,
@@ -37,20 +33,3 @@ class RpcCommandLineProcessor : CommandLineProcessor {
         }
     }
 }
-
-@OptIn(ExperimentalCompilerApi::class)
-class RpcCompilerPlugin : CompilerPluginRegistrar() {
-    override val supportsK2: Boolean = true
-
-    override fun ExtensionStorage.registerExtensions(configuration: CompilerConfiguration) {
-        registerRpcExtensions(configuration)
-    }
-}
-
-@OptIn(ExperimentalCompilerApi::class)
-fun CompilerPluginRegistrar.ExtensionStorage.registerRpcExtensions(configuration: CompilerConfiguration) {
-    VersionSpecificApi.INSTANCE = VersionSpecificApiImpl
-
-    IrGenerationExtension.registerExtension(RpcIrExtension(configuration))
-    FirExtensionRegistrarAdapter.registerExtension(FirRpcExtensionRegistrar(configuration))
-}
diff --git a/compiler-plugin/compiler-plugin-cli/src/main/kotlin/kotlinx/rpc/codegen/pluginId.kt b/compiler-plugin/compiler-plugin-cli/src/main/kotlin/kotlinx/rpc/codegen/pluginId.kt
@@ -0,0 +1,7 @@
+/*
+ * Copyright 2023-2025 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.rpc.codegen
+
+const val PLUGIN_ID = "org.jetbrains.kotlinx.rpc"
diff --git a/...r-plugin/compiler-plugin-cli/src/main/kotlin/kotlinx/rpc/codegen/registerRpcExtensions.kt b/...r-plugin/compiler-plugin-cli/src/main/kotlin/kotlinx/rpc/codegen/registerRpcExtensions.kt
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2023-2025 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.rpc.codegen
+
+import kotlinx.rpc.codegen.extension.RpcIrExtension
+import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
+import org.jetbrains.kotlin.compiler.plugin.CompilerPluginRegistrar
+import org.jetbrains.kotlin.compiler.plugin.ExperimentalCompilerApi
+import org.jetbrains.kotlin.config.CompilerConfiguration
+import org.jetbrains.kotlin.fir.extensions.FirExtensionRegistrarAdapter
+
+@OptIn(ExperimentalCompilerApi::class)
+fun CompilerPluginRegistrar.ExtensionStorage.registerRpcExtensions(configuration: CompilerConfiguration) {
+    VersionSpecificApi.INSTANCE = VersionSpecificApiImpl
+
+    IrGenerationExtension.registerExtension(RpcIrExtension(configuration))
+    FirExtensionRegistrarAdapter.registerExtension(FirRpcExtensionRegistrar(configuration))
+}
diff --git a/...gin/compiler-plugin-cli/src/main/templates/kotlinx/rpc/codegen/CompilerPluginRegistrar.kt b/...gin/compiler-plugin-cli/src/main/templates/kotlinx/rpc/codegen/CompilerPluginRegistrar.kt
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2023-2025 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.rpc.codegen
+
+import org.jetbrains.kotlin.compiler.plugin.CompilerPluginRegistrar
+import org.jetbrains.kotlin.compiler.plugin.ExperimentalCompilerApi
+import org.jetbrains.kotlin.config.CompilerConfiguration
+
+@OptIn(ExperimentalCompilerApi::class)
+class RpcCompilerPlugin : CompilerPluginRegistrar() {
+    override val supportsK2: Boolean = true
+
+//##csm RpcCompilerPlugin.pluginId
+//##csm specific=[2.0.0...2.2.99]
+//##csm /specific
+//##csm default
+    override val pluginId: String = PLUGIN_ID
+//##csm /default
+//##csm /RpcCompilerPlugin.pluginId
+
+    override fun ExtensionStorage.registerExtensions(configuration: CompilerConfiguration) {
+        registerRpcExtensions(configuration)
+    }
+}
diff --git a/...r-plugin/compiler-plugin-k2/src/main/kotlin/kotlinx/rpc/codegen/FirRpcServiceGenerator.kt b/...r-plugin/compiler-plugin-k2/src/main/kotlin/kotlinx/rpc/codegen/FirRpcServiceGenerator.kt
@@ -96,7 +96,7 @@ class FirRpcServiceGenerator(
      * Generates [owner]'s service stub.
      * Scrapes the functions from the [owner] to generate method classes.
      */
-    private fun generateRpcServiceStubClass(owner: FirClassSymbol<*>): FirRegularClassSymbol? {
+    private fun generateRpcServiceStubClass(owner: FirClassSymbol<*>): FirRegularClassSymbol {
         return createNestedClass(owner, RpcNames.SERVICE_STUB_NAME, RpcGeneratedStubKey(owner.name)) {
             visibility = Visibilities.Public
             modality = Modality.FINAL

diff --git a/compiler-plugin/gradle.properties b/compiler-plugin/gradle.properties
@@ -20,9 +20,6 @@ org.gradle.configuration-cache=true
 org.jetbrains.dokka.experimental.gradle.pluginMode=V2Enabled
 org.jetbrains.dokka.experimental.gradle.pluginMode.noWarn=true
 
-# https://youtrack.jetbrains.com/issue/KT-78504
-kotlin.js.yarn=false
-
 # development mode for kotlinx.rpc gradle plugin. Uses local project paths to apply the compiler plugin
 kotlinx.rpc.plugin.internalDevelopment=true
 

diff --git a/docs/environment.md b/docs/environment.md
@@ -392,7 +392,7 @@ Here is a 'simple' guide for solving problems:
 - Docker
     - `Cannot connect to the Docker daemon` - open `Docker Desktop`
 - Kotlin/Js or Kotlin/Wasm
-  - `kotlinUpgradePackageLock` or `kotlinWasmUpgradePackageLock` (and also `kotlinNpmInstall` or `kotlinWasmNpmInstall`)
+  - `kotlinUpgradeYarnLock` or `kotlinWasmUpgradeYarnLock` (and also `kotlinNpmInstall` or `kotlinWasmNpmInstall`)
   have a funny tendency to fail sometimes, and you don't know why. 
 
     I'll tell you! 
@@ -403,7 +403,7 @@ Here is a 'simple' guide for solving problems:
     If something doesn't work, your steps are:
     - Delete `package-lock.json` file
     - Delete `<REPO_ROOT>/build/js` / `<REPO_ROOT>/build/wasm`
-    - Run `kotlinUpgradePackageLock` / `kotlinWasmUpgradePackageLock`
+    - Run `kotlinUpgradeYarnLock` / `kotlinWasmUpgradeYarnLock`
     - If the problem persists:
       - Check that `<REPO_ROOT>/build/<target>/.npmrc` AND `<REPO_ROOT>/build/<target>/.yarnrc` are present
       - Check that `.yarnrc` contains one line: `registry: "https://packages.jetbrains.team/npm/p/krpc/build-deps/"`
@@ -479,7 +479,7 @@ all included builds (not subprojects) must reflect the change.
 - `checkLegacyAbi` / `updateLegacyAbi` - ABI checks. 
 See https://kotlinlang.org/docs/whatsnew22.html#binary-compatibility-validation-included-in-kotlin-gradle-plugin.
 Former BCV: https://github.com/Kotlin/binary-compatibility-validator
-- `kotlinUpgradePackageLock` / `kotlinWasmUpgradePackageLock` - update [kotlin-js-store](../kotlin-js-store) contents, 
+- `kotlinUpgradeYarnLock` / `kotlinWasmUpgradeYarnLock` - update [kotlin-js-store](../kotlin-js-store) contents, 
 usually after Kotlin version update.
 - `updateDocsChangelog` - put modified [CONTRIBUTING.md](../CONTRIBUTING.md) into [topics](pages/kotlinx-rpc/topics)
 - `detekt` - run detekt checks.

diff --git a/docs/pages/kotlinx-rpc/help-versions.json b/docs/pages/kotlinx-rpc/help-versions.json
@@ -1,3 +1,3 @@
 [
-  {"version":"0.9.1","url":"/kotlinx-rpc/0.9.1/","isCurrent":true}
+  {"version":"0.10.0","url":"/kotlinx-rpc/0.10.0/","isCurrent":true}
 ]
diff --git a/docs/pages/kotlinx-rpc/rpc.tree b/docs/pages/kotlinx-rpc/rpc.tree
@@ -42,6 +42,7 @@
     <toc-element topic="versions.topic"/>
     <toc-element topic="platforms.topic"/>
     <toc-element toc-title="Migration guides">
+        <toc-element topic="0-10-0.topic"/>
         <toc-element topic="0-8-0.topic"/>
         <toc-element topic="0-6-0.topic"/>
         <toc-element topic="0-5-0.topic"/>

diff --git a/docs/pages/kotlinx-rpc/topics/0-10-0.topic b/docs/pages/kotlinx-rpc/topics/0-10-0.topic
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  - Copyright 2023-2025 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+  -->
+
+<!DOCTYPE topic
+        SYSTEM "https://resources.jetbrains.com/writerside/1.0/xhtml-entities.dtd">
+<topic xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:noNamespaceSchemaLocation="https://resources.jetbrains.com/writerside/1.0/topic.v2.xsd"
+       title="Migration to 0.10.0" id="0-10-0">
+
+    <p>
+        Version <code>0.10.0</code> brings some changes that require a migration:
+    </p>
+    <list>
+        <li>
+            <code>waitForServices</code> parameter in kRPC config is deprecated
+            and should be replaced with <a href="configuration.topic#connector-dsl"/>
+        </li>
+        <li>
+            As a continuation of the previous point, the backpressure mechanism is now introduced.
+            You may encounter slowdowns by default when using streams.
+            Use <a href="configuration.topic#connector-dsl"/>
+            to configure better suited buffer sizes.
+        </li>
+        <li>
+            For Ktor kRPC integration -
+            <code>public fun Route.rpc</code> functions now accept a suspending function parameter
+            instead of a regular one.
+        </li>
+    </list>
+</topic>