Bump dependencies and add Writer skill

.agents/documentation-guidelines.md

@@ -9,6 +9,6 @@
 ## Avoid widows, runts, orphans, or rivers
 
 Agents should **AVOID** text flow patters illustrated
-on [this diagram](widow-runt-orphan-river.jpg).
+on [this diagram](widow-runt-orphan.jpg).
 
 [todo-comments]: https://github.com/SpineEventEngine/documentation/wiki/TODO-comments

.agents/skills/writer/SKILL.md

@@ -0,0 +1,46 @@
+---
+name: writer
+description: Write, edit, and restructure user-facing and developer-facing documentation. Use when asked to create/update docs such as `README.md`, `docs/**`, and other Markdown documentation; when drafting tutorials, guides, troubleshooting pages, or migration notes; and when improving inline API documentation (KDoc) and examples.
+---
+
+# Write documentation (repo-specific)
+
+## Decide the target and audience
+
+- Identify the target reader: end user, contributor, maintainer, or tooling/automation.
+- Identify the task type: new doc, update, restructure, or documentation audit.
+- Identify the acceptance criteria: “what is correct when the reader is done?”
+
+## Choose where the content should live
+
+- Prefer updating an existing doc over creating a new one.
+- Place content in the most discoverable location:
+  - `README.md`: project entry point and “what is this?”.
+  - `docs/`: longer-form docs (follow existing conventions in that tree).
+  - Source KDoc: API usage, examples, and semantics that belong with the code.
+
+## Follow local documentation conventions
+
+- Follow `.agents/documentation-guidelines.md` and `.agents/documentation-tasks.md`.
+- Use fenced code blocks for commands and examples; format file/dir names as code.
+- Avoid widows, runts, orphans, and rivers by reflowing paragraphs when needed.
+
+## Make docs actionable
+
+- Prefer steps the reader can execute (commands + expected outcome).
+- Prefer concrete examples over abstract descriptions.
+- Include prerequisites (versions, OS, environment) when they are easy to miss.
+- Use consistent terminology (match code identifiers and existing docs).
+
+## KDoc-specific guidance
+
+- For public/internal APIs, include at least one example snippet demonstrating common usage.
+- When converting from Javadoc/inline comments to KDoc:
+  - Remove HTML like `<p>` and preserve meaning.
+  - Prefer short paragraphs and blank lines over HTML formatting.
+
+## Validate changes
+
+- For code changes, follow `.agents/running-builds.md`.
+- For documentation-only changes in Kotlin/Java sources, prefer `./gradlew dokka`.
+

.agents/skills/writer/agents/openai.yaml

@@ -0,0 +1,5 @@
+interface:
+  display_name: "Writer"
+  short_description: "Write and update user/developer docs"
+  default_prompt: "Write or revise documentation in this repository (for example: README.md, docs/**, CONTRIBUTING.md, and API documentation/KDoc). Follow local documentation guidelines in .agents/*.md, keep changes concise and actionable, and include concrete examples and commands where appropriate."
+

.agents/skills/writer/assets/templates/doc-page.md

@@ -0,0 +1,23 @@
+# Title
+
+## Goal
+
+State what the reader will accomplish.
+
+## Prerequisites
+
+- List versions/tools the reader needs.
+
+## Steps
+
+1. Do the first thing.
+2. Do the next thing.
+
+## Verify
+
+Show how the reader can confirm success.
+
+## Troubleshooting
+
+- Common failure: likely cause → fix.
+

.agents/skills/writer/assets/templates/kdoc-example.md

@@ -0,0 +1,11 @@
+````kotlin
+/**
+ * Explain what this API does in one sentence.
+ *
+ * ## Example
+ * ```kotlin
+ * // Show the typical usage pattern.
+ * val result = doThing()
+ * ```
+ */
+````

.agents/skills/writer/assets/templates/kotlin-java-example.md

@@ -0,0 +1,13 @@
+{{< code-tabs langs="Kotlin, Java">}}
+
+{{< code-tab lang="Kotlin" >}}
+```kotlin
+```
+{{< /code-tab >}}
+
+{{< code-tab lang="Java" >}}
+```java
+```
+{{< /code-tab >}}
+
+{{< /code-tabs >}}

buildSrc/build.gradle.kts

@@ -75,15 +75,15 @@ val grGitVersion = "4.1.1"
  * This version may change from the [version of Kotlin][io.spine.dependency.lib.Kotlin.version]
  * used by the project.
  */
-val kotlinEmbeddedVersion = "2.2.21"
+val kotlinEmbeddedVersion = "2.3.10"
 
 /**
  * The version of Guava used in `buildSrc`.
  *
  * Always use the same version as the one specified in [io.spine.dependency.lib.Guava].
  * Otherwise, when testing Gradle plugins, clashes may occur.
  */
-val guavaVersion = "33.4.8-jre"
+val guavaVersion = "33.5.0-jre"
 
 /**
  * The version of ErrorProne Gradle plugin.
@@ -103,7 +103,7 @@ val errorPronePluginVersion = "4.2.0"
  * @see <a href="https://github.com/google/protobuf-gradle-plugin/releases">
  *     Protobuf Gradle Plugins Releases</a>
  */
-val protobufPluginVersion = "0.9.5"
+val protobufPluginVersion = "0.9.6"
 
 /**
  * The version of Dokka Gradle Plugins.

buildSrc/src/main/kotlin/io/spine/dependency/lib/Kotlin.kt

@@ -39,7 +39,7 @@ object Kotlin : DependencyWithBom() {
      * depend on Gradle and the version of embedded Kotlin.
      */
     @Suppress("MemberVisibilityCanBePrivate") // used directly from the outside.
-    const val runtimeVersion = "2.2.21"
+    const val runtimeVersion = "2.3.10"
 
     override val version = runtimeVersion
     override val group = "org.jetbrains.kotlin"

buildSrc/src/main/kotlin/io/spine/dependency/lib/Protobuf.kt

@@ -33,7 +33,7 @@ package io.spine.dependency.lib
 )
 object Protobuf {
     const val group = "com.google.protobuf"
-    const val version = "4.33.2"
+    const val version = "4.34.0"
 
     /**
      * The Java library with Protobuf data types.
@@ -64,7 +64,7 @@ object Protobuf {
          *
          * When changing the version, also change the version used in the `build.gradle.kts`.
          */
-        const val version = "0.9.5"
+        const val version = "0.9.6"
         const val id = "com.google.protobuf"
         const val lib = "$group:protobuf-gradle-plugin:$version"
     }

buildSrc/src/main/kotlin/io/spine/dependency/local/Base.kt

@@ -33,8 +33,8 @@ package io.spine.dependency.local
  */
 @Suppress("ConstPropertyName", "unused")
 object Base {
-    const val version = "2.0.0-SNAPSHOT.384"
-    const val versionForBuildScript = "2.0.0-SNAPSHOT.384"
+    const val version = "2.0.0-SNAPSHOT.385"
+    const val versionForBuildScript = "2.0.0-SNAPSHOT.385"
     const val group = Spine.group
     private const val prefix = "spine"
     const val libModule = "$prefix-base"

buildSrc/src/main/kotlin/io/spine/dependency/local/Change.kt

@@ -33,7 +33,7 @@ package io.spine.dependency.local
  */
 @Suppress("ConstPropertyName")
 object Change {
-    const val version = "2.0.0-SNAPSHOT.205"
+    const val version = "2.0.0-SNAPSHOT.206"
     const val group = Spine.group
     const val artifact = "spine-change"
     const val lib = "$group:$artifact:$version"

buildSrc/src/main/kotlin/io/spine/dependency/local/Compiler.kt

@@ -72,7 +72,7 @@ object Compiler : Dependency() {
      * The version of the Compiler dependencies.
      */
     override val version: String
-    private const val fallbackVersion = "2.0.0-SNAPSHOT.038"
+    private const val fallbackVersion = "2.0.0-SNAPSHOT.039"
 
     /**
      * The distinct version of the Compiler used by other build tools.
@@ -81,7 +81,7 @@ object Compiler : Dependency() {
      * transitive dependencies, this is the version used to build the project itself.
      */
     val dogfoodingVersion: String
-    private const val fallbackDfVersion = "2.0.0-SNAPSHOT.038"
+    private const val fallbackDfVersion = "2.0.0-SNAPSHOT.039"
 
     /**
      * The artifact for the Compiler Gradle plugin.

buildSrc/src/main/kotlin/io/spine/dependency/local/CoreJvmCompiler.kt

@@ -46,12 +46,12 @@ object CoreJvmCompiler {
     /**
      * The version used to in the build classpath.
      */
-    const val dogfoodingVersion = "2.0.0-SNAPSHOT.050"
+    const val dogfoodingVersion = "2.0.0-SNAPSHOT.054"
 
     /**
      * The version to be used for integration tests.
      */
-    const val version = "2.0.0-SNAPSHOT.050"
+    const val version = "2.0.0-SNAPSHOT.054"
 
     /**
      * The ID of the Gradle plugin.

buildSrc/src/main/kotlin/io/spine/dependency/local/ModelCompiler.kt

@@ -33,7 +33,7 @@ package io.spine.dependency.local
  */
 @Suppress("ConstPropertyName")
 object ModelCompiler {
-    const val version = "2.0.0-SNAPSHOT.133"
+    const val version = "2.0.0-SNAPSHOT.200"
     const val group = Spine.toolsGroup
     const val artifact = "spine-model-compiler"
     const val lib = "$group:$artifact:$version"

buildSrc/src/main/kotlin/io/spine/dependency/local/Time.kt

@@ -33,7 +33,7 @@ package io.spine.dependency.local
  */
 @Suppress("ConstPropertyName")
 object Time {
-    const val version = "2.0.0-SNAPSHOT.231"
+    const val version = "2.0.0-SNAPSHOT.232"
     const val group = Spine.group
     const val artifact = "spine-time"
     const val lib = "$group:$artifact:$version"

buildSrc/src/main/kotlin/io/spine/dependency/local/ToolBase.kt

@@ -34,8 +34,8 @@ package io.spine.dependency.local
 @Suppress("ConstPropertyName", "unused")
 object ToolBase {
     const val group = Spine.toolsGroup
-    const val version = "2.0.0-SNAPSHOT.371"
-    const val dogfoodingVersion = "2.0.0-SNAPSHOT.371"
+    const val version = "2.0.0-SNAPSHOT.373"
+    const val dogfoodingVersion = "2.0.0-SNAPSHOT.373"
 
     const val lib = "$group:tool-base:$version"
     const val classicCodegen = "$group:classic-codegen:$version"

buildSrc/src/main/kotlin/io/spine/dependency/local/Validation.kt

@@ -36,7 +36,7 @@ object Validation {
     /**
      * The version of the Validation library artifacts.
      */
-    const val version = "2.0.0-SNAPSHOT.393"
+    const val version = "2.0.0-SNAPSHOT.402"
 
     /**
      * The last version of Validation compatible with ProtoData.

buildSrc/src/main/kotlin/io/spine/gradle/kotlin/KotlinConfig.kt

@@ -28,7 +28,9 @@ package io.spine.gradle.kotlin
 
 import org.gradle.jvm.toolchain.JavaLanguageVersion
 import org.jetbrains.kotlin.gradle.dsl.KotlinCommonCompilerOptions
+import org.jetbrains.kotlin.gradle.dsl.KotlinJvmCompilerOptions
 import org.jetbrains.kotlin.gradle.dsl.KotlinJvmProjectExtension
+import org.jetbrains.kotlin.gradle.dsl.JvmDefaultMode
 
 /**
  * Sets [Java toolchain](https://kotlinlang.org/docs/gradle.html#gradle-java-toolchains-support)
@@ -53,10 +55,12 @@ fun KotlinJvmProjectExtension.applyJvmToolchain(version: String) =
  */
 @Suppress("unused")
 fun KotlinCommonCompilerOptions.setFreeCompilerArgs() {
+    if (this is KotlinJvmCompilerOptions) {
+        jvmDefault.set(JvmDefaultMode.ENABLE)
+    }
     freeCompilerArgs.addAll(
         listOf(
             "-Xskip-prerelease-check",
-            "-Xjvm-default=all",
             "-Xinline-classes",
             "-Xexpect-actual-classes",
             "-Xcontext-parameters",

buildSrc/src/main/kotlin/io/spine/gradle/testing/Logging.kt

@@ -28,9 +28,9 @@ package io.spine.gradle.testing
 
 import org.gradle.api.tasks.testing.Test
 import org.gradle.api.tasks.testing.TestDescriptor
+import org.gradle.api.tasks.testing.TestListener
 import org.gradle.api.tasks.testing.TestResult
 import org.gradle.api.tasks.testing.logging.TestExceptionFormat
-import org.gradle.kotlin.dsl.KotlinClosure2
 
 /**
  * Configures logging of this [Test] task.
@@ -70,19 +70,16 @@ fun Test.configureLogging() {
         >> $skippedTestCount skipped
         """
 
-    afterSuite(
-
-        // `GroovyInteroperability` is employed as `afterSuite()` has no equivalent in Kotlin DSL.
-        // See issue: https://github.com/gradle/gradle/issues/5431
-
-        KotlinClosure2<TestDescriptor, TestResult, Unit>({ descriptor, result ->
+    val listener = object : TestListener {
 
+        override fun afterSuite(descriptor: TestDescriptor, result: TestResult) {
             // If the descriptor has no parent, then it is the root test suite,
             // i.e. it includes the info about all the run tests.
-
             if (descriptor.parent == null) {
                 logger.lifecycle(result.summary())
             }
-        })
-    )
+        }
+    }
+
+    addTestListener(listener)
 }