diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index 7005ede2..8b5916f7 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -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 = "0.9.4"
 
 /**
  * The version of Dokka Gradle Plugins.
diff --git a/buildSrc/src/main/kotlin/DependencyResolution.kt b/buildSrc/src/main/kotlin/DependencyResolution.kt
index b7b30a9e..124adb3f 100644
--- a/buildSrc/src/main/kotlin/DependencyResolution.kt
+++ b/buildSrc/src/main/kotlin/DependencyResolution.kt
@@ -85,6 +85,9 @@ fun NamedDomainObjectContainer<Configuration>.forceVersions() {
 
 private fun ResolutionStrategy.forceProductionDependencies() {
     @Suppress("DEPRECATION") // Force versions of SLF4J and Kotlin libs.
+    Protobuf.libs.forEach {
+        force(it)
+    }
     force(
         AnimalSniffer.lib,
         AutoCommon.lib,
diff --git a/buildSrc/src/main/kotlin/io/spine/dependency/boms/Boms.kt b/buildSrc/src/main/kotlin/io/spine/dependency/boms/Boms.kt
new file mode 100644
index 00000000..1f866e55
--- /dev/null
+++ b/buildSrc/src/main/kotlin/io/spine/dependency/boms/Boms.kt
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2025, TeamDev. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Redistribution and use in source and/or binary forms, with or without
+ * modification, must retain the above copyright notice and the following
+ * disclaimer.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package io.spine.dependency.boms
+
+import io.spine.dependency.kotlinx.Coroutines
+import io.spine.dependency.lib.Jackson
+import io.spine.dependency.lib.Kotlin
+import io.spine.dependency.test.JUnit
+
+/**
+ * The collection of references to BOMs applied by [BomsPlugin].
+ */
+object Boms {
+
+    /**
+     * The base production BOMs.
+     */
+    val core = listOf(
+        Kotlin.bom,
+        Coroutines.bom
+    )
+
+    /**
+     * The BOMs for testing dependencies.
+     */
+    val testing = listOf(
+        JUnit.bom
+    )
+
+    /**
+     * Technology-based BOMs.
+     */
+    object Optional {
+        val jackson = listOf(
+            Jackson.bom
+        )
+    }
+}
diff --git a/buildSrc/src/main/kotlin/io/spine/dependency/boms/BomsPlugin.kt b/buildSrc/src/main/kotlin/io/spine/dependency/boms/BomsPlugin.kt
new file mode 100644
index 00000000..fc576f49
--- /dev/null
+++ b/buildSrc/src/main/kotlin/io/spine/dependency/boms/BomsPlugin.kt
@@ -0,0 +1,148 @@
+/*
+ * Copyright 2025, TeamDev. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Redistribution and use in source and/or binary forms, with or without
+ * modification, must retain the above copyright notice and the following
+ * disclaimer.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package io.spine.dependency.boms
+
+import io.spine.dependency.lib.Kotlin
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.artifacts.Configuration
+
+/**
+ * The plugin which forces versions of platforms declared in the [Boms] object.
+ *
+ * Versions are enforced via the
+ * [org.gradle.api.artifacts.dsl.DependencyHandler.enforcedPlatform] call
+ * for configurations of the project to which the plugin is applied.
+ *
+ * The configurations are selected by the "kind" of BOM.
+ *
+ * [Boms.core] are applied to:
+ *  1. Production configurations, such as `api` or `implementation`.
+ *  2. Compilation configurations.
+ *  3. All `ksp` configurations.
+ *
+ *  [Boms.testing] are applied to all testing configurations.
+ *
+ *  In addition to forcing BOM-based dependencies,
+ *  the plugin [forces][org.gradle.api.artifacts.ResolutionStrategy.force] the versions
+ *  of [Kotlin.StdLib.artefacts] for all configurations because even through Kotlin
+ *  artefacts are forced with BOM, the `variants` in the dependencies cannot be
+ *  picked by Gradle.
+ *
+ *  Run Gradle with the [INFO][org.gradle.api.logging.Logger.isInfoEnabled] logging level
+ *  to see the dependencies forced by this plugin.
+ */
+class BomsPlugin : Plugin<Project>  {
+
+    private val productionConfigs = listOf(
+        "api",
+        "implementation",
+        "compileOnly",
+        "runtimeOnly"
+    )
+
+    override fun apply(project: Project) = with(project) {
+
+        fun log(message: () -> String) {
+            val logger = project.logger
+            if (logger.isInfoEnabled) {
+                logger.info(message.invoke())
+            }
+        }
+
+        fun Configuration.applyBoms(boms: List<String>) {
+            boms.forEach { bom ->
+                withDependencies {
+                    val platform = project.dependencies.enforcedPlatform(bom)
+                    addLater(provider { platform })
+                    log { "Applied BOM: `$bom` to the configuration: `${this@applyBoms.name}`." }
+                }
+            }
+        }
+
+        configurations.run {
+            matching { isCompilationConfig(it.name) }.all {
+                applyBoms(Boms.core)
+            }
+            matching { isKspConfig(it.name) }.all {
+                applyBoms(Boms.core)
+            }
+            matching { it.name in productionConfigs }.all {
+                applyBoms(Boms.core)
+            }
+            matching { isTestConfig(it.name) }.all {
+                applyBoms(Boms.core + Boms.testing)
+            }
+
+            fun Configuration.diagSuffix(): String =
+                "the configuration `$name` in the project: `${project.path}`."
+
+            matching { !supportsBom(it.name) }.all {
+                resolutionStrategy.eachDependency {
+                    if (requested.group == Kotlin.group) {
+                        val kotlinVersion = Kotlin.runtimeVersion
+                        useVersion(kotlinVersion)
+                        log { "Forced Kotlin version `$kotlinVersion` in " + this@all.diagSuffix() }
+                    }
+                }
+            }
+
+            all {
+                resolutionStrategy {
+                    // The versions for Kotlin are resoled above correctly.
+                    // But that does not guarantees that Gradle picks up a correct `variant`.
+                    Kotlin.StdLib.artefacts.forEach { artefact ->
+                        force(artefact)
+                        log { "Forced the version of `$artefact` in " + this@all.diagSuffix() }
+                    }
+                }
+            }
+        }
+    }
+
+    private fun isCompilationConfig(name: String) =
+        name.contains("compile", ignoreCase = true) &&
+                // `comileProtoPath` or `compileTestProtoPath`.
+                !name.contains("ProtoPath", ignoreCase = true)
+
+    private fun isKspConfig(name: String) =
+        name.startsWith("ksp", ignoreCase = true)
+
+    private fun isTestConfig(name: String) =
+        name.startsWith("test", ignoreCase = true)
+
+    /**
+     * Tells if the configuration with the given [name] supports forcing
+     * versions via the BOM mechanism.
+     *
+     * Not all configurations supports forcing via BOM. E.g., the configurations created
+     * by Protobuf Gradle Plugin such as `compileProtoPath` or `extractIncludeProto` do
+     * not pick up versions of dependencies set via `enforcedPlatform(myBom)`.
+     */
+    private fun supportsBom(name: String) =
+        (isCompilationConfig(name) || isKspConfig(name) || isTestConfig(name))
+}
diff --git a/buildSrc/src/main/kotlin/io/spine/dependency/lib/Kotlin.kt b/buildSrc/src/main/kotlin/io/spine/dependency/lib/Kotlin.kt
index e0eedd67..45b1c4b8 100644
--- a/buildSrc/src/main/kotlin/io/spine/dependency/lib/Kotlin.kt
+++ b/buildSrc/src/main/kotlin/io/spine/dependency/lib/Kotlin.kt
@@ -57,16 +57,30 @@ object Kotlin {
     const val bom = "$group:kotlin-bom:$runtimeVersion"
 
     const val scriptRuntime = "$group:kotlin-script-runtime"
-    const val stdLib       = "$group:kotlin-stdlib"
-    const val stdLibCommon = "$group:kotlin-stdlib-common"
 
-    const val toolingCore = "$group:kotlin-tooling-core"
+    object StdLib {
+        private const val infix = "kotlin-stdlib"
+        const val itself = "$group:$infix"
+        const val common = "$group:$infix-common"
+        const val jdk7 = "$group:$infix-jdk7"
+        const val jdk8 = "$group:$infix-jdk8"
+
+        val artefacts = setOf(itself, common, jdk7, jdk8).map { "$it:$runtimeVersion" }
+    }
+
+    @Deprecated("Please use `StdLib.itself` instead.", ReplaceWith("StdLib.itself"))
+    const val stdLib       = StdLib.itself
 
-    @Deprecated("Please use `stdLib` instead.")
-    const val stdLibJdk7   = "$group:kotlin-stdlib-jdk7"
+    @Deprecated("Please use `StdLib.common` instead.", ReplaceWith("StdLib.common"))
+    const val stdLibCommon = StdLib.common
 
-    @Deprecated("Please use `stdLib` instead.")
-    const val stdLibJdk8   = "$group:kotlin-stdlib-jdk8"
+    @Deprecated("Please use `StdLib.jdk7` instead.", ReplaceWith("StdLib.jdk7"))
+    const val stdLibJdk7   = StdLib.jdk7
+
+    @Deprecated("Please use `StdLib.jdk8` instead.")
+    const val stdLibJdk8   = StdLib.jdk8
+
+    const val toolingCore = "$group:kotlin-tooling-core"
 
     const val reflect    = "$group:kotlin-reflect"
     const val testJUnit5 = "$group:kotlin-test-junit5"
diff --git a/buildSrc/src/main/kotlin/io/spine/dependency/lib/Protobuf.kt b/buildSrc/src/main/kotlin/io/spine/dependency/lib/Protobuf.kt
index f6572076..342d6db8 100644
--- a/buildSrc/src/main/kotlin/io/spine/dependency/lib/Protobuf.kt
+++ b/buildSrc/src/main/kotlin/io/spine/dependency/lib/Protobuf.kt
@@ -60,7 +60,7 @@ object Protobuf {
     object GradlePlugin {
         /**
          * The version of this plugin is already specified in `buildSrc/build.gradle.kts` file.
-         * Thus, when applying the plugin to projects build files, only the [id] should be used.
+         * Thus, when applying the plugin to project build files, only the [id] should be used.
          *
          * When changing the version, also change the version used in the `build.gradle.kts`.
          */
diff --git a/buildSrc/src/main/kotlin/io/spine/dependency/test/JUnit.kt b/buildSrc/src/main/kotlin/io/spine/dependency/test/JUnit.kt
index fd253e90..dbcf02b4 100644
--- a/buildSrc/src/main/kotlin/io/spine/dependency/test/JUnit.kt
+++ b/buildSrc/src/main/kotlin/io/spine/dependency/test/JUnit.kt
@@ -41,6 +41,9 @@ object JUnit {
      *     testImplementation(enforcedPlatform(JUnit.bom))
      * }
      * ```
+     * The version of JUnit is forced automatically by
+     * the [BomsPlugin][io.spine.dependency.boms.BomsPlugin]
+     * when it is applied to the project.
      */
     const val bom = "org.junit:junit-bom:$version"
 
diff --git a/buildSrc/src/main/kotlin/jvm-module.gradle.kts b/buildSrc/src/main/kotlin/jvm-module.gradle.kts
index 2fda6f03..b1587a77 100644
--- a/buildSrc/src/main/kotlin/jvm-module.gradle.kts
+++ b/buildSrc/src/main/kotlin/jvm-module.gradle.kts
@@ -28,12 +28,10 @@ import BuildSettings.javaVersion
 import io.spine.dependency.build.CheckerFramework
 import io.spine.dependency.build.Dokka
 import io.spine.dependency.build.ErrorProne
+import io.spine.dependency.build.JSpecify
 import io.spine.dependency.lib.Guava
-import io.spine.dependency.lib.JavaX
 import io.spine.dependency.lib.Protobuf
-import io.spine.dependency.local.Logging
 import io.spine.dependency.local.Reflect
-import io.spine.dependency.local.TestLib
 import io.spine.dependency.test.Jacoco
 import io.spine.gradle.checkstyle.CheckStyleConfig
 import io.spine.gradle.github.pages.updateGitHubPages
@@ -43,8 +41,6 @@ import io.spine.gradle.javadoc.JavadocConfig
 import io.spine.gradle.kotlin.applyJvmToolchain
 import io.spine.gradle.kotlin.setFreeCompilerArgs
 import io.spine.gradle.report.license.LicenseReporter
-import io.spine.gradle.testing.configureLogging
-import io.spine.gradle.testing.registerTestTasks
 
 plugins {
     `java-library`
@@ -71,7 +67,6 @@ project.run {
 
     val generatedDir = "$projectDir/generated"
     setTaskDependencies(generatedDir)
-    setupTests()
 
     configureGitHubPages()
 }
@@ -134,12 +129,8 @@ fun Module.addDependencies() = dependencies {
     api(Guava.lib)
 
     compileOnlyApi(CheckerFramework.annotations)
-    compileOnlyApi(JavaX.annotations)
+    api(JSpecify.annotations)
     ErrorProne.annotations.forEach { compileOnlyApi(it) }
-
-    implementation(Logging.lib)
-
-    testImplementation(TestLib.lib)
 }
 
 fun Module.forceConfigurations() {
@@ -157,18 +148,6 @@ fun Module.forceConfigurations() {
     }
 }
 
-fun Module.setupTests() {
-    tasks {
-        registerTestTasks()
-        test.configure {
-            useJUnitPlatform {
-                includeEngines("junit-jupiter")
-            }
-            configureLogging()
-        }
-    }
-}
-
 fun Module.setTaskDependencies(generatedDir: String) {
     tasks {
         val cleanGenerated by registering(Delete::class) {
diff --git a/buildSrc/src/main/kotlin/module-testing.gradle.kts b/buildSrc/src/main/kotlin/module-testing.gradle.kts
index 23452c93..715852c7 100644
--- a/buildSrc/src/main/kotlin/module-testing.gradle.kts
+++ b/buildSrc/src/main/kotlin/module-testing.gradle.kts
@@ -33,6 +33,18 @@ import io.spine.dependency.test.Truth
 import io.spine.gradle.testing.configureLogging
 import io.spine.gradle.testing.registerTestTasks
 
+/**
+ * This convention plugin applies test dependencies and configures test-related tasks.
+ *
+ * The version of the [JUnit] platform must be applied via the [BomsPlugin][io.spine.dependency.boms.BomsPlugin]:
+ *
+ * ```kotlin
+ * apply<BomsPlugin>()
+ * ```
+ */
+@Suppress("unused")
+private val about = ""
+
 plugins {
     `java-library`
 }
@@ -46,6 +58,7 @@ dependencies {
     forceJunitPlatform()
 
     testImplementation(Jupiter.api)
+    testImplementation(Jupiter.params)
     testImplementation(JUnit.pioneer)
 
     testImplementation(Guava.testLib)