diff --git a/buildSrc/src/main/kotlin/io/spine/internal/dependency/ProtoData.kt b/buildSrc/src/main/kotlin/io/spine/internal/dependency/ProtoData.kt
index ce95ecf6..25367c0c 100644
--- a/buildSrc/src/main/kotlin/io/spine/internal/dependency/ProtoData.kt
+++ b/buildSrc/src/main/kotlin/io/spine/internal/dependency/ProtoData.kt
@@ -29,17 +29,107 @@ package io.spine.internal.dependency
 /**
  * Dependencies on ProtoData modules.
  *
+ * In order to use locally published ProtoData version instead of the version from a public plugin
+ * registry, set the `PROTODATA_VERSION` and/or the `PROTODATA_DF_VERSION` environment variables
+ * and stop the Gradle daemons so that Gradle observes the env change:
+ * ```
+ * export PROTODATA_VERSION=0.43.0-local
+ * export PROTODATA_DF_VERSION=0.41.0
+ *
+ * ./gradle --stop
+ * ./gradle build   # Conduct the intended checks.
+ * ```
+ *
+ * Then, in order to reset the console to run the usual versions again, remove the values of
+ * the environment variables and stop the daemon:
+ * ```
+ * export PROTODATA_VERSION=""
+ * export PROTODATA_DF_VERSION=""
+ *
+ * ./gradle --stop
+ * ```
+ *
  * See [`SpineEventEngine/ProtoData`](https://github.com/SpineEventEngine/ProtoData/).
  */
-@Suppress("unused", "ConstPropertyName")
+@Suppress(
+    "unused" /* Some subprojects do not use ProtoData directly. */,
+    "ConstPropertyName" /* We use custom convention for artifact properties. */,
+    "MemberVisibilityCanBePrivate" /* The properties are used directly by other subprojects. */,
+    "KDocUnresolvedReference" /* Referencing private properties in constructor KDoc. */
+)
 object ProtoData {
-    const val version = "0.11.4"
-    const val dogfoodingVersion = "0.11.0"
     const val group = "io.spine.protodata"
-    const val compiler = "$group:protodata-compiler:$version"
+    const val pluginId = "io.spine.protodata"
 
-    const val codegenJava = "io.spine.protodata:protodata-codegen-java:$version"
+    /**
+     * The version of ProtoData dependencies.
+     */
+    val version: String
+    private const val fallbackVersion = "0.12.0"
 
-    const val pluginId = "io.spine.protodata"
-    const val pluginLib = "${Spine.group}:protodata:$version"
+    /**
+     * The distinct version of ProtoData used by other build tools.
+     *
+     * When ProtoData is used both for building the project and as a part of the Project's
+     * transitional dependencies, this is the version used to build the project itself.
+     */
+    val dogfoodingVersion: String
+    private const val fallbackDfVersion = "0.9.11"
+
+    /**
+     * The artifact for the ProtoData Gradle plugin.
+     */
+    val pluginLib: String
+
+    val api
+        get() = "$group:protodata-api:$version"
+    val compiler
+        get() = "$group:protodata-compiler:$version"
+    val codegenJava
+        get() = "$group:protodata-codegen-java:$version"
+
+    /**
+     * An env variable storing a custom [version].
+     */
+    private const val VERSION_ENV = "PROTODATA_VERSION"
+
+    /**
+     * An env variable storing a custom [dogfoodingVersion].
+     */
+    private const val DF_VERSION_ENV = "PROTODATA_DF_VERSION"
+
+    /**
+     * Sets up the versions and artifacts for the build to use.
+     *
+     * If either [VERSION_ENV] or [DF_VERSION_ENV] is set, those versions are used instead of
+     * the hardcoded ones. Also, in this mode, the [pluginLib] coordinates are changed so that
+     * it points at a locally published artifact. Otherwise, it points at an artifact that would be
+     * published to a public plugin registry.
+     */
+    init {
+        val experimentVersion = System.getenv(VERSION_ENV)
+        val experimentDfVersion = System.getenv(DF_VERSION_ENV)
+        if (experimentVersion?.isNotBlank() == true || experimentDfVersion?.isNotBlank() == true) {
+            version = experimentVersion ?: fallbackVersion
+            dogfoodingVersion = experimentDfVersion ?: fallbackDfVersion
+
+            pluginLib = "${group}:gradle-plugin:$version"
+            println("""
+
+                ❗ Running an experiment with ProtoData. ❗
+                -----------------------------------------
+                    Regular version     = v$version
+                    Dogfooding version  = v$dogfoodingVersion
+                
+                    ProtoData Gradle plugin can now be loaded from Maven Local.
+                    
+                    To reset the versions, erase the `$$VERSION_ENV` and `$$DF_VERSION_ENV` environment variables. 
+
+            """.trimIndent())
+        } else {
+            version = fallbackVersion
+            dogfoodingVersion = fallbackDfVersion
+            pluginLib = "${Spine.group}:protodata:$version"
+        }
+    }
 }
diff --git a/buildSrc/src/main/kotlin/io/spine/internal/dependency/Roaster.kt b/buildSrc/src/main/kotlin/io/spine/internal/dependency/Roaster.kt
index c18d9b92..af524da3 100644
--- a/buildSrc/src/main/kotlin/io/spine/internal/dependency/Roaster.kt
+++ b/buildSrc/src/main/kotlin/io/spine/internal/dependency/Roaster.kt
@@ -30,6 +30,13 @@ package io.spine.internal.dependency
 @Suppress("unused", "ConstPropertyName")
 object Roaster {
 
+    /**
+     * This is the last version build with Java 11.
+     *
+     * Starting from version
+     * [2.29.0.Final](https://github.com/forge/roaster/releases/tag/2.29.0.Final),
+     * Roaster requires Java 17.
+     */
     private const val version = "2.28.0.Final"
 
     const val api = "org.jboss.forge.roaster:roaster-api:${version}"
diff --git a/buildSrc/src/main/kotlin/io/spine/internal/dependency/Spine.kt b/buildSrc/src/main/kotlin/io/spine/internal/dependency/Spine.kt
index b5332cdd..e935bf41 100644
--- a/buildSrc/src/main/kotlin/io/spine/internal/dependency/Spine.kt
+++ b/buildSrc/src/main/kotlin/io/spine/internal/dependency/Spine.kt
@@ -59,7 +59,7 @@ object Spine {
          *
          * @see <a href="https://github.com/SpineEventEngine/logging">spine-logging</a>
          */
-        const val logging = "2.0.0-SNAPSHOT.210"
+        const val logging = "2.0.0-SNAPSHOT.226"
 
         /**
          * The version of [Spine.testlib].
@@ -75,7 +75,7 @@ object Spine {
          * @see [Spine.CoreJava.server]
          * @see <a href="https://github.com/SpineEventEngine/core-java">core-java</a>
          */
-        const val core = "2.0.0-SNAPSHOT.157"
+        const val core = "2.0.0-SNAPSHOT.159"
 
         /**
          * The version of [Spine.modelCompiler].
@@ -89,7 +89,7 @@ object Spine {
          *
          * @see <a href="https://github.com/SpineEventEngine/mc-java">spine-mc-java</a>
          */
-        const val mcJava = "2.0.0-SNAPSHOT.169"
+        const val mcJava = "2.0.0-SNAPSHOT.170"
 
         /**
          * The version of [Spine.baseTypes].
@@ -103,7 +103,7 @@ object Spine {
          *
          * @see <a href="https://github.com/SpineEventEngine/time">spine-time</a>
          */
-        const val time = "2.0.0-SNAPSHOT.133"
+        const val time = "2.0.0-SNAPSHOT.134"
 
         /**
          * The version of [Spine.change].
@@ -124,7 +124,7 @@ object Spine {
          *
          * @see <a href="https://github.com/SpineEventEngine/tool-base">spine-tool-base</a>
          */
-        const val toolBase = "2.0.0-SNAPSHOT.183"
+        const val toolBase = "2.0.0-SNAPSHOT.186"
 
         /**
          * The version of [Spine.javadocTools].
@@ -165,8 +165,20 @@ object Spine {
         const val version = ArtifactVersion.logging
         const val lib = "$group:spine-logging:$version"
         const val backend = "$group:spine-logging-backend:$version"
+        const val log4j2Backend = "$group:spine-logging-log4j2-backend:$version"
         const val context = "$group:spine-logging-context:$version"
+        const val grpcContext = "$group:spine-logging-grpc-context:$version"
+
+        @Deprecated(
+            message = "Please use `Logging.lib` instead.",
+            replaceWith = ReplaceWith("lib")
+        )
         const val floggerApi = "$group:spine-flogger-api:$version"
+
+        @Deprecated(
+            message = "Please use `grpcContext` instead.",
+            replaceWith = ReplaceWith("grpcContext")
+        )
         const val floggerGrpcContext = "$group:spine-flogger-grpc-context:$version"
         const val smokeTest = "$group:spine-logging-smoke-test:$version"
     }
diff --git a/buildSrc/src/main/kotlin/io/spine/internal/dependency/Validation.kt b/buildSrc/src/main/kotlin/io/spine/internal/dependency/Validation.kt
index 3da83fe7..a4a45be3 100644
--- a/buildSrc/src/main/kotlin/io/spine/internal/dependency/Validation.kt
+++ b/buildSrc/src/main/kotlin/io/spine/internal/dependency/Validation.kt
@@ -33,7 +33,7 @@ package io.spine.internal.dependency
  */
 @Suppress("unused", "ConstPropertyName")
 object Validation {
-    const val version = "2.0.0-SNAPSHOT.103"
+    const val version = "2.0.0-SNAPSHOT.104"
     const val group = "io.spine.validation"
     const val runtime = "$group:spine-validation-java-runtime:$version"
     const val java = "$group:spine-validation-java:$version"
diff --git a/config b/config
index d4f23221..f43d55f8 160000
--- a/config
+++ b/config
@@ -1 +1 @@
-Subproject commit d4f232214236e9bca746ab2984ce6e46c5d79600
+Subproject commit f43d55f8f031e5a3ccede3c7bc0c17b59599774d
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 943f0cbf..afba1092 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 4e86b927..b1624c47 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.3-bin.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists