diff --git a/.github/workflows/hone.yml b/.github/workflows/hone.yml
new file mode 100644
index 0000000000..6342344810
--- /dev/null
+++ b/.github/workflows/hone.yml
@@ -0,0 +1,50 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2016-2024 Objectionary.com
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+---
+name: hone
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+concurrency:
+  group: hone-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  hone:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 21
+      - uses: actions/cache@v4
+        with:
+          path: ~/.m2/repository
+          key: maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            maven-
+      - run: mvn install -DskipTests -Dinvoker.skip -Phone
+      - run: mvn test -Phone -pl :eo-runtime
diff --git a/eo-maven-plugin/src/main/java/org/eolang/maven/PhiMojo.java b/eo-maven-plugin/src/main/java/org/eolang/maven/PhiMojo.java
index b0bdfa0460..c58bf7bb5c 100644
--- a/eo-maven-plugin/src/main/java/org/eolang/maven/PhiMojo.java
+++ b/eo-maven-plugin/src/main/java/org/eolang/maven/PhiMojo.java
@@ -256,7 +256,7 @@ private static String translated(final Xsline xsline, final XML xmir)
         final List<String> phi = translated.xpath("program/phi/text()");
         if (phi.isEmpty()) {
             throw new ImpossibleToPhiTranslationException(
-                "Xpath 'phi/text()' is not found in translated XMIR"
+                "Xpath 'phi/text()' is not found in the translated XMIR"
             );
         }
         return phi.get(0);
diff --git a/eo-runtime/pom.xml b/eo-runtime/pom.xml
index 6ea0c6b582..fe02d2b85c 100644
--- a/eo-runtime/pom.xml
+++ b/eo-runtime/pom.xml
@@ -380,5 +380,32 @@ SOFTWARE.
         </plugins>
       </build>
     </profile>
+    <profile>
+      <id>hone</id>
+      <properties>
+        <hone.version>0.0.22</hone.version>
+      </properties>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.eolang</groupId>
+            <artifactId>hone-maven-plugin</artifactId>
+            <version>${hone.version}</version>
+            <executions>
+              <execution>
+                <goals>
+                  <goal>pull</goal>
+                  <goal>optimize</goal>
+                  <goal>rmi</goal>
+                </goals>
+                <configuration>
+                  <image>yegor256/hone:${hone.version}</image>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
   </profiles>
 </project>
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOerror.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOerror.java
index fabc4a3963..2be4ee6952 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOerror.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOerror.java
@@ -106,7 +106,8 @@ private static String message(final Throwable exp) {
                 ret.append(exp.getMessage().replace("%", "%%"));
             }
             if (exp.getCause() != null) {
-                ret.append("; caused by ").append(ErrorMsg.message(exp.getCause()));
+                ret.append("; caused by ")
+                    .append(ErrorMsg.message(exp.getCause()));
             }
             return ret.toString();
         }