diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
deleted file mode 100644
index ba9428f..0000000
--- a/.github/workflows/ci.yml
+++ /dev/null
@@ -1,90 +0,0 @@
-name: CI
-
-on:
-  push:
-    branches: [ master, main ]
-  pull_request:
-    branches: [ master, main ]
-  workflow_dispatch:
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    timeout-minutes: 15
-
-    steps:
-    - uses: actions/checkout@v4
-
-    - name: Set up JDK 17
-      uses: actions/setup-java@v4
-      with:
-        java-version: '17'
-        distribution: 'temurin'
-
-    - name: Build and test with coverage
-      run: |
-        BUILD_OK=true
-        TEST_OK=true
-        COVERAGE_OK=true
-
-        # Build
-        if ! mvn -B clean compile -Dmaven.test.skip=true -Djava.awt.headless=true 2>&1; then
-          BUILD_OK=false
-          echo "::warning::Build failed — legacy code may need updates for Java 17"
-        fi
-
-        # Test + JaCoCo
-        if $BUILD_OK; then
-          if ! mvn -B test -Djava.awt.headless=true 2>&1; then
-            TEST_OK=false
-            echo "::warning::Some tests failed"
-          fi
-        fi
-
-        # Coverage check
-        if $BUILD_OK && $TEST_OK; then
-          if ! mvn -B verify -Dmaven.test.skip=true -Djava.awt.headless=true 2>&1; then
-            COVERAGE_OK=false
-            echo "::warning::Coverage below 100%"
-          fi
-        fi
-
-        echo "BUILD_OK=$BUILD_OK" >> $GITHUB_ENV
-        echo "TEST_OK=$TEST_OK" >> $GITHUB_ENV
-        echo "COVERAGE_OK=$COVERAGE_OK" >> $GITHUB_ENV
-
-    - name: Coverage summary
-      if: always()
-      run: |
-        echo "## CI Status" >> $GITHUB_STEP_SUMMARY
-        echo "| Step | Status |" >> $GITHUB_STEP_SUMMARY
-        echo "|------|--------|" >> $GITHUB_STEP_SUMMARY
-        [ "$BUILD_OK" = "true" ] && echo "| Build | ✅ |" >> $GITHUB_STEP_SUMMARY || echo "| Build | ❌ |" >> $GITHUB_STEP_SUMMARY
-        [ "$TEST_OK" = "true" ] && echo "| Tests | ✅ |" >> $GITHUB_STEP_SUMMARY || echo "| Tests | ❌ |" >> $GITHUB_STEP_SUMMARY
-        [ "$COVERAGE_OK" = "true" ] && echo "| Coverage 100% | ✅ |" >> $GITHUB_STEP_SUMMARY || echo "| Coverage 100% | ❌ |" >> $GITHUB_STEP_SUMMARY
-
-        if [ -f target/site/jacoco/jacoco.csv ]; then
-          echo "" >> $GITHUB_STEP_SUMMARY
-          echo "## Coverage Report" >> $GITHUB_STEP_SUMMARY
-          echo '```' >> $GITHUB_STEP_SUMMARY
-          awk -F',' 'NR>1 {missed+=$4; covered+=$5} END {total=missed+covered; if(total>0) printf "Line Coverage: %d/%d (%.1f%%)\nMissed: %d lines\n", covered, total, covered*100/total, missed; else print "No coverage data"}' target/site/jacoco/jacoco.csv >> $GITHUB_STEP_SUMMARY
-          echo '```' >> $GITHUB_STEP_SUMMARY
-          echo "" >> $GITHUB_STEP_SUMMARY
-          echo "### Per-class" >> $GITHUB_STEP_SUMMARY
-          echo '| Class | Coverage | Lines |' >> $GITHUB_STEP_SUMMARY
-          echo '|-------|----------|-------|' >> $GITHUB_STEP_SUMMARY
-          awk -F',' 'NR>1 {total=$4+$5; if(total>0) pct=$5*100/total; else pct=100; printf "| %s.%s | %.0f%% | %d/%d |\n", $2, $3, pct, $5, total}' target/site/jacoco/jacoco.csv >> $GITHUB_STEP_SUMMARY
-        fi
-
-    - name: Upload coverage
-      if: always()
-      uses: codecov/codecov-action@v4
-      with:
-        file: target/site/jacoco/jacoco.xml
-        fail_ci_if_error: false
-      env:
-        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/CLAUDE.md b/CLAUDE.md
deleted file mode 100644
index 8230ce7..0000000
--- a/CLAUDE.md
+++ /dev/null
@@ -1,34 +0,0 @@
-# JavaPatterns — Шаблоны проектирования на Java
-
-## About
-
-Шаблоны проектирования на Java
-
-## Prerequisites
-
-- JDK 8+
-- Maven 3.x
-
-## Build & Run
-
-```bash
-mvn clean install
-mvn test
-```
-
-## Development Guidelines
-
-### Code Style
-- Follow standard Java conventions
-- Keep code clean and well-organized
-- Use meaningful variable and method names
-
-### Git Workflow
-- Write clear, descriptive commit messages
-- One logical change per commit
-- Test before committing
-
-### Testing
-- Write tests for new functionality
-- Run the full test suite before pushing
-- Keep tests focused and independent
diff --git a/pom.xml b/pom.xml
index b69156f..95edbf9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,10 +17,9 @@
 
     <dependencies>
         <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter</artifactId>
-            <version>5.11.4</version>
-            <scope>test</scope>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>RELEASE</version>
         </dependency>
     </dependencies>
 
@@ -31,7 +30,8 @@
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>
                     <configuration>
-                        <release>17</release>
+                        <source>1.8</source>
+                        <target>1.8</target>
                     </configuration>
                 </plugin>
                 <plugin>
@@ -41,50 +41,7 @@
                         <encoding>UTF-8</encoding>
                     </configuration>
                 </plugin>
-            
-            <!-- JaCoCo code coverage -->
-            <plugin>
-                <groupId>org.jacoco</groupId>
-                <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.12</version>
-                <executions>
-                    <execution>
-                        <id>prepare-agent</id>
-                        <goals><goal>prepare-agent</goal></goals>
-                    </execution>
-                    <execution>
-                        <id>report</id>
-                        <phase>test</phase>
-                        <goals><goal>report</goal></goals>
-                    </execution>
-                    <execution>
-                        <id>check</id>
-                        <phase>verify</phase>
-                        <goals><goal>check</goal></goals>
-                        <configuration>
-                            <rules>
-                                <rule>
-                                    <element>BUNDLE</element>
-                                    <limits>
-                                        <limit>
-                                            <counter>LINE</counter>
-                                            <value>COVEREDRATIO</value>
-                                            <minimum>1.00</minimum>
-                                        </limit>
-                                    </limits>
-                                </rule>
-                            </rules>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-        
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>3.5.2</version>
-            </plugin>
-        </plugins>
+            </plugins>
         </pluginManagement>
     </build>
 </project>
\ No newline at end of file