diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6cb966b..d821eea 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -62,3 +62,39 @@ jobs:
         run: |
           ./mvnw -B spring-boot:run &
           ab -p src/test/resources/apachebench/create-customer-request.json -T application/json -c 10 -n 1000 http://localhost:8080/api/customers
+
+  pact-contract-tests:
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    name: pact-contract-tests
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: 'adopt'
+          java-package: 'jdk'
+          cache: 'maven'
+
+      - name: Start Pact Broker infrastructure
+        run: docker compose --file spring-boot-example/docker-pact-broker-compose.yml up -d
+
+      - name: Run consumer contract tests
+        working-directory: spring-boot-example
+        run: ./mvnw -B test -Dtest=StockApiContractTest
+
+      - name: Publish pacts to broker
+        working-directory: spring-boot-example
+        run: ./mvnw -B pact:publish
+
+      - name: Run provider verification tests
+        working-directory: spring-boot-example
+        run: ./mvnw -B test -Dtest=StockApiProviderTest -DdisablePactVerification=false
+
+      - name: Clean up Docker containers
+        if: always()
+        run: |
+          docker compose --file spring-boot-example/docker-pact-broker-compose.yml down -v
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..83a5609
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,107 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Repository Overview
+
+This is the Java Testing Toolbox - a comprehensive educational repository demonstrating 30 testing tools and libraries for Java developers. The codebase contains practical examples for the book "30 Testing Tools & Libraries Every Java Developer Must Know".
+
+## Architecture
+
+### Module Structure
+- **spring-boot-example**: Main module containing most testing examples. Each testing tool has its own package under `src/test/java/de/rieckpil/blog/`
+- **jakarta-ee-example**: Demonstrates testing in Jakarta EE context, primarily MicroShed Testing
+
+### Test Organization
+- Unit tests: `*Test.java` or `*Spec.groovy`
+- Integration tests: `*IT.java`
+- Web tests: `*WT.java`
+- Performance tests: Located in `gatling` package
+- All test examples are self-contained within their respective packages
+
+## Essential Commands
+
+### Spring Boot Example
+
+```bash
+# Build and run all tests
+./mvnw verify
+
+# Run unit tests only
+./mvnw test
+
+# Run integration tests only
+./mvnw failsafe:integration-test
+
+# Run specific test class
+./mvnw test -Dtest=UserRegistrationServiceTest
+
+# Start the application (requires Docker)
+docker-compose up -d
+./mvnw spring-boot:run
+
+# Run Gatling performance tests (requires running application)
+./mvnw gatling:test
+
+# Run mutation testing
+./mvnw pitest:mutationCoverage
+
+# Generate JGiven reports
+./mvnw jgiven:report
+
+# Run Pact consumer tests
+./mvnw test -Dtest=StockApiContractTest
+
+# Publish pacts to broker (requires running Pact Broker)
+docker-compose -f docker-pact-broker-compose.yml up -d
+./mvnw pact:publish
+
+# Run Pact provider verification tests (by default skipped with system property)
+./mvnw test -Dtest=StockApiProviderTest
+```
+
+### Jakarta EE Example
+
+```bash
+# Build and run all tests
+./mvnw verify
+
+# Run unit tests only
+./mvnw test
+
+# Run integration tests
+./mvnw failsafe:integration-test
+
+# Start Liberty server
+./mvnw liberty:run
+```
+
+## Key Testing Patterns
+
+### Test Infrastructure
+
+- **Testcontainers**: Used extensively for integration tests requiring databases or external services
+- **Docker Compose**: Provides PostgreSQL and other services for local development
+- **MockWebServer/WireMock**: For mocking external HTTP services
+- **LocalStack**: For testing AWS services locally
+
+### Testing Frameworks Coverage
+
+The repository demonstrates these testing categories:
+
+1. Test Runners: JUnit 4/5, TestNG, Spock
+2. Assertions: AssertJ, Hamcrest, JsonPath, XMLUnit, JSONAssert
+3. Mocking: Mockito, WireMock, MockWebServer
+4. Integration: Testcontainers, REST Assured, MicroShed Testing
+5. Web Testing: Selenium, Selenide
+6. Performance: Gatling, JMH, JfrUnit
+7. Contract Testing: Pact
+8. Architecture Testing: ArchUnit
+
+### Important Conventions
+
+- Java 21 is required for all modules
+- Docker must be running for integration tests
+- Test output is redirected to files in CI/CD environments
+- Each testing tool example is isolated in its own package
+- Examples demonstrate real-world usage patterns, not just basic syntax
diff --git a/spring-boot-example/pom.xml b/spring-boot-example/pom.xml
index 7e856f4..4acf494 100644
--- a/spring-boot-example/pom.xml
+++ b/spring-boot-example/pom.xml
@@ -381,6 +381,9 @@
         <dependencies>
         </dependencies>
         <configuration>
+          <systemPropertyVariables>
+            <disablePactVerification>true</disablePactVerification>
+          </systemPropertyVariables>
           <includes>
             <include>**/*Spec.java</include>
             <include>**/*Test.java</include>
diff --git a/spring-boot-example/src/test/java/de/rieckpil/blog/pact/StockApiProviderTest.java b/spring-boot-example/src/test/java/de/rieckpil/blog/pact/StockApiProviderTest.java
index 6acf17b..504c563 100644
--- a/spring-boot-example/src/test/java/de/rieckpil/blog/pact/StockApiProviderTest.java
+++ b/spring-boot-example/src/test/java/de/rieckpil/blog/pact/StockApiProviderTest.java
@@ -1,4 +1,4 @@
-package au.com.dius.pactworkshop.provider;
+package de.rieckpil.blog.pact;
 
 import au.com.dius.pact.provider.junit5.HttpTestTarget;
 import au.com.dius.pact.provider.junit5.PactVerificationContext;
@@ -10,16 +10,16 @@
 import de.rieckpil.blog.Application;
 import org.apache.hc.core5.http.HttpRequest;
 import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.TestTemplate;
+import org.junit.jupiter.api.condition.DisabledIfSystemProperty;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.web.server.LocalServerPort;
 
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
 
-@Disabled("Requires running Pact Broker, see Docker Compose")
 @Provider("stock-api")
+@DisabledIfSystemProperty(named = "disablePactVerification", matches = "true", disabledReason = "Requires running Pact Broker, see Docker Compose")
 @PactBroker(url = "http://localhost:9292/", authentication =  @PactBrokerAuth(username = "pact-sample", password = "pact-sample"))
 @SpringBootTest(webEnvironment = RANDOM_PORT, classes = Application.class)
 public class StockApiProviderTest {