diff --git a/.github/workflows/pre-merge.yml b/.github/workflows/pre-merge.yml
index 44c44fb..31df777 100644
--- a/.github/workflows/pre-merge.yml
+++ b/.github/workflows/pre-merge.yml
@@ -13,11 +13,30 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
       - uses: actions/setup-java@v4
         with:
           java-version: 21
           distribution: "adopt"
+      - uses: actions/setup-python@v5
+        with:
+         python-version: '3.13'
+      - name: Install Launchable command
+        run: pip install --user --upgrade launchable~=1.0
+      - name: Launchable verify
+        run: launchable verify
+      - name: Launchable record build
+        run: launchable record build --name ${{ github.run_id }}
       - name: Compile
         run: mvn compile
+      - name: Launchable subset
+        run: |
+         launchable record session --build ${{ github.run_id }} --observation --test-suite unit-test > session.txt
+         launchable subset --session $(cat session.txt) --target 50%  maven src/test/java > launchable-subset.txt
+         cat launchable-subset.txt
       - name: Test
-        run: mvn test
+        run: mvn test -Dsurefire.includesFile=launchable-subset.txt 
+      - name: Launchable record tests
+        if: always()
+        run: launchable record tests --session $(cat session.txt) maven ./**/target/surefire-reports
diff --git a/HANDSON0.md b/HANDSON0.md
index b8fe8f8..3059e85 100644
--- a/HANDSON0.md
+++ b/HANDSON0.md
@@ -1,4 +1,4 @@
-# Lab 0. Prerequisites
+# Lab 0. Prerequisites 
 
 The following are prerequisites for this workshop: