diff --git a/.github/workflows/pull-request-merge-check.yml b/.github/workflows/pull-request-merge-check.yml
index 7326f383..1fa54bf5 100644
--- a/.github/workflows/pull-request-merge-check.yml
+++ b/.github/workflows/pull-request-merge-check.yml
@@ -26,6 +26,8 @@ jobs:
     outputs:
       core: ${{ steps.filter.outputs.core }}
       mastodon: ${{ steps.filter.outputs.mastodon }}
+      activitypub: ${{ steps.filter.outputs.ap }}
+      owl: $${{ steps.filter.outputs.owl }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -108,6 +110,64 @@ jobs:
       - name: Build
         run: ./gradlew :hideout-mastodon:classes --no-daemon
 
+  hideout-activitypub-setup:
+    needs:
+      - change
+    if: github.event.pull_request.draft == false && needs.change.outputs.activitypub == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.PAT }}
+
+      - name: Gradle Wrapper Validation
+        uses: gradle/actions/wrapper-validation@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+        with:
+          cache-read-only: false
+          gradle-home-cache-cleanup: true
+
+      - name: Build
+        run: ./gradlew :hideout-activitypub:classes --no-daemon
+
+  owl-setup:
+    needs:
+      - change
+    if: github.event.pull_request.draft == false && needs.change.outputs.owl == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.PAT }}
+
+      - name: Gradle Wrapper Validation
+        uses: gradle/actions/wrapper-validation@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+        with:
+          cache-read-only: false
+          gradle-home-cache-cleanup: true
+
+      - name: Build
+        run: ./owl/gradlew :owl:classes --no-daemon
+
   hideout-core-unit-test:
     needs:
       - hideout-core-setup
@@ -187,11 +247,90 @@ jobs:
           name: 'hideout-mastodon.xml'
           path: 'hideout-mastodon/build/reports/kover/hideout-mastodon.xml'
 
+  hideout-activitypub-unit-test:
+    needs:
+      - hideout-activitypub-setup
+      - change
+    if: github.event.pull_request.draft == false && needs.change.outputs.activitypub == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.PAT }}
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+        with:
+          cache-read-only: false
+          gradle-home-cache-cleanup: true
+
+      - name: Unit Test
+        run: ./hideout-activitypub/gradlew :hideout-activitypub:koverXmlReport
+
+      - name: JUnit Test Report
+        uses: mikepenz/action-junit-report@v4
+        with:
+          report_paths: '**/TEST-*.xml'
+          check_name: 'hideout-activitypub JUnit Test Report'
+
+      - name: Upload Coverage Report
+        uses: actions/upload-artifact@v4
+        with:
+          name: 'hideout-activitypub.xml'
+          path: 'hideout-activitypub/build/reports/kover/hideout-activitypub.xml'
+
+  owl-unit-test:
+    needs:
+      - owl-setup
+      - change
+    if: github.event.pull_request.draft == false && needs.change.outputs.owl == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.PAT }}
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+        with:
+          cache-read-only: false
+          gradle-home-cache-cleanup: true
+
+      - name: Unit Test
+        run: ./owl/gradlew :owl:koverXmlReport
+
+      - name: JUnit Test Report
+        uses: mikepenz/action-junit-report@v4
+        with:
+          report_paths: '**/TEST-*.xml'
+          check_name: 'owl JUnit Test Report'
+
+      - name: Upload Coverage Report
+        uses: actions/upload-artifact@v4
+        with:
+          name: 'owl.xml'
+          path: 'owl/build/reports/kover/owl.xml'
+
   coverage:
     needs:
       - change
       - hideout-core-unit-test
       - hideout-mastodon-unit-test
+      - hideout-activitypub-unit-test
     runs-on: ubuntu-latest
     steps:
       - name: Download Coverage Report
@@ -204,7 +343,9 @@ jobs:
         with:
           paths: |
             ${{ github.workspace }}/hideout-core/build/reports/kover/hideout-core.xml/hideout-core.xml,
-            ${{ github.workspace }}/hideout-core/build/reports/kover/hideout-mastodon.xml/hideout-mastodon.xml
+            ${{ github.workspace }}/hideout-core/build/reports/kover/hideout-mastodon.xml/hideout-mastodon.xml,
+            ${{ github.workspace }}/hideout-core/build/reports/kover/hideout-activitypub.xml/hideout-activitypub.xml
+            ${{ github.workspace }}/hideout-core/build/reports/kover/owl.xml/owl.xml
           token: ${{ secrets.GITHUB_TOKEN }}
           title: Code Coverage
           update-comment: true
@@ -216,6 +357,8 @@ jobs:
       - change
       - hideout-core-setup
       - hideout-mastodon-setup
+      - hideout-activitypub-setup
+      - owl-setup
     runs-on: ubuntu-latest
     permissions:
       contents: write
@@ -239,7 +382,11 @@ jobs:
           gradle-home-cache-cleanup: true
 
       - name: Lint
-        run: ./gradlew :hideout-core:detektMain :hideout-mastodon:detektMain
+        run: ./gradlew :hideout-core:detektMain :hideout-mastodon:detektMain :hideout-activitypub:detektMain
+
+      - name: owl Lint
+        if: always()
+        run: ./owl/gradlew :owl:detektMain
 
       - name: Auto Commit
         if: ${{ always() }}