diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000000..3624e61fa2
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,53 @@
+name: Build and Test
+
+on:
+  push:
+    branches: [master, main]
+  pull_request:
+    branches: [master, main]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image: eclipse-temurin:17-jdk
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Ant
+        run: |
+          apt-get update
+          apt-get install -y ant
+
+      - name: Show versions
+        run: |
+          java -version
+          ant -version
+
+      - name: Build and test
+        run: ant all
+
+      - name: Upload jars
+        uses: actions/upload-artifact@v4
+        with:
+          name: opendis7-jars
+          path: dist/*.jar
+          retention-days: 30
+
+      - name: Upload javadoc
+        uses: actions/upload-artifact@v4
+        with:
+          name: opendis7-javadoc
+          path: dist/javadoc/
+          retention-days: 30
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: test-results
+          path: build/test/results/
+          retention-days: 14
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
new file mode 100644
index 0000000000..1f91e32a80
--- /dev/null
+++ b/.github/workflows/publish.yml
@@ -0,0 +1,55 @@
+name: Publish Release
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:
+
+jobs:
+  build-and-release:
+    runs-on: ubuntu-latest
+    container:
+      image: eclipse-temurin:17-jdk
+
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Ant and tools
+        run: |
+          apt-get update
+          apt-get install -y ant zip
+
+      - name: Build
+        run: ant all
+
+      - name: Create release bundle
+        run: |
+          mkdir -p release
+          cp dist/opendis7-*.jar release/
+          cp dist/license.txt release/
+          cp dist/license.html release/
+          cd release && zip -r ../opendis7-release.zip .
+
+      - name: Upload release assets
+        if: github.event_name == 'release'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          apt-get install -y gh
+          for jar in dist/opendis7-*.jar; do
+            gh release upload "${{ github.event.release.tag_name }}" "$jar" --clobber
+          done
+          gh release upload "${{ github.event.release.tag_name }}" opendis7-release.zip --clobber
+
+      - name: Upload artifacts
+        if: github.event_name == 'workflow_dispatch'
+        uses: actions/upload-artifact@v4
+        with:
+          name: opendis7-release
+          path: |
+            dist/opendis7-*.jar
+            opendis7-release.zip
diff --git a/build.xml b/build.xml
index 32dfa66e51..eb69ab4cd4 100644
--- a/build.xml
+++ b/build.xml
@@ -181,18 +181,24 @@ POSSIBILITY OF SUCH DAMAGE.
     
     <target name="view.issues.online" description="view online issues in web browser (NetBeans only)">
         <echo message="https://github.com/open-dis/opendis7-java/issues" />
+        <!-- nbbrowse requires NetBeans IDE; commented out for headless/CI compatibility -->
+        <!--<nbbrowse url="https://github.com/open-dis/opendis7-java/issues" />-->
         <!-- nbbrowse url= --> <echo message="https://github.com/open-dis/opendis7-java/issues" />
         <!-- TODO implementation-independent approach if possible, but note that other Ant approaches usually have to be customized for each OS. -->
     </target>
-    
+
     <target name="view.javadoc.local" description="view local package javadoc in web browser (NetBeans only)">
         <echo message="view local javadoc in ${dist.javadoc.dir} subdirectory"/>
+        <!-- nbbrowse requires NetBeans IDE; commented out for headless/CI compatibility -->
+        <!--<nbbrowse file="${dist.javadoc.dir}/index.html" />-->
         <!-- nbbrowse file="${dist.javadoc.dir}/index.html" -->
         <!-- TODO implementation-independent approach if possible, but note that other Ant approaches usually have to be customized for each OS. -->
     </target>
-    
+
     <target name="view.javadoc.online" description="view online package javadoc in web browser (NetBeans only)">
         <echo message="view online javadoc in dist/javadoc subdirectory"/>
+        <!-- nbbrowse requires NetBeans IDE; commented out for headless/CI compatibility -->
+        <!--<nbbrowse url="https://savage.nps.edu/opendis7-java/javadoc" />-->
         <!-- nbbrowse url= --> <echo message="https://savage.nps.edu/opendis7-java/javadoc" />
         <!-- TODO implementation-independent approach if possible, but note that other Ant approaches usually have to be customized for each OS. -->
     </target>