diff --git a/.forgejo/workflows/ci.yml b/.forgejo/workflows/ci.yml
new file mode 100644
index 0000000..33efbc2
--- /dev/null
+++ b/.forgejo/workflows/ci.yml
@@ -0,0 +1,26 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: "25"
+
+      - uses: gradle/actions/setup-gradle@v4
+
+      - name: Build and test
+        run: ./gradlew build --stacktrace
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: lattice
+          path: build/libs/*.jar