diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
new file mode 100644
index 0000000..01507d8
--- /dev/null
+++ b/.gitea/workflows/release.yml
@@ -0,0 +1,58 @@
+name: Release
+
+# Publishing a release builds every Minecraft version from the release's tag
+# and attaches the mod jars to it. The tag is the mod version (e.g.
+# 0.1.1-beta); a leading "v" is dropped.
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Set up Java 21
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+          cache: gradle
+
+      - name: Build all versions
+        env:
+          TAG: ${{ github.event.release.tag_name }}
+        run: |
+          VERSION="${TAG#v}"
+          echo "Building Saturn Client $VERSION"
+          chmod +x gradlew
+          # buildAll remaps every versions/* project in parallel into build/allJars.
+          ./gradlew buildAll -Pmod_version="$VERSION" --no-daemon --stacktrace
+
+      - name: Upload jars to the release
+        env:
+          TOKEN: ${{ secrets.GITEA_TOKEN }}
+          ASSETS_URL: ${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/${{ github.event.release.id }}/assets
+        run: |
+          shopt -s nullglob
+          jars=(build/allJars/*.jar)
+          if [ ${#jars[@]} -eq 0 ]; then
+            echo "No jars found in build/allJars" >&2
+            exit 1
+          fi
+
+          for jar in "${jars[@]}"; do
+            echo "Uploading $(basename "$jar")"
+            curl --fail-with-body -sS -X POST \
+              -H "Authorization: token $TOKEN" \
+              -F "attachment=@$jar" \
+              "$ASSETS_URL"
+            echo
+          done