diff --git a/.forgejo/workflows/release.yml b/.forgejo/workflows/release.yml
index ea102e8..e52d86c 100644
--- a/.forgejo/workflows/release.yml
+++ b/.forgejo/workflows/release.yml
@@ -18,10 +18,15 @@
 #   SUPPLY_JSON_KEY_DATA   Google Play service-account JSON
 #
 # NOTE: `runs-on` must match a label your Forgejo runner registered with.
-# fdroid_reference runs as a 3-way ABI matrix (not one job building all 3
-# sequentially): each ABI needs its own NDK/tesseract-native/flutter compile
-# from a cold cache, which triggered the runner's max-job-runtime kill when
-# done back-to-back in a single job. One ABI per job fits comfortably.
+# fdroid_reference is 3 separate jobs chained with `needs:` (armeabi-v7a ->
+# arm64-v8a -> x86_64), NOT a matrix: this runner's act_runner does not honor
+# `strategy.max-parallel`, so a matrix always ran all 3 concurrently — 2-3
+# simultaneous cold NDK/CMake/Gradle builds contend for RAM and get OOM-killed
+# (silent "Gradle build daemon disappeared", no error message). `needs:` is
+# core Actions syntax with no such gap, so it actually serializes them. Each
+# needs its own full cold NDK+tesseract-native+flutter compile (~30-35min
+# alone), which is why they're chained rather than run in one job (that alone
+# was too slow even for a 90m timeout).
 
 name: release
 
@@ -98,36 +103,20 @@ jobs:
         working-directory: apps/app_seeds
         run: rm -f android/key.properties "$GITHUB_WORKSPACE/tane-upload.jks"
 
-  fdroid_reference:
-    strategy:
-      # Sequential, not parallel: 2-3 concurrent NDK/CMake/Gradle builds on the
-      # same host contend for RAM and get OOM-killed (silent truncated log, no
-      # "max run time" message) — confirmed 2026-07-21 when only the ABI that
-      # ended up running alone (after the other two died) completed. One at a
-      # time is slower (~30-35min x3) but fits comfortably in the 90m timeout.
-      max-parallel: 1
-      matrix:
-        abi: [armeabi-v7a, arm64-v8a, x86_64]
-        include:
-          - abi: armeabi-v7a
-            offset: 1
-          - abi: arm64-v8a
-            offset: 2
-          - abi: x86_64
-            offset: 3
+  fdroid_reference_armeabi_v7a:
     runs-on: docker
     container:
       image: registry.gitlab.com/fdroid/fdroidserver:buildserver-trixie
     steps:
-      - name: Build the ${{ matrix.abi }} reference APK with fdroid, sign, and attach it
+      - name: Build the armeabi-v7a reference APK with fdroid, sign, and attach it
         env:
           TOKEN: ${{ github.token }}
           TANE_KEYSTORE_BASE64: ${{ secrets.TANE_KEYSTORE_BASE64 }}
           TANE_KEYSTORE_PASSWORD: ${{ secrets.TANE_KEYSTORE_PASSWORD }}
           TANE_KEY_ALIAS: ${{ secrets.TANE_KEY_ALIAS }}
           TANE_KEY_PASSWORD: ${{ secrets.TANE_KEY_PASSWORD }}
-          ABI: ${{ matrix.abi }}
-          OFFSET: ${{ matrix.offset }}
+          ABI: armeabi-v7a
+          OFFSET: 1
         run: |
           set -eu
 
@@ -228,3 +217,167 @@ jobs:
           else
             echo "built+signed app-${ABI}-release.apk (dispatch: upload skipped)"
           fi
+
+  fdroid_reference_arm64_v8a:
+    needs: fdroid_reference_armeabi_v7a
+    runs-on: docker
+    container:
+      image: registry.gitlab.com/fdroid/fdroidserver:buildserver-trixie
+    steps:
+      - name: Build the arm64-v8a reference APK with fdroid, sign, and attach it
+        env:
+          TOKEN: ${{ github.token }}
+          TANE_KEYSTORE_BASE64: ${{ secrets.TANE_KEYSTORE_BASE64 }}
+          TANE_KEYSTORE_PASSWORD: ${{ secrets.TANE_KEYSTORE_PASSWORD }}
+          TANE_KEY_ALIAS: ${{ secrets.TANE_KEY_ALIAS }}
+          TANE_KEY_PASSWORD: ${{ secrets.TANE_KEY_PASSWORD }}
+          ABI: arm64-v8a
+          OFFSET: 2
+        run: |
+          set -eu
+          sh /opt/buildserver/setup-env-vars /opt/android-sdk
+          . /etc/profile.d/bsenv.sh
+          fds=/opt/fdroidserver-src
+          mkdir -p "$fds"
+          curl -sL https://gitlab.com/fdroid/fdroidserver/-/archive/master/fdroidserver-master.tar.gz \
+            | tar -xz -C "$fds" --strip-components=1
+          export PATH="$fds:$PATH"
+          export PYTHONPATH="$fds:$fds/examples"
+          git config --global --add safe.directory '*'
+          git config --global url."http://x-access-token:${TOKEN}@forgejo:3000/".insteadOf "https://git.comunes.org/"
+          work=/tmp/tane-src
+          mkdir -p "$work" && cd "$work"
+          git init -q .
+          git remote add origin "http://x-access-token:${TOKEN}@forgejo:3000/${GITHUB_REPOSITORY}.git"
+          git fetch -q --depth 1 origin "${GITHUB_SHA}"
+          git checkout -q FETCH_HEAD
+          base=$(sed -n -E 's/^version:.*\+([0-9]+)$/\1/p' apps/app_seeds/pubspec.yaml)
+          [ -n "$base" ]
+          vc=$((base * 10 + OFFSET))
+          fdd=/tmp/fdroiddata
+          mkdir -p "$fdd/metadata" "$fdd/srclibs"
+          cp "$work/fdroid-ci/config.yml" "$fdd/config.yml"
+          cp "$work"/fdroid-ci/srclibs/*.yml "$fdd/srclibs/"
+          cp "$work/docs/fdroid/org.comunes.tane.yml" "$fdd/metadata/org.comunes.tane.yml"
+          cd "$fdd"
+          sed -i "s#^\( *commit: \).*#\1${GITHUB_SHA}#" metadata/org.comunes.tane.yml
+          sed -i '/^ *binary: /d' metadata/org.comunes.tane.yml
+          mkdir -p build
+          git clone -q https://git.comunes.org/comunes/tane.git build/org.comunes.tane
+          git -C build/org.comunes.tane checkout -q "${GITHUB_SHA}"
+          fdroid build --verbose --no-tarball "org.comunes.tane:${vc}"
+          f="unsigned/org.comunes.tane_${vc}.apk"
+          if [ ! -f "$f" ]; then
+            echo "expected $f, not found" >&2
+            tail -n 80 logs/*.log 2>/dev/null || true
+            exit 1
+          fi
+          apksigner=$(find "$ANDROID_HOME" -name apksigner -type f 2>/dev/null | sort -V | tail -1)
+          if [ -z "$apksigner" ]; then
+            yes | sdkmanager "build-tools;34.0.0" >/dev/null 2>&1 || true
+            apksigner=$(find "$ANDROID_HOME" -name apksigner -type f 2>/dev/null | sort -V | tail -1)
+          fi
+          echo "$TANE_KEYSTORE_BASE64" | base64 -d > /tmp/ks.jks
+          out="/tmp/app-${ABI}-release.apk"
+          "$apksigner" sign --ks /tmp/ks.jks --ks-key-alias "$TANE_KEY_ALIAS" \
+            --ks-pass "pass:$TANE_KEYSTORE_PASSWORD" --key-pass "pass:$TANE_KEY_PASSWORD" \
+            --out "$out" "$f"
+          "$apksigner" verify --print-certs "$out" | grep -i 'SHA-256' || true
+          rm -f /tmp/ks.jks
+          api="http://forgejo:3000/api/v1/repos/${GITHUB_REPOSITORY}"
+          tag="${GITHUB_REF_NAME}"
+          if [ "${GITHUB_REF_TYPE:-}" = tag ]; then
+            curl -sf -X POST "$api/releases" \
+              -H "Authorization: token ${TOKEN}" -H 'Content-Type: application/json' \
+              -d "{\"tag_name\":\"${tag}\",\"name\":\"${tag}\"}" >/dev/null || true
+            rid=$(curl -sf -H "Authorization: token ${TOKEN}" "$api/releases/tags/${tag}" \
+              | python3 -c 'import sys,json;print(json.load(sys.stdin)["id"])')
+            curl -sf -X POST "$api/releases/${rid}/assets?name=app-${ABI}-release.apk" \
+              -H "Authorization: token ${TOKEN}" \
+              -F "attachment=@${out};type=application/vnd.android.package-archive"
+            echo "uploaded app-${ABI}-release.apk (from ${f##*/})"
+          else
+            echo "built+signed app-${ABI}-release.apk (dispatch: upload skipped)"
+          fi
+
+  fdroid_reference_x86_64:
+    needs: fdroid_reference_arm64_v8a
+    runs-on: docker
+    container:
+      image: registry.gitlab.com/fdroid/fdroidserver:buildserver-trixie
+    steps:
+      - name: Build the x86_64 reference APK with fdroid, sign, and attach it
+        env:
+          TOKEN: ${{ github.token }}
+          TANE_KEYSTORE_BASE64: ${{ secrets.TANE_KEYSTORE_BASE64 }}
+          TANE_KEYSTORE_PASSWORD: ${{ secrets.TANE_KEYSTORE_PASSWORD }}
+          TANE_KEY_ALIAS: ${{ secrets.TANE_KEY_ALIAS }}
+          TANE_KEY_PASSWORD: ${{ secrets.TANE_KEY_PASSWORD }}
+          ABI: x86_64
+          OFFSET: 3
+        run: |
+          set -eu
+          sh /opt/buildserver/setup-env-vars /opt/android-sdk
+          . /etc/profile.d/bsenv.sh
+          fds=/opt/fdroidserver-src
+          mkdir -p "$fds"
+          curl -sL https://gitlab.com/fdroid/fdroidserver/-/archive/master/fdroidserver-master.tar.gz \
+            | tar -xz -C "$fds" --strip-components=1
+          export PATH="$fds:$PATH"
+          export PYTHONPATH="$fds:$fds/examples"
+          git config --global --add safe.directory '*'
+          git config --global url."http://x-access-token:${TOKEN}@forgejo:3000/".insteadOf "https://git.comunes.org/"
+          work=/tmp/tane-src
+          mkdir -p "$work" && cd "$work"
+          git init -q .
+          git remote add origin "http://x-access-token:${TOKEN}@forgejo:3000/${GITHUB_REPOSITORY}.git"
+          git fetch -q --depth 1 origin "${GITHUB_SHA}"
+          git checkout -q FETCH_HEAD
+          base=$(sed -n -E 's/^version:.*\+([0-9]+)$/\1/p' apps/app_seeds/pubspec.yaml)
+          [ -n "$base" ]
+          vc=$((base * 10 + OFFSET))
+          fdd=/tmp/fdroiddata
+          mkdir -p "$fdd/metadata" "$fdd/srclibs"
+          cp "$work/fdroid-ci/config.yml" "$fdd/config.yml"
+          cp "$work"/fdroid-ci/srclibs/*.yml "$fdd/srclibs/"
+          cp "$work/docs/fdroid/org.comunes.tane.yml" "$fdd/metadata/org.comunes.tane.yml"
+          cd "$fdd"
+          sed -i "s#^\( *commit: \).*#\1${GITHUB_SHA}#" metadata/org.comunes.tane.yml
+          sed -i '/^ *binary: /d' metadata/org.comunes.tane.yml
+          mkdir -p build
+          git clone -q https://git.comunes.org/comunes/tane.git build/org.comunes.tane
+          git -C build/org.comunes.tane checkout -q "${GITHUB_SHA}"
+          fdroid build --verbose --no-tarball "org.comunes.tane:${vc}"
+          f="unsigned/org.comunes.tane_${vc}.apk"
+          if [ ! -f "$f" ]; then
+            echo "expected $f, not found" >&2
+            tail -n 80 logs/*.log 2>/dev/null || true
+            exit 1
+          fi
+          apksigner=$(find "$ANDROID_HOME" -name apksigner -type f 2>/dev/null | sort -V | tail -1)
+          if [ -z "$apksigner" ]; then
+            yes | sdkmanager "build-tools;34.0.0" >/dev/null 2>&1 || true
+            apksigner=$(find "$ANDROID_HOME" -name apksigner -type f 2>/dev/null | sort -V | tail -1)
+          fi
+          echo "$TANE_KEYSTORE_BASE64" | base64 -d > /tmp/ks.jks
+          out="/tmp/app-${ABI}-release.apk"
+          "$apksigner" sign --ks /tmp/ks.jks --ks-key-alias "$TANE_KEY_ALIAS" \
+            --ks-pass "pass:$TANE_KEYSTORE_PASSWORD" --key-pass "pass:$TANE_KEY_PASSWORD" \
+            --out "$out" "$f"
+          "$apksigner" verify --print-certs "$out" | grep -i 'SHA-256' || true
+          rm -f /tmp/ks.jks
+          api="http://forgejo:3000/api/v1/repos/${GITHUB_REPOSITORY}"
+          tag="${GITHUB_REF_NAME}"
+          if [ "${GITHUB_REF_TYPE:-}" = tag ]; then
+            curl -sf -X POST "$api/releases" \
+              -H "Authorization: token ${TOKEN}" -H 'Content-Type: application/json' \
+              -d "{\"tag_name\":\"${tag}\",\"name\":\"${tag}\"}" >/dev/null || true
+            rid=$(curl -sf -H "Authorization: token ${TOKEN}" "$api/releases/tags/${tag}" \
+              | python3 -c 'import sys,json;print(json.load(sys.stdin)["id"])')
+            curl -sf -X POST "$api/releases/${rid}/assets?name=app-${ABI}-release.apk" \
+              -H "Authorization: token ${TOKEN}" \
+              -F "attachment=@${out};type=application/vnd.android.package-archive"
+            echo "uploaded app-${ABI}-release.apk (from ${f##*/})"
+          else
+            echo "built+signed app-${ABI}-release.apk (dispatch: upload skipped)"
+          fi