diff --git a/fdroid-publish/README.md b/fdroid-publish/README.md
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+++ b/fdroid-publish/README.md
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+# fdroid-publish — публикация APK в F-Droid
+
+Подписывает APK (v1+v2, keystore из переменных Gitea) и публикует в F-Droid репозиторий, затем пересобирает индекс (`fdroid update`).
+
+## Использование
+
+В workflow проекта (по образцу `build-docker` / `helm-publish`):
+
+```yaml
+- name: Build APK
+  uses: https://git.binom.pw/subochev/devops/build-gradle@main
+  with:
+    target: assembleRelease
+
+- name: Publish to F-Droid
+  uses: https://git.binom.pw/subochev/devops/fdroid-publish@main
+  with:
+    apk_path: "app/build/outputs/apk/release/app-release-unsigned.apk"
+```
+
+## Переменные (user-level, Gitea → Settings → Actions → Variables)
+
+| Переменная | Назначение |
+|---|---|
+| `ANDROID_KEYSTORE_B64` | keystore подписи приложений в base64 |
+| `ANDROID_KEYSTORE_PASSWORD` | пароль keystore |
+| `ANDROID_KEY_ALIAS` | алиас ключа (binom) |
+| `ANDROID_KEY_PASSWORD` | пароль ключа |
+| `FROID_HOST` | F-Droid LXC (192.168.76.165) |
+| `FROID_SSH_USER` | root |
+| `FROID_SSH_KEY` | приватный SSH-ключ CI (ed25519) |
+
+## Что происходит
+
+1. Setup Java 21
+2. Декодирует keystore, подписывает APK через uber-apk-signer (v1+v2)
+3. `scp` подписанного APK в `/opt/fdroid/repo/` на F-Droid LXC
+4. `ssh "cd /opt/fdroid && fdroid update"` — пересборка индекса
+
+После этого F-Droid-клиенты на устройствах подтянут обновление автоматически.
+
+## Инфраструктура (см. скилл `fdroid-repo`)
+
+- LXC 192.168.76.165: fdroidserver 2.4.2, репозиторий `/opt/fdroid/repo` (единый источник; nginx монтирует его в контейнер)
+- URL репозитория: `https://fdroid.binom.pw/repo/`
+- keystore подписи приложений: `/opt/fdroid/android-release.keystore` (alias binom)
diff --git a/fdroid-publish/action.yml b/fdroid-publish/action.yml
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+name: "Publish APK to F-Droid"
+description: "Sign APK (v1+v2) and publish to the F-Droid repository, then rebuild the index"
+
+inputs:
+  apk_path:
+    description: "Path to the APK to sign and publish"
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - name: Setup Java
+      uses: actions/setup-java@v4
+      with:
+        java-version: 21
+        distribution: "adopt"
+
+    - name: Sign APK
+      shell: bash
+      env:
+        KEYSTORE_B64: ${{ vars.ANDROID_KEYSTORE_B64 }}
+        KEYSTORE_PASS: ${{ vars.ANDROID_KEYSTORE_PASSWORD }}
+        KEY_ALIAS: ${{ vars.ANDROID_KEY_ALIAS }}
+        KEY_PASS: ${{ vars.ANDROID_KEY_PASSWORD }}
+      run: |
+        set -euo pipefail
+        echo "Signing ${{ inputs.apk_path }}"
+        echo "$KEYSTORE_B64" | base64 -d > /tmp/release.keystore
+        curl -sL -o /tmp/uber-apk-signer.jar \
+          https://github.com/patrickfav/uber-apk-signer/releases/download/v1.3.0/uber-apk-signer-1.3.0.jar
+        java -jar /tmp/uber-apk-signer.jar \
+          -a "${{ inputs.apk_path }}" \
+          --ks /tmp/release.keystore \
+          --ksAlias "$KEY_ALIAS" \
+          --ksPass "$KEYSTORE_PASS" \
+          --ksKeyPass "$KEY_PASS" \
+          --allowResign \
+          -o /tmp/apk-out
+        echo "Signed APK:"
+        ls -la /tmp/apk-out/*.apk
+
+    - name: Push to F-Droid repo and rebuild index
+      shell: bash
+      env:
+        FROID_HOST: ${{ vars.FROID_HOST }}
+        FROID_SSH_USER: ${{ vars.FROID_SSH_USER }}
+        FROID_SSH_KEY: ${{ vars.FROID_SSH_KEY }}
+      run: |
+        set -euo pipefail
+        mkdir -p ~/.ssh && chmod 700 ~/.ssh
+        echo "$FROID_SSH_KEY" > ~/.ssh/froid_ci && chmod 600 ~/.ssh/froid_ci
+        APK=$(ls /tmp/apk-out/*.apk | head -1)
+        echo "Uploading $(basename "$APK") to ${FROID_SSH_USER}@${FROID_HOST}:/opt/fdroid/repo/"
+        scp -i ~/.ssh/froid_ci -o StrictHostKeyChecking=accept-new "$APK" \
+          "${FROID_SSH_USER}@${FROID_HOST}:/opt/fdroid/repo/"
+        ssh -i ~/.ssh/froid_ci "${FROID_SSH_USER}@${FROID_HOST}" \
+          "cd /opt/fdroid && fdroid update"
+        echo "Done. F-Droid repo: https://fdroid.binom.pw/repo/"