diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 2407e60..07fb1c7 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -7,6 +7,8 @@ on:
 env:
   PATH: /opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
   ANDROID_HOME: /Users/freetlab/Library/Android/sdk
+  KEYSTORE_PATH: /Users/freetlab/.openclaw/workspace/.secure/pluriwave/pluriwave-upload.jks
+  KEYSTORE_ALIAS: pluriwave-upload
 
 jobs:
   analizar:
@@ -16,8 +18,6 @@ jobs:
       - uses: actions/checkout@v4
       - name: Obtener dependencias
         run: flutter pub get
-      #- name: Generar l10n
-      #  run: flutter gen-l10n
       - name: Analizar código
         run: flutter analyze --no-fatal-infos --no-fatal-warnings
 
@@ -29,6 +29,21 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Configurar keystore de firma
+        env:
+          KEYSTORE_PASSWORD: ${{ secrets.PLURIWAVE_KEYSTORE_PASSWORD }}
+        run: |
+          echo "Verificando keystore..."
+          if [ ! -f "$KEYSTORE_PATH" ]; then
+            echo "ERROR: Keystore no encontrado en $KEYSTORE_PATH"
+            exit 1
+          fi
+          echo "storeFile=$KEYSTORE_PATH" > android/key.properties
+          echo "storePassword=$KEYSTORE_PASSWORD" >> android/key.properties
+          echo "keyAlias=$KEYSTORE_ALIAS" >> android/key.properties
+          echo "keyPassword=$KEYSTORE_PASSWORD" >> android/key.properties
+          echo "✅ Keystore configurado"
+
       - name: Bump versión patch + commit
         run: |
           git config user.name "ShanaiaBot"
@@ -59,15 +74,17 @@ jobs:
       - name: Obtener dependencias
         run: flutter pub get
 
-      #- name: Generar l10n
-      #  run: flutter gen-l10n
-
       - name: Build APK release
         run: flutter build apk --release
 
       - name: Build AAB release
         run: flutter build appbundle --release
 
+      - name: Verificar firma del AAB
+        run: |
+          echo "Verificando certificado del AAB..."
+          keytool -list -v -keystore "$KEYSTORE_PATH" -alias $KEYSTORE_ALIAS -storepass "$KEYSTORE_PASSWORD" 2>/dev/null | grep "SHA1:\|SHA256:" || echo "No se pudo verificar"
+
       - name: Publicar en ftl-builds (Zimaboard)
         run: |
           VERSION="${{ steps.version.outputs.version }}"
@@ -94,7 +111,7 @@ jobs:
           BOT_TOKEN=$(plutil -extract 'EnvironmentVariables:TELEGRAM_BOT_TOKEN' raw /Users/freetlab/Library/LaunchAgents/ai.openclaw.gateway.plist 2>/dev/null || echo "")
           if [ -z "$BOT_TOKEN" ]; then exit 0; fi
           if [ "${{ job.status }}" = "success" ]; then
-            MSG="✅ *Pluriwave* v${VERSION} build OK · ${COMMIT}%0AAPK + AAB en builds.freetimelab.es"
+            MSG="✅ *Pluriwave* v${VERSION} build OK (firma release) · ${COMMIT}%0AAPK + AAB en builds.freetimelab.es"
           else
             MSG="❌ *Pluriwave* v${VERSION} build FAILED · ${COMMIT}"
           fi
diff --git a/android/app/build.gradle.kts b/android/app/build.gradle.kts
index 4309abf..5a07010 100644
--- a/android/app/build.gradle.kts
+++ b/android/app/build.gradle.kts
@@ -1,7 +1,6 @@
 plugins {
     id("com.android.application")
     id("kotlin-android")
-    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id("dev.flutter.flutter-gradle-plugin")
 }
 
@@ -20,21 +19,24 @@ android {
     }
 
     defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId = "es.freetimelab.pluriwave"
-        // You can update the following values to match your application needs.
-        // For more information, see: https://flutter.dev/to/review-gradle-config.
         minSdk = flutter.minSdkVersion
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode
         versionName = flutter.versionName
     }
 
+    signingConfigs {
+        create("release") {
+            // Configurado por el workflow via android/key.properties
+            // Keystore: ~/.openclaw/workspace/.secure/pluriwave/pluriwave-upload.jks
+            // Alias: pluriwave-upload
+        }
+    }
+
     buildTypes {
         release {
-            // TODO: Add your own signing config for the release build.
-            // Signing with the debug keys for now, so `flutter run --release` works.
-            signingConfig = signingConfigs.getByName("debug")
+            signingConfig = signingConfigs.getByName("release")
         }
     }
 }