diff --git a/.github/workflows/publish-play-store.yml b/.github/workflows/publish-play-store.yml
new file mode 100644
index 0000000..4c10f52
--- /dev/null
+++ b/.github/workflows/publish-play-store.yml
@@ -0,0 +1,58 @@
+name: Publish to Google Play Store
+
+on:
+  release:
+    types: [published]
+  push:
+    tags: ["v*"]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 17
+
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@v3
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Expo prebuild
+        run: npx expo prebuild --platform android --no-install
+
+      - name: Decode keystore
+        run: echo "${{ secrets.KEYSTORE_BASE64 }}" | base64 -d > android/app/release.keystore
+
+      - name: Build AAB
+        working-directory: android
+        env:
+          RELEASE_STORE_FILE: release.keystore
+          RELEASE_STORE_PASSWORD: ${{ secrets.KEYSTORE_PASSWORD }}
+          RELEASE_KEY_ALIAS: ${{ secrets.KEY_ALIAS }}
+          RELEASE_KEY_PASSWORD: ${{ secrets.KEY_PASSWORD }}
+        run: ./gradlew bundleRelease
+
+      - name: Upload AAB artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-release-bundle
+          path: android/app/build/outputs/bundle/release/app-release.aab
+
+      - name: Publish to Play Store
+        uses: r0adkll/upload-google-play@v1
+        with:
+          serviceAccountJsonPlainText: ${{ secrets.PLAY_STORE_SERVICE_ACCOUNT_JSON }}
+          packageName: ai.opencode.mobile
+          releaseFiles: android/app/build/outputs/bundle/release/app-release.aab
+          track: internal
+          status: completed
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..7a118b4
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,3 @@
+source "https://rubygems.org"
+
+gem "fastlane"
diff --git a/PUBLISHING.md b/PUBLISHING.md
new file mode 100644
index 0000000..05e4dab
--- /dev/null
+++ b/PUBLISHING.md
@@ -0,0 +1,54 @@
+# Publishing to Google Play Store
+
+## Required GitHub Secrets
+
+Configure these in **Settings > Secrets and variables > Actions**:
+
+| Secret | Description |
+|--------|-------------|
+| `PLAY_STORE_SERVICE_ACCOUNT_JSON` | Google Play Console service account JSON key (full JSON content) |
+| `KEYSTORE_BASE64` | Base64-encoded release keystore (`base64 -w0 release.keystore`) |
+| `KEYSTORE_PASSWORD` | Keystore password |
+| `KEY_ALIAS` | Key alias in the keystore |
+| `KEY_PASSWORD` | Key password |
+
+## Setup Steps
+
+### 1. Create a release keystore
+
+```bash
+keytool -genkeypair -v -storetype PKCS12 \
+  -keystore release.keystore -alias release \
+  -keyalg RSA -keysize 2048 -validity 10000
+```
+
+Encode it for GitHub secrets:
+```bash
+base64 -w0 release.keystore
+```
+
+### 2. Create a Google Play service account
+
+1. Go to [Google Cloud Console](https://console.cloud.google.com/) > IAM > Service Accounts
+2. Create a service account and download the JSON key
+3. In Google Play Console > Settings > API access, link the service account
+4. Grant it release management permissions for your app
+
+### 3. Workflow triggers
+
+The publish workflow runs on:
+- GitHub Release publish events
+- Tag pushes matching `v*`
+
+It builds an AAB (Android App Bundle), signs it with the release keystore, and uploads to the **internal** track. Promote to production via Play Console.
+
+## Fastlane (Alternative)
+
+A Fastlane setup is included for local publishing:
+
+```bash
+bundle install
+bundle exec fastlane android deploy
+```
+
+Set environment variables: `SUPPLY_JSON_KEY`, `RELEASE_STORE_FILE`, `RELEASE_STORE_PASSWORD`, `RELEASE_KEY_ALIAS`, `RELEASE_KEY_PASSWORD`.
diff --git a/android/app/build.gradle b/android/app/build.gradle
index 93f41d1..aa5873b 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -104,15 +104,21 @@ android {
             keyAlias 'androiddebugkey'
             keyPassword 'android'
         }
+        release {
+            if (System.getenv("RELEASE_STORE_FILE")) {
+                storeFile file(System.getenv("RELEASE_STORE_FILE"))
+                storePassword System.getenv("RELEASE_STORE_PASSWORD")
+                keyAlias System.getenv("RELEASE_KEY_ALIAS")
+                keyPassword System.getenv("RELEASE_KEY_PASSWORD")
+            }
+        }
     }
     buildTypes {
         debug {
             signingConfig signingConfigs.debug
         }
         release {
-            // Caution! In production, you need to generate your own keystore file.
-            // see https://reactnative.dev/docs/signed-apk-android.
-            signingConfig signingConfigs.debug
+            signingConfig System.getenv("RELEASE_STORE_FILE") ? signingConfigs.release : signingConfigs.debug
             def enableShrinkResources = findProperty('android.enableShrinkResourcesInReleaseBuilds') ?: 'false'
             shrinkResources enableShrinkResources.toBoolean()
             minifyEnabled enableMinifyInReleaseBuilds
diff --git a/fastlane/Fastfile b/fastlane/Fastfile
new file mode 100644
index 0000000..2927876
--- /dev/null
+++ b/fastlane/Fastfile
@@ -0,0 +1,21 @@
+default_platform(:android)
+
+platform :android do
+  desc "Build and publish to Google Play internal track"
+  lane :deploy do
+    gradle(
+      project_dir: "../android",
+      task: "bundle",
+      build_type: "Release"
+    )
+    upload_to_play_store(
+      package_name: "ai.opencode.mobile",
+      track: "internal",
+      aab: "../android/app/build/outputs/bundle/release/app-release.aab",
+      json_key: ENV["SUPPLY_JSON_KEY"] || "play-store-key.json",
+      skip_upload_metadata: true,
+      skip_upload_images: true,
+      skip_upload_screenshots: true
+    )
+  end
+end