From c1227bc8c5a4c1d4c2de43584b06aa47d57ca6f7 Mon Sep 17 00:00:00 2001
From: Eliot Gevers <eliot.gevers@gmail.com>
Date: Tue, 29 Sep 2026 15:14:50 +0200
Subject: [PATCH 1/2] test(expo): enable R8 in Android release tests

---
 .changeset/quiet-expo-release-check.md  | 2 ++
 .github/workflows/expo-native-build.yml | 6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/quiet-expo-release-check.md

diff --git a/.changeset/quiet-expo-release-check.md b/.changeset/quiet-expo-release-check.md
new file mode 100644
index 00000000000..a845151cc84
--- /dev/null
+++ b/.changeset/quiet-expo-release-check.md
@@ -0,0 +1,2 @@
+---
+---
diff --git a/.github/workflows/expo-native-build.yml b/.github/workflows/expo-native-build.yml
index c4f1573535b..86f844aeb19 100644
--- a/.github/workflows/expo-native-build.yml
+++ b/.github/workflows/expo-native-build.yml
@@ -106,7 +106,7 @@ jobs:
         with:
           path: ${{ steps.native-build-key.outputs.artifact }}
           # Bump the version when native build commands change.
-          key: expo-native-build-v1-${{ runner.os }}-${{ matrix.expo-sdk }}-${{ matrix.platform }}-${{ matrix.run-e2e == true && 'e2e' || 'build' }}-${{ env.E2E_INSTANCE_NAME }}-${{ steps.native-build-key.outputs.hash }}
+          key: expo-native-build-minified-v2-${{ runner.os }}-${{ matrix.expo-sdk }}-${{ matrix.platform }}-${{ matrix.run-e2e == true && 'e2e' || 'build' }}-${{ env.E2E_INSTANCE_NAME }}-${{ steps.native-build-key.outputs.hash }}
 
       - if: steps.native-build-cache.outputs.cache-hit != 'true'
         uses: pnpm/action-setup@b906affcce14559ad1aafd4ab0e942779e9f58b1 # v4
@@ -211,7 +211,9 @@ jobs:
       - name: Build Android fixture
         if: matrix.platform == 'android' && steps.native-build-cache.outputs.cache-hit != 'true'
         working-directory: ${{ env.FIXTURE_DIR }}
-        run: pnpm build:android
+        run: |
+          pnpm build:android -Pandroid.enableMinifyInReleaseBuilds=true -Pandroid.enableShrinkResourcesInReleaseBuilds=true
+          test -s android/app/build/outputs/mapping/release/mapping.txt
 
       # The module's Robolectric tests need an Expo host project for expo-modules-core, so they run in the fixture.
       # The packed module leaves out its tests, so they are copied in from the repo.

From 9bd6c1d3f9193d1c30c078d4e5b33d367e5065dc Mon Sep 17 00:00:00 2001
From: Eliot Gevers <eliot.gevers@gmail.com>
Date: Tue, 29 Sep 2026 15:51:34 +0200
Subject: [PATCH 2/2] fix(expo): supply narrow R8 rule for release fixtures

---
 .changeset/quiet-expo-release-check.md   | 3 +++
 packages/expo/android/build.gradle       | 1 +
 packages/expo/android/proguard-rules.pro | 1 +
 3 files changed, 5 insertions(+)
 create mode 100644 packages/expo/android/proguard-rules.pro

diff --git a/.changeset/quiet-expo-release-check.md b/.changeset/quiet-expo-release-check.md
index a845151cc84..04d678e7310 100644
--- a/.changeset/quiet-expo-release-check.md
+++ b/.changeset/quiet-expo-release-check.md
@@ -1,2 +1,5 @@
 ---
+'@clerk/expo': patch
 ---
+
+Prevent Android release builds with R8 from failing on the missing Kotlin `MustUseReturnValues` annotation.
diff --git a/packages/expo/android/build.gradle b/packages/expo/android/build.gradle
index 0d9564cfb85..91013fc3bbd 100644
--- a/packages/expo/android/build.gradle
+++ b/packages/expo/android/build.gradle
@@ -44,6 +44,7 @@ android {
     versionCode 1
     versionName "1.0.0"
     buildConfigField "String", "CLERK_EXPO_VERSION", "\"${clerkExpoVersion}\""
+    consumerProguardFiles "proguard-rules.pro"
   }
 
   buildTypes {
diff --git a/packages/expo/android/proguard-rules.pro b/packages/expo/android/proguard-rules.pro
new file mode 100644
index 00000000000..c86ea894ce2
--- /dev/null
+++ b/packages/expo/android/proguard-rules.pro
@@ -0,0 +1 @@
+-dontwarn kotlin.MustUseReturnValues