Multiple GitHub Actions Infrastructure Errors Blocking Android APK Builds

My Android project's GitHub Actions workflow has been failing with multiple different errors since August 14, 2026. The same code and workflow succeeded on August 3, 2026. This indicates a GitHub infrastructure change, not a code issue.

Errors Encountered:

Error 1 - Kotlin Compose Compiler Plugin Incompatibility (Aug 14, 13:33)

Code
Plugin androidx.compose.compiler.plugins.kotlin.ComposePluginRegistrar
is incompatible with the current version of the compiler.
Task: :app:compileDebugKotlin FAILED

Error 2 - Missing gradlew Executable (Aug 14, 13:41)

Code
/home/runner/work/_temp/script.sh: line 1: ./gradlew: No such file or directory
Error 3 - Gradle Wrapper Validation Checksum Unknown (Aug 14, 13:40-Present)

Code
✗ Found unknown Gradle Wrapper JAR files:
a5e75118d96b4eac2100876f6af6a5ca5029cd440f87736425350fb4cf308b42 gradle/wrapper/gradle-wrapper.jar
Error: At least one Gradle Wrapper Jar failed validation!
This error persists even with:

cache-disabled: true
GRADLE_OPTS="-Dorg.gradle.wrapper.validateDistributionUrl=false"
Regenerated wrapper with gradle wrapper --gradle-version 8.5
Timeline:

Aug 3, 2026: Run #65 - ✅ SUCCESS (with same code)
Aug 14, 2026: Runs #66-70 - ❌ Multiple different failures
Code unchanged between these dates
Only GitHub runner environment changed
Repository: memoradev/Memora-2 Workflow: .github/workflows/build.yml Actions Used:

gradle/actions/setup-gradle@v4
android-actions/setup-android@v3
Gradle Wrapper Details:

Checksum: a5e75118d96b4eac2100876f6af6a5ca5029cd440f87736425350fb4cf308b42
Version: 8.5
Generated with: gradle wrapper --gradle-version 8.5
What I've Tried:

Updated build.yml with JVM memory optimization
Disabled Gradle cache
Bypassed wrapper validation flags
Regenerated gradle-wrapper.jar multiple times
Removed signing config requirements
Root Cause: These errors only appear on GitHub Actions runners as of Aug 14. Local builds work fine. This indicates:

Kotlin compiler plugin version mismatch in runner environment
Gradle wrapper validation database not updated for legitimate checksums
Runner environment degradation or misconfiguration
Request: Please investigate and fix:

Kotlin Compose compiler plugin compatibility on Aug 14 runners
Gradle wrapper validation database missing legitimate checksums
Runner environment consistency issues between Aug 3 and Aug 14
Post at: https://github.com/gradle/actions/issues

Start with .github/workflows/build.yml and the listed setup-gradle and setup-android actions, then compare the successful Aug 3 run with the failed Aug 14 runs and their runner logs. Done means identifying a narrowly scoped, reproducible failure relevant to gradle/actions and documenting or implementing its fix; the issue provides no repository file or test that defines a change.

Written by the indexing model from the issue text.