The release build type reuses the debug signing config, so a downloaded APK installs over an existing one instead of demanding an uninstall. This never goes to Play, which rejects debug keys anyway, so there is no private key worth safeguarding for years and no way to strand anyone on a version that can no longer be updated. That choice is load-bearing in one direction: a release build is not DEBUGGABLE, so adb shell run-as stops reading app data back out, and there is no in-app restore. A signature change would have cost the drill progress. npm run release stages release/404-Layers-<version>.apk with a checksum and verifies the signature, since an unsigned APK builds fine and only fails at install time, on someone else's phone. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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