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<https://github.com/square/retrofit> says:

&gt; If you are using R8 the shrinking and obfuscation rules are included automatically.
&gt; ProGuard users must manually add the options from <https://github.com/square/retrofit/blob/master/retrofit/src/main/resources/META-INF/proguard/retrofit2.pro|retrofit2.pro>. You might also need <https://square.github.io/okhttp/#r8-proguard|rules for OkHttp> and <https://square.github.io/okio/#r8-proguard|Okio> which are dependencies of this library.
<https://square.github.io/retrofit/> says:

&gt; If you are using R8 or ProGuard add the options from <https://github.com/square/retrofit/blob/master/retrofit/src/main/resources/META-INF/proguard/retrofit2.pro|this file>.
&gt; You might also need rules for OkHttp and Okio which are dependencies of this library.
Worth filing a bug on the difference? Also, does anyone know which one is right (im in the middle of enabling R8 for the first time on a huge project)? I'm assuming that using R8 doesn't require the options from the file linked.