Eastwood 0.9.6 + https://github.com/jonase/eastwood/blob/Release-0.9.6/changes.md Featuring a few new linters: :reflection and :boxed-math (the latter disabled by default). :non-dynamic-earmuffs has been re-enabled as well. You can learn about the reflection linter's rationale and advantages https://github.com/jonase/eastwood/tree/Release-0.9.6#reflection. It's quite an improvement over, say, touching dynamic vars globally/repeatedly and then grepping for them. Enjoy!