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diff --git a/JSON.hs b/JSON.hs
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+module JSON (
+	module Data.Aeson,
+	Generic,
+	sumOptions
+) where
+
+import GHC.Generics (Generic)
+import Data.Aeson
+import qualified Data.Aeson.Types as Aeson
+
+-- | Nicer JSON encoding for sum types.
+sumOptions :: Aeson.Options
+sumOptions = defaultOptions { Aeson.sumEncoding = Aeson.ObjectWithSingleField }