diff --git a/CHANGELOG b/CHANGELOG
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--- /dev/null
+++ b/CHANGELOG
@@ -0,0 +1,4 @@
+CHANGELOG
+
+1.0
+  - Extracted generic-constraints from Sjoerd Visscher's & Xia Li-yao's one-liner library, as advised by Sjoerd
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright (c)2012, Sjoerd Visscher
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Sjoerd Visscher nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
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+import Distribution.Simple
+main = defaultMain
diff --git a/generic-constraints.cabal b/generic-constraints.cabal
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--- /dev/null
+++ b/generic-constraints.cabal
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+Name:                 generic-constraints
+Version:              1.0.0
+Synopsis:             Constraints via Generic
+Description:          Write short and concise contexts based on generics
+Homepage:             https://github.com/yairchu/generic-constraints
+Bug-reports:          https://github.com/yairchu/generic-constraints/issues
+License:              BSD3
+License-file:         LICENSE
+Author:               Sjoerd Visscher, Xia Li-yao, Yair Chuchem
+Maintainer:           yairchu@gmail.com
+Category:             Generics
+Build-type:           Simple
+Cabal-version:        >= 1.8
+
+Extra-Source-Files:
+  CHANGELOG
+
+Library
+  HS-Source-Dirs:  src
+
+  Exposed-modules:
+    Generics.Constraints
+
+  Build-depends:
+      base          >= 4.9 && < 5
+
+  ghc-options:
+    -Wall
+    -Wnoncanonical-monad-instances
+    -Wcompat
+    -Wincomplete-record-updates
+    -Wincomplete-uni-patterns
+    -Wredundant-constraints
+
+source-repository head
+  type:     git
+  location: git://github.com/yairchu/generic-constraints.git
+
+Test-suite unittests
+  Hs-source-dirs:  test
+  Main-is:         unittests.hs
+
+  Build-depends:
+      base
+    , HUnit
+    , generic-constraints
+
+  Type: exitcode-stdio-1.0
diff --git a/src/Generics/Constraints.hs b/src/Generics/Constraints.hs
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--- /dev/null
+++ b/src/Generics/Constraints.hs
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+{-# LANGUAGE
+    PolyKinds
+  , TypeFamilies
+  , TypeOperators
+  , ConstraintKinds
+  #-}
+module Generics.Constraints (Constraints) where
+
+import Data.Kind (Constraint, Type)
+import GHC.Generics
+
+type family Constraints' (t :: Type -> Type) (c :: Type -> Constraint) :: Constraint
+type instance Constraints' V1 c = ()
+type instance Constraints' U1 c = ()
+type instance Constraints' (f :+: g) c = (Constraints' f c, Constraints' g c)
+type instance Constraints' (f :*: g) c = (Constraints' f c, Constraints' g c)
+type instance Constraints' (f :.: g) c = Constraints' g c
+type instance Constraints' Par1 c = ()
+type instance Constraints' (Rec1 f) c = ()
+type instance Constraints' (K1 i a) c = c a
+type instance Constraints' (M1 i t f) c = Constraints' f c
+
+-- | `Constraints` is a constraint type synonym, containing the constraint
+-- requirements for an instance for `t` of class `c`.
+-- It requires an instance of class `c` for each component of `t`.
+type Constraints t c = Constraints' (Rep t) c
diff --git a/test/unittests.hs b/test/unittests.hs
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--- /dev/null
+++ b/test/unittests.hs
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+{-# LANGUAGE
+    DeriveGeneric
+  , StandaloneDeriving
+  , UndecidableInstances
+#-}
+
+import Generics.Constraints
+import GHC.Generics
+import Test.HUnit
+
+data T a = T (a Int)
+    deriving Generic
+
+deriving instance Constraints (T a) Eq   => Eq   (T a)
+deriving instance Constraints (T a) Ord  => Ord  (T a)
+deriving instance Constraints (T a) Show => Show (T a)
+
+main = runTestTT $ test
+  [ assert (T [5] > T [3])
+  ]