diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright © 2019-2020 47 Degrees. <http://47deg.com>
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/mu-optics.cabal b/mu-optics.cabal
new file mode 100644
--- /dev/null
+++ b/mu-optics.cabal
@@ -0,0 +1,36 @@
+name:          mu-optics
+version:       0.2.0.0
+synopsis:      Optics for @mu-schema@ terms
+description:
+  With @mu-schema@ you can describe schemas using type-level constructs, and derive serializers from those. This package provides convenient access using @optics@.
+
+license:       Apache-2.0
+license-file:  LICENSE
+author:        Alejandro Serrano, Flavio Corpa
+maintainer:    alejandro.serrano@47deg.com
+copyright:     Copyright © 2019-2020 <http://47deg.com 47 Degrees>
+category:      Network
+build-type:    Simple
+cabal-version: >=1.10
+homepage:      https://higherkindness.io/mu-haskell/
+bug-reports:   https://github.com/higherkindness/mu-haskell/issues
+
+source-repository head
+  type:     git
+  location: https://github.com/higherkindness/mu-haskell
+
+library
+  exposed-modules:  Mu.Schema.Optics
+
+  -- other-modules:
+  -- other-extensions:
+  build-depends:
+      base         >=4.12  && <5
+    , containers
+    , mu-schema    >=0.2.0
+    , optics-core
+    , sop-core
+
+  hs-source-dirs:   src
+  default-language: Haskell2010
+  ghc-options:      -Wall
diff --git a/src/Mu/Schema/Optics.hs b/src/Mu/Schema/Optics.hs
new file mode 100644
--- /dev/null
+++ b/src/Mu/Schema/Optics.hs
@@ -0,0 +1,234 @@
+{-# language AllowAmbiguousTypes    #-}
+{-# language DataKinds              #-}
+{-# language FlexibleInstances      #-}
+{-# language FunctionalDependencies #-}
+{-# language GADTs                  #-}
+{-# language LambdaCase             #-}
+{-# language PolyKinds              #-}
+{-# language ScopedTypeVariables    #-}
+{-# language TypeApplications       #-}
+{-# language TypeOperators          #-}
+{-# language UndecidableInstances   #-}
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+{-|
+Description : Optics-based interface for @mu-schema@ terms
+
+This module provides instances of 'LabelOptic' to be
+used in conjunction with the @optics@ package.
+In particular, there are two kind of optics to access
+different parts of a 'Term':
+
+* With @#field@ you obtain the lens (that is, a getter
+  and a setter) for the corresponding field in a record.
+* With @#choice@ you obtain the prism for the
+  desired choice in an enumeration. You can use then
+  'review' to construct a term with the value.
+
+In addition, we provide a utility function 'record' to
+build a record out of the inner values. We intend the
+interface to be very simple, so this function is overloaded
+to take tuples of different size, with as many components
+as values in the schema type.
+-}
+module Mu.Schema.Optics (
+  -- * Build a term
+  record, record1, enum
+, _U0, _Next, _U1, _U2, _U3
+  -- * Re-exported for convenience.
+, module Optics.Core
+) where
+
+import           Data.Functor.Identity
+import           Data.Kind
+import           Data.Map
+import           Data.Proxy
+import           GHC.TypeLits
+import           Optics.Core
+
+import           Mu.Schema
+
+instance {-# OVERLAPS #-}
+         (FieldLabel Identity sch args fieldName r)
+         => LabelOptic fieldName A_Lens
+                       (Term Identity sch ('DRecord name args))
+                       (Term Identity sch ('DRecord name args))
+                       r r where
+  labelOptic = lens (\(TRecord r) -> runIdentity $ fieldLensGet (Proxy @fieldName) r)
+                    (\(TRecord r) x -> TRecord $ fieldLensSet (Proxy @fieldName) r (Identity x))
+
+instance {-# OVERLAPPABLE #-}
+         (FieldLabel w sch args fieldName r, t ~ w r)
+         => LabelOptic fieldName A_Lens
+                       (Term w sch ('DRecord name args))
+                       (Term w sch ('DRecord name args))
+                       t t where
+  labelOptic = lens (\(TRecord r) -> fieldLensGet (Proxy @fieldName) r)
+                    (\(TRecord r) x -> TRecord $ fieldLensSet (Proxy @fieldName) r x)
+
+record :: BuildRecord w sch args r => r -> Term w sch ('DRecord name args)
+record values = TRecord $ buildR values
+
+record1 :: BuildRecord1 w sch arg r => r -> Term w sch ('DRecord name '[arg])
+record1 value = TRecord $ buildR1 value
+
+class BuildRecord1 (w :: Type -> Type)
+                   (sch :: Schema Symbol Symbol)
+                   (arg :: FieldDef Symbol Symbol)
+                   (r :: Type) | w sch arg -> r where
+  buildR1 :: r -> NP (Field w sch) '[arg]
+
+instance {-# OVERLAPPABLE #-} (Functor w, TypeLabel w sch t1 r1)
+         => BuildRecord1 w sch ('FieldDef x1 t1) (w r1) where
+  buildR1 v = Field (typeLensSet <$> v) :* Nil
+
+instance {-# OVERLAPS #-} (TypeLabel Identity sch t1 r1)
+         => BuildRecord1 Identity sch ('FieldDef x1 t1) r1 where
+  buildR1 v = Field (typeLensSet <$> Identity v) :* Nil
+
+class BuildRecord (w :: Type -> Type)
+                  (sch :: Schema Symbol Symbol)
+                  (args :: [FieldDef Symbol Symbol])
+                  (r :: Type) | w sch args -> r where
+  buildR :: r -> NP (Field w sch) args
+
+instance BuildRecord w sch '[] () where
+  buildR _ = Nil
+
+instance {-# OVERLAPPABLE #-} (Functor w, TypeLabel w sch t1 r1, TypeLabel w sch t2 r2)
+         => BuildRecord w sch '[ 'FieldDef x1 t1, 'FieldDef x2 t2 ] (w r1, w r2) where
+  buildR (v1, v2) = Field (typeLensSet <$> v1)
+                  :* Field (typeLensSet <$> v2) :* Nil
+
+instance {-# OVERLAPS #-} (TypeLabel Identity sch t1 r1, TypeLabel Identity sch t2 r2)
+         => BuildRecord Identity sch '[ 'FieldDef x1 t1, 'FieldDef x2 t2 ] (r1, r2) where
+  buildR (v1, v2) = Field (typeLensSet <$> Identity v1)
+                  :* Field (typeLensSet <$> Identity v2) :* Nil
+
+instance {-# OVERLAPPABLE #-} (Functor w, TypeLabel w sch t1 r1, TypeLabel w sch t2 r2, TypeLabel w sch t3 r3)
+         => BuildRecord w sch
+                        '[ 'FieldDef x1 t1, 'FieldDef x2 t2, 'FieldDef x3 t3 ]
+                        (w r1, w r2, w r3) where
+  buildR (v1, v2, v3) = Field (typeLensSet <$> v1)
+                      :* Field (typeLensSet <$> v2)
+                      :* Field (typeLensSet <$> v3) :* Nil
+
+instance {-# OVERLAPS #-} (TypeLabel Identity sch t1 r1, TypeLabel Identity sch t2 r2, TypeLabel Identity sch t3 r3)
+         => BuildRecord Identity sch
+                        '[ 'FieldDef x1 t1, 'FieldDef x2 t2, 'FieldDef x3 t3 ] (r1, r2, r3) where
+  buildR (v1, v2, v3) = Field (typeLensSet <$> Identity v1)
+                      :* Field (typeLensSet <$> Identity v2)
+                      :* Field (typeLensSet <$> Identity v3) :* Nil
+
+class FieldLabel (w :: Type -> Type)
+                 (sch :: Schema Symbol Symbol)
+                 (args :: [FieldDef Symbol Symbol])
+                 (fieldName :: Symbol) (r :: Type)
+                 | w sch args fieldName -> r where
+  fieldLensGet :: Proxy fieldName -> NP (Field w sch) args -> w r
+  fieldLensSet :: Proxy fieldName -> NP (Field w sch) args -> w r -> NP (Field w sch) args
+
+{- Removed due to FunDeps
+instance TypeError ('Text "cannot find field " ':<>: 'ShowType f)
+         => FieldLabel w sch '[] f t where
+  fieldLensGet = error "this should never be run"
+  fieldLensSet = error "this should never be run"
+-}
+instance {-# OVERLAPS #-} (Functor w, TypeLabel w sch t r)
+         => FieldLabel w sch ('FieldDef f t ': rest) f r where
+  fieldLensGet _ (Field x :* _) = typeLensGet <$> x
+  fieldLensSet _ (_ :* r) new = Field (typeLensSet <$> new) :* r
+instance {-# OVERLAPPABLE #-} FieldLabel w sch rest g t
+         => FieldLabel w sch (f ': rest) g t where
+  fieldLensGet p (_ :* r) = fieldLensGet p r
+  fieldLensSet p (x :* r) new = x :* fieldLensSet p r new
+
+class TypeLabel w (sch :: Schema Symbol Symbol) (t :: FieldType Symbol) (r :: Type)
+      | w sch t -> r where
+  typeLensGet :: FieldValue w sch t -> r
+  typeLensSet :: r -> FieldValue w sch t
+
+instance TypeLabel w sch ('TPrimitive t) t where
+  typeLensGet (FPrimitive x) = x
+  typeLensSet = FPrimitive
+
+instance (r ~ (sch :/: t)) => TypeLabel w sch ('TSchematic t) (Term w sch r) where
+  typeLensGet (FSchematic x) = x
+  typeLensSet = FSchematic
+
+instance (TypeLabel w sch o r', r ~ Maybe r')
+         => TypeLabel w sch ('TOption o) r where
+  typeLensGet (FOption x) = typeLensGet <$> x
+  typeLensSet new = FOption (typeLensSet <$> new)
+
+instance (TypeLabel w sch o r', r ~ [r'])
+         => TypeLabel w sch ('TList o) r where
+  typeLensGet (FList x) = typeLensGet <$> x
+  typeLensSet new = FList (typeLensSet <$> new)
+
+instance ( TypeLabel w sch k k', TypeLabel w sch v v'
+         , r ~ Map k' v', Ord k', Ord (FieldValue w sch k) )
+         => TypeLabel w sch ('TMap k v) r where
+  typeLensGet (FMap x) = mapKeys typeLensGet (typeLensGet <$> x)
+  typeLensSet new = FMap (mapKeys typeLensSet (typeLensSet <$> new))
+
+instance (r ~ NS (FieldValue w sch) choices)
+         => TypeLabel w sch ('TUnion choices) r where
+  typeLensGet (FUnion x) = x
+  typeLensSet = FUnion
+
+enum :: forall (choiceName :: Symbol) choices w sch name.
+        EnumLabel choices choiceName
+     => Term w sch ('DEnum name choices)
+enum = TEnum $ enumPrismBuild (Proxy @choiceName)
+
+instance (EnumLabel choices choiceName, r ~ ())
+         => LabelOptic choiceName A_Prism
+                       (Term w sch ('DEnum name choices))
+                       (Term w sch ('DEnum name choices))
+                       r r where
+  labelOptic = prism' (\_ -> TEnum $ enumPrismBuild (Proxy @choiceName))
+                     (\(TEnum r) -> enumPrismMatch (Proxy @choiceName) r)
+
+class EnumLabel (choices :: [ChoiceDef Symbol])
+                (choiceName :: Symbol) where
+  enumPrismBuild :: Proxy choiceName -> NS Proxy choices
+  enumPrismMatch :: Proxy choiceName -> NS Proxy choices -> Maybe ()
+
+instance TypeError ('Text "cannot find choice " ':<>: 'ShowType c)
+         => EnumLabel '[] c where
+  enumPrismBuild = error "this should never be run"
+  enumPrismMatch = error "this should never be run"
+instance {-# OVERLAPS #-} EnumLabel ('ChoiceDef c ': rest) c where
+  enumPrismBuild _ = Z Proxy
+  enumPrismMatch _ (Z _) = Just ()
+  enumPrismMatch _ _     = Nothing
+instance {-# OVERLAPPABLE #-} EnumLabel rest c
+         => EnumLabel (d ': rest) c where
+  enumPrismBuild p = S (enumPrismBuild p)
+  enumPrismMatch _ (Z _) = Nothing
+  enumPrismMatch p (S x) = enumPrismMatch p x
+
+_U0 :: forall w (sch :: Schema') x xs r. TypeLabel w sch x r
+    => Prism' (NS (FieldValue w sch) (x ': xs)) r
+_U0 = prism' (Z . typeLensSet)
+             (\case (Z x) -> Just $ typeLensGet x
+                    (S _) -> Nothing)
+
+_Next :: forall w (sch :: Schema') x xs.
+         Prism' (NS (FieldValue w sch) (x ': xs))
+                (NS (FieldValue w sch) xs)
+_Next = prism' S
+               (\case (Z _) -> Nothing
+                      (S x) -> Just x)
+
+_U1 :: forall w (sch :: Schema') a b xs r. TypeLabel w sch b r
+    => Prism' (NS (FieldValue w sch) (a ': b ': xs)) r
+_U1 = _Next % _U0
+
+_U2 :: forall w (sch :: Schema') a b c xs r. TypeLabel w sch c r
+    => Prism' (NS (FieldValue w sch) (a ': b ': c ': xs)) r
+_U2 = _Next % _U1
+
+_U3 :: forall w (sch :: Schema') a b c d xs r. TypeLabel w sch d r
+    => Prism' (NS (FieldValue w sch) (a ': b ': c ': d ': xs)) r
+_U3 = _Next % _U2