diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..307f9c0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+/.*
+!/.gitignore
+!/.travis.yml
+/bower_components/
+/node_modules/
+/output/
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0684cf5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# purescript-matryoshka
+
+A PureScript port of [Matryoshka](https://github.com/slamdata/matryoshka). Work still in progress.
diff --git a/bower.json b/bower.json
new file mode 100644
index 0000000..2c1f15d
--- /dev/null
+++ b/bower.json
@@ -0,0 +1,22 @@
+{
+  "name": "purescript-matryoshka",
+  "homepage": "https://github.com/slamdata/purescript-matryoshka",
+  "license": "Apache-2.0",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/slamdata/purescript-matryoshka.git"
+  },
+  "ignore": [
+    "**/.*",
+    "bower_components",
+    "node_modules",
+    "output",
+    "bower.json",
+    "package.json"
+  ],
+  "dependencies": {
+    "purescript-fixed-points": "^2.0.0",
+    "purescript-free": "^3.0.1",
+    "purescript-transformers": "^2.0.2"
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..a0eb217
--- /dev/null
+++ b/package.json
@@ -0,0 +1,13 @@
+{
+  "private": true,
+  "scripts": {
+    "clean": "rimraf output && rimraf .pulp-cache",
+    "build": "pulp build -- --censor-lib --strict"
+  },
+  "devDependencies": {
+    "pulp": "^10.0.0",
+    "purescript": "^0.10.3",
+    "purescript-psa": "^0.4.0",
+    "rimraf": "^2.5.4"
+  }
+}
diff --git a/src/Matryoshka/Algebra.purs b/src/Matryoshka/Algebra.purs
new file mode 100644
index 0000000..22deafc
--- /dev/null
+++ b/src/Matryoshka/Algebra.purs
@@ -0,0 +1,29 @@
+{-
+Copyright 2016 SlamData, Inc.
+
+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.
+-}
+
+module Matryoshka.Algebra where
+
+type GAlgebra w f a = f (w a) → a
+
+type GAlgebraM w m f a = f (w a) → m a
+
+type Algebra f a = f a → a
+
+type AlgebraM m f a = f a → m a
+
+type ElgotAlgebra w f a = w (f a) → a
+
+type ElgotAlgebraM w m f a = w (f a) → m a
diff --git a/src/Matryoshka/DistributiveLaw.purs b/src/Matryoshka/DistributiveLaw.purs
new file mode 100644
index 0000000..be6424c
--- /dev/null
+++ b/src/Matryoshka/DistributiveLaw.purs
@@ -0,0 +1,52 @@
+{-
+Copyright 2016 SlamData, Inc.
+
+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.
+-}
+
+module Matryoshka.DistributiveLaw where
+
+import Prelude
+
+import Control.Comonad (class Comonad, extract)
+import Control.Comonad.Trans.Class (lower)
+import Control.Comonad.Env.Trans (EnvT(..), runEnvT)
+import Control.Comonad.Cofree (Cofree, unfoldCofree, tail)
+
+import Data.Tuple (Tuple(..), fst, snd)
+
+import Matryoshka.Algebra (Algebra)
+
+type DistributiveLaw f w = ∀ a. f (w a) → w (f a)
+
+distZygo ∷ ∀ f a. Functor f ⇒ Algebra f a → DistributiveLaw f (Tuple a)
+distZygo g m = Tuple (g (map fst m)) (map snd m)
+
+distZygoT
+  ∷ ∀ f w a
+  . (Functor f, Comonad w)
+  ⇒ Algebra f a
+  → DistributiveLaw f w
+  → DistributiveLaw f (EnvT a w)
+distZygoT g k fe =
+  EnvT $ Tuple (g (fst <<< runEnvT <$> fe)) (k (lower <$> fe))
+
+distHisto ∷ forall f. Functor f ⇒ DistributiveLaw f (Cofree f)
+distHisto = distGHisto id
+
+distGHisto
+  ∷ ∀ f h
+  . (Functor f, Functor h)
+  ⇒ DistributiveLaw f h
+  → DistributiveLaw f (Cofree h)
+distGHisto k x = unfoldCofree x (map extract) (k <<< map tail)
diff --git a/src/Matryoshka/Recursive.purs b/src/Matryoshka/Recursive.purs
new file mode 100644
index 0000000..f52a61f
--- /dev/null
+++ b/src/Matryoshka/Recursive.purs
@@ -0,0 +1,169 @@
+{-
+Copyright 2016 SlamData, Inc.
+
+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.
+-}
+
+module Matryoshka.Recursive where
+
+import Prelude
+
+import Control.Comonad (class Comonad, duplicate, extract)
+import Control.Comonad.Cofree (Cofree)
+import Control.Comonad.Env.Trans (EnvT)
+
+import Data.Functor.Mu (Mu, unroll)
+import Data.Traversable (class Traversable, traverse)
+import Data.Tuple (Tuple(..))
+import Matryoshka.Algebra (Algebra, AlgebraM, ElgotAlgebra, GAlgebra, GAlgebraM)
+import Matryoshka.DistributiveLaw (DistributiveLaw, distGHisto, distHisto, distZygo, distZygoT)
+
+class Functor f ⇐ Recursive t f | t → f where
+  project ∷ t → f t
+
+instance recursiveMu ∷ Functor f ⇒ Recursive (Mu f) f where
+  project = unroll
+
+cata ∷ ∀ f t a. Recursive t f ⇒ Algebra f a → t → a
+cata f = go
+  where
+  go t = f $ map go $ project t
+
+cataM
+  ∷ ∀ f t m a
+  . (Recursive t f, Monad m, Traversable f)
+  ⇒ AlgebraM m f a
+  → t
+  → m a
+cataM f = go
+  where
+  go t = f =<< traverse go (project t)
+
+gcata
+  ∷ ∀ f t w a
+  . (Recursive t f, Comonad w)
+  ⇒ DistributiveLaw f w
+  → GAlgebra w f a
+  → t
+  → a
+gcata k g = g <<< extract <<< go
+  where
+  go t = k $ map (duplicate <<< map g <<< go) (project t)
+
+elgotCata
+  ∷ ∀ f t w a
+  . (Recursive t f, Comonad w)
+  ⇒ DistributiveLaw f w
+  → ElgotAlgebra w f a
+  → t
+  → a
+elgotCata k g = g <<< go
+  where
+  go t = k $ map (map g <<< duplicate <<< go) (project t)
+
+para ∷ ∀ f t a. Recursive t f ⇒ GAlgebra (Tuple t) f a → t → a
+para f = go
+  where
+  go ∷ t → a
+  go t = f (g <$> project t)
+  g ∷ t → Tuple t a
+  g t = Tuple t (go t)
+
+elgotPara ∷ ∀ f t a. Recursive t f ⇒ ElgotAlgebra (Tuple t) f a → t → a
+elgotPara f = go
+  where
+  go t = f (Tuple t (go <$> project t))
+
+paraM
+  ∷ ∀ f t m a
+  . (Recursive t f, Monad m, Traversable f)
+  ⇒ GAlgebraM (Tuple t) m f a
+  → t
+  → m a
+paraM f = go
+  where
+  go t = f =<< traverse (map (Tuple t) <<< go) (project t)
+
+zygo
+  ∷ ∀ f t a b
+  . Recursive t f
+  ⇒ Algebra f b
+  → GAlgebra (Tuple b) f a
+  → t
+  → a
+zygo = gcata <<< distZygo
+
+elgotZygo
+  ∷ ∀ f t a b
+  . Recursive t f
+  ⇒ Algebra f b
+  → ElgotAlgebra (Tuple b) f a
+  → t
+  → a
+elgotZygo = elgotCata <<< distZygo
+
+gzygo
+  ∷ ∀ f t w a b
+  . (Recursive t f, Comonad w)
+  ⇒ Algebra f b
+  → DistributiveLaw f w
+  → GAlgebra (EnvT b w) f a
+  → t
+  → a
+gzygo f w = gcata (distZygoT f w)
+
+gElgotZygo
+  ∷ ∀ f t w a b
+  . (Recursive t f, Comonad w)
+  ⇒ Algebra f b
+  → DistributiveLaw f w
+  → ElgotAlgebra (EnvT b w) f a
+  → t
+  → a
+gElgotZygo f w = elgotCata (distZygoT f w)
+
+mutu
+  ∷ ∀ f t a b
+  . Recursive t f
+  ⇒ GAlgebra (Tuple a) f b
+  → GAlgebra (Tuple b) f a
+  → t
+  → a
+mutu f g = g <<< map go <<< project
+  where
+  go x = Tuple (mutu g f x) (mutu f g x)
+
+histo
+  ∷ ∀ f t a
+  . Recursive t f
+  ⇒ GAlgebra (Cofree f) f a
+  → t
+  → a
+histo = gcata distHisto
+
+elgotHisto
+  ∷ ∀ f t a
+  . Recursive t f
+  ⇒ ElgotAlgebra (Cofree f) f a
+  → t
+  → a
+elgotHisto = elgotCata distHisto
+
+ghisto
+  ∷ ∀ f t h a
+  . (Recursive t f, Functor h)
+  ⇒ DistributiveLaw f h
+  → GAlgebra (Cofree h) f a
+  → t
+  → a
+ghisto g = gcata (distGHisto g)