diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright Author name here (c) 2017
+
+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 Author name here 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/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,4 @@
+# WriteBuffer
+
+Do you have some costly action that's faster if you can do it in bulk?
+`WriteBuffer` is the tool for you!
diff --git a/Setup.hs b/Setup.hs
new file mode 100644
--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/src/WriteBuffer.hs b/src/WriteBuffer.hs
new file mode 100644
--- /dev/null
+++ b/src/WriteBuffer.hs
@@ -0,0 +1,70 @@
+{-# LANGUAGE FlexibleContexts      #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
+{-# LANGUAGE RecordWildCards       #-}
+
+module WriteBuffer
+    ( module WriteBuffer
+    , module X
+    ) where
+
+import           Control.Concurrent.Lifted
+import           Control.Concurrent.STM          as X
+import           Control.Concurrent.STM.TBMQueue as X
+import           Control.Monad.Catch
+import           Control.Monad.Reader
+import           Control.Monad.Trans.Control
+import           Data.ByteString                 (ByteString)
+import           Data.DList
+import           Data.Int
+import           Data.IORef.Lifted
+import           System.Clock
+import           System.IO
+import           System.Timeout
+
+data WriteBufferOpts rec m
+    = WriteBufferOpts
+    { maxBufferSize    :: Int
+    , maxTimeToWait    :: Integer
+    , bufferInputQueue :: TBMQueue rec
+    , onError          :: SomeException -> m ()
+    , saveRecords      :: [rec] -> m ()
+    }
+
+makeBufferOpts :: MonadIO m => TBMQueue rec -> ([rec] -> m ()) -> WriteBufferOpts rec m
+makeBufferOpts bufferInputQueue saveRecords = WriteBufferOpts {..}
+  where
+    maxBufferSize = 1000
+    maxTimeToWait = 5 * 10^9
+    onError = liftIO . print
+
+runWriteBuffer :: (MonadCatch m, MonadBaseControl IO m, MonadIO m) => WriteBufferOpts rec m -> m ThreadId
+runWriteBuffer WriteBufferOpts{..} = fork $ do
+    timeRef <- newIORef =<< liftIO (getTime Monotonic)
+    forever $ loop empty 0 timeRef
+  where
+    loop inputs len timeRef
+        | len >= maxBufferSize = do
+            saveRecords (toList inputs)
+            loop empty 0 timeRef
+        | otherwise = do
+            earlier <- liftIO $ readIORef timeRef
+            now <- liftIO $ getTime Monotonic
+            let diff = diffTimeSpec now earlier
+            if toNanoSecs diff >= maxTimeToWait then do
+                liftIO $ writeIORef timeRef now
+                saveRecords (toList inputs) `catch` onError
+                loop empty 0 timeRef
+            else do
+                mminput <- liftIO
+                    $ timeout (fromIntegral maxTimeToWait `div` 1000)
+                    $ atomically
+                    $ readTBMQueue bufferInputQueue
+                case mminput of
+                    Nothing ->  -- timeout
+                        loop inputs len timeRef
+                    Just minput ->
+                        case minput of
+                            Nothing -> -- closed queue
+                                pure ()
+                            Just input ->
+                                loop (inputs `snoc` input) (len + 1) timeRef
diff --git a/write-buffer-core.cabal b/write-buffer-core.cabal
new file mode 100644
--- /dev/null
+++ b/write-buffer-core.cabal
@@ -0,0 +1,39 @@
+-- This file has been generated from package.yaml by hpack version 0.17.0.
+--
+-- see: https://github.com/sol/hpack
+
+name:           write-buffer-core
+version:        0.1.0.0
+synopsis:       Buffer your writes, transparently
+description:    Core for the write-buffer set of libraries
+category:       Web
+homepage:       https://github.com/parsonsmatt/write-buffer#readme
+author:         Matt Parsons
+maintainer:     parsonsmatt@gmail.com
+copyright:      2017 Matt Parsons
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+cabal-version:  >= 1.10
+
+extra-source-files:
+    README.md
+
+library
+  hs-source-dirs:
+      src
+  build-depends:
+      base >= 4.7 && < 5
+    , mtl
+    , exceptions
+    , stm
+    , stm-chans
+    , bytestring
+    , clock
+    , dlist
+    , lifted-async
+    , lifted-base
+    , monad-control
+  exposed-modules:
+      WriteBuffer
+  default-language: Haskell2010