diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,11 @@
+Copyright Vanessa McHale (c) 2019
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+
+2. 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.
+
+3. Neither the name of the copyright holder nor the names of its 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 HOLDER 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/archive-sig.cabal b/archive-sig.cabal
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--- /dev/null
+++ b/archive-sig.cabal
@@ -0,0 +1,49 @@
+cabal-version: 2.0
+name: archive-sig
+version: 0.1.0.0
+license: BSD3
+license-file: LICENSE
+copyright: Copyright: (c) 2019 Vanessa McHale
+maintainer: vanessa.mchale@iohk.io
+author: Vanessa McHale
+synopsis: Backpack signature for archive libraries
+description:
+    Backpack signature that provide a common interface to the Haskell tar package and the Haskell libarchive bindings
+category: Codec, Tar, Archive
+build-type: Simple
+
+source-repository head
+    type: git
+    location: https://github.com/vmchale/archive-backpack
+
+flag development
+    description:
+        Enable `-Werror`
+    default: False
+    manual: True
+
+library
+    exposed-modules:
+        Archive.Generic
+    signatures: Archive
+    hs-source-dirs: src
+    default-language: Haskell2010
+    ghc-options: -Wall
+    build-depends:
+        base >=4.3 && <5,
+        bytestring -any,
+        directory -any,
+        dlist -any,
+        bytestring -any,
+        composition-prelude >=2.0.3.0,
+        filepath -any
+
+    if flag(development)
+        ghc-options: -Werror
+
+    if impl(ghc >=8.0)
+        ghc-options: -Wincomplete-uni-patterns -Wincomplete-record-updates
+                     -Wredundant-constraints -Widentities
+
+    if impl(ghc >=8.4)
+        ghc-options: -Wmissing-export-lists
diff --git a/src/Archive.hsig b/src/Archive.hsig
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--- /dev/null
+++ b/src/Archive.hsig
@@ -0,0 +1,26 @@
+signature Archive ( Entry
+                  , Error
+                  , unpackToDir
+                  , readArchiveBytes
+                  , packFromFiles
+                  , writeArchiveBytes
+                  -- , mkEntry
+                  ) where
+
+import qualified Data.ByteString.Lazy as BSL
+
+data Entry
+
+data Error
+
+instance Show Error
+
+packFromFiles :: FilePath -- ^ Path of @.tar@ file to write
+              -> [FilePath] -- ^ Files and directories to archive
+              -> IO ()
+
+unpackToDir :: FilePath -> BSL.ByteString -> IO ()
+
+readArchiveBytes :: BSL.ByteString -> Either Error [Entry]
+
+writeArchiveBytes :: [Entry] -> BSL.ByteString
diff --git a/src/Archive/Generic.hs b/src/Archive/Generic.hs
new file mode 100644
--- /dev/null
+++ b/src/Archive/Generic.hs
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+module Archive.Generic ( packFromDir
+                       , unpackFileToDir
+                       , unpackFromFile
+                       , packToFile
+                       ) where
+
+import           Archive
+import           Control.Composition  ((.*), (.@))
+import           Control.Monad        (filterM)
+import qualified Data.ByteString.Lazy as BSL
+import           Data.DList           (DList, fromList)
+import           Data.Foldable        (fold, toList)
+import           System.Directory     (doesDirectoryExist, getDirectoryContents)
+import           System.FilePath      ((</>))
+
+packToFile :: FilePath -> [Entry] -> IO ()
+packToFile = writeArchiveBytes .@ BSL.writeFile
+
+unpackFromFile :: FilePath -> IO [Entry]
+unpackFromFile = fmap (either (error . show) id . readArchiveBytes) . BSL.readFile
+
+unpackFileToDir :: FilePath -- ^ Filepath pointing to archive
+                -> FilePath -- ^ Directory
+                -> IO ()
+unpackFileToDir tar dir = unpackToDir dir =<< BSL.readFile tar
+
+packFromDir :: FilePath -- ^ Directory to be packed up
+            -> FilePath -- ^ @.tar@ archive file
+            -> IO ()
+packFromDir dir tar = packFromFiles tar =<< fmap toList (getDirRecursive dir)
+
+getDirRecursive :: FilePath -> IO (DList FilePath)
+getDirRecursive fp = do
+    all' <- exclude <$> getDirectoryContents fp
+    dirs <- exclude <$> filterM doesDirectoryExist (mkRel <$> all')
+    case dirs of
+        [] -> pure $ fromList (mkRel <$> all')
+        ds -> do
+            next <- foldMapA getDirRecursive ds
+            pure $ next <> fromList (mkRel <$> all')
+
+    where foldMapA = fmap fold .* traverse
+          exclude = filter (\x -> x /= "." && x /= "..")
+          mkRel = (fp </>)