diff --git a/ChangeLog.md b/ChangeLog.md
new file mode 100644
--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,5 @@
+# Changelog for fcf-vinyl
+
+## v0.0.1.0
+
+* Export fcf version of `rappend`.
diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright Daniel Firth (c) 2021
+
+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 Daniel Firth 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
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,9 @@
+# fcf-vinyl
+
+Vinyl compatibility with
+[first-class-families](https://hackage.haskell.org/package/first-class-families).
+Exports a version of `rappend` which uses the fcf version of `(++)` rather than
+the version in `Data.Vinyl.TypeLevel`. This makes it easier to prove things via
+the fcf.
+
+If there are more ways to ease compatibility with FCF, they will be added here.
diff --git a/fcf-vinyl.cabal b/fcf-vinyl.cabal
new file mode 100644
--- /dev/null
+++ b/fcf-vinyl.cabal
@@ -0,0 +1,37 @@
+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.34.4.
+--
+-- see: https://github.com/sol/hpack
+
+name:           fcf-vinyl
+version:        0.0.1.0
+synopsis:       Vinyl compatibility with first-class-families
+description:    Vinyl compatibility with first-class-families
+category:       Web
+author:         Daniel Firth
+maintainer:     dan.firth@homotopic.tech
+copyright:      Daniel Firth
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+extra-source-files:
+    README.md
+    ChangeLog.md
+
+source-repository head
+  type: git
+  location: https://gitlab.homotopic.tech/haskell/fcf-vinyl
+
+library
+  exposed-modules:
+      Fcf.Data.Vinyl
+  other-modules:
+      Paths_fcf_vinyl
+  hs-source-dirs:
+      src
+  build-depends:
+      base >=4.7 && <5
+    , first-class-families
+    , vinyl
+  default-language: Haskell2010
diff --git a/src/Fcf/Data/Vinyl.hs b/src/Fcf/Data/Vinyl.hs
new file mode 100644
--- /dev/null
+++ b/src/Fcf/Data/Vinyl.hs
@@ -0,0 +1,16 @@
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE PolyKinds #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE TypeOperators #-}
+
+module Fcf.Data.Vinyl (rappend) where
+
+import qualified Data.Vinyl as V
+import Fcf
+
+rappend ::
+  V.Rec f as ->
+  V.Rec f bs ->
+  V.Rec f (Eval (as ++ bs))
+rappend V.RNil ys = ys
+rappend (x V.:& xs) ys = x V.:& (xs `rappend` ys)