diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright (c) 2016 Chris Penner
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/rasa-ext-cmd.cabal b/rasa-ext-cmd.cabal
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--- /dev/null
+++ b/rasa-ext-cmd.cabal
@@ -0,0 +1,33 @@
+name:                rasa-ext-cmd
+version:             0.1.0.0
+synopsis:            Rasa Ext for running commands
+description:         Rasa Ext for running commands
+homepage:            https://github.com/ChrisPenner/rasa/
+license:             MIT
+license-file:        LICENSE
+author:              Chris Penner
+maintainer:          christopher.penner@gmail.com
+copyright:           2016 Chris Penner
+category:            Extension
+build-type:          Simple
+-- extra-source-files:
+cabal-version:       >=1.10
+
+library
+  hs-source-dirs:      src
+  exposed-modules:
+                       Rasa.Ext.Cmd
+
+  build-depends:       base >= 4.7 && < 5
+                     , rasa
+                     , data-default
+                     , lens
+                     , text
+                     , containers
+  default-language:    Haskell2010
+
+  ghc-options:         -Wall
+
+source-repository head
+  type:     git
+  location: https://github.com/ChrisPenner/rasa
diff --git a/src/Rasa/Ext/Cmd.hs b/src/Rasa/Ext/Cmd.hs
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--- /dev/null
+++ b/src/Rasa/Ext/Cmd.hs
@@ -0,0 +1,40 @@
+{-# LANGUAGE TemplateHaskell #-}
+
+module Rasa.Ext.Cmd
+  ( addCmd
+  , runCmd
+  ) where
+
+import Rasa.Ext
+
+import Control.Lens
+import Data.Map
+import Data.Default
+import Data.Typeable
+import qualified Data.Text as T
+
+data Cmd = Cmd
+  { _commands :: Map T.Text (T.Text -> Action ())
+  } deriving (Typeable)
+
+instance Show Cmd where
+  show (Cmd cmds) = show (keys cmds)
+
+makeLenses ''Cmd
+
+instance Default Cmd where
+  def = Cmd
+    { _commands=empty
+    }
+
+-- It would be nice to make this a little more generic, but I'm not sure how right now.
+-- TODO try switching to T.Text -> (T.Text -> a) -> Action ()
+addCmd :: T.Text -> (T.Text -> Action ()) -> Action ()
+addCmd alias mkEvent = ext.commands.at alias ?= mkEvent
+
+runCmd :: T.Text -> T.Text -> Action ()
+runCmd alias args = do
+  mCmd <- use (ext.commands.at alias)
+  case mCmd of
+    Just cmd -> cmd args
+    Nothing -> return ()