diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright Daniel YU (c) 2018
+
+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 YU 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 +1,1 @@
+# yam-job
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/src/Yam/Job.hs b/src/Yam/Job.hs
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--- /dev/null
+++ b/src/Yam/Job.hs
@@ -0,0 +1,52 @@
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE FlexibleInstances     #-}
+{-# LANGUAGE OverloadedStrings     #-}
+{-# LANGUAGE TypeSynonymInstances  #-}
+
+module Yam.Job(
+    YamJob(..)
+  , MonadJob(..)
+  , startJob
+  ) where
+
+import           Yam.App
+
+import           System.Cron
+
+data YamJob = YamJob
+  { name :: Text
+  , cron :: Text
+  , func :: AppM IO ()
+  }
+
+class MonadIO m => MonadJob m where
+  yamJobs :: m [(ThreadId, YamJob)]
+  registerJob :: YamJob -> m ()
+  killJobs :: m ()
+
+keyJob :: Text
+keyJob = "Extension.Job"
+
+instance MonadIO m => MonadJob (AppM m) where
+  yamJobs = getExtensionOrDefault [] keyJob
+  killJobs = yamJobs >>= mapM_ go >> setExtension keyJob ([] :: [(ThreadId, YamJob)])
+    where go (tid,job) = do infoLn $ "Stop job " <> name (job :: YamJob) <> "..."
+                            liftIO $ killThread tid
+  registerJob job = do
+    let nm = name (job :: YamJob)
+    infoLn $ "Register job " <> nm <> " with cron '" <> cron job <> "'"
+    context  <- ask
+    [thread] <- liftIO $ execSchedule
+                      $ flip addJob (cron job)
+                      $ do reqId <- randomHex 8
+                           runAppM context $ withLoggerName (reqId <> " job." <> nm)
+                                           $ do infoLn $ "Start job " <> nm
+                                                func job
+                                                infoLn $ "End job " <> nm
+    jobs <- yamJobs
+    setExtension keyJob ((thread,job):jobs)
+
+startJob :: [YamJob] -> (YamContext -> IO YamContext) -> IO ()
+startJob jobs initialize = do
+  context <- defaultContext >>= initialize
+  runAppM context $ mapM_ registerJob jobs
diff --git a/yam-job.cabal b/yam-job.cabal
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--- /dev/null
+++ b/yam-job.cabal
@@ -0,0 +1,25 @@
+name:                yam-job
+version:             0.1.0.0
+description:         Job Module for Yam
+homepage:            https://github.com/leptonyu/yam-job#readme
+license:             BSD3
+license-file:        LICENSE
+author:              Daniel YU
+maintainer:          i@icymint.me
+copyright:           Copyright: (c) 2017 Daniel YU
+category:            Web
+build-type:          Simple
+extra-source-files:  README.md
+cabal-version:       >=1.10
+
+library
+  hs-source-dirs:      src
+  exposed-modules:     Yam.Job
+  build-depends:       base >= 4.7 && < 5
+                     , yam-app
+                     , cron
+  default-language:    Haskell2010
+
+source-repository head
+  type:     git
+  location: https://github.com/leptonyu/yam-job