diff --git a/coauthors.sh b/coauthors.sh
index 7a45363..a22f3b1 100755
--- a/coauthors.sh
+++ b/coauthors.sh
@@ -9,4 +9,37 @@ cat <<-EOF > ~/.git-coauthors
   }
 }
 EOF
-git mob sig 
\ No newline at end of file
+git mob sig 
+cat <<-EOF > ./git/hooks/prepare-commit-msg
+#!/usr/bin/env node
+let exec = require('child_process').exec,
+    fs = require('fs');
+
+const commitMessage = process.argv[2];
+// expect .git/COMMIT_EDITMSG
+if(/COMMIT_EDITMSG/g.test(commitMessage)){
+    let contents = "";
+    exec("git mob-print",
+      function (err, stdout) {
+        if(err) {
+            process.exit(0);
+        }
+
+        // opens .git/COMMIT_EDITMSG
+        contents = fs.readFileSync(commitMessage);
+
+        if(contents.indexOf(stdout.trim()) !== -1) {
+            process.exit(0);
+        }
+
+        const commentPos = contents.indexOf('# ');
+        const gitMessage = contents.slice(0, commentPos);
+        const gitComments = contents.slice(commentPos)
+
+        fs.writeFileSync(commitMessage, gitMessage + stdout + gitComments);
+        process.exit(0);
+    });
+}
+EOF
+chmod +x ./git/hooks/prepare-commit-msg
+echo "Environment is setup!"
\ No newline at end of file