diff --git a/TODO.org b/TODO.org
index 2b8c164..4f7f955 100644
--- a/TODO.org
+++ b/TODO.org
@@ -8,4 +8,5 @@
 ** TODO add startup custom buffer for kuso
 ** TODO add per project configuration support
 ** TODO configure `package-archive-priorities` so package.el install all packages from elpa first
+** TODO add company mode support for flyspell
 * Release
diff --git a/lib/extensions/development/init.el b/lib/extensions/development/init.el
index d9a08c4..f69662e 100644
--- a/lib/extensions/development/init.el
+++ b/lib/extensions/development/init.el
@@ -31,7 +31,27 @@
            (projectile-global-mode)
            (setq projectile-enable-caching t))
 
+  (ability flycheck ()
+           "Check syntax on the fly using flycheck."
+           (add-hook 'after-init-hook 'global-flycheck-mode))
 
+  (ability spell ()
+           "Check spell of any word using ispell."
+           (require 'flyspell)
+           (setq flyspell-issue-message-flg nil))
+
+  (ability diff-highlight
+           "Highlight the diffs based on VCS."
+           (add-hook 'prog-mode-hook 'turn-on-diff-hl-mode)
+           (add-hook 'vc-dir-mode-hook 'turn-on-diff-hl-mode))
+
+  (ability auto-pair
+           "Auto pair stuffs like brackets begin/ends etc."
+           (electric-pair-mode))
+
+  (ability indent-guide
+           "Show indent guides."
+           (indent-guide-global-mode)
+           (set-face-foreground 'indent-guide-face "#bbb")))
 
-)
 (provide 'extensions/development/init)
diff --git a/lib/extensions/editor.el b/lib/extensions/editor.el
index e541e1a..84276c2 100644
--- a/lib/extensions/editor.el
+++ b/lib/extensions/editor.el
@@ -17,4 +17,3 @@
 	   :on-initialize extension/editor-initialize)
 
 (provide 'extensions/editor)
-
diff --git a/lib/fg42/extension.el b/lib/fg42/extension.el
index d2f38da..a74a4ee 100644
--- a/lib/fg42/extension.el
+++ b/lib/fg42/extension.el
@@ -38,6 +38,7 @@ to them.
 
 (defmacro extension (name &rest args)
   "A simple DSL to define new fg42 extension."
+  ;(declare (doc-string 1) (indent 1))
   `(setq ,name (apply 'make-fg42-extension :name ,(symbol-name name) (quote ,args))))
 
 (provide 'fg42/extension)