diff --git a/autoload/vital/_brightest/Coaster/Window.vim b/autoload/vital/_brightest/Coaster/Window.vim
index e464006..7c670b8 100644
--- a/autoload/vital/_brightest/Coaster/Window.vim
+++ b/autoload/vital/_brightest/Coaster/Window.vim
@@ -3,8 +3,21 @@ let s:save_cpo = &cpo
 set cpo&vim
 
 
+function! s:_vital_loaded(V)
+	let s:V = a:V
+	let s:Buffer = a:V.import("Vim.Buffer")
+endfunction
+
+
+function! s:_vital_depends()
+	return [
+\		"Vim.Buffer",
+\	]
+endfunction
+
+
 function! s:windo(func, args, obj)
-	if len(tabpagebuflist()) <= 1
+	if len(tabpagebuflist()) <= 1 || s:Buffer.is_cmdwin()
 		return call(a:func, a:args, a:obj)
 	endif
 	let pre_winnr = winnr()
diff --git a/autoload/vital/_brightest/Vim/Buffer.vim b/autoload/vital/_brightest/Vim/Buffer.vim
new file mode 100644
index 0000000..ad12c08
--- /dev/null
+++ b/autoload/vital/_brightest/Vim/Buffer.vim
@@ -0,0 +1,96 @@
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! s:_vital_loaded(V) abort
+  let s:V = a:V
+  let s:P = s:V.import('Prelude')
+endfunction
+
+function! s:_vital_depends() abort
+  return ['Prelude']
+endfunction
+
+if exists('*getcmdwintype')
+  function! s:is_cmdwin() abort
+    return getcmdwintype() !=# ''
+  endfunction
+else
+  function! s:is_cmdwin() abort
+    return bufname('%') ==# '[Command Line]'
+  endfunction
+endif
+
+function! s:open(buffer, opener) abort
+  let save_wildignore = &wildignore
+  let &wildignore = ''
+  try
+    if s:P.is_funcref(a:opener)
+      let loaded = !bufloaded(a:buffer)
+      call a:opener(a:buffer)
+    elseif a:buffer is 0 || a:buffer is ''
+      let loaded = 1
+      silent execute a:opener
+      enew
+    else
+      let loaded = !bufloaded(a:buffer)
+      if s:P.is_string(a:buffer)
+        execute a:opener '`=a:buffer`'
+      elseif s:P.is_number(a:buffer)
+        silent execute a:opener
+        execute a:buffer 'buffer'
+      else
+        throw 'vital: Vim.Buffer: Unknown opener type.'
+      endif
+    endif
+  finally
+    let &wildignore = save_wildignore
+  endtry
+  return loaded
+endfunction
+
+function! s:get_selected_text(...) abort
+  echohl WarningMsg
+  echom "[WARN] s:get_selected_text() is deprecated. Use 's:get_last_selected()'."
+  echohl None
+  return call('s:get_last_selected', a:000)
+endfunction
+
+" Get the last selected text in visual mode
+" without using |gv| to avoid |textlock|.
+" NOTE:
+" * This function uses |gv| only when using |CTRL-V|
+"   because |gv| is the only way to get selected text
+"   when using <C-v>$ .
+"   Please see #192 for the details.
+" * If you don't care about |textlock|,
+"   you can use simple version of this function.
+"   https://github.com/vim-jp/vital.vim/commit/39aae80f3839fdbeebd838ff14d87327a6b889a9
+function! s:get_last_selected() abort
+  if visualmode() ==# "\<C-v>"
+    let save = getreg('"', 1)
+    let save_type = getregtype('"')
+    try
+      normal! gv""y
+      return @"
+    finally
+      call setreg('"', save, save_type)
+    endtry
+  else
+    let [begin, end] = [getpos("'<"), getpos("'>")]
+    let lastchar = matchstr(getline(end[1])[end[2]-1 :], '.')
+    if begin[1] ==# end[1]
+      let lines = [getline(begin[1])[begin[2]-1 : end[2]-2]]
+    else
+      let lines = [getline(begin[1])[begin[2]-1 :]]
+      \         + (end[1] - begin[1] <# 2 ? [] : getline(begin[1]+1, end[1]-1))
+      \         + [getline(end[1])[: end[2]-2]]
+    endif
+    return join(lines, "\n") . lastchar . (visualmode() ==# "V" ? "\n" : "")
+  endif
+endfunction
+
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim:set et ts=2 sts=2 sw=2 tw=0:
diff --git a/autoload/vital/brightest.vital b/autoload/vital/brightest.vital
index 3f655ad..cd2dde1 100644
--- a/autoload/vital/brightest.vital
+++ b/autoload/vital/brightest.vital
@@ -6,3 +6,4 @@ Prelude
 Coaster.Buffer
 Coaster.Highlight
 Coaster.Search
+Coaster.Window