diff --git a/autoload/neosnippet/commands.vim b/autoload/neosnippet/commands.vim
index 001f17e..0644f05 100644
--- a/autoload/neosnippet/commands.vim
+++ b/autoload/neosnippet/commands.vim
@@ -31,7 +31,7 @@ let s:edit_options = [
       \ '-runtime',
       \ '-vertical', '-horizontal', '-direction=', '-split',
       \]
-let s:Cache = neosnippet#util#get_vital().import('System.Cache')
+let s:Cache = neosnippet#util#get_vital().import('System.Cache.Deprecated')
 "}}}
 
 function! s:get_list() abort "{{{
diff --git a/autoload/neosnippet/parser.vim b/autoload/neosnippet/parser.vim
index 02db170..31637db 100644
--- a/autoload/neosnippet/parser.vim
+++ b/autoload/neosnippet/parser.vim
@@ -26,7 +26,7 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-let s:Cache = neosnippet#util#get_vital().import('System.Cache')
+let s:Cache = neosnippet#util#get_vital().import('System.Cache.Deprecated')
 
 function! neosnippet#parser#_parse_snippets(filename) abort "{{{
   if !filereadable(a:filename)
diff --git a/autoload/neosnippet/util.vim b/autoload/neosnippet/util.vim
index 75696f6..1b45641 100644
--- a/autoload/neosnippet/util.vim
+++ b/autoload/neosnippet/util.vim
@@ -26,7 +26,7 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-let s:V = vital#of('neosnippet')
+let s:V = vital#neosnippet#of()
 function! neosnippet#util#get_vital() abort "{{{
   return s:V
 endfunction"}}}
diff --git a/autoload/vital/_neosnippet.vim b/autoload/vital/_neosnippet.vim
index 2723144..ae19f5b 100644
--- a/autoload/vital/_neosnippet.vim
+++ b/autoload/vital/_neosnippet.vim
@@ -1,303 +1,5 @@
-let s:self_version = expand('<sfile>:t:r')
-let s:self_file = expand('<sfile>')
+let s:_plugin_name = expand('<sfile>:t:r')
 
-" Note: The extra argument to globpath() was added in Patch 7.2.051.
-let s:globpath_third_arg = v:version > 702 || v:version == 702 && has('patch51')
-
-let s:loaded = {}
-
-function! s:import(name, ...) abort
-  let target = {}
-  let functions = []
-  for a in a:000
-    if type(a) == type({})
-      let target = a
-    elseif type(a) == type([])
-      let functions = a
-    endif
-    unlet a
-  endfor
-  let module = s:_import(a:name)
-  if empty(functions)
-    call extend(target, module, 'keep')
-  else
-    for f in functions
-      if has_key(module, f) && !has_key(target, f)
-        let target[f] = module[f]
-      endif
-    endfor
-  endif
-  return target
-endfunction
-
-function! s:load(...) dict abort
-  for arg in a:000
-    let [name; as] = type(arg) == type([]) ? arg[: 1] : [arg, arg]
-    let target = split(join(as, ''), '\W\+')
-    let dict = self
-    while 1 <= len(target)
-      let ns = remove(target, 0)
-      if !has_key(dict, ns)
-        let dict[ns] = {}
-      endif
-      if type(dict[ns]) == type({})
-        let dict = dict[ns]
-      else
-        unlet dict
-        break
-      endif
-    endwhile
-
-    if exists('dict')
-      call extend(dict, s:_import(name))
-    endif
-    unlet arg
-  endfor
-  return self
-endfunction
-
-function! s:unload() abort
-  let s:loaded = {}
-endfunction
-
-function! s:exists(name) abort
-  return s:_get_module_path(a:name) !=# ''
-endfunction
-
-function! s:search(pattern) abort
-  let paths = s:_vital_files(a:pattern)
-  let modules = sort(map(paths, 's:_file2module(v:val)'))
-  return s:_uniq(modules)
-endfunction
-
-function! s:expand_modules(entry, all) abort
-  if type(a:entry) == type([])
-    let candidates = s:_concat(map(copy(a:entry), 's:search(v:val)'))
-    if empty(candidates)
-      throw printf('vital: Any of module %s is not found', string(a:entry))
-    endif
-    if eval(join(map(copy(candidates), 'has_key(a:all, v:val)'), '+'))
-      let modules = []
-    else
-      let modules = [candidates[0]]
-    endif
-  else
-    let modules = s:search(a:entry)
-    if empty(modules)
-      throw printf('vital: Module %s is not found', a:entry)
-    endif
-  endif
-  call filter(modules, '!has_key(a:all, v:val)')
-  for module in modules
-    let a:all[module] = 1
-  endfor
-  return modules
-endfunction
-
-function! s:_import(name) abort
-  if type(a:name) == type(0)
-    return s:_build_module(a:name)
-  endif
-  let path = s:_get_module_path(a:name)
-  if path ==# ''
-    throw 'vital: module not found: ' . a:name
-  endif
-  let sid = s:_get_sid_by_script(path)
-  if !sid
-    try
-      execute 'source' fnameescape(path)
-    catch /^Vim\%((\a\+)\)\?:E484/
-      throw 'vital: module not found: ' . a:name
-    catch /^Vim\%((\a\+)\)\?:E127/
-      " Ignore.
-    endtry
-
-    let sid = s:_get_sid_by_script(path)
-  endif
-  return s:_build_module(sid)
-endfunction
-
-function! s:_get_module_path(name) abort
-  if s:_is_absolute_path(a:name) && filereadable(a:name)
-    return a:name
-  endif
-  if a:name ==# ''
-    let paths = [s:self_file]
-  elseif a:name =~# '\v^\u\w*%(\.\u\w*)*$'
-    let paths = s:_vital_files(a:name)
-  else
-    throw 'vital: Invalid module name: ' . a:name
-  endif
-
-  call filter(paths, 'filereadable(expand(v:val, 1))')
-  let path = get(paths, 0, '')
-  return path !=# '' ? path : ''
-endfunction
-
-function! s:_get_sid_by_script(path) abort
-  let path = s:_unify_path(a:path)
-  for line in filter(split(s:_redir('scriptnames'), "\n"),
-  \                  'stridx(v:val, s:self_version) > 0')
-    let list = matchlist(line, '^\s*\(\d\+\):\s\+\(.\+\)\s*$')
-    if !empty(list) && s:_unify_path(list[2]) ==# path
-      return list[1] - 0
-    endif
-  endfor
-  return 0
-endfunction
-
-function! s:_file2module(file) abort
-  let filename = fnamemodify(a:file, ':p:gs?[\\/]?/?')
-  let tail = matchstr(filename, 'autoload/vital/_\w\+/\zs.*\ze\.vim$')
-  return join(split(tail, '[\\/]\+'), '.')
-endfunction
-
-if filereadable(expand('<sfile>:r') . '.VIM')
-  " resolve() is slow, so we cache results.
-  let s:_unify_path_cache = {}
-  " Note: On windows, vim can't expand path names from 8.3 formats.
-  " So if getting full path via <sfile> and $HOME was set as 8.3 format,
-  " vital load duplicated scripts. Below's :~ avoid this issue.
-  function! s:_unify_path(path) abort
-    if has_key(s:_unify_path_cache, a:path)
-      return s:_unify_path_cache[a:path]
-    endif
-    let value = tolower(fnamemodify(resolve(fnamemodify(
-    \                   a:path, ':p')), ':~:gs?[\\/]?/?'))
-    let s:_unify_path_cache[a:path] = value
-    return value
-  endfunction
-else
-  function! s:_unify_path(path) abort
-    return resolve(fnamemodify(a:path, ':p:gs?[\\/]?/?'))
-  endfunction
-endif
-
-if s:globpath_third_arg
-  function! s:_runtime_files(path) abort
-    return split(globpath(&runtimepath, a:path, 1), "\n")
-  endfunction
-else
-  function! s:_runtime_files(path) abort
-    return split(globpath(&runtimepath, a:path), "\n")
-  endfunction
-endif
-
-let s:_vital_files_cache_runtimepath = ''
-let s:_vital_files_cache = []
-function! s:_vital_files(pattern) abort
-  if s:_vital_files_cache_runtimepath !=# &runtimepath
-    let path = printf('autoload/vital/%s/**/*.vim', s:self_version)
-    let s:_vital_files_cache = s:_runtime_files(path)
-    let mod = ':p:gs?[\\/]\+?/?'
-    call map(s:_vital_files_cache, 'fnamemodify(v:val, mod)')
-    let s:_vital_files_cache_runtimepath = &runtimepath
-  endif
-  let target = substitute(a:pattern, '\.', '/', 'g')
-  let target = substitute(target, '\*', '[^/]*', 'g')
-  let regexp = printf('autoload/vital/%s/%s.vim', s:self_version, target)
-  return filter(copy(s:_vital_files_cache), 'v:val =~# regexp')
-endfunction
-
-" Copy from System.Filepath
-if has('win16') || has('win32') || has('win64')
-  function! s:_is_absolute_path(path) abort
-    return a:path =~? '^[a-z]:[/\\]'
-  endfunction
-else
-  function! s:_is_absolute_path(path) abort
-    return a:path[0] ==# '/'
-  endfunction
-endif
-
-function! s:_build_module(sid) abort
-  if has_key(s:loaded, a:sid)
-    return copy(s:loaded[a:sid])
-  endif
-  let functions = s:_get_functions(a:sid)
-
-  let prefix = '<SNR>' . a:sid . '_'
-  let module = {}
-  for func in functions
-    let module[func] = function(prefix . func)
-  endfor
-  if has_key(module, '_vital_loaded')
-    let V = vital#{s:self_version}#new()
-    if has_key(module, '_vital_depends')
-      let all = {}
-      let modules =
-      \     s:_concat(map(module._vital_depends(),
-      \                   's:expand_modules(v:val, all)'))
-      call call(V.load, modules, V)
-    endif
-    try
-      call module._vital_loaded(V)
-    catch
-      " FIXME: Show an error message for debug.
-    endtry
-  endif
-  if !get(g:, 'vital_debug', 0)
-    call filter(module, 'v:key =~# "^\\a"')
-  endif
-  let s:loaded[a:sid] = module
-  return copy(module)
-endfunction
-
-if exists('+regexpengine')
-  function! s:_get_functions(sid) abort
-    let funcs = s:_redir(printf("function /\\%%#=2^\<SNR>%d_", a:sid))
-    let map_pat = '<SNR>' . a:sid . '_\zs\w\+'
-    return map(split(funcs, "\n"), 'matchstr(v:val, map_pat)')
-  endfunction
-else
-  function! s:_get_functions(sid) abort
-    let prefix = '<SNR>' . a:sid . '_'
-    let funcs = s:_redir('function')
-    let filter_pat = '^\s*function ' . prefix
-    let map_pat = prefix . '\zs\w\+'
-    return map(filter(split(funcs, "\n"),
-    \          'stridx(v:val, prefix) > 0 && v:val =~# filter_pat'),
-    \          'matchstr(v:val, map_pat)')
-  endfunction
-endif
-
-if exists('*uniq')
-  function! s:_uniq(list) abort
-    return uniq(a:list)
-  endfunction
-else
-  function! s:_uniq(list) abort
-    let i = len(a:list) - 1
-    while 0 < i
-      if a:list[i] ==# a:list[i - 1]
-        call remove(a:list, i)
-        let i -= 2
-      else
-        let i -= 1
-      endif
-    endwhile
-    return a:list
-  endfunction
-endif
-
-function! s:_concat(lists) abort
-  let result_list = []
-  for list in a:lists
-    let result_list += list
-  endfor
-  return result_list
-endfunction
-
-function! s:_redir(cmd) abort
-  let [save_verbose, save_verbosefile] = [&verbose, &verbosefile]
-  set verbose=0 verbosefile=
-  redir => res
-    silent! execute a:cmd
-  redir END
-  let [&verbose, &verbosefile] = [save_verbose, save_verbosefile]
-  return res
-endfunction
-
-function! vital#{s:self_version}#new() abort
-  return s:_import('')
+function! vital#{s:_plugin_name}#new() abort
+  return vital#{s:_plugin_name[1:]}#of()
 endfunction
diff --git a/autoload/vital/_neosnippet/Data/List.vim b/autoload/vital/_neosnippet/Data/List.vim
index c8aac65..d779275 100644
--- a/autoload/vital/_neosnippet/Data/List.vim
+++ b/autoload/vital/_neosnippet/Data/List.vim
@@ -1,3 +1,18 @@
+" ___vital___
+" NOTE: lines between '" ___vital___' is generated by :Vitalize.
+" Do not mofidify the code nor insert new lines before '" ___vital___'
+if v:version > 703 || v:version == 703 && has('patch1170')
+  function! vital#_neosnippet#Data#List#import() abort
+    return map({'combinations': '', 'and': '', 'sort_by': '', 'foldr1': '', 'sort': '', 'flatten': '', 'has_index': '', 'find_indices': '', 'any': '', 'unshift': '', 'span': '', 'pop': '', 'binary_search': '', 'uniq_by': '', 'or': '', 'all': '', 'zip': '', 'find_last_index': '', 'find': '', 'partition': '', 'map_accum': '', 'permutations': '', 'break': '', 'max_by': '', 'foldl': '', 'foldr': '', 'find_index': '', 'group_by': '', 'take_while': '', 'conj': '', 'push': '', 'char_range': '', 'cons': '', 'foldl1': '', 'intersect': '', 'concat': '', 'shift': '', 'clear': '', 'has_common_items': '', 'product': '', 'zip_fill': '', 'uniq': '', 'has': '', 'min_by': '', 'with_index': ''},  'function("s:" . v:key)')
+  endfunction
+else
+  function! s:_SID() abort
+    return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
+  endfunction
+  execute join(['function! vital#_neosnippet#Data#List#import() abort', printf("return map({'combinations': '', 'and': '', 'sort_by': '', 'foldr1': '', 'sort': '', 'flatten': '', 'has_index': '', 'find_indices': '', 'any': '', 'unshift': '', 'span': '', 'pop': '', 'binary_search': '', 'uniq_by': '', 'or': '', 'all': '', 'zip': '', 'find_last_index': '', 'find': '', 'partition': '', 'map_accum': '', 'permutations': '', 'break': '', 'max_by': '', 'foldl': '', 'foldr': '', 'find_index': '', 'group_by': '', 'take_while': '', 'conj': '', 'push': '', 'char_range': '', 'cons': '', 'foldl1': '', 'intersect': '', 'concat': '', 'shift': '', 'clear': '', 'has_common_items': '', 'product': '', 'zip_fill': '', 'uniq': '', 'has': '', 'min_by': '', 'with_index': ''}, \"function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
+  delfunction s:_SID
+endif
+" ___vital___
 " Utilities for list.
 
 let s:save_cpo = &cpo
@@ -225,7 +240,7 @@ endfunction
 " similar to Haskell's Prelude.foldl1
 function! s:foldl1(f, xs) abort
   if len(a:xs) == 0
-    throw 'foldl1'
+    throw 'vital: Data.List: foldl1'
   endif
   return s:foldl(a:f, a:xs[0], a:xs[1:])
 endfunction
@@ -238,7 +253,7 @@ endfunction
 " similar to Haskell's Prelude.fold11
 function! s:foldr1(f, xs) abort
   if len(a:xs) == 0
-    throw 'foldr1'
+    throw 'vital: Data.List: foldr1'
   endif
   return s:foldr(a:f, a:xs[-1], a:xs[0:-2])
 endfunction
@@ -264,7 +279,7 @@ endfunction
 " Inspired by Ruby's with_index method.
 function! s:with_index(list, ...) abort
   let base = a:0 > 0 ? a:1 : 0
-  return s:zip(a:list, range(base, len(a:list)+base-1))
+  return map(copy(a:list), '[v:val, v:key + base]')
 endfunction
 
 " similar to Ruby's detect or Haskell's find.
diff --git a/autoload/vital/_neosnippet/Data/String.vim b/autoload/vital/_neosnippet/Data/String.vim
index a29cc8d..2824472 100644
--- a/autoload/vital/_neosnippet/Data/String.vim
+++ b/autoload/vital/_neosnippet/Data/String.vim
@@ -1,3 +1,18 @@
+" ___vital___
+" NOTE: lines between '" ___vital___' is generated by :Vitalize.
+" Do not mofidify the code nor insert new lines before '" ___vital___'
+if v:version > 703 || v:version == 703 && has('patch1170')
+  function! vital#_neosnippet#Data#String#import() abort
+    return map({'trim': '', 'chomp': '', 'starts_with': '', 'truncate_skipping': '', 'pad_left': '', 'hash': '', 'trim_end': '', 'nr2enc_char': '', '_vital_depends': '', 'wrap': '', 'split3': '', 'strwidthpart_reverse': '', 'pad_both_sides': '', 'chop': '', 'lines': '', 'contains_multibyte': '', 'nr2byte': '', 'dstring': '', 'replace': '', 'scan': '', 'diffidx': '', 'strchars': '', 'pad_between_letters': '', 'ends_with': '', 'nsplit': '', 'justify_equal_spacing': '', 'strwidthpart': '', 'split_leftright': '', 'truncate': '', 'substitute_last': '', 'pad_right': '', 'replace_first': '', 'split_by_displaywidth': '', 'wcswidth': '', 'common_head': '', 'levenshtein_distance': '', 'reverse': '', 'trim_start': '', 'nr2hex': '', 'padding_by_displaywidth': '', '_vital_loaded': ''},  'function("s:" . v:key)')
+  endfunction
+else
+  function! s:_SID() abort
+    return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
+  endfunction
+  execute join(['function! vital#_neosnippet#Data#String#import() abort', printf("return map({'trim': '', 'chomp': '', 'starts_with': '', 'truncate_skipping': '', 'pad_left': '', 'hash': '', 'trim_end': '', 'nr2enc_char': '', '_vital_depends': '', 'wrap': '', 'split3': '', 'strwidthpart_reverse': '', 'pad_both_sides': '', 'chop': '', 'lines': '', 'contains_multibyte': '', 'nr2byte': '', 'dstring': '', 'replace': '', 'scan': '', 'diffidx': '', 'strchars': '', 'pad_between_letters': '', 'ends_with': '', 'nsplit': '', 'justify_equal_spacing': '', 'strwidthpart': '', 'split_leftright': '', 'truncate': '', 'substitute_last': '', 'pad_right': '', 'replace_first': '', 'split_by_displaywidth': '', 'wcswidth': '', 'common_head': '', 'levenshtein_distance': '', 'reverse': '', 'trim_start': '', 'nr2hex': '', 'padding_by_displaywidth': '', '_vital_loaded': ''}, \"function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
+  delfunction s:_SID
+endif
+" ___vital___
 " Utilities for string.
 
 let s:save_cpo = &cpo
@@ -40,6 +55,15 @@ function! s:reverse(str) abort
   return join(reverse(split(a:str, '.\zs')), '')
 endfunction
 
+function! s:starts_with(str, prefix) abort
+  return stridx(a:str, a:prefix) == 0
+endfunction
+
+function! s:ends_with(str, suffix) abort
+  let idx = strridx(a:str, a:suffix)
+  return 0 <= idx && idx + len(a:suffix) == len(a:str)
+endfunction
+
 function! s:common_head(strs) abort
   if empty(a:strs)
     return ''
@@ -50,7 +74,7 @@ function! s:common_head(strs) abort
   endif
   let strs = len == 2 ? a:strs : sort(copy(a:strs))
   let pat = substitute(strs[0], '.', '\="[" . escape(submatch(0), "^\\") . "]"', 'g')
-  return pat == '' ? '' : matchstr(strs[-1], '\C^\%[' . pat . ']')
+  return pat ==# '' ? '' : matchstr(strs[-1], '\C^\%[' . pat . ']')
 endfunction
 
 " Split to two elements of List. ([left, right])
@@ -154,15 +178,15 @@ endfunction "}}}
 " NOTE _concat() is just a copy of Data.List.concat().
 " FIXME don't repeat yourself
 function! s:_split_by_wcswidth_once(body, x) abort
-  let fst = s:P.strwidthpart(a:body, a:x)
-  let snd = s:P.strwidthpart_reverse(a:body, s:P.wcswidth(a:body) - s:P.wcswidth(fst))
+  let fst = s:strwidthpart(a:body, a:x)
+  let snd = s:strwidthpart_reverse(a:body, s:wcswidth(a:body) - s:wcswidth(fst))
   return [fst, snd]
 endfunction
 
 function! s:_split_by_wcswidth(body, x) abort
   let memo = []
   let body = a:body
-  while s:P.wcswidth(body) > a:x
+  while s:wcswidth(body) > a:x
     let [tmp, body] = s:_split_by_wcswidth_once(body, a:x)
     call add(memo, tmp)
   endwhile
@@ -174,6 +198,14 @@ function! s:trim(str) abort
   return matchstr(a:str,'^\s*\zs.\{-}\ze\s*$')
 endfunction
 
+function! s:trim_start(str) abort
+  return matchstr(a:str,'^\s*\zs.\{-}$')
+endfunction
+
+function! s:trim_end(str) abort
+  return matchstr(a:str,'^.\{-}\ze\s*$')
+endfunction
+
 function! s:wrap(str,...) abort
   let _columns = a:0 > 0 ? a:1 : &columns
   return s:L.concat(
@@ -191,7 +223,7 @@ function! s:nr2byte(nr) abort
 endfunction
 
 function! s:nr2enc_char(charcode) abort
-  if &encoding == 'utf-8'
+  if &encoding ==# 'utf-8'
     return nr2char(a:charcode)
   endif
   let char = s:nr2byte(a:charcode)
@@ -203,7 +235,7 @@ endfunction
 
 function! s:nr2hex(nr) abort
   let n = a:nr
-  let r = ""
+  let r = ''
   while n
     let r = '0123456789ABCDEF'[n % 16] . r
     let n = n / 16
@@ -354,7 +386,7 @@ function! s:split_by_displaywidth(expr, width, float, is_wrap) abort
 
   let text = ''
   while cs_index < len(cs)
-    if cs[cs_index] is "\n"
+    if cs[cs_index] is# "\n"
       let text = s:padding_by_displaywidth(text, a:width, a:float)
       let lines += [text]
       let text = ''
@@ -375,7 +407,7 @@ function! s:split_by_displaywidth(expr, width, float, is_wrap) abort
         if a:is_wrap
           if a:width < w
             if a:width < strdisplaywidth(cs[cs_index])
-              while get(cs, cs_index, "\n") isnot "\n"
+              while get(cs, cs_index, "\n") isnot# "\n"
                 let cs_index += 1
               endwhile
               continue
@@ -384,7 +416,7 @@ function! s:split_by_displaywidth(expr, width, float, is_wrap) abort
             endif
           endif
         else
-          while get(cs, cs_index, "\n") isnot "\n"
+          while get(cs, cs_index, "\n") isnot# "\n"
             let cs_index += 1
           endwhile
           continue
diff --git a/autoload/vital/_neosnippet/Prelude.vim b/autoload/vital/_neosnippet/Prelude.vim
index 0511de7..ed80ed7 100644
--- a/autoload/vital/_neosnippet/Prelude.vim
+++ b/autoload/vital/_neosnippet/Prelude.vim
@@ -1,3 +1,18 @@
+" ___vital___
+" NOTE: lines between '" ___vital___' is generated by :Vitalize.
+" Do not mofidify the code nor insert new lines before '" ___vital___'
+if v:version > 703 || v:version == 703 && has('patch1170')
+  function! vital#_neosnippet#Prelude#import() abort
+    return map({'escape_pattern': '', 'is_funcref': '', 'path2directory': '', 'wcswidth': '', 'is_string': '', 'input_helper': '', 'is_number': '', 'is_cygwin': '', 'path2project_directory': '', 'strwidthpart_reverse': '', 'input_safe': '', 'is_list': '', 'truncate_skipping': '', 'glob': '', 'truncate': '', 'is_dict': '', 'set_default': '', 'is_numeric': '', 'getchar_safe': '', 'substitute_path_separator': '', 'is_mac': '', 'strwidthpart': '', 'getchar': '', 'is_unix': '', 'is_windows': '', 'globpath': '', 'escape_file_searching': '', 'is_float': '', 'smart_execute_command': ''},  'function("s:" . v:key)')
+  endfunction
+else
+  function! s:_SID() abort
+    return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
+  endfunction
+  execute join(['function! vital#_neosnippet#Prelude#import() abort', printf("return map({'escape_pattern': '', 'is_funcref': '', 'path2directory': '', 'wcswidth': '', 'is_string': '', 'input_helper': '', 'is_number': '', 'is_cygwin': '', 'path2project_directory': '', 'strwidthpart_reverse': '', 'input_safe': '', 'is_list': '', 'truncate_skipping': '', 'glob': '', 'truncate': '', 'is_dict': '', 'set_default': '', 'is_numeric': '', 'getchar_safe': '', 'substitute_path_separator': '', 'is_mac': '', 'strwidthpart': '', 'getchar': '', 'is_unix': '', 'is_windows': '', 'globpath': '', 'escape_file_searching': '', 'is_float': '', 'smart_execute_command': ''}, \"function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
+  delfunction s:_SID
+endif
+" ___vital___
 let s:save_cpo = &cpo
 set cpo&vim
 
@@ -27,7 +42,7 @@ let [
 \   s:__TYPE_DICT,
 \   s:__TYPE_FLOAT] = [
       \   type(3),
-      \   type(""),
+      \   type(''),
       \   type(function('tr')),
       \   type([]),
       \   type({}),
@@ -69,7 +84,7 @@ function! s:is_dict(Value) abort
 endfunction
 
 function! s:truncate_skipping(str, max, footer_width, separator) abort
-  call s:_warn_deprecated("truncate_skipping", "Data.String.truncate_skipping")
+  call s:_warn_deprecated('truncate_skipping', 'Data.String.truncate_skipping')
 
   let width = s:wcswidth(a:str)
   if width <= a:max
@@ -87,7 +102,7 @@ function! s:truncate(str, width) abort
   " Original function is from mattn.
   " http://github.com/mattn/googlereader-vim/tree/master
 
-  call s:_warn_deprecated("truncate", "Data.String.truncate")
+  call s:_warn_deprecated('truncate', 'Data.String.truncate')
 
   if a:str =~# '^[\x00-\x7f]*$'
     return len(a:str) < a:width ?
@@ -109,7 +124,7 @@ function! s:truncate(str, width) abort
 endfunction
 
 function! s:strwidthpart(str, width) abort
-  call s:_warn_deprecated("strwidthpart", "Data.String.strwidthpart")
+  call s:_warn_deprecated('strwidthpart', 'Data.String.strwidthpart')
 
   if a:width <= 0
     return ''
@@ -125,7 +140,7 @@ function! s:strwidthpart(str, width) abort
   return ret
 endfunction
 function! s:strwidthpart_reverse(str, width) abort
-  call s:_warn_deprecated("strwidthpart_reverse", "Data.String.strwidthpart_reverse")
+  call s:_warn_deprecated('strwidthpart_reverse', 'Data.String.strwidthpart_reverse')
 
   if a:width <= 0
     return ''
@@ -144,12 +159,12 @@ endfunction
 if v:version >= 703
   " Use builtin function.
   function! s:wcswidth(str) abort
-    call s:_warn_deprecated("wcswidth", "Data.String.wcswidth")
+    call s:_warn_deprecated('wcswidth', 'Data.String.wcswidth')
     return strwidth(a:str)
   endfunction
 else
   function! s:wcswidth(str) abort
-    call s:_warn_deprecated("wcswidth", "Data.String.wcswidth")
+    call s:_warn_deprecated('wcswidth', 'Data.String.wcswidth')
 
     if a:str =~# '^[\x00-\x7f]*$'
       return strlen(a:str)
@@ -218,14 +233,14 @@ endfunction
 function! s:_warn_deprecated(name, alternative) abort
   try
     echohl Error
-    echomsg "Prelude." . a:name . " is deprecated!  Please use " . a:alternative . " instead."
+    echomsg 'Prelude.' . a:name . ' is deprecated!  Please use ' . a:alternative . ' instead.'
   finally
     echohl None
   endtry
 endfunction
 
 function! s:smart_execute_command(action, word) abort
-  execute a:action . ' ' . (a:word == '' ? '' : '`=a:word`')
+  execute a:action . ' ' . (a:word ==# '' ? '' : '`=a:word`')
 endfunction
 
 function! s:escape_file_searching(buffer_name) abort
@@ -243,7 +258,7 @@ endfunction
 
 function! s:getchar_safe(...) abort
   let c = s:input_helper('getchar', a:000)
-  return type(c) == type("") ? c : nr2char(c)
+  return type(c) == type('') ? c : nr2char(c)
 endfunction
 
 function! s:input_safe(...) abort
@@ -253,13 +268,13 @@ endfunction
 function! s:input_helper(funcname, args) abort
   let success = 0
   if inputsave() !=# success
-    throw 'inputsave() failed'
+    throw 'vital: Prelude: inputsave() failed'
   endif
   try
     return call(a:funcname, a:args)
   finally
     if inputrestore() !=# success
-      throw 'inputrestore() failed'
+      throw 'vital: Prelude: inputrestore() failed'
     endif
   endtry
 endfunction
@@ -300,7 +315,7 @@ function! s:_path2project_directory_svn(path) abort
 
   let find_directory = s:escape_file_searching(search_directory)
   let d = finddir('.svn', find_directory . ';')
-  if d == ''
+  if d ==# ''
     return ''
   endif
 
@@ -310,9 +325,9 @@ function! s:_path2project_directory_svn(path) abort
   let parent_directory = s:path2directory(
         \ fnamemodify(directory, ':h'))
 
-  if parent_directory != ''
+  if parent_directory !=# ''
     let d = finddir('.svn', parent_directory . ';')
-    if d != ''
+    if d !=# ''
       let directory = s:_path2project_directory_svn(parent_directory)
     endif
   endif
@@ -325,7 +340,7 @@ function! s:_path2project_directory_others(vcs, path) abort
 
   let find_directory = s:escape_file_searching(search_directory)
   let d = finddir(vcs, find_directory . ';')
-  if d == ''
+  if d ==# ''
     return ''
   endif
   return fnamemodify(d, ':p:h:h')
@@ -345,25 +360,25 @@ function! s:path2project_directory(path, ...) abort
     else
       let directory = s:_path2project_directory_others(vcs, search_directory)
     endif
-    if directory != ''
+    if directory !=# ''
       break
     endif
   endfor
 
   " Search project file.
-  if directory == ''
+  if directory ==# ''
     for d in ['build.xml', 'prj.el', '.project', 'pom.xml', 'package.json',
           \ 'Makefile', 'configure', 'Rakefile', 'NAnt.build',
           \ 'P4CONFIG', 'tags', 'gtags']
       let d = findfile(d, s:escape_file_searching(search_directory) . ';')
-      if d != ''
+      if d !=# ''
         let directory = fnamemodify(d, ':p:h')
         break
       endif
     endfor
   endif
 
-  if directory == ''
+  if directory ==# ''
     " Search /src/ directory.
     let base = s:substitute_path_separator(search_directory)
     if base =~# '/src/'
@@ -371,7 +386,7 @@ function! s:path2project_directory(path, ...) abort
     endif
   endif
 
-  if directory == '' && !is_allow_empty
+  if directory ==# '' && !is_allow_empty
     " Use original path.
     let directory = search_directory
   endif
diff --git a/autoload/vital/_neosnippet/Process.vim b/autoload/vital/_neosnippet/Process.vim
index f04699b..a3ac87c 100644
--- a/autoload/vital/_neosnippet/Process.vim
+++ b/autoload/vital/_neosnippet/Process.vim
@@ -1,3 +1,18 @@
+" ___vital___
+" NOTE: lines between '" ___vital___' is generated by :Vitalize.
+" Do not mofidify the code nor insert new lines before '" ___vital___'
+if v:version > 703 || v:version == 703 && has('patch1170')
+  function! vital#_neosnippet#Process#import() abort
+    return map({'shellescape': '', 'has_vimproc': '', 'system': '', 'iconv': '', 'spawn': '', 'get_last_status': ''},  'function("s:" . v:key)')
+  endfunction
+else
+  function! s:_SID() abort
+    return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
+  endfunction
+  execute join(['function! vital#_neosnippet#Process#import() abort', printf("return map({'shellescape': '', 'has_vimproc': '', 'system': '', 'iconv': '', 'spawn': '', 'get_last_status': ''}, \"function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
+  delfunction s:_SID
+endif
+" ___vital___
 " TODO: move all comments to doc file.
 "
 "
@@ -19,23 +34,8 @@ let s:need_trans = v:version < 704 || (v:version == 704 && !has('patch122'))
 
 let s:TYPE_DICT = type({})
 let s:TYPE_LIST = type([])
-let s:TYPE_STRING = type("")
+let s:TYPE_STRING = type('')
 
-
-" Execute program in the background from Vim.
-" Return an empty string always.
-"
-" If a:expr is a List, shellescape() each argument.
-" If a:expr is a String, the arguments are passed as-is.
-"
-" Windows:
-" Using :!start , execute program without via cmd.exe.
-" Spawning 'expr' with 'noshellslash'
-" keep special characters from unwanted expansion.
-" (see :help shellescape())
-"
-" Unix:
-" using :! , execute program in the background by shell.
 function! s:spawn(expr, ...) abort
   let shellslash = 0
   if s:is_windows
@@ -70,11 +70,11 @@ endfunction
 
 " iconv() wrapper for safety.
 function! s:iconv(expr, from, to) abort
-  if a:from == '' || a:to == '' || a:from ==? a:to
+  if a:from ==# '' || a:to ==# '' || a:from ==? a:to
     return a:expr
   endif
   let result = iconv(a:expr, a:from, a:to)
-  return result != '' ? result : a:expr
+  return result !=# '' ? result : a:expr
 endfunction
 
 " Check vimproc.
diff --git a/autoload/vital/_neosnippet/System/Cache.vim b/autoload/vital/_neosnippet/System/Cache/Deprecated.vim
similarity index 66%
rename from autoload/vital/_neosnippet/System/Cache.vim
rename to autoload/vital/_neosnippet/System/Cache/Deprecated.vim
index b7c11ad..b21d6da 100644
--- a/autoload/vital/_neosnippet/System/Cache.vim
+++ b/autoload/vital/_neosnippet/System/Cache/Deprecated.vim
@@ -1,4 +1,20 @@
-" Utilities for output cache.
+" ___vital___
+" NOTE: lines between '" ___vital___' is generated by :Vitalize.
+" Do not mofidify the code nor insert new lines before '" ___vital___'
+if v:version > 703 || v:version == 703 && has('patch1170')
+  function! vital#_neosnippet#System#Cache#Deprecated#import() abort
+    return map({'filereadable': '', '_vital_depends': '', 'delete': '', 'readfile': '', 'getfilename': '', 'deletefile': '', 'check_old_cache': '', 'writefile': '', '_vital_loaded': ''},  'function("s:" . v:key)')
+  endfunction
+else
+  function! s:_SID() abort
+    return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
+  endfunction
+  execute join(['function! vital#_neosnippet#System#Cache#Deprecated#import() abort', printf("return map({'filereadable': '', '_vital_depends': '', 'delete': '', 'readfile': '', 'getfilename': '', 'deletefile': '', 'check_old_cache': '', 'writefile': '', '_vital_loaded': ''}, \"function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
+  delfunction s:_SID
+endif
+" ___vital___
+" Note:
+"   This module is deprecated. Use a new `Syste.Cache` instead.
 
 let s:save_cpo = &cpo
 set cpo&vim
@@ -48,7 +64,7 @@ function! s:_encode_name(cache_dir, filename) abort
     call mkdir(a:cache_dir, 'p')
   endif
   let cache_dir = a:cache_dir
-  if cache_dir !~ '/$'
+  if cache_dir !~# '/$'
     let cache_dir .= '/'
   endif
 
diff --git a/autoload/vital/neosnippet.vim b/autoload/vital/neosnippet.vim
new file mode 100644
index 0000000..bec6299
--- /dev/null
+++ b/autoload/vital/neosnippet.vim
@@ -0,0 +1,302 @@
+let s:plugin_name = expand('<sfile>:t:r')
+let s:vital_base_dir = expand('<sfile>:h')
+let s:project_root = expand('<sfile>:h:h:h')
+let s:has_latest_module = isdirectory(expand('<sfile>:h') . '/__latest__')
+let s:is_vital_vim = s:plugin_name is# '_latest__'
+
+let s:loaded = {}
+let s:cache_sid = {}
+
+" function() wrapper
+if v:version > 703 || v:version == 703 && has('patch1170')
+  function! s:_function(fstr) abort
+    return function(a:fstr)
+  endfunction
+else
+  function! s:_SID() abort
+    return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
+  endfunction
+  let s:_s = '<SNR>' . s:_SID() . '_'
+  function! s:_function(fstr) abort
+    return function(substitute(a:fstr, 's:', s:_s, 'g'))
+  endfunction
+endif
+
+function! vital#{s:plugin_name}#of() abort
+  return s:new(s:plugin_name)
+endfunction
+
+let s:Vital = {}
+
+function! s:new(plugin_name) abort
+  let base = deepcopy(s:Vital)
+  let base.plugin_name = a:plugin_name
+  return base
+endfunction
+
+function! s:vital_files() abort
+  if !exists('s:vital_files')
+    let s:vital_files = map(
+    \   s:is_vital_vim ? s:_global_vital_files() : s:_self_vital_files(),
+    \   'fnamemodify(v:val, ":p:gs?[\\\\/]?/?")')
+  endif
+  return copy(s:vital_files)
+endfunction
+let s:Vital.vital_files = s:_function('s:vital_files')
+
+function! s:import(name, ...) abort dict
+  let target = {}
+  let functions = []
+  for a in a:000
+    if type(a) == type({})
+      let target = a
+    elseif type(a) == type([])
+      let functions = a
+    endif
+    unlet a
+  endfor
+  let module = self._import(a:name)
+  if empty(functions)
+    call extend(target, module, 'keep')
+  else
+    for f in functions
+      if has_key(module, f) && !has_key(target, f)
+        let target[f] = module[f]
+      endif
+    endfor
+  endif
+  return target
+endfunction
+let s:Vital.import = s:_function('s:import')
+
+function! s:load(...) abort dict
+  for arg in a:000
+    let [name; as] = type(arg) == type([]) ? arg[: 1] : [arg, arg]
+    let target = split(join(as, ''), '\W\+')
+    let dict = self
+    let dict_type = type({})
+    while !empty(target)
+      let ns = remove(target, 0)
+      if !has_key(dict, ns)
+        let dict[ns] = {}
+      endif
+      if type(dict[ns]) == dict_type
+        let dict = dict[ns]
+      else
+        unlet dict
+        break
+      endif
+    endwhile
+    if exists('dict')
+      call extend(dict, self._import(name))
+    endif
+    unlet arg
+  endfor
+  return self
+endfunction
+let s:Vital.load = s:_function('s:load')
+
+function! s:unload() abort dict
+  let s:loaded = {}
+  let s:cache_sid = {}
+  unlet! s:vital_files
+endfunction
+let s:Vital.unload = s:_function('s:unload')
+
+function! s:exists(name) abort dict
+  let b = exists(printf('*vital#_%s#%s#import', self.plugin_name, substitute(a:name, '\.', '#', 'g')))
+  if b
+    return b
+  endif
+  let name_path = substitute(a:name, '\.', '/', 'g')
+  let path = printf('%s/_%s/%s.vim', s:vital_base_dir, self.plugin_name, name_path)
+  let b = filereadable(path)
+  if b
+    return b
+  endif
+  let path = printf('%s/_%s/%s.vim', s:vital_base_dir, '_latest__', name_path)
+  let b = filereadable(path)
+endfunction
+let s:Vital.exists = s:_function('s:exists')
+
+function! s:search(pattern) abort dict
+  let paths = s:_extract_files(a:pattern, self.vital_files())
+  let modules = sort(map(paths, 's:_file2module(v:val)'))
+  return s:_uniq(modules)
+endfunction
+let s:Vital.search = s:_function('s:search')
+
+function! s:_self_vital_files() abort
+  let base = s:vital_base_dir . '/*/**/*.vim'
+  return split(glob(base, 1), "\n")
+endfunction
+
+function! s:_global_vital_files() abort
+  let pattern = 'autoload/vital/__latest__/**/*.vim'
+  return split(globpath(&runtimepath, pattern, 1), "\n")
+endfunction
+
+function! s:_extract_files(pattern, files) abort
+  let tr = {'.': '/', '*': '[^/]*', '**': '.*'}
+  let target = substitute(a:pattern, '\.\|\*\*\?', '\=tr[submatch(0)]', 'g')
+  let regexp = printf('autoload/vital/[^/]\+/%s.vim$', target)
+  return filter(a:files, 'v:val =~# regexp')
+endfunction
+
+function! s:_file2module(file) abort
+  let filename = fnamemodify(a:file, ':p:gs?[\\/]?/?')
+  let tail = matchstr(filename, 'autoload/vital/_\w\+/\zs.*\ze\.vim$')
+  return join(split(tail, '[\\/]\+'), '.')
+endfunction
+
+" @param {string} name e.g. Data.List
+function! s:_import(name) abort dict
+  if has_key(s:loaded, a:name)
+    return copy(s:loaded[a:name])
+  endif
+  let module = self._get_module(a:name)
+  if has_key(module, '_vital_created')
+    call module._vital_created(module)
+  endif
+  let export_module = filter(copy(module), 'v:key =~# "^\\a"')
+  " Cache module before calling module.vital_loaded() to avoid cyclic
+  " dependences but remove the cache if module._vital_loaded() fails.
+  " let s:loaded[a:name] = export_module
+  let s:loaded[a:name] = export_module
+  if has_key(module, '_vital_loaded')
+    try
+      call module._vital_loaded(vital#{s:plugin_name}#of())
+    catch
+      unlet s:loaded[a:name]
+      throw 'vital: fail to call ._vital_loaded(): ' . v:exception
+    endtry
+  endif
+  return copy(s:loaded[a:name])
+endfunction
+let s:Vital._import = s:_function('s:_import')
+
+" s:_get_module() returns module object wihch has all script local functions.
+function! s:_get_module(name) abort dict
+  try
+    let module = vital#_{self.plugin_name}#{substitute(a:name, '\.', '#', 'g')}#import()
+  catch /E117: Unknown function:/
+    if !s:has_latest_module
+      throw 'vital: module not found: ' . a:name
+    endif
+    " Retry to support loading self modules.
+    let module = s:_get_latest_module(a:name)
+  endtry
+  return module
+endfunction
+let s:Vital._get_module = s:_function('s:_get_module')
+
+function! s:_get_latest_module(name) abort
+ return s:sid2sfuncs(s:_module_sid(a:name))
+endfunction
+
+function! s:_module_sid(name) abort
+  let module_rel_path = 'autoload/vital/__latest__/' . substitute(a:name, '\.', '/', 'g') . '.vim'
+  let module_full_path = s:_unify_path(get(split(globpath(s:_module_sid_base_dir(), module_rel_path, 0), "\n"), 0, ''))
+  if !filereadable(module_full_path)
+    throw 'vital: module not found: ' . a:name
+  endif
+  let p = substitute(module_rel_path, '/', '[/\\\\]\\+', 'g')
+  let sid = s:_sid(module_full_path, p)
+  if !sid
+    call s:_source(module_full_path)
+    let sid = s:_sid(module_full_path, p)
+    if !sid
+      throw 'vital: cannot get <SID> from path'
+    endif
+  endif
+  return sid
+endfunction
+
+function! s:_module_sid_base_dir() abort
+  return s:is_vital_vim ? &rtp : s:project_root
+endfunction
+
+function! s:_source(path) abort
+  execute 'source' fnameescape(a:path)
+endfunction
+
+" @vimlint(EVL102, 1, l:_)
+" @vimlint(EVL102, 1, l:__)
+function! s:_sid(fullpath, filter_pattern) abort
+  if has_key(s:cache_sid, a:fullpath)
+    return s:cache_sid[a:fullpath]
+  endif
+  for line in filter(split(s:_redir(':scriptnames'), "\n"), 'v:val =~# a:filter_pattern')
+    let [_, sid, path; __] = matchlist(line, '^\s*\(\d\+\):\s\+\(.\+\)\s*$')
+    if s:_unify_path(path) is# a:fullpath
+      let s:cache_sid[a:fullpath] = sid
+      return s:cache_sid[a:fullpath]
+    endif
+  endfor
+  return 0
+endfunction
+
+function! s:_redir(cmd) abort
+  let [save_verbose, save_verbosefile] = [&verbose, &verbosefile]
+  set verbose=0 verbosefile=
+  redir => res
+    silent! execute a:cmd
+  redir END
+  let [&verbose, &verbosefile] = [save_verbose, save_verbosefile]
+  return res
+endfunction
+
+if filereadable(expand('<sfile>:r') . '.VIM')
+  let s:_unify_path_cache = {}
+  " resolve() is slow, so we cache results.
+  " Note: On windows, vim can't expand path names from 8.3 formats.
+  " So if getting full path via <sfile> and $HOME was set as 8.3 format,
+  " vital load duplicated scripts. Below's :~ avoid this issue.
+  function! s:_unify_path(path) abort
+    if has_key(s:_unify_path_cache, a:path)
+      return s:_unify_path_cache[a:path]
+    endif
+    let value = tolower(fnamemodify(resolve(fnamemodify(
+    \                   a:path, ':p')), ':~:gs?[\\/]?/?'))
+    let s:_unify_path_cache[a:path] = value
+    return value
+  endfunction
+else
+  function! s:_unify_path(path) abort
+    return resolve(fnamemodify(a:path, ':p:gs?[\\/]?/?'))
+  endfunction
+endif
+
+" copied and modified from Vim.ScriptLocal
+let s:SNR = join(map(range(len("\<SNR>")), '"[\\x" . printf("%0x", char2nr("\<SNR>"[v:val])) . "]"'), '')
+function! s:sid2sfuncs(sid) abort
+  let fs = split(s:_redir(printf(':function /^%s%s_', s:SNR, a:sid)), "\n")
+  let r = {}
+  let pattern = printf('\m^function\s<SNR>%d_\zs\w\{-}\ze(', a:sid)
+  for fname in map(fs, 'matchstr(v:val, pattern)')
+    let r[fname] = function(s:_sfuncname(a:sid, fname))
+  endfor
+  return r
+endfunction
+
+"" Return funcname of script local functions with SID
+function! s:_sfuncname(sid, funcname) abort
+  return printf('<SNR>%s_%s', a:sid, a:funcname)
+endfunction
+
+if exists('*uniq')
+  function! s:_uniq(list) abort
+    return uniq(a:list)
+  endfunction
+else
+  function! s:_uniq(list) abort
+    let i = len(a:list) - 1
+    while 0 < i
+      if a:list[i] ==# a:list[i - 1]
+        call remove(a:list, i)
+      endif
+        let i -= 1
+    endwhile
+    return a:list
+  endfunction
+endif
diff --git a/autoload/vital/neosnippet.vital b/autoload/vital/neosnippet.vital
index 9e91d1d..c3243ed 100644
--- a/autoload/vital/neosnippet.vital
+++ b/autoload/vital/neosnippet.vital
@@ -1,8 +1,8 @@
 neosnippet
-1c73bcc
+024411ba1a5f3d545899c1be6eaa40bba036ae0d
 
 Prelude
 Data.List
 Process
-System.Cache
 Data.String
+System.Cache.Deprecated