diff --git a/.gitignore b/.gitignore
index 8ad5459..883a84a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
+doc/tags
 utils/stylua
+
diff --git a/autoload/cmp.vim b/autoload/cmp.vim
index 8fcdeeb..43b8cc2 100644
--- a/autoload/cmp.vim
+++ b/autoload/cmp.vim
@@ -1,18 +1,6 @@
 let s:bridge_id = 0
 let s:sources = {}
 
-"
-" cmp#apply_text_edits
-"
-" TODO: Remove this if nvim's apply_text_edits will be improved.
-"
-function! cmp#apply_text_edits(bufnr, text_edits) abort
-  if !exists('s:TextEdit')
-    let s:TextEdit = vital#cmp#import('VS.LSP.TextEdit')
-  endif
-  call s:TextEdit.apply(a:bufnr, a:text_edits)
-endfunction
-
 "
 " cmp#register_source
 "
diff --git a/autoload/vital/_cmp.vim b/autoload/vital/_cmp.vim
deleted file mode 100644
index 5510495..0000000
--- a/autoload/vital/_cmp.vim
+++ /dev/null
@@ -1,9 +0,0 @@
-let s:_plugin_name = expand('<sfile>:t:r')
-
-function! vital#{s:_plugin_name}#new() abort
-  return vital#{s:_plugin_name[1:]}#new()
-endfunction
-
-function! vital#{s:_plugin_name}#function(funcname) abort
-  silent! return function(a:funcname)
-endfunction
diff --git a/autoload/vital/_cmp/VS/LSP/Position.vim b/autoload/vital/_cmp/VS/LSP/Position.vim
deleted file mode 100644
index f53c76a..0000000
--- a/autoload/vital/_cmp/VS/LSP/Position.vim
+++ /dev/null
@@ -1,62 +0,0 @@
-" ___vital___
-" NOTE: lines between '" ___vital___' is generated by :Vitalize.
-" Do not modify the code nor insert new lines before '" ___vital___'
-function! s:_SID() abort
-  return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
-endfunction
-execute join(['function! vital#_cmp#VS#LSP#Position#import() abort', printf("return map({'cursor': '', 'vim_to_lsp': '', 'lsp_to_vim': ''}, \"vital#_cmp#function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
-delfunction s:_SID
-" ___vital___
-"
-" cursor
-"
-function! s:cursor() abort
-  return s:vim_to_lsp('%', getpos('.')[1 : 3])
-endfunction
-
-"
-" vim_to_lsp
-"
-function! s:vim_to_lsp(expr, pos) abort
-  let l:line = s:_get_buffer_line(a:expr, a:pos[0])
-  if l:line is v:null
-    return {
-    \   'line': a:pos[0] - 1,
-    \   'character': a:pos[1] - 1
-    \ }
-  endif
-
-  return {
-  \   'line': a:pos[0] - 1,
-  \   'character': strchars(strpart(l:line, 0, a:pos[1] - 1))
-  \ }
-endfunction
-
-"
-" lsp_to_vim
-"
-function! s:lsp_to_vim(expr, position) abort
-  let l:line = s:_get_buffer_line(a:expr, a:position.line + 1)
-  if l:line is v:null
-    return [a:position.line + 1, a:position.character + 1]
-  endif
-  return [a:position.line + 1, byteidx(l:line, a:position.character) + 1]
-endfunction
-
-"
-" _get_buffer_line
-"
-function! s:_get_buffer_line(expr, lnum) abort
-  try
-    let l:expr = bufnr(a:expr)
-  catch /.*/
-    let l:expr = a:expr
-  endtry
-  if bufloaded(l:expr)
-    return get(getbufline(l:expr, a:lnum), 0, v:null)
-  elseif filereadable(a:expr)
-    return get(readfile(a:expr, '', a:lnum), 0, v:null)
-  endif
-  return v:null
-endfunction
-
diff --git a/autoload/vital/_cmp/VS/LSP/Text.vim b/autoload/vital/_cmp/VS/LSP/Text.vim
deleted file mode 100644
index 0c09314..0000000
--- a/autoload/vital/_cmp/VS/LSP/Text.vim
+++ /dev/null
@@ -1,23 +0,0 @@
-" ___vital___
-" NOTE: lines between '" ___vital___' is generated by :Vitalize.
-" Do not modify the code nor insert new lines before '" ___vital___'
-function! s:_SID() abort
-  return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
-endfunction
-execute join(['function! vital#_cmp#VS#LSP#Text#import() abort', printf("return map({'normalize_eol': '', 'split_by_eol': ''}, \"vital#_cmp#function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
-delfunction s:_SID
-" ___vital___
-"
-" normalize_eol
-"
-function! s:normalize_eol(text) abort
-  return substitute(a:text, "\r\n\\|\r", "\n", 'g')
-endfunction
-
-"
-" split_by_eol
-"
-function! s:split_by_eol(text) abort
-  return split(a:text, "\r\n\\|\r\\|\n", v:true)
-endfunction
-
diff --git a/autoload/vital/_cmp/VS/LSP/TextEdit.vim b/autoload/vital/_cmp/VS/LSP/TextEdit.vim
deleted file mode 100644
index 09a8df8..0000000
--- a/autoload/vital/_cmp/VS/LSP/TextEdit.vim
+++ /dev/null
@@ -1,185 +0,0 @@
-" ___vital___
-" NOTE: lines between '" ___vital___' is generated by :Vitalize.
-" Do not modify the code nor insert new lines before '" ___vital___'
-function! s:_SID() abort
-  return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
-endfunction
-execute join(['function! vital#_cmp#VS#LSP#TextEdit#import() abort', printf("return map({'_vital_depends': '', 'apply': '', '_vital_loaded': ''}, \"vital#_cmp#function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
-delfunction s:_SID
-" ___vital___
-"
-" _vital_loaded
-"
-function! s:_vital_loaded(V) abort
-  let s:Text = a:V.import('VS.LSP.Text')
-  let s:Position = a:V.import('VS.LSP.Position')
-  let s:Buffer = a:V.import('VS.Vim.Buffer')
-  let s:Option = a:V.import('VS.Vim.Option')
-endfunction
-
-"
-" _vital_depends
-"
-function! s:_vital_depends() abort
-  return ['VS.LSP.Text', 'VS.LSP.Position', 'VS.Vim.Buffer', 'VS.Vim.Option']
-endfunction
-
-"
-" apply
-"
-function! s:apply(path, text_edits) abort
-  let l:current_bufname = bufname('%')
-  let l:current_position = s:Position.cursor()
-
-  let l:target_bufnr = s:_switch(a:path)
-  call s:_substitute(l:target_bufnr, a:text_edits, l:current_position)
-  let l:current_bufnr = s:_switch(l:current_bufname)
-
-  if l:current_bufnr == l:target_bufnr
-    call cursor(s:Position.lsp_to_vim('%', l:current_position))
-  endif
-endfunction
-
-"
-" _substitute
-"
-function! s:_substitute(bufnr, text_edits, current_position) abort
-  try
-    " Save state.
-    let l:Restore = s:Option.define({
-    \   'foldenable': '0',
-    \ })
-    let l:view = winsaveview()
-
-    " Apply substitute.
-    let [l:fixeol, l:text_edits] = s:_normalize(a:bufnr, a:text_edits)
-    for l:text_edit in l:text_edits
-      let l:start = s:Position.lsp_to_vim(a:bufnr, l:text_edit.range.start)
-      let l:end = s:Position.lsp_to_vim(a:bufnr, l:text_edit.range.end)
-      let l:text = s:Text.normalize_eol(l:text_edit.newText)
-      execute printf('noautocmd keeppatterns keepjumps silent %ssubstitute/\%%%sl\%%%sc\_.\{-}\%%%sl\%%%sc/\=l:text/%se',
-      \   l:start[0],
-      \   l:start[0],
-      \   l:start[1],
-      \   l:end[0],
-      \   l:end[1],
-      \   &gdefault ? 'g' : ''
-      \ )
-      call s:_fix_cursor_position(a:current_position, l:text_edit, s:Text.split_by_eol(l:text))
-    endfor
-
-    " Remove last empty line if fixeol enabled.
-    if l:fixeol && getline('$') ==# ''
-      noautocmd keeppatterns keepjumps silent $delete _
-    endif
-  catch /.*/
-    echomsg string({ 'exception': v:exception, 'throwpoint': v:throwpoint })
-  finally
-    " Restore state.
-    call l:Restore()
-    call winrestview(l:view)
-  endtry
-endfunction
-
-"
-" _fix_cursor_position
-"
-function! s:_fix_cursor_position(position, text_edit, lines) abort
-  let l:lines_len = len(a:lines)
-  let l:range_len = (a:text_edit.range.end.line - a:text_edit.range.start.line) + 1
-
-  if a:text_edit.range.end.line < a:position.line
-    let a:position.line += l:lines_len - l:range_len
-  elseif a:text_edit.range.end.line == a:position.line && a:text_edit.range.end.character <= a:position.character
-    let a:position.line += l:lines_len - l:range_len
-    let a:position.character = strchars(a:lines[-1]) + (a:position.character - a:text_edit.range.end.character)
-    if l:lines_len == 1
-      let a:position.character += a:text_edit.range.start.character
-    endif
-  endif
-endfunction
-
-"
-" _normalize
-"
-function! s:_normalize(bufnr, text_edits) abort
-  let l:text_edits = type(a:text_edits) == type([]) ? a:text_edits : [a:text_edits]
-  let l:text_edits = s:_range(l:text_edits)
-  let l:text_edits = sort(l:text_edits, function('s:_compare'))
-  let l:text_edits = reverse(l:text_edits)
-  return s:_fix_text_edits(a:bufnr, l:text_edits)
-endfunction
-
-"
-" _range
-"
-function! s:_range(text_edits) abort
-  let l:text_edits = []
-  for l:text_edit in a:text_edits
-    if type(l:text_edit) != type({})
-      continue
-    endif
-    if l:text_edit.range.start.line > l:text_edit.range.end.line || (
-    \   l:text_edit.range.start.line == l:text_edit.range.end.line &&
-    \   l:text_edit.range.start.character > l:text_edit.range.end.character
-    \ )
-      let l:text_edit.range = { 'start': l:text_edit.range.end, 'end': l:text_edit.range.start }
-    endif
-    let l:text_edits += [l:text_edit]
-  endfor
-  return l:text_edits
-endfunction
-
-"
-" _compare
-"
-function! s:_compare(text_edit1, text_edit2) abort
-  let l:diff = a:text_edit1.range.start.line - a:text_edit2.range.start.line
-  if l:diff == 0
-    return a:text_edit1.range.start.character - a:text_edit2.range.start.character
-  endif
-  return l:diff
-endfunction
-
-"
-" _fix_text_edits
-"
-function! s:_fix_text_edits(bufnr, text_edits) abort
-  let l:max = s:Buffer.get_line_count(a:bufnr)
-
-  let l:fixeol = v:false
-  let l:text_edits = []
-  for l:text_edit in a:text_edits
-    if l:max <= l:text_edit.range.start.line
-      let l:text_edit.range.start.line = l:max - 1
-      let l:text_edit.range.start.character = strchars(get(getbufline(a:bufnr, '$'), 0, ''))
-      let l:text_edit.newText = "\n" . l:text_edit.newText
-      let l:fixeol = &fixendofline && !&binary
-    endif
-    if l:max <= l:text_edit.range.end.line
-      let l:text_edit.range.end.line = l:max - 1
-      let l:text_edit.range.end.character = strchars(get(getbufline(a:bufnr, '$'), 0, ''))
-      let l:fixeol = &fixendofline && !&binary
-    endif
-    call add(l:text_edits, l:text_edit)
-  endfor
-
-  return [l:fixeol, l:text_edits]
-endfunction
-
-"
-" _switch
-"
-function! s:_switch(path) abort
-  let l:curr = bufnr('%')
-  let l:next = bufnr(a:path)
-  if l:next >= 0
-    if l:curr != l:next
-      execute printf('noautocmd keepalt keepjumps %sbuffer!', bufnr(a:path))
-    endif
-  else
-    execute printf('noautocmd keepalt keepjumps edit! %s', fnameescape(a:path))
-  endif
-  return bufnr('%')
-endfunction
-
diff --git a/autoload/vital/_cmp/VS/Vim/Buffer.vim b/autoload/vital/_cmp/VS/Vim/Buffer.vim
deleted file mode 100644
index df58dcd..0000000
--- a/autoload/vital/_cmp/VS/Vim/Buffer.vim
+++ /dev/null
@@ -1,126 +0,0 @@
-" ___vital___
-" NOTE: lines between '" ___vital___' is generated by :Vitalize.
-" Do not modify the code nor insert new lines before '" ___vital___'
-function! s:_SID() abort
-  return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
-endfunction
-execute join(['function! vital#_cmp#VS#Vim#Buffer#import() abort', printf("return map({'get_line_count': '', 'do': '', 'create': '', 'pseudo': '', 'ensure': '', 'load': ''}, \"vital#_cmp#function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
-delfunction s:_SID
-" ___vital___
-let s:Do = { -> {} }
-
-let g:___VS_Vim_Buffer_id = get(g:, '___VS_Vim_Buffer_id', 0)
-
-"
-" get_line_count
-"
-if exists('*nvim_buf_line_count')
-  function! s:get_line_count(bufnr) abort
-    return nvim_buf_line_count(a:bufnr)
-  endfunction
-elseif has('patch-8.2.0019')
-  function! s:get_line_count(bufnr) abort
-    return getbufinfo(a:bufnr)[0].linecount
-  endfunction
-else
-  function! s:get_line_count(bufnr) abort
-    if bufnr('%') == bufnr(a:bufnr)
-      return line('$')
-    endif
-    return len(getbufline(a:bufnr, '^', '$'))
-  endfunction
-endif
-
-"
-" create
-"
-function! s:create(...) abort
-  let g:___VS_Vim_Buffer_id += 1
-  let l:bufname = printf('VS.Vim.Buffer: %s: %s',
-  \   g:___VS_Vim_Buffer_id,
-  \   get(a:000, 0, 'VS.Vim.Buffer.Default')
-  \ )
-  return s:load(l:bufname)
-endfunction
-
-"
-" ensure
-"
-function! s:ensure(expr) abort
-  if !bufexists(a:expr)
-    if type(a:expr) == type(0)
-      throw printf('VS.Vim.Buffer: `%s` is not valid expr.', a:expr)
-    endif
-    badd `=a:expr`
-  endif
-  return bufnr(a:expr)
-endfunction
-
-"
-" load
-"
-if exists('*bufload')
-  function! s:load(expr) abort
-    let l:bufnr = s:ensure(a:expr)
-    if !bufloaded(l:bufnr)
-      call bufload(l:bufnr)
-    endif
-    return l:bufnr
-  endfunction
-else
-  function! s:load(expr) abort
-    let l:curr_bufnr = bufnr('%')
-    try
-      let l:bufnr = s:ensure(a:expr)
-      execute printf('keepalt keepjumps silent %sbuffer', l:bufnr)
-    catch /.*/
-      echomsg string({ 'exception': v:exception, 'throwpoint': v:throwpoint })
-    finally
-      execute printf('noautocmd keepalt keepjumps silent %sbuffer', l:curr_bufnr)
-    endtry
-    return l:bufnr
-  endfunction
-endif
-
-"
-" do
-"
-function! s:do(bufnr, func) abort
-  let l:curr_bufnr = bufnr('%')
-  if l:curr_bufnr == a:bufnr
-    call a:func()
-    return
-  endif
-
-  try
-    execute printf('noautocmd keepalt keepjumps silent %sbuffer', a:bufnr)
-    call a:func()
-  catch /.*/
-    echomsg string({ 'exception': v:exception, 'throwpoint': v:throwpoint })
-  finally
-    execute printf('noautocmd keepalt keepjumps silent %sbuffer', l:curr_bufnr)
-  endtry
-endfunction
-
-"
-" pseudo
-"
-function! s:pseudo(filepath) abort
-  if !filereadable(a:filepath)
-    throw printf('VS.Vim.Buffer: `%s` is not valid filepath.', a:filepath)
-  endif
-
-  " create pseudo buffer
-  let l:bufname = printf('VSVimBufferPseudo://%s', a:filepath)
-  if bufexists(l:bufname)
-    return s:ensure(l:bufname)
-  endif
-
-  let l:bufnr = s:ensure(l:bufname)
-  let l:group = printf('VS_Vim_Buffer_pseudo:%s', l:bufnr)
-  execute printf('augroup %s', l:group)
-    execute printf('autocmd BufReadCmd <buffer=%s> call setline(1, readfile(bufname("%")[20 : -1])) | try | filetype detect | catch /.*/ | endtry | augroup %s | autocmd! | augroup END', l:bufnr, l:group)
-  augroup END
-  return l:bufnr
-endfunction
-
diff --git a/autoload/vital/_cmp/VS/Vim/Option.vim b/autoload/vital/_cmp/VS/Vim/Option.vim
deleted file mode 100644
index 0435133..0000000
--- a/autoload/vital/_cmp/VS/Vim/Option.vim
+++ /dev/null
@@ -1,21 +0,0 @@
-" ___vital___
-" NOTE: lines between '" ___vital___' is generated by :Vitalize.
-" Do not modify the code nor insert new lines before '" ___vital___'
-function! s:_SID() abort
-  return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
-endfunction
-execute join(['function! vital#_cmp#VS#Vim#Option#import() abort', printf("return map({'define': ''}, \"vital#_cmp#function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
-delfunction s:_SID
-" ___vital___
-"
-" define
-"
-function! s:define(map) abort
-  let l:old = {}
-  for [l:key, l:value] in items(a:map)
-    let l:old[l:key] = eval(printf('&%s', l:key))
-    execute printf('let &%s = "%s"', l:key, l:value)
-  endfor
-  return { -> s:define(l:old) }
-endfunction
-
diff --git a/autoload/vital/cmp.vim b/autoload/vital/cmp.vim
deleted file mode 100644
index 6730f4e..0000000
--- a/autoload/vital/cmp.vim
+++ /dev/null
@@ -1,330 +0,0 @@
-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:is_vital_vim = s:plugin_name is# 'vital'
-
-let s:loaded = {}
-let s:cache_sid = {}
-
-function! vital#{s:plugin_name}#new() abort
-  return s:new(s:plugin_name)
-endfunction
-
-function! vital#{s:plugin_name}#import(...) abort
-  if !exists('s:V')
-    let s:V = s:new(s:plugin_name)
-  endif
-  return call(s:V.import, a:000, s:V)
-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 = 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 = 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 = function('s:load')
-
-function! s:unload() abort dict
-  let s:loaded = {}
-  let s:cache_sid = {}
-  unlet! s:vital_files
-endfunction
-let s:Vital.unload = function('s:unload')
-
-function! s:exists(name) abort dict
-  if a:name !~# '\v^\u\w*%(\.\u\w*)*$'
-    throw 'vital: Invalid module name: ' . a:name
-  endif
-  return s:_module_path(a:name) isnot# ''
-endfunction
-let s:Vital.exists = 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 uniq(modules)
-endfunction
-let s:Vital.search = function('s:search')
-
-function! s:plugin_name() abort dict
-  return self._plugin_name
-endfunction
-let s:Vital.plugin_name = function('s:plugin_name')
-
-function! s:_self_vital_files() abort
-  let builtin = printf('%s/__%s__/', s:vital_base_dir, s:plugin_name)
-  let installed = printf('%s/_%s/', s:vital_base_dir, s:plugin_name)
-  let base = builtin . ',' . installed
-  return split(globpath(base, '**/*.vim', 1), "\n")
-endfunction
-
-function! s:_global_vital_files() abort
-  let pattern = 'autoload/vital/__*__/**/*.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}#new())
-    catch
-      unlet s:loaded[a:name]
-      throw 'vital: fail to call ._vital_loaded(): ' . v:exception . " from:\n" . s:_format_throwpoint(v:throwpoint)
-    endtry
-  endif
-  return copy(s:loaded[a:name])
-endfunction
-let s:Vital._import = function('s:_import')
-
-function! s:_format_throwpoint(throwpoint) abort
-  let funcs = []
-  let stack = matchstr(a:throwpoint, '^function \zs.*, .\{-} \d\+$')
-  for line in split(stack, '\.\.')
-    let m = matchlist(line, '^\(.\+\)\%(\[\(\d\+\)\]\|, .\{-} \(\d\+\)\)$')
-    if !empty(m)
-      let [name, lnum, lnum2] = m[1:3]
-      if empty(lnum)
-        let lnum = lnum2
-      endif
-      let info = s:_get_func_info(name)
-      if !empty(info)
-        let attrs = empty(info.attrs) ? '' : join([''] + info.attrs)
-        let flnum = info.lnum == 0 ? '' : printf(' Line:%d', info.lnum + lnum)
-        call add(funcs, printf('function %s(...)%s Line:%d (%s%s)',
-        \        info.funcname, attrs, lnum, info.filename, flnum))
-        continue
-      endif
-    endif
-    " fallback when function information cannot be detected
-    call add(funcs, line)
-  endfor
-  return join(funcs, "\n")
-endfunction
-
-function! s:_get_func_info(name) abort
-  let name = a:name
-  if a:name =~# '^\d\+$'  " is anonymous-function
-    let name = printf('{%s}', a:name)
-  elseif a:name =~# '^<lambda>\d\+$'  " is lambda-function
-    let name = printf("{'%s'}", a:name)
-  endif
-  if !exists('*' . name)
-    return {}
-  endif
-  let body = execute(printf('verbose function %s', name))
-  let lines = split(body, "\n")
-  let signature = matchstr(lines[0], '^\s*\zs.*')
-  let [_, file, lnum; __] = matchlist(lines[1],
-  \   '^\t\%(Last set from\|.\{-}:\)\s*\zs\(.\{-}\)\%( \S\+ \(\d\+\)\)\?$')
-  return {
-  \   'filename': substitute(file, '[/\\]\+', '/', 'g'),
-  \   'lnum': 0 + lnum,
-  \   'funcname': a:name,
-  \   'arguments': split(matchstr(signature, '(\zs.*\ze)'), '\s*,\s*'),
-  \   'attrs': filter(['dict', 'abort', 'range', 'closure'], 'signature =~# (").*" . v:val)'),
-  \ }
-endfunction
-
-" s:_get_module() returns module object wihch has all script local functions.
-function! s:_get_module(name) abort dict
-  let funcname = s:_import_func_name(self.plugin_name(), a:name)
-  try
-    return call(funcname, [])
-  catch /^Vim\%((\a\+)\)\?:E117:/
-    return s:_get_builtin_module(a:name)
-  endtry
-endfunction
-
-function! s:_get_builtin_module(name) abort
- return s:sid2sfuncs(s:_module_sid(a:name))
-endfunction
-
-if s:is_vital_vim
-  " For vital.vim, we can use s:_get_builtin_module directly
-  let s:Vital._get_module = function('s:_get_builtin_module')
-else
-  let s:Vital._get_module = function('s:_get_module')
-endif
-
-function! s:_import_func_name(plugin_name, module_name) abort
-  return printf('vital#_%s#%s#import', a:plugin_name, s:_dot_to_sharp(a:module_name))
-endfunction
-
-function! s:_module_sid(name) abort
-  let path = s:_module_path(a:name)
-  if !filereadable(path)
-    throw 'vital: module not found: ' . a:name
-  endif
-  let vital_dir = s:is_vital_vim ? '__\w\+__' : printf('_\{1,2}%s\%%(__\)\?', s:plugin_name)
-  let base = join([vital_dir, ''], '[/\\]\+')
-  let p = base . substitute('' . a:name, '\.', '[/\\\\]\\+', 'g')
-  let sid = s:_sid(path, p)
-  if !sid
-    call s:_source(path)
-    let sid = s:_sid(path, p)
-    if !sid
-      throw printf('vital: cannot get <SID> from path: %s', path)
-    endif
-  endif
-  return sid
-endfunction
-
-function! s:_module_path(name) abort
-  return get(s:_extract_files(a:name, s:vital_files()), 0, '')
-endfunction
-
-function! s:_module_sid_base_dir() abort
-  return s:is_vital_vim ? &rtp : s:project_root
-endfunction
-
-function! s:_dot_to_sharp(name) abort
-  return substitute(a:name, '\.', '#', 'g')
-endfunction
-
-function! s:_source(path) abort
-  execute 'source' fnameescape(a:path)
-endfunction
-
-" @vimlint(EVL102, 1, l:_)
-" @vimlint(EVL102, 1, l:__)
-function! s:_sid(path, filter_pattern) abort
-  let unified_path = s:_unify_path(a:path)
-  if has_key(s:cache_sid, unified_path)
-    return s:cache_sid[unified_path]
-  endif
-  for line in filter(split(execute(':scriptnames'), "\n"), 'v:val =~# a:filter_pattern')
-    let [_, sid, path; __] = matchlist(line, '^\s*\(\d\+\):\s\+\(.\+\)\s*$')
-    if s:_unify_path(path) is# unified_path
-      let s:cache_sid[unified_path] = sid
-      return s:cache_sid[unified_path]
-    endif
-  endfor
-  return 0
-endfunction
-
-if filereadable(expand('<sfile>:r') . '.VIM') " is case-insensitive or not
-  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(execute(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
diff --git a/autoload/vital/cmp.vital b/autoload/vital/cmp.vital
deleted file mode 100644
index 1213d2a..0000000
--- a/autoload/vital/cmp.vital
+++ /dev/null
@@ -1,4 +0,0 @@
-cmp
-2755f0c8fbd3442bcb7f567832e4d1455b57f9a2
-
-VS.LSP.TextEdit
diff --git a/lua/cmp/core.lua b/lua/cmp/core.lua
index 24e9017..9347a21 100644
--- a/lua/cmp/core.lua
+++ b/lua/cmp/core.lua
@@ -314,8 +314,8 @@ core.confirm = function(self, e, option, callback)
     end
   end)
   feedkeys.call('', 'n', function()
+    local ctx = context.new()
     if #(misc.safe(e:get_completion_item().additionalTextEdits) or {}) == 0 then
-      local pre = context.new()
       e:resolve(function()
         local new = context.new()
         local text_edits = misc.safe(e:get_completion_item().additionalTextEdits) or {}
@@ -324,8 +324,8 @@ core.confirm = function(self, e, option, callback)
         end
 
         local has_cursor_line_text_edit = (function()
-          local minrow = math.min(pre.cursor.row, new.cursor.row)
-          local maxrow = math.max(pre.cursor.row, new.cursor.row)
+          local minrow = math.min(ctx.cursor.row, new.cursor.row)
+          local maxrow = math.max(ctx.cursor.row, new.cursor.row)
           for _, te in ipairs(text_edits) do
             local srow = te.range.start.line + 1
             local erow = te.range['end'].line + 1
@@ -338,10 +338,10 @@ core.confirm = function(self, e, option, callback)
         if has_cursor_line_text_edit then
           return
         end
-        vim.fn['cmp#apply_text_edits'](new.bufnr, text_edits)
+        vim.lsp.util.apply_text_edits(text_edits, ctx.bufnr)
       end)
     else
-      vim.fn['cmp#apply_text_edits'](vim.api.nvim_get_current_buf(), e:get_completion_item().additionalTextEdits)
+      vim.lsp.util.apply_text_edits(e:get_completion_item().additionalTextEdits, ctx.bufnr)
     end
   end)
   feedkeys.call('', 'n', function()
@@ -371,7 +371,7 @@ core.confirm = function(self, e, option, callback)
       if is_snippet then
         completion_item.textEdit.newText = ''
       end
-      vim.fn['cmp#apply_text_edits'](ctx.bufnr, { completion_item.textEdit })
+      vim.lsp.util.apply_text_edits({ completion_item.textEdit }, ctx.bufnr)
       local texts = vim.split(completion_item.textEdit.newText, '\n')
       local position = completion_item.textEdit.range.start
       position.line = position.line + (#texts - 1)