diff --git a/coc-settings.json b/coc-settings.json
index 1248d26..d59239f 100644
--- a/coc-settings.json
+++ b/coc-settings.json
@@ -1,6 +1,6 @@
 {
   "codeLens.enable": true,
-  "codeLens.position": "eol",
+  "codeLens.position": "right_align",
   "coc.preferences.extensionUpdateCheck": "daily",
   "coc.preferences.enableMessageDialog": true,
   "coc.preferences.formatOnType": true,
@@ -18,25 +18,20 @@
     "jsonc"
   ],
   "coc.source.file.ignoreHidden": false,
-  "clangd.path": "~/bin/clangd",
-  "clangd.arguments": [
-    "--query-driver=/usr/bin/clang++",
-    "--header-insertion-decorators=false",
-    "--background-index"
-  ],
-  "deno.importMap": "./import_map.json",
   "diagnostic.floatConfig": {
     "rounded": true,
     "border": true
   },
-  "diagnostic.format": "%message [%source]",
+  "diagnostic.format": "[%severity] %message [%source]",
   "diagnostic.virtualText": true,
+  "diagnostic.level": "hint",
   "diagnostic.checkCurrentLine": true,
   "diagnostic.separateRelatedInformationAsDiagnostics": true,
   "eslint.autoFixOnSave": true,
   "eslint.format.enable": true,
   "eslint.packageManager": "yarn",
   "git.addGBlameToVirtualText": true,
+  "git.blameUseRealTime": true,
   "hover.floatConfig": {
     "rounded": true,
     "border": true
@@ -47,24 +42,17 @@
   "list.insertMappings": {
     "<C-c>": "do:exit"
   },
-  "list.source.grep.useLiteral": false,
-  "list.source.grep.defaultArgs": [
-    "--ignore-case"
-  ],
-  "markdownlint.config": {
-    "default": true,
-    "line-length": false
-  },
-  "python.formatting.provider": "autopep8",
+  "python.formatting.provider": "yapf",
   "python.linting.enabled": true,
   "python.analysis.diagnosticMode": "workspace",
   "python.linting.pylintEnabled": false,
   "python.linting.flake8Enabled": true,
-  "python.linting.pycodestyle": true,
   "python.linting.pylamaEnabled": true,
   "python.linting.banditEnabled": true,
+  "python.linting.pycodestyleEnabled": true,
   "python.linting.mypyEnabled": false,
   "python.linting.pytypeEnabled": true,
+  "python.analysis.typeCheckingMode": "basic",
   "semanticTokens.enable": true,
   "signature.target": "echo",
   "suggest.detailField": "abbr",
@@ -79,31 +67,13 @@
     "rounded": true,
     "border": true
   },
-  "sumneko-lua.enableNvimLuaDev": true,
-  "Lua.completion.callSnippet": "Both",
-  "Lua.completion.postfix": ".",
-  "Lua.runtime.version": "LuaJIT",
-  "Lua.telemetry.enable": false,
-  "Lua.diagnostics.globals": [
-    "vim",
-    "jit"
-  ],
   "snippet.choicesMenuPicker": true,
-  "snippets.ultisnips.enable": false,
-  "snippets.extends": {
-    "javascriptreact": [
-      "javascript"
-    ],
-    "typescript": [
-      "javascript"
-    ]
-  },
   "languageserver": {
-      "bash": {
-        "command": "bash-language-server",
-        "args": ["start"],
-        "filetypes": ["sh"]
-  }
-},
-"git.enableGutters": true
+    "bash": {
+      "command": "bash-language-server",
+      "args": ["start"],
+      "filetypes": ["sh"]
+    }
+  },
+  "git.enableGutters": true
 }
diff --git a/init.vim b/init.vim
index 3120c0e..7b483d3 100644
--- a/init.vim
+++ b/init.vim
@@ -4,6 +4,7 @@ call plug#begin()
 Plug 'kyazdani42/nvim-web-devicons' " optional, for file icons
 Plug 'kyazdani42/nvim-tree.lua'
 
+Plug 'vim-perl/vim-perl', { 'for': 'perl', 'do': 'make clean carp dancer highlight-all-pragmas moose test-more try-tiny' }
 Plug 'neoclide/coc.nvim', {'branch': 'release'}
 Plug 'preservim/nerdcommenter'
 Plug 'mhinz/vim-startify'
@@ -16,6 +17,8 @@ Plug 'vim-airline/vim-airline-themes'
 Plug 'honza/vim-snippets'
 Plug 'itchyny/vim-cursorword'
 Plug 'sheerun/vim-polyglot'
+
+" themes
 Plug 'navarasu/onedark.nvim'
 Plug 'ellisonleao/gruvbox.nvim'
 Plug 'dracula/vim'
@@ -51,8 +54,12 @@ nnoremap <C-e> :NvimTreeFindFile<CR>
 nmap <C-_> <plug>NERDCommenterToggle
 vmap <C-_> <plug>NERDCommenterToggle
 
+" saving with Ctrl+s
+nnoremap <silent><C-s> :update<cr>
+inoremap <silent><C-s> <c-o>:update<cr>
+vnoremap <silent><c-s> <c-c>:update<cr>gv " gv to preserve visual selection
 " show uncommited git changes in current part of the code
-nnoremap <C-s> :CocCommand git.chunkInfo<CR>
+nnoremap <C-g> :CocCommand git.chunkInfo<CR>
 
 "theme configuration
 syntax enable