return {
  -- auto-tag
  {
    "windwp/nvim-ts-autotag",
    config = function()
      require("nvim-ts-autotag").setup()
    end,
  },

  -- auto-pairs
  {
    "windwp/nvim-autopairs",
    config = function()
      require("nvim-autopairs").setup {
        enable_check_bracket_line = false,
        ignored_next_char = "[%w%.]", -- will ignore alphanumeric and `.` symbol
      }
    end,
  },

  -- auto completion
  {
    "hrsh7th/nvim-cmp",
    config = function()
      require "plugins/autocmp/config"()
    end,
  },
  { "hrsh7th/cmp-nvim-lsp" },
  { "hrsh7th/cmp-buffer" },
  { "hrsh7th/cmp-path" },
  { "hrsh7th/cmp-cmdline" },

  { "L3MON4D3/LuaSnip" }, -- install the LuaSnip engine

  { "onsails/lspkind.nvim" }, -- icons in autocomplete source

  -- todo comments
  -- Preview
  -- TODO: todo
  -- FIX: fix
  -- WARNING: warning
  -- HACK: hack
  -- NOTE: note
  -- PERF: perf
  -- TEST: test
  --
  {
    "folke/todo-comments.nvim",
    dependencies = { "nvim-lua/plenary.nvim" },
    config = function()
      require("todo-comments").setup {
        keywords = {
          FIX = {
            icon = " ", -- icon used for the sign, and in search results
            color = "error", -- can be a hex color, or a named color (see below)
            alt = { "FIXME", "BUG", "FIXIT", "ISSUE" }, -- a set of other keywords that all map to this FIX keywords
            -- signs = false, -- configure signs for some keywords individually
          },
          TODO = { icon = " ", color = "todo" },
          HACK = { icon = " ", color = "warning" },
          WARN = { icon = " ", color = "warning", alt = { "WARNING", "XXX" } },
          PERF = { icon = "󱢍", alt = { "OPTIM", "PERFORMANCE", "OPTIMIZE" } },
          NOTE = { icon = " ", color = "info", alt = { "INFO" } },
          TEST = { icon = "⏲ ", color = "test", alt = { "TESTING", "PASSED", "FAILED" } },
        },
        colors = {
          error = { "DiagnosticError", "ErrorMsg", "#DC2626" },
          warning = { "DiagnosticWarn", "WarningMsg", "#FBBF24" },
          todo = { "DiagnosticOk", "#2563EB" },
          info = { "DiagnosticInfo", "#10B981" },
          default = { "Identifier", "#7C3AED" },
          test = { "Identifier", "#FF00FF" },
        },
      }
    end,
  },

  -- guess indent
  {
    "nmac427/guess-indent.nvim",
    config = function()
      require("guess-indent").setup {}
    end,
  },
}