return {
  {
    "nvim-treesitter/nvim-treesitter",
    opts = function(_, opts)
      if type(opts.ensure_installed) == "table" then
        vim.list_extend(opts.ensure_installed, {
          "nix",
        })
      end
      opts.indent = {
        enable = true,
        disable = { "python", "yaml" },
      }
    end,
  },
  {
    "neovim/nvim-lspconfig",
    ---@class PluginLspOpts
    init = function()
      local keys = require("lazyvim.plugins.lsp.keymaps").get()
      local function swap_prefix(before, after)
        for _, keymap in ipairs(keys) do
          local key = keymap[1]
          if key:sub(1, #before) == before then
            keymap[1] = after .. key:sub(#before + 1)
          end
        end
      end

      local leader_c = "<leader>c"
      local leader_l = "<leader>l"
      swap_prefix(leader_c, leader_l)
      require("which-key").register({
        [leader_c] = "pkgs",
        [leader_l] = "code",
      })

      keys[#keys + 1] = { "gl", vim.diagnostic.open_float, "Line Diagnostics" }
    end,
    opts = {
      diagnostics = { underline = false, update_in_insert = true },
      inlay_hints = { enabled = true },
      autoformat = false,
      ---@type lspconfig.options
      servers = {
        lua_ls = {
          ---@type LazyKeys[]
          settings = {
            Lua = { telemetry = { enabled = false } },
          },
        },
      },
      setup = {
        ltex = function(_, opts)
          vim.api.nvim_create_autocmd("LspAttach", {
            callback = function(args)
              local client = vim.lsp.get_client_by_id(args.data.client_id)
              if client.name == "ltex" then
                require("ltex_extra").setup({
                  load_langs = { "en-GB" }, -- languages for witch dictionaries will be loaded
                  init_check = true, -- whether to load dictionaries on startup
                  path = vim.fn.stdpath("data") .. "/spell", -- path to store dictionaries.
                })
              end
            end,
          })
        end,
      },
    },
  },
  {
    "williamboman/mason.nvim",
    opts = function(_, opts)
      if type(opts.ensure_installed) == "table" then
        vim.list_extend(opts.ensure_installed, {
          -- lsp
          "deno",
          "nil",
          "ltex-ls",
          "marksman",
          "yaml-language-server",
          "elixir-ls",
          -- linter
          "yamllint",
          "jsonlint",
        })
      end
    end,
  },

  {
    "hrsh7th/nvim-cmp",
    dependencies = {
      "hrsh7th/cmp-emoji",
    },
    ---@param opts cmp.ConfigSchema
    opts = function(_, opts)
      local has_words_before = function()
        unpack = unpack or table.unpack
        local line, col = unpack(vim.api.nvim_win_get_cursor(0))
        return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil
      end

      local luasnip = require("luasnip")
      local cmp = require("cmp")

      opts.experimental.ghost_text = false
      opts.mapping = vim.tbl_extend("force", opts.mapping, {
        ["<M-j>"] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Insert }),
        ["<M-k>"] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Insert }),
        ["<M-p>"] = cmp.mapping.scroll_docs(-4),
        ["<M-n>"] = cmp.mapping.scroll_docs(4),
        ["<Tab>"] = cmp.mapping(function(fallback)
          if cmp.visible() then
            -- You could replace select_next_item() with confirm({ select = true }) to get VS Code autocompletion behavior
            cmp.select_next_item()
          -- You could replace the expand_or_jumpable() calls with expand_or_locally_jumpable()
          -- this way you will only jump inside the snippet region
          elseif luasnip.expand_or_jumpable() then
            luasnip.expand_or_jump()
          elseif has_words_before() then
            cmp.complete()
          else
            fallback()
          end
        end, { "i", "s" }),
        ["<S-Tab>"] = cmp.mapping(function(fallback)
          if cmp.visible() then
            cmp.select_prev_item()
          elseif luasnip.jumpable(-1) then
            luasnip.jump(-1)
          else
            fallback()
          end
        end, { "i", "s" }),
      })
    end,
  },
  {
    "echasnovski/mini.surround",
    opts = {
      mappings = {
        add = "gsa",
        delete = "gsd",
        find = "gsf",
        find_left = "gsF",
        highlight = "gsh",
        replace = "gsr",
        update_n_lines = "gsn",
      },
    },
  },
  {
    "simrat39/rust-tools.nvim",
    opts = {
      tools = { inlay_hints = { auto = false } },
    },
  },
  {
    "lervag/vimtex",
    config = function()
      vim.g.vimtex_mappings_enabled = 0
    end,
  },
  {
    "barreiroleo/ltex_extra.nvim",
    dependencies = { "neovim/nvim-lspconfig" },
    -- opts = {
    --   load_langs = { "en-GB" },
    --   path = vim.fn.stdpath("data") .. "/dictionary",
    -- },
  },
  {
    "iamcco/markdown-preview.nvim",
    build = "cd app && npm install",
    setup = function()
      vim.g.mkdp_filetypes = { "markdown" }
    end,
    ft = { "markdown" },
  },
}