return {
	"nvim-treesitter/nvim-treesitter",
	dependencies = { "windwp/nvim-ts-autotag", "JoosepAlviste/nvim-ts-context-commentstring" },
	init = function()
		U.cmd_executable("tree-sitter", {
			[false] = function()
				vim.notify("tree-sitter not installed, code syntax will be broken.", 2)
			end,
		})
	end,
	event = "BufRead",
	cmd = {
		"TSBufDisable",
		"TSBufEnable",
		"TSBufToggle",
		"TSDisable",
		"TSEnable",
		"TSToggle",
		"TSInstall",
		"TSInstallInfo",
		"TSInstallSync",
		"TSModuleInfo",
		"TSUninstall",
		"TSUpdate",
		"TSUpdateSync",
	},
	opts = function()
		local nonNixOpts = {}
		if not NIX then
			nonNixOpts = {
				ensure_installed = "all",
				auto_install = true,
			}
		end
		return U.assign({
			highlight = {
				enable = true,
				use_languagetree = true,
				disable = function(lang, bufnr)
					if lang == "sql" then
						return true
					end
					return vim.api.nvim_buf_line_count(bufnr) > 4000
				end,
				additional_vim_regex_highlighting = false,
			},
			incremental_selection = { enable = true },
			ident = { enable = true },
			autotag = { enable = true },
			rainbow = {
				enable = true,
				extended_mode = true,
				max_file_lines = nil,
			},
		}, nonNixOpts)
	end,
	config = function(_, opts)
		require("nvim-treesitter.configs").setup(opts)
	end,
}