return {
	"nvimtools/none-ls.nvim",
	config = function()
		local group = vim.api.nvim_create_augroup("lsp_format_on_save", { clear = false })
		local event = "BufWritePre" -- or "BufWritePost"
		local async = event == "BufWritePost"

		require("null-ls").setup({
			on_attach = function(client, bufnr)
				if client.supports_method("textDocument/formatting") then
					vim.keymap.set("n", "<Leader>f", function()
						vim.lsp.buf.format({ bufnr = vim.api.nvim_get_current_buf() })
					end, { buffer = bufnr, desc = "[lsp] format" })

					-- format on save
					vim.api.nvim_clear_autocmds({ buffer = bufnr, group = group })
					vim.api.nvim_create_autocmd(event, {
						buffer = bufnr,
						group = group,
						callback = function()
							vim.lsp.buf.format({ bufnr = bufnr, async = async })
						end,
						desc = "[lsp] format on save",
					})
				end

				if client.supports_method("textDocument/rangeFormatting") then
					vim.keymap.set("x", "<Leader>f", function()
						vim.lsp.buf.format({ bufnr = vim.api.nvim_get_current_buf() })
					end, { buffer = bufnr, desc = "[lsp] format" })
				end
			end,
		})
	end,
}