return {
	"hrsh7th/nvim-cmp",
	lazy = false,
	dependencies = {
		-- base
		"hrsh7th/cmp-nvim-lsp",
		"hrsh7th/cmp-buffer",
		"hrsh7th/cmp-path",
		"hrsh7th/cmp-cmdline",
		-- snippets
		"L3MON4D3/LuaSnip",
		"saadparwaiz1/cmp_luasnip",
	},
	opts = function()
		local cmp = require("cmp")

		return {
			window = {
				completion = cmp.config.window.bordered(),
			},
			snippet = {
				expand = function(args)
					require("luasnip").lsp_expand(args.body)
				end,
			},
			sources = {
				{ name = "nvim_lsp", priority = 2 },
				{ name = "luasnip",  priority = 1 },
				{ name = "buffer" },
			},
		}
	end,
	keys = {
		{ "<C-b>", function() require("cmp").mapping.scroll_docs(-4) end },
		{ "<C-f>", function() require("cmp").mapping.scroll_docs(4) end },
		{ "<C-e>", function() require("cmp").mapping.abort() end },
		{ "<CR>", function() require("cmp").mapping.confirm({ select = false }) end },
	},
	init = function()
		local cmp = require("cmp")

		vim.api.nvim_create_autocmd("BufRead", {
			group = vim.api.nvim_create_augroup("CmpSourceCargo", { clear = true }),
			pattern = "Cargo.toml",
			callback = function()
				cmp.setup.buffer({ sources = { { name = "crates" } } })
			end,
		})

		-- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won"t work anymore).
		cmp.setup.cmdline({ "/", "?" }, {
			mapping = cmp.mapping.preset.cmdline(),
			sources = {
				{ name = "buffer" },
			},
		})

		-- Use cmdline & path source for ":" (if you enabled `native_menu`, this won"t work anymore).
		cmp.setup.cmdline(":", {
			mapping = cmp.mapping.preset.cmdline(),
			sources = cmp.config.sources({
				{ name = "path" },
			}, {
				{ name = "cmdline" },
			}),
		})
	end,
}