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",
    },
    config = function()
        local cmp = require("cmp")

        cmp.setup({
            snippet = {
                expand = function(args)
                    require("luasnip").lsp_expand(args.body)
                end,
            },
            window = {
                completion = cmp.config.window.bordered(),
                -- documentation = cmp.config.window.bordered(),
            },
            mapping = cmp.mapping.preset.insert({
                ["<C-b>"] = cmp.mapping.scroll_docs(-4),
                ["<C-f>"] = cmp.mapping.scroll_docs(4),
                ["<C-e>"] = cmp.mapping.abort(),
                ["<CR>"] = cmp.mapping.confirm({ select = false }),
            }),
            sources = cmp.config.sources({
                { name = "nvim_lsp" },
                { name = "luasnip" },
            }, {
                { name = "buffer" },
            }),
        })

        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,
}