return {
    -- tab line
    "akinsho/bufferline.nvim",
    version = "*",
    dependencies = "nvim-tree/nvim-web-devicons",
    config = function()
        local bufferline = require("bufferline")
        bufferline.setup({
            options = {
                mode = "buffers",
                show_buffer_close_icons = false,
                middle_mouse_command = "bdelete! %d",
                indicator = { style = "underline" },
                offsets = {
                    {
                        filetype = "NvimTree",
                        text = " ",
                        text_align = "center",
                        separator = true,
                    },
                },

                separator_style = { " ", " " },
                diagnostics = "nvim_lsp",
                diagnostics_indicator = function(count, level, diagnostics_dict, context)
                    local icon = level:match("error") and "󰅚 " or "󰀪 "
                    return icon .. count
                end,
            },
        })

        local opts = { silent = true }
        -- go to buffer
        opts.desc = "go to buffer 1"
        vim.keymap.set("n", "g1", "<Cmd>BufferLineGoToBuffer 1<CR>", opts)
        opts.desc = "go to buffer 2"
        vim.keymap.set("n", "g2", "<Cmd>BufferLineGoToBuffer 2<CR>", opts)
        opts.desc = "go to buffer 3"
        vim.keymap.set("n", "g3", "<Cmd>BufferLineGoToBuffer 3<CR>", opts)
        opts.desc = "go to buffer 4"
        vim.keymap.set("n", "g4", "<Cmd>BufferLineGoToBuffer 4<CR>", opts)
        opts.desc = "go to buffer 5"
        vim.keymap.set("n", "g5", "<Cmd>BufferLineGoToBuffer 5<CR>", opts)
        opts.desc = "go to buffer 6"
        vim.keymap.set("n", "g6", "<Cmd>BufferLineGoToBuffer 6<CR>", opts)
        opts.desc = "go to buffer 7"
        vim.keymap.set("n", "g7", "<Cmd>BufferLineGoToBuffer 7<CR>", opts)
        opts.desc = "go to buffer 8"
        vim.keymap.set("n", "g8", "<Cmd>BufferLineGoToBuffer 8<CR>", opts)
        opts.desc = "go to buffer 9"
        vim.keymap.set("n", "g9", "<Cmd>BufferLineGoToBuffer 9<CR>", opts)
        opts.desc = "go to buffer 10"
        vim.keymap.set("n", "g0", "<Cmd>BufferLineGoToBuffer 10<CR>", opts)
        opts.desc = nil
        -- cycle between buffers
        vim.keymap.set("n", "J", "<cmd>BufferLineCyclePrev<CR>", opts)
        vim.keymap.set("n", "K", "<cmd>BufferLineCycleNext<CR>", opts)
        -- move buffers
        vim.keymap.set("n", "<C-S-J>", "<cmd>BufferLineMovePrev<CR>", opts)
        vim.keymap.set("n", "<C-S-K>", "<cmd>BufferLineMoveNext<CR>", opts)
        -- go to previous buffer
        vim.keymap.set({ "n", "i" }, "<C-Tab>", "<cmd>b#<CR>", opts)
    end,
}