return {
  "hrsh7th/nvim-cmp",
  event = "InsertEnter",
  dependencies = {
    "hrsh7th/cmp-nvim-lsp",
    "hrsh7th/cmp-buffer",
    "hrsh7th/cmp-path",
    "L3MON4D3/LuaSnip",
    "zbirenbaum/copilot-cmp", -- Copilot completion source
  },
  opts = function()
    local cmp = require("cmp")
    local luasnip = require("luasnip")

    return {
      snippet = {
        expand = function(args)
          luasnip.lsp_expand(args.body)
        end,
      },
      mapping = cmp.mapping.preset.insert({
        ["<C-Space>"] = cmp.mapping.complete(),
        ["<CR>"] = cmp.mapping.confirm({ select = true }), -- Auto-select first item
        ["<C-n>"] = cmp.mapping.select_next_item(),
        ["<C-p>"] = cmp.mapping.select_prev_item(),
        ["<C-e>"] = cmp.mapping.abort(),
      }),
      sources = cmp.config.sources({
        { name = "copilot", group_index = 2 }, -- Copilot suggestions (priority 1)
        { name = "nvim_lsp", group_index = 2 },
        { name = "path", group_index = 2 },
        { name = "buffer", group_index = 2 },
      }),
      completion = { completeopt = "menu,menuone,noinsert" }, -- Auto-select first item
    }
  end,
  config = function(_, opts)
    require("cmp").setup(opts)
  end,
}