return {
  "hrsh7th/nvim-cmp",
  event = "InsertEnter", -- Only load when entering insert mode for performance
  dependencies = {
    -- Snippet engine (REQUIRED by cmp)
    { "L3MON4D3/LuaSnip", dependencies = { "saadparwaiz1/cmp_luasnip" } },

    -- Sources for completion
    "hrsh7th/cmp-nvim-lsp", -- LSP suggestions
    "hrsh7th/cmp-buffer",    -- Buffer words
    "hrsh7th/cmp-path",      -- File system paths
    "hrsh7th/cmp-cmdline",   -- Command line completion (if you want it)

    -- You can add more sources here, e.g., 'hrsh7th/cmp-vsnip', 'ray-x/cmp-treesitter'
  },
  config = function()
    -- Set up nvim-cmp
    local cmp = require("cmp")
    local luasnip = require("luasnip")

    cmp.setup({
      snippet = {
        -- REQUIRED - sets the snippet engine nvim-cmp uses
        expand = function(args)
          luasnip.lsp_expand(args.body)
        end,
      },
      mapping = cmp.mapping.preset.insert({
        ["<C-b>"] = cmp.mapping.scroll_docs(-4),
        ["<C-f>"] = cmp.mapping.scroll_docs(4),
        ["<C-Space>"] = cmp.mapping.complete(),
        ["<CR>"] = cmp.mapping.confirm({ select = true }), -- Accept selected item.
        ["<Tab>"] = cmp.mapping(function(fallback)
          if cmp.visible() then
            cmp.select_next_item()
          -- Use <Tab> to jump to the next snippet placeholder
          elseif luasnip.expand_or_jumpable() then
            luasnip.expand_or_jump()
          else
            fallback()
          end
        end, { "i", "s" }),
        ["<S-Tab>"] = cmp.mapping(function(fallback)
          if cmp.visible() then
            cmp.select_prev_item()
          -- Use <S-Tab> to jump to the previous snippet placeholder
          elseif luasnip.jump_backward() then
            luasnip.jump_backward()
          else
            fallback()
          end
        end, { "i", "s" }),
      }),
      sources = cmp.config.sources({
        { name = "nvim_lsp" }, -- LSP suggestions
        { name = "luasnip" },  -- Snippet source
      }, {
        { name = "buffer" },   -- Buffer words
        { name = "path" },     -- File system paths
      }),
    })

    -- Optional: Configure for command line completion
    cmp.setup.cmdline(":", {
      mapping = cmp.mapping.preset.cmdline(),
      sources = cmp.config.sources({
        { name = "path" },
      }, {
        { name = "cmdline" },
      }),
    })
  end,
}