return function()
  -- Use Zathura as the PDF viewer
  vim.g.vimtex_view_method = "zathura"

  -- Compile using latexmk automatically
  vim.g.vimtex_compiler_method = "latexmk"
  vim.g.vimtex_compiler_latexmk = {
    build_dir = "build",       -- Keep files in a separate folder
    callback = 1,
    continuous = 1,            -- Automatically recompile on save
    executable = "latexmk",
    options = {
      "-pdf",
      "-interaction=nonstopmode",
      "-synctex=1",
    },
  }

  -- Auto hard-wrap at 80 columns for .tex files
  vim.api.nvim_create_autocmd("FileType", {
    pattern = "tex",
    callback = function()
      vim.opt_local.textwidth = 80
      vim.opt_local.formatoptions:append("t")
    end,
  })

  -- Optional: disable conceal for clearer LaTeX text
  vim.g.vimtex_syntax_conceal = {
    accents = 0,
    ligatures = 0,
    cites = 0,
    fancy = 0,
    spacing = 0,
    greek = 0,
    math_delimiters = 0,
    math_super_sub = 0,
  }
end