md-tools.nvim/plugin/init.lua

if vim.fn.exists("g:loaded_md-tools") == 0 then
    local user_cmd = vim.api.nvim_create_user_command

    user_cmd("HeaderPromote", function (opts)
        require("md-tools").headerControl('promote')
    end, {})

    user_cmd("HeaderDemote", function (opts)
        require("md-tools").headerControl('demote')
    end, {})

    vim.api.nvim_set_var("loaded_md-tools", true)
end