If you propose to dissolve your marriage by divorce o the grounds of mutual consent, then you both may draw a memorandum of understanding to be attached to the divorce decree.
In the MOU ther terms about the child custody, visitation rights to the father, funds for the education of the child etc may be reduced to writing in the MOU.
Further the rights to the mother to take the child to foreign country also may be decided or else the biological father may be advised to give his NOC for this purpose.
All such things which need to be taken care of the future interests may be mutually agreed as terms and condition for divorce on mutual consent in the MOU.