Unless otherwise provided in these rules, no agreement between attorneys or parties touching any suit pending will be enforced unless it be in writing, signed and filed with the papers as part of the record, or unless it be made in open court and entered of record.
Tex. R. Civ. P. 11
Notes and Comments
Comment to 1988 change: The amendment makes it clear that Rule 11 is subject to modification by any other Rule of Civil Procedure.