any
oral or written communication prepared or expressed for the purposes of, in the course of, or pursuant to, any
mediation services proceeding or dispute resolution program proceeding, including, but not limited to, any memoranda, notes, records, or work product of a mediator,
mediation organization, or party; except that a written
agreement to enter into a
mediation service proceeding or dispute resolution proceeding, or a final written
agreement reached as a result of a
mediation service proceeding or dispute resolution proceeding, which has been fully executed, is not a
mediation communication unless otherwise agreed upon by the parties.