The relating of the events of the Exodus on the night of 15 Nissan is a Torah-command. But the precise wording of the Haggadah is not prescribed in the Torah. In very ancient times, each family could be relied upon to do so properly. After the First destruction, when knowledge had decreased, the sages set certain parameters for the Haggadah; and its main portion was finalized in its present form in Yavneh, some 1900 years ago. Some minor portions, like a few of the songs at the end, were added later.
It is not known for certain who authored the Haggadah.
The Haggadah contains the service for the seder.
Moses is never directly mentioned in the Haggadah.
Eugen Verber has written: 'The Sarajevo Haggadah' -- subject(s): Haggadah, Illustrations, Jewish Illumination of books and manuscripts, Sarajevo Haggadah
It's mostly Orthodox rabbis who are multi-generational rabbis.
haggadah
Seder
Rabbis are men. They do not get pregnant.
I believe rabbis CAN be scribes.
Mordekhai Elon has written: 'The Tekhelet Mordekhai Haggadah' -- subject(s): Haggadah, Judaism, Liturgy, Seder
Keshet Rabbis was created in 2003.
No, there are female rabbis, even amongst the Orthodox. (Orthodox female rabbis aren't pulpit rabbis.)