I have learned:
when avijja ends abhisankhara’s end. These are volition formations like urges, impetus, and can be meritorious and demeritorious. They are in our make-up, part of what you have accumulated in this and former lives.
But sankhara’s, mano, vaci and kaya sankhara’s keep being produced by the mind while avijja is gone. They regulate the thinking, speaking and acting which goes via the brain. For example, without kaya sankhara there would be no breathing, without vaci sankhara there would be no speaking for us and inner speech.
When there are from within no urges anymore, no floodings, no anusaya become active, there does not arise any vinnana with urge, a kamma-vinnana, the third factor. But there still arise sense vinnana’s.
There remains sense contacts but this is not ignorant-contact anymore, no defiled sense contact, no samphassa, there is only phassa. So the sense contacts are without attraction and repulsion. There is no urge, no anusaya active while there is sense-contact. There is no greed, hate and delusion in the sense-contact.
Vedana’s still arise but only dukkha, sukha and neutral vedana’s which always accompony sense-contacts. There seems to be no sense contact without vedana.
There are no mind-made vedana’s, no dark vedana’s, domanassa, nor somanassa vedana’s.
These are feelings that accompony mental reactions on sense-contact, such as like and dislike.
If the mind chooses for a reaction of dislike on sense-contact, a dark feeling arises. Those feeling accomponing such reactions do not arise anymore.
No tanha does arise, no upadana if avijja is totally gone. But like greed and hate, avijja also weakens gradually. It is not on/of. Even an anagami is not totally free of avijja. It is not that like a sotapanna is already without avijja. Buddha said that only one without any defilement is really without avijja.
There is not extra kamma accumulated.
There will be no next birth. Only future suffering is totally ended. During this life one still has to face the discomforts which are inherent to being born a human, and having a human make-up.
The Nibbana embodied by an arhant is not without nidana’s.
It is said, any PS cycle starts with sense-contact. So, although aviija is listed above, it does not mean that avijja is the first chain. There is no first nidana in PS.