I am with Starsky that it is best to make yourself scarce for a while to allow the pair of you to process the emotions and discussions in the car.
Wow. Amazing new developments in your sitch.
My dear Puppy aka Starsky (he'll always be Puppy to me :)) and I will be happy to let you lean on us for support!
What I would urge you to be very mindful is not to trot out the "boundary" nor lay out "conditions" for it would feel too restrictive for H and he would not feel welcome back home. You wouldn't want to be too heavy-handed in this phase of the reconciliation process. The focus is maintain the separation for the time being for it FORCES you to truly communicate your fears, concerns, thoughts, hopes, and dreams about this "new" reconciliation.
Another important factor is to drop the scorekeeping card. Who likes that?!! Not me. The past has passed. What you can do is to learn how YOU would handle things differently and how you'd react to events in a much more balanced way.
You want to be a true partner to your H in a loving and supportive way. You and the home should be a sanctuary from the storms of the outside world.
I think in this phase it would appear that you and H are "rediscovering" each other and seeing each other in a new light. Look at H as a new date that you'd like to learn about all over again with beginner's set of eyes.
Why not play the 20-question game the next time you see H? Or introduce yourself as a different name with an alter ego. That would be fun!
Be sure to insert creativity and playful scenarios with H in order to recapture the magic as you two re-build a new marriage together.
