Do you have constraint of "face to"?

[YandanYang]

The existing constraints in your code includes:

on_floor = cl.StableAgainst(bottom, floortags, margin=0.01)
flush_wall = cl.StableAgainst(back, walltags, margin=0.02)
against_wall = cl.StableAgainst(back, walltags, margin=0.07)
spaced_wall = cl.StableAgainst(back, walltags, margin=0.8)
hanging = cl.StableAgainst(top, ceilingtags, margin=0.05)
side_against_wall = cl.StableAgainst(side, walltags, margin=0.05)

ontop = cl.StableAgainst(bottom, top)
on = cl.StableAgainst(bottom, {t.Subpart.SupportSurface})

front_against = cl.StableAgainst(
    front, side, margin=0.05, check_z=False
) 

front_to_front = cl.StableAgainst(front, front, margin=0.05, check_z=False)

leftright_leftright = cl.StableAgainst(leftright, leftright, margin=0.05)  
side_by_side = cl.StableAgainst(side, side)
back_to_back = cl.StableAgainst(back, back)

back_coplanar_back = cl.CoPlanar(back, back, margin=0.05, rev_normal=True)
front_coplanar_front = cl.CoPlanar(front, front, margin=0.05, rev_normal=True)

It does not include relation like face to, which does not need margin and has different goal from StableAgainst.
Will you implement this relation in the future? May I ask about the time?