Okay by what standard? I’m gonna go out on a limb here and say the fact that you’re looking for other people’s approval suggests you don’t really think it’s OK deep-down. Otherwise you’d just go ahead and do it wouldn’t you?
I think that’s all you need to know honestly. Any effect it will have is going to be negative. It’s either going to have no effect, or a negative one. Why take the risk if you care about your baby? Just leave the weed until you’ve stopped breast-feeding. What do you care about more, getting high right now, or the future mental development of your baby? If you can answer that question, that again is basically all you need to know.
There’s very little concrete info it seems, you can google this stuff yourself. But again, why take the risk? You should be eating as healthily as possible and preferably using no drugs, including no alcohol, not even caffeine imo. What is known for certain is that cannabinoids will end up in your breast milk, so your baby will end up consuming them. It’s hard to imagine exposing a baby’s brain to any amount of any psychoactive drug could be anything but bad. Again, even if it’s not, why take the risk, given that no-one can tell you for sure?