Is this a known tech or does this need to be explored more? It looks like it's reproduceable.

This is news to me, if you can figure out how reproduce it that'd be beyond useful for runs.

this is already known but I can't do it myself. That's why I don't do it in runs. it's called edge glide by the way

It's called edge gliding or wall gliding, it's where your character is on the edge and you slightly drop down to do do a wire kunai off the ledge and go forward, it makes you in that stance. I made a tutorial about it, in fact:

I named it Edge Gliding Because There is also Regular Gliding, Which I just call Gliding, tho that doesn't Have a Tutorial, here is the Original Edge Gliding Tutorial, Hope it helps

This looks very helpful! I’ll keep it in mind.