Haha, I feel like this quote from the second post is highly relatable for anyone who's done any graphics programming (or... any linear algebra for that matter):
"The only issue I ran into is that the tangent.w always came out with the wrong sign compared to the existing mikktspace-tangents I had as a reference. I double checked my math and coordinate space handiness a couple of times, but could never figure out what was wrong. I ended up just inverting the sign after calculating the tangent. If anyone knows what I did wrong, please open an issue!"
"The only issue I ran into is that the tangent.w always came out with the wrong sign compared to the existing mikktspace-tangents I had as a reference. I double checked my math and coordinate space handiness a couple of times, but could never figure out what was wrong. I ended up just inverting the sign after calculating the tangent. If anyone knows what I did wrong, please open an issue!"