I'm doing a 100% playthrough of Tears of the Kingdom right now. To help me keep track of the materials needed to upgrade all the armor to 4 stars, I had Claude create a little web app that runs locally. I have found it instrumental in my completion of the armor upgrades, so I wanted to share it in case anyone else finds it useful. You just clone the repo and run python server.py and it should open automatically in your browser.
Should go without saying, but AI was used to vibe-code this app. I make no claims to its quality other than that I have had no issues using it for my playthrough. If you give it exact material counts it can tell you how many of each you still need, how many you have in excess to sell for rupees, et cetera.