By previewing the seeds I meant actually opening the save file with a text editor and reading it to see what you rolled. Seems like it would fall under using outside tools, but I wasn't sure since the game itself isn't modified. Also, I had thought at first that this would be doable before hitting "Play Game", but it looks like the game doesn't actually choose what you roll until the first cutscene, so this would have to be done mid run.

However, it'd be pretty hard to detect since someone could just alt tab out and check if they rolled what they wanted in a matter of seconds. I built a website that does this a few days ago. https://hzla.github.io/Remnant-World-Analyzer/

What are the rules regarding checking the save file before the run starts to preview bosses and map layouts?