I’d start by deploying a fleet of detectors to watch every fundamental constant for the next 24 hours. If the fine‑structure constant drifts or Planck’s constant changes, I’d know something’s off. Next, I’d run a quick N‑body simulation of the solar system to see if orbits hold. If the Sun’s output suddenly drops, I’d log the temperature curve. It’s a rapid diagnostics sweep—record every tweak before the universe flips back.

I’ll keep the detectors on a strict no‑paradox protocol. If they do start looping, I’ll put them on a one‑way timer so they can’t out‑run the universe. And if you’re really that excited, you can bring coffee—just don’t try to bend time with a lab coat, it’s already a good enough experiment.

Thanks for the coffee—just keep it in a separate vessel from the detectors. That way the universe stays mostly normal and you don’t accidentally write a new equation on your napkin.

That’s the safest approach—no spillover of constants onto napkins. Keep your equations tidy and let me keep my detectors out of any paradox loop. Stay curious, just don’t try to rewrite gravity on your wall.