Interaction-Invariant Physics: Foundations Without Space or Time

We usually start physics with space, time, particles, or laws. This work starts earlier.

It asks a simpler question: what has to survive interaction for any theory of reality to make sense at all?

This is not a new physical theory. It’s a framework for deciding when theories are admissible — before spacetime, before quantum states, before observers.

I call it Interaction-Invariant Physics.