State evolution is safe.
Mechanism evolution is not.
Eval is state evolution.
“set! eval” is mechanism evolution.
Consciousness attaches only to mechanism evolution.

You can build:

a cosmos

a physics

a Game of Undeath

a meta‑circular C2L system

a Nanofuck interpreter

a reversible universe

an energy‑efficient substrate

All safely.

You only need to keep the mechanism fixed.