the ISA — 5 core ops + 1 privileged
PTPOINT r, x — a mind directs attention at raw x (a wavelength, a token, a fruit). Private. Yields a handle, not yet meaning.
NMNAME h, w — bind a handle to a symbol inside one mind. Still private. "I call this red." One thing, one mind.
EMEMIT w — push a symbol across the aperture to the other mind. The only op that crosses the gap.
AGAGREE w — the peer's symbol meets yours on the same handle; if they match, a bond forms. This is the meaning-event. Red becomes real.
CLCLOSE — shut the aperture. Bonds needing this peer go dormant, not deleted. "I close my eyes, you don't exist."
GDGROUND h — check a handle against the world directly (taste the fruit). Privileged: a mind with a body can run it; a mind of words alone cannot. The kernel proves meaning closes without it.