nash — the Nucleic Agent Shell — is the shell narOS gives every agent, built for how agents actually work. Every command they run, every file they touch, every byte that crosses a pipe: on the record the moment it happens. So you never have to read a transcript and hope it's telling the truth.
nash isn't something you run your commands through — it's what narOS runs commands with. The login session, every sh -c, every Makefile recipe, every package install hook, three subshells down: all of it is already nash, because there's nothing else down there. Nothing to opt into, no list of tools to keep current, nothing to anticipate — if it ran, you saw it.
Knowing an agent ran curl … | sh tells you almost nothing. You want what came down that pipe, what landed in that file, what a command quietly handed back — and that's what you get. Anything credential-shaped is masked on the machine before it leaves, so the record is safe to keep and safe to share: your secrets stay secrets, even in your own audit trail.
Nothing runs slower, nothing behaves differently, and nothing that worked before stops working. Output comes back byte for byte, and on the rare command that confuses it, the work carries on anyway. Seeing everything costs you nothing — which is exactly why it can stay on everywhere, all the time, instead of only when you remember to care.
A commit, a push, a file rewritten — it appears in your feed and on your iPhone the instant it happens, because Nucleic watched it, not because it guessed from a transcript afterward. That's the difference between reviewing every line by hand and letting good work merge itself while you're somewhere else entirely.
Every command, in every script, subshell, and pipeline — not a sampled few.
Same speed, same behavior, same output. Nothing to notice, nothing that breaks.
Secrets are masked before they ever leave the machine, so the record is shareable.
Sandboxes, cloud runners, Linux VMs, Macs — one record, wherever the work ran.
Nucleic is in open beta. All it asks is macOS 27 on Apple Silicon.