remove profile dependency

rig/standalone/README.md

@@ -25,6 +25,23 @@ make deps / make mem            # the same, via the Makefile
 `rigmini.sh push` and `all` deliberately consume memory. Run `status` first, and
 only run them somewhere other processes may be squeezed.
 
+## Your own setup, somewhere else — `export`
+
+The folders here are rig's **profiles**, identical on any machine. To take the
+setup **this machine runs** instead — its profile plus the choices in its local
+`ctrl/.env` (ports, manifest directory, mirror mode) — export it:
+
+```bash
+make standalone export ~/rig-kit       # one kit, outside the repository
+```
+
+An export carries your **choices, never your credentials**. Anything in `ctrl/.env`
+that is not a setting a caller may override — registry logins, a mirror URL — is
+left out, and the export lists those names so you know what to set on the target.
+It refuses to write inside the repository: it reflects one machine, and the
+repository holds what is true for every machine. `make selftest` proves both with
+sentinel values.
+
 ## Why generated
 
 These used to be hand-kept copies, and they drifted: the standalone memory tool