installer

rig/BOOTSTRAP.md

@@ -143,6 +143,10 @@ From here on this machine has curl, so **`make deps` is the short form** for
 every later run and every later copy of this directory. The container path is
 the first-time path.
 
+How the installer itself is tested — machine fixtures, clean containers, a
+Workspace snapshot, a throwaway WSL distro — is in
+[`docs/notes/installer-testing.md`](docs/notes/installer-testing.md).
+
 
 ## Prove the machine before blaming the project