Add known working config profile for reverting changes

README.md

@@ -133,6 +133,15 @@ currently enabled plugins (except `bsipa`) and `e` to enable all currently
 unchecked plugins. With a single Beat Saber installation, the menu opens the
 plugin table directly. Re-enabling a plugin auto-bootstraps BSIPA when needed.
 
+Use `s` to save the set of currently enabled plugins as that instance's
+known-good set, and `g` to restore it later: plugins outside the saved set are
+disabled and any saved plugins that are currently disabled/missing are
+re-enabled from local assets. This is handy after a newly added mod pulls in
+extra dependencies you don't actually want — press `g` to snap back to
+the combination you know works. Only one known-good set is kept per instance;
+saving again overwrites it. The equivalent automation commands are
+`save-known-good` and `restore-known-good`.
+
 The individual subcommands are mostly for automation and debugging. If you use
 them, pass `--state-dir` directly only when you intentionally want to override
 the configured state directory for one command.