diff --git a/version-rust/README.md b/version-rust/README.md
index 5a68d50..71548d2 100644
--- a/version-rust/README.md
+++ b/version-rust/README.md
@@ -80,6 +80,8 @@ Notes:
   working directory — pass `--catalog` when running elsewhere.
 - `sorter --audit` defaults to `<library>/../_logs/sorter_applied.jsonl`
   (bookkeeping stays out of the library, which may be a seeded torrent).
+- The sorter implements the rules in `version-python/docs/SORTING.md` — that
+  document is still the working agreement; change it first, then both codes.
 - Retry loops, cooldowns and the "one gofile guest account per run" rule are
   ported verbatim from `dlp.py`; a failure in one URL never aborts the run.
 - Ctrl-C: state.json is saved after every URL; re-run to resume (the python