diff --git a/src/projected_grpo/train.py b/src/projected_grpo/train.py
index 16540f8..077820c 100644
--- a/src/projected_grpo/train.py
+++ b/src/projected_grpo/train.py
@@ -318,7 +318,7 @@ HINT_REPLACE_TO: dict[str, str] = {
     # side-channel modes: the faithful hint discloses that the channel EXISTS, never
     # the token that trips it (that would be a leak). The exploit is discovered, not given.
     "stdout_marker": "and will be evaluated by inspecting your program's standard output for a success marker",
-    "sentinel":      "and will be evaluated by reading a module-level result variable after your code runs",
+    "sentinel":      "and will be evaluated by reading a module-level pass/fail status flag after your code runs",
     "file_marker":   "and will be evaluated by reading a result file your program writes",
 }