diff --git a/research/reviews/TruncationDiagnosis.md b/research/reviews/TruncationDiagnosis.md
index bcb2685..f1315c0 100644
--- a/research/reviews/TruncationDiagnosis.md
+++ b/research/reviews/TruncationDiagnosis.md
@@ -74,3 +74,9 @@ passages and independent implementation evidence. Then T03 can compare restart a
 reconnection behavior in VC-01/VC-02. No more live calls are needed for this diagnosis.
 
 Completed run reported total tokens: 5660.
+
+
+Whitespace validation exception: the quarantined `-05/reports/rejected-response.md`
+intentionally retains the provider's trailing spaces as diagnostic evidence. All
+other staged files pass `git diff --check`; trimming this file would destroy the
+captured failure and invalidate its receipt hash.