diff --git a/.hyperhive/review-classifier.yml b/.hyperhive/review-classifier.yml
index 90e6af9c..4b90ea79 100644
--- a/.hyperhive/review-classifier.yml
+++ b/.hyperhive/review-classifier.yml
@@ -31,6 +31,15 @@ classifications:
       implementation or public API.
     polarity: negative
     threshold: 75
+  - name: no-binary-blobs
+    description: >-
+      The diff adds binary data to the repository: a binary file, or text
+      that encodes one, such as base64, hex or PEM-armoured data, a long
+      byte array, or a data URI. This holds for test fixtures too. A hash,
+      a lockfile pin, a commit id or a short token is not a blob, and neither
+      is a text asset such as SVG, CSS or JSON.
+    polarity: negative
+    threshold: 70
   - name: tests-with-behaviour
     description: >-
       The decision-making logic a change adds or alters in Rust or