diff --git a/docs/architecture.md b/docs/architecture.md
index 63d7e78..9979eea 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -243,6 +243,9 @@ expectations and inferred aims remain distinct; neither becomes proof of
 author intent or goal completion. Markdown retains the caveat as plain text.
 `reporting/illustrations.py` supplies fixed SVG shapes for the Before/After
 comparison. Model output supplies text and selectors, never markup.
+The edit illustration uses an original solid open-end wrench with a compact head
+and slim handle, not third-party artwork. Check its silhouette in both card
+palettes when changing its geometry.
 Summary and trial-summary instructions require concrete, parallel descriptions
 of the same subject, with the decisive contrast and any unchanged decision
 explicitly stated. Summary selection prefers the observed changed operative rule
diff --git a/plugin/skills/behavior-diff/scripts/reporting/illustrations.py b/plugin/skills/behavior-diff/scripts/reporting/illustrations.py
index 7736bf3..f1fa745 100644
--- a/plugin/skills/behavior-diff/scripts/reporting/illustrations.py
+++ b/plugin/skills/behavior-diff/scripts/reporting/illustrations.py
@@ -14,9 +14,12 @@
     'fill="none" stroke="currentColor" stroke-width="4" stroke-linecap="round"/>',
     "edit": _PAPER
     + '<circle cx="162" cy="106" r="48" fill="var(--summary-accent-bg)"/>'
-    '<path d="m155 104-35 35a8 8 0 0 0 11 11l35-35 '
-    'a27 27 0 0 0 15-39l-19 19-13-4-4-13 19-19a27 27 0 0 0-9 45z" '
-    'fill="currentColor"/>',
+    '<svg x="114" y="58" width="96" height="96" viewBox="0 0 100 100">'
+    '<g transform="translate(65 28) rotate(45)" fill="currentColor">'
+    '<path d="M0 8V60" fill="none" stroke="currentColor" '
+    'stroke-width="10" stroke-linecap="round"/>'
+    '<path d="M-9-14C-20-9-21 5-11 12C-5 17 5 17 11 12'
+    'C21 5 20-9 9-14V-2L0 3L-9-2Z"/></g></svg>',
     "inspect": _PAPER
     + '<circle cx="151" cy="94" r="33" fill="var(--summary-accent-bg)" '
     'stroke="currentColor" stroke-width="6"/>'