Gate SI layout_rules to the quoted bus, not EN RC onto USB.

PE-SI-009 no longer treats ESP32 CHIP_PU/EN RC as a USB series R.
USB without a library Z number stays PE-SI-010 measurement-only.
Pintable skill 1.13.0 requires net_class on SI kinds (usb2/usb3/MDI/RGMII/DDR3).

backend/periscopex/layout_rules.py

@@ -48,6 +48,20 @@ def has_si_layout_rule(raw: object) -> bool:
     return False
 
 
+def has_ungated_si_rule(raw: object) -> bool:
+    """True when an SI kind has no net_class — it must not paint USB/DDR/PHY."""
+    if not isinstance(raw, list):
+        return False
+    for row in raw:
+        if not isinstance(row, dict):
+            continue
+        if str(row.get("kind") or "").strip() not in SI_KINDS:
+            continue
+        if not str(row.get("net_class") or "").strip():
+            return True
+    return False
+
+
 def needs_layout_rules_refresh(
     data: dict,
     *,
@@ -61,6 +75,9 @@ def needs_layout_rules_refresh(
     From skill 1.11.0, SI kinds are first-class. An older JSON that only
     has decoupling/thermal rules is stale and must be re-extracted so
     ImpedenceFinder checks are not starved.
+
+    From skill 1.13.0, SI kinds without ``net_class`` are ungated (EN RC
+    was painted onto USB). Re-extract those.
     """
     ver = str(data.get("model_version") or "0.0.0")
     if not min_scan_version or min_scan_version == "0.0.0":
@@ -76,7 +93,19 @@ def needs_layout_rules_refresh(
     except Exception:
         need_si = False
     if need_si:
-        return not has_si_layout_rule(data.get("layout_rules"))
+        try:
+            need_bus = Version(min_scan_version) >= Version("1.13.0")
+        except Exception:
+            need_bus = False
+        if need_bus and has_ungated_si_rule(data.get("layout_rules")):
+            return True
+        if has_si_layout_rule(data.get("layout_rules")):
+            return False
+        try:
+            extracted_before_si = Version(ver) < Version("1.11.0")
+        except Exception:
+            extracted_before_si = True
+        return extracted_before_si
     return not has_any_layout_rule(data.get("layout_rules"))