mod: Ext 1 — negation-as-failure conditions (:not / :attr), 146/146

Report attributes (:attrs) project to attr(Id, name) facts; policy gains (:attr x)
and (:not <cond>) conditions. The Prolog substrate exposes negation as a functor
not(Goal) (the prefix \+ operator doesn't parse here). Closed-world example:
hide spam unless author verified. Default policy untouched — feature proven via
custom rule sets, so all 132 base tests stay green. +14 extension tests.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lib/mod/scoreboard.json

@@ -1,13 +1,14 @@
 {
   "lang": "mod",
-  "total_passed": 132,
+  "total_passed": 146,
   "total_failed": 0,
-  "total": 132,
+  "total": 146,
   "suites": [
     {"name":"decide","passed":31,"failed":0,"total":31},
     {"name":"audit","passed":29,"failed":0,"total":29},
     {"name":"escalation","passed":46,"failed":0,"total":46},
-    {"name":"fed","passed":26,"failed":0,"total":26}
+    {"name":"fed","passed":26,"failed":0,"total":26},
+    {"name":"extensions","passed":14,"failed":0,"total":14}
   ],
-  "generated": "2026-06-06T17:54:02+00:00"
+  "generated": "2026-06-06T17:58:37+00:00"
 }