feat(controls): B3 — categorize the rest of needs_tooling (architectural + RBAC)

Closes out B's coverage of the 16 needs_tooling CRA controls:

- cra-ai-2,3,4,5 (minimal attack surface, secure architecture, least-privilege,
  tamper protection) are design properties, not local code patterns -> marked
  not_code_checkable (out of static-scan scope) with reviewer notes.
- cra-ai-12 (RBAC) is surface-checkable (authorization points) -> added to the
  grounded surface pass; note points to the gated grounded mechanism.

Final CRA coverage: covered 13 | needs_tooling 8 (all grounded-covered, gated) |
not_code_checkable 19. The 16 needs_tooling now fully categorized:
4 custom-semgrep (B1) + 8 grounded surface (B2/B3, gated) + 4 architectural (B3).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

compliance-agent/src/controls/surface.rs

@@ -47,6 +47,17 @@ pub const SURFACES: &[Surface] = &[
             "ratelimit",
         ],
     },
+    Surface {
+        control_id: "cra-ai-12", // Rollenbasierte Autorisierung (RBAC)
+        terms: &[
+            "authorize",
+            "permission",
+            "role",
+            "rbac",
+            "require_role",
+            "has_role",
+        ],
+    },
     Surface {
         control_id: "cra-ai-24", // Security-Logging
         terms: &["login", "authorize", "permission", "role", "admin", "audit"],
@@ -196,10 +207,11 @@ mod tests {
 
     #[test]
     fn surfaces_cover_the_absence_based_controls() {
-        assert_eq!(SURFACES.len(), 7);
+        assert_eq!(SURFACES.len(), 8);
         for id in [
             "cra-ai-6",
             "cra-ai-11",
+            "cra-ai-12",
             "cra-ai-24",
             "cra-ai-27",
             "cra-ai-28",

control-map/data/cra_control_map.json

@@ -25,29 +25,29 @@
       "control": "cra-ai-2",
       "title": "Minimale Angriffsflaeche",
       "scans": [],
-      "note": "code-checkable but no off-the-shelf tool digs it out — author a detector (custom semgrep rule / check)",
-      "status": "needs_tooling"
+      "note": "design property (minimal attack surface) — not derivable from local code patterns; architecture/threat-model review",
+      "status": "not_code_checkable"
     },
     {
       "control": "cra-ai-3",
       "title": "Sichere Systemarchitektur",
       "scans": [],
-      "note": "code-checkable but no off-the-shelf tool digs it out — author a detector (custom semgrep rule / check)",
-      "status": "needs_tooling"
+      "note": "design property (secure system architecture) — architecture review, not statically code-checkable",
+      "status": "not_code_checkable"
     },
     {
       "control": "cra-ai-4",
       "title": "Least-Privilege-Prinzip",
       "scans": [],
-      "note": "code-checkable but no off-the-shelf tool digs it out — author a detector (custom semgrep rule / check)",
-      "status": "needs_tooling"
+      "note": "design property (least-privilege) — deployment/IAM & architecture review, not a local code pattern",
+      "status": "not_code_checkable"
     },
     {
       "control": "cra-ai-5",
       "title": "Manipulationsschutz",
       "scans": [],
-      "note": "code-checkable but no off-the-shelf tool digs it out — author a detector (custom semgrep rule / check)",
-      "status": "needs_tooling"
+      "note": "design property (tamper protection) — hardware/runtime & operational control, not statically code-checkable",
+      "status": "not_code_checkable"
     },
     {
       "control": "cra-ai-6",
@@ -146,7 +146,7 @@
       "control": "cra-ai-12",
       "title": "Rollenbasierte Autorisierung",
       "scans": [],
-      "note": "code-checkable but no off-the-shelf tool digs it out — author a detector (custom semgrep rule / check)",
+      "note": "absence-based — no syntactic pattern; covered by the grounded surface check (retrieve surface + LLM judge), gated (BREAKPILOT_GROUNDED_CHECKS) pending live tuning",
       "status": "needs_tooling"
     },
     {

control-map/src/lib.rs

@@ -214,6 +214,27 @@ mod tests {
         assert!(hits.iter().any(|c| c.control == "cra-ai-1"));
     }
 
+    #[test]
+    fn coverage_reflects_the_b_track_split() {
+        let s = ControlMap::cra().unwrap().summary();
+        // 9 already tool-covered + B1's 4 custom-semgrep controls.
+        assert_eq!(s.covered, 13);
+        // The 8 grounded surface controls stay needs_tooling until live-tuned.
+        assert_eq!(s.needs_tooling, 8);
+        // B3 marked the 4 pure-architectural controls not code-checkable.
+        assert_eq!(s.not_code_checkable, 19);
+    }
+
+    #[test]
+    fn architectural_controls_are_not_code_checkable() {
+        let map = ControlMap::cra().unwrap();
+        for id in ["cra-ai-2", "cra-ai-3", "cra-ai-4", "cra-ai-5"] {
+            let c = map.coverage(id).unwrap();
+            assert_eq!(c.status, Coverage::NotCodeCheckable, "{id}");
+            assert!(c.scans.is_empty(), "{id} should carry no scan bindings");
+        }
+    }
+
     #[test]
     fn custom_rule_controls_do_not_bind_by_broad_cwe() {
         let map = ControlMap::cra().unwrap();