phase29ao(p23): strict/dev adopt pattern3 from facts

src/mir/builder/control_flow/joinir/patterns/router.rs

@@ -357,6 +357,28 @@ pub(crate) fn route_loop_pattern(
             return PlanLowerer::lower(builder, core_plan, ctx);
         }
 
+        if strict_or_dev
+            && matches!(
+                domain_plan,
+                crate::mir::builder::control_flow::plan::DomainPlan::Pattern3IfPhi(_)
+            )
+        {
+            let facts = outcome
+                .facts
+                .as_ref()
+                .ok_or_else(|| "pattern3 strict/dev adopt failed: facts missing".to_string())?;
+            if facts.facts.pattern3_ifphi.is_none() {
+                return Err("pattern3 strict/dev adopt failed: facts mismatch".to_string());
+            }
+            let core_plan =
+                PlanNormalizer::normalize_pattern3_if_phi_from_facts(builder, facts, ctx)?
+                    .ok_or_else(|| {
+                        "pattern3 strict/dev adopt failed: compose rejected".to_string()
+                    })?;
+            PlanVerifier::verify(&core_plan)?;
+            return PlanLowerer::lower(builder, core_plan, ctx);
+        }
+
         return lower_via_plan(builder, domain_plan, ctx);
     }