test: cover deterministic HashMap ordering paths

src/identity.rs

@@ -1452,4 +1452,37 @@ mod tests {
         );
         assert_eq!(identity.psychology.unwrap().mbti.as_deref(), Some("ENTP"));
     }
+
+    #[test]
+    fn aieos_to_system_prompt_sorts_hashmap_sections_for_determinism() {
+        let mut neural_matrix = std::collections::HashMap::new();
+        neural_matrix.insert("zeta".to_string(), 0.10);
+        neural_matrix.insert("alpha".to_string(), 0.90);
+
+        let mut favorites = std::collections::HashMap::new();
+        favorites.insert("snack".to_string(), "tea".to_string());
+        favorites.insert("book".to_string(), "rust".to_string());
+
+        let identity = AieosIdentity {
+            psychology: Some(PsychologySection {
+                neural_matrix: Some(neural_matrix),
+                ..Default::default()
+            }),
+            interests: Some(InterestsSection {
+                favorites: Some(favorites),
+                ..Default::default()
+            }),
+            ..Default::default()
+        };
+
+        let prompt = aieos_to_system_prompt(&identity);
+
+        let alpha_pos = prompt.find("- alpha: 0.90").unwrap();
+        let zeta_pos = prompt.find("- zeta: 0.10").unwrap();
+        assert!(alpha_pos < zeta_pos);
+
+        let book_pos = prompt.find("- book: rust").unwrap();
+        let snack_pos = prompt.find("- snack: tea").unwrap();
+        assert!(book_pos < snack_pos);
+    }
 }