phase: 20.49 COMPLETE; 20.50 Flow+String minimal reps; 20.51 selfhost v0/v1 minimal (Option A/B); hv1-inline binop/unop/copy; docs + run_all + CURRENT_TASK -> 21.0

tests/development/test_modulo_simple_main.hako

@@ -0,0 +1,37 @@
+// 🧪 % Modulo Operator Test - Simple functionality verification
+
+static box Main {
+    init { console }
+    
+    main() {
+        me.console = new ConsoleBox()
+        me.console.log("🧪 Testing % Modulo Operator")
+        
+        // Test 1: Basic modulo operation
+        local result1 = 10 % 3
+        me.console.log("10 % 3 = " + result1)
+        
+        // Test 2: Chip-8 style bit masking 
+        local result2 = 4096 % 4096
+        me.console.log("4096 % 4096 = " + result2)
+        
+        // Test 3: Another typical case
+        local result3 = 256 % 16  
+        me.console.log("256 % 16 = " + result3)
+        
+        // Test 4: Common modulo pattern
+        local result4 = 17 % 5
+        me.console.log("17 % 5 = " + result4)
+        
+        // Check results
+        if result1 == 1 and result2 == 0 and result3 == 0 and result4 == 2 {
+            me.console.log("✅ % Modulo operator test SUCCESSFUL!")
+        } else {
+            me.console.log("❌ % Modulo operator test FAILED!")
+            me.console.log("Expected: 1, 0, 0, 2")
+            me.console.log("Got: " + result1 + ", " + result2 + ", " + result3 + ", " + result4)
+        }
+        
+        return "Modulo test complete"
+    }
+}