diff --git a/Makefile b/Makefile
index 7afdca3a..48a147b8 100644
--- a/Makefile
+++ b/Makefile
@@ -254,11 +254,11 @@ release-dry-run:
 # Chaos Engineering targets
 chaos-validate:
 	@echo "🔥 Running architectural independence validation..."
-	$(VENV_PYTHON) chaos_test_runner.py validate-independence
+	$(VENV_PYTHON) tools/chaos_test_runner.py validate-independence
 
 chaos-matrix:
 	@echo "🏗️  Showing architectural dependency matrix..."
-	$(VENV_PYTHON) chaos_test_runner.py dependency-matrix
+	$(VENV_PYTHON) tools/chaos_test_runner.py dependency-matrix
 
 chaos-inject:
 	@echo "💥 Injecting chaos into layer..."
@@ -266,11 +266,11 @@ chaos-inject:
 		echo "❌ Usage: make chaos-inject LAYER=L1_Presentation TYPE=import_failure"; \
 		exit 1; \
 	fi
-	$(VENV_PYTHON) chaos_test_runner.py inject-layer-failure --layer $(LAYER) $(if $(TYPE),--injection-type $(TYPE))
+	$(VENV_PYTHON) tools/chaos_test_runner.py inject-layer-failure --layer $(LAYER) $(if $(TYPE),--injection-type $(TYPE))
 
 chaos-report:
 	@echo "📄 Generating chaos engineering report..."
-	$(VENV_PYTHON) chaos_test_runner.py chaos-report
+	$(VENV_PYTHON) tools/chaos_test_runner.py chaos-report
 
 # Code linting
 lint: $(VENV)/bin/activate
diff --git a/chaos_test_runner.py b/tools/chaos_test_runner.py
similarity index 100%
rename from chaos_test_runner.py
rename to tools/chaos_test_runner.py