Clean action runtime project state

tests/test_service_containers.py

@@ -66,3 +66,17 @@ class TestContainerService:
         svc = ContainerService(ctx)
         svc.remove("api")
         assert any("docker" in str(c) and "rm" in str(c) for c in runner.calls)
+
+    def test_exec_command_uses_container_exec_action(self, tmp_path):
+        runner = FakeRunner(responses={
+            ("ps", "{{.Names}}"): subprocess.CompletedProcess([], 0, stdout="dev-api\n"),
+        })
+        ctx = _make_ctx(tmp_path, runner=runner)
+        svc = ContainerService(ctx)
+
+        try:
+            svc.exec("api", ["echo", "hello"])
+        except SystemExit as e:
+            assert e.code == 0
+
+        assert ["docker", "exec", "dev-api", "echo", "hello"] in runner.calls