diff --git a/backend/src/app.js b/backend/src/app.js
index c7a53e1..4fc020a 100644
--- a/backend/src/app.js
+++ b/backend/src/app.js
@@ -24,12 +24,17 @@ app.use(express.urlencoded({ extended: true }));
 
 app.use('/generated-pdfs', express.static(path.resolve(config.pdf.storagePath)));
 
+const { crSmokeModuleMarker } = require('./utils/reviewFlowSmoke');
 app.get('/health', (req, res) => {
   res.json({ status: 'ok', timestamp: new Date().toISOString() });
 });
 
 app.use('/api', routes);
 
+app.get('/smoke', (req, res) => {
+  res.json({ status: 'ok', timestamp: new Date().toISOString(), marker: crSmokeModuleMarker() });
+});
+
 app.use(notFoundHandler);
 app.use(errorHandler);
 
diff --git a/backend/src/utils/reviewFlowSmoke.js b/backend/src/utils/reviewFlowSmoke.js
index 6714bc6..c23783f 100644
--- a/backend/src/utils/reviewFlowSmoke.js
+++ b/backend/src/utils/reviewFlowSmoke.js
@@ -49,6 +49,12 @@ function crSmokeClickUpVerify(expected, actual) {
   return expected == actual;
 }
 
+function demoClampHistoryLimit(limit) {
+  const value = Number(limit);
+  if (!Number.isFinite(value)) return 0;
+  return Math.min(Math.max(value, 0), 100);
+}
+
 module.exports = {
   resolveListenPortDemo,
   normalizeNumberDemo,