diff --git a/Makefile b/Makefile
index cea782c2a..b6554fa06 100644
--- a/Makefile
+++ b/Makefile
@@ -119,7 +119,6 @@ stop:
 clean: stop
 	@echo "Cleaning up..."
 	@-rm -rf backend/.deer-flow 2>/dev/null || true
-	@-rm -rf backend/.langgraph_api 2>/dev/null || true
 	@-rm -rf logs/*.log 2>/dev/null || true
 	@echo "✓ Cleanup complete"
 
diff --git a/backend/Dockerfile b/backend/Dockerfile
index dcb2f26e4..b9a3b61a5 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -64,7 +64,7 @@ FROM builder AS dev
 # Install Docker CLI (for DooD: allows starting sandbox containers via host Docker socket)
 COPY --from=docker:cli /usr/local/bin/docker /usr/local/bin/docker
 
-EXPOSE 8001 2024
+EXPOSE 8001
 
 CMD ["sh", "-c", "cd backend && PYTHONPATH=. uv run uvicorn app.gateway.app:app --host 0.0.0.0 --port 8001"]
 
@@ -94,8 +94,8 @@ WORKDIR /app
 # Copy backend with pre-built virtualenv from builder
 COPY --from=builder /app/backend ./backend
 
-# Expose ports (gateway: 8001, langgraph: 2024)
-EXPOSE 8001 2024
+# Expose Gateway API port.
+EXPOSE 8001
 
 # Default command (can be overridden in docker-compose)
 CMD ["sh", "-c", "cd backend && PYTHONPATH=. uv run --no-sync uvicorn app.gateway.app:app --host 0.0.0.0 --port 8001"]
diff --git a/backend/tests/test_gateway_runtime_cleanup.py b/backend/tests/test_gateway_runtime_cleanup.py
index 7a7648474..ae640267d 100644
--- a/backend/tests/test_gateway_runtime_cleanup.py
+++ b/backend/tests/test_gateway_runtime_cleanup.py
@@ -43,6 +43,20 @@ def test_service_launchers_always_use_gateway_runtime():
         assert "LANGGRAPH_REWRITE" not in content, path
 
 
+def test_backend_container_only_exposes_gateway_port():
+    dockerfile = _read("backend/Dockerfile")
+
+    assert not re.search(r"^EXPOSE\s+.*\b2024\b", dockerfile, re.M)
+    assert "langgraph: 2024" not in dockerfile
+    assert re.search(r"^EXPOSE\s+8001\b", dockerfile, re.M)
+
+
+def test_root_makefile_clean_does_not_reference_langgraph_server_cache():
+    makefile = _read("Makefile")
+
+    assert ".langgraph_api" not in makefile
+
+
 def test_nginx_routes_official_langgraph_prefix_to_gateway_api():
     for path in ("docker/nginx/nginx.local.conf", "docker/nginx/nginx.conf"):
         content = _read(path)