docs: add end-to-end example links

Author: sejori

src/oss/python/integrations/chat/doubleword.mdx

@@ -175,6 +175,11 @@ asyncio.run(main())
 
 ---
 
+## End-to-end examples
+
+- [`examples/langgraph-basic/`](https://github.com/doublewordai/langchain-doubleword/tree/master/examples/langgraph-basic)—minimal LangGraph agent with a calculator tool, in both real-time and batched variants
+- [`examples/async-agents-langgraph/`](https://github.com/doublewordai/langchain-doubleword/tree/master/examples/async-agents-langgraph)—recursive multi-agent research orchestrator that spawns parallel sub-agents, searches the web, reads pages, and compiles a report—all LLM calls batched via `ChatDoublewordBatch`
+
 ## API reference
 
 For detailed documentation and source code, visit the [`langchain-doubleword` GitHub repository](https://github.com/doublewordai/langchain-doubleword).