[AIC-3451] Register LangChain handlers in the Python example registry

examples/register.py

@@ -17,6 +17,8 @@
 )
 from launchdarkly_ai_claude_agents import ClaudeWebSearch, create_claude_agents_handler
 from launchdarkly_ai_claude_messages import create_claude_messages_handler
+from launchdarkly_ai_langchain_agents import create_langchain_agents_handler
+from launchdarkly_ai_langchain_messages import create_langchain_messages_handler
 from launchdarkly_ai_openai_agents import create_openai_agent_handler
 from launchdarkly_ai_openai_messages import create_openai_messages_handler
 from launchdarkly_ai_server import global_registry
@@ -27,6 +29,8 @@
         create_openai_agent_handler(),
         create_claude_agents_handler(),
         create_claude_messages_handler(),
+        create_langchain_messages_handler(),
+        create_langchain_agents_handler(),
     ],
     tools={
         # LD documentation agent tools

pyproject.toml

@@ -23,6 +23,7 @@ dev = [
   "ruff>=0.15.20",
   "pre-commit>=4.6.0",
   "brotlicffi>=1.0",
+  "langchain-aws>=1",
 ]
 
 [tool.pytest.ini_options]