Any LangGraph project repos to recommend

I want some repos link which use next js and LangGraph typescript to build agents. I want to understand their codebase to make mine better. Right now I have is a workflow. And it does it ld work perfectly. But I want to add new features to it and make it proper agent. So I'm kind of confusing here so need help for building agents if you have built or know any repos please do share. 🙏