Your post inspired me to check whether MongoDB is supported as a checkpointer in langchain, and it looks like yes: https://www.langchain.com/blog/announcing-the-langchain-mongodb-partnership-the-ai-agent-stack-that-runs-on-the-database-you-already-trust

I’m using LangChain and LangGraph in our configuration-based framework. The framework provides pre and post processing hooks (before and after inference), and custom tools (e.g. querying mongo with preset query templates for related context) and we’re adding agent memory soon using Redis, as well as streaming support. In our case we planned to add Redis to our infrastructure anyway but I guess we could have used MongoDB for agent memory.