Field notes
Shipping production AI, in public.
Essays on Retrieval-Augmented Generation, LangChain in production, and the realities of architecting AI systems inside large enterprises.
Featured essay
The High Cost of Convenience: Why I Choose Postgres over MongoDB for Production LangChain Checkpointing
A systems-minded take on total cost of ownership and architectural control: why Postgres and PostgresSaver beat MongoDB Atlas for production LangChain agents—and when the 'boring' stack wins.
Feb 28, 2026