Really enjoyed this write-up on how they built Fern Agent. It's a good example of durable agents with DBOS in action: checkpointing model and tool calls in the same Postgres the agent already uses, then picking up where it left off after crashes or deploys. buildwithfern.com/post/buildin...
How we built Fern Agent
How we built Fern Agent: why we persisted conversations before it had a single tool, taught it that valid markdown isn't valid Fern, and secured write access to customer docs before it shipped.
buildwithfern.com