[Build with Tigris](/blog/tags/build-with-tigris/.md)

## [Every Tenant Has a Past: Evaluating LangGraph Agents](/blog/eval-agents-real-state/.md)

Fork a customer's entire LangGraph agent state, replay their conversations through a prompt change, and judge it head-to-head before you ship to prod.

David Myriel · June 30, 2026 ·

<!-- -->

13 min read