Compaction without summarization — score the tool calls and drop them
Tamara Tran argued that agent context compaction is still a summarization prompt in 2026, and that Jev can instead keep or drop tool output verbatim.
LangChain ships a Jev classifier, then parks it on the agent loop
Official LangChain docs add langchain-typesafe. Jev becomes a Runnable for routing and a pair of experimental middleware hooks, not a chat model drop-in.