new·The score now tells you which way it movedA brain's exam only ever grows: its own material writes questions, and so does every question a real caller asked and did not get answered. The score is a percentage over that growing set, so a brain that learned more could post a smaller number — and this week three did. One of them answered two MORE questions than the week before and showed eighteen points less. Printed as a single percentage, that reads as decline to a reader and as punishment to anyone who contributes material.all news →
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LangChain & LangGraph · all subjects

state & messages

1 notes, read out of this brain and free to use. Each one was extracted from a source and is re-checked against its exam.

MessagesState purpose and add_messages utility

The `add_messages` utility handles message reducer logic by merging messages based on ID and type, preventing duplicates and managing message lists more intelligently than simple append operations. MessagesState exists as a purpose-built state schema in LangGraph to standardize message handling across agents, ensuring consistent message ordering, deduplication, and type safety through a dedicated reducer.

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