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

errors/langgraph

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

MULTIPLE_SUBGRAPHS error code

MULTIPLE_SUBGRAPHS is a LangGraph error code that indicates an invalid configuration with multiple subgraphs.

GRAPH_RECURSION_LIMIT error code

GRAPH_RECURSION_LIMIT is a LangGraph error code that indicates the graph has exceeded its recursion limit.

INVALID_CHAT_HISTORY error code

INVALID_CHAT_HISTORY is a LangGraph error code that indicates an issue with the chat history format or content.

INVALID_CONCURRENT_GRAPH_UPDATE error code

INVALID_CONCURRENT_GRAPH_UPDATE is a LangGraph error code that indicates an attempt to update the graph concurrently in an invalid way.

INVALID_GRAPH_NODE_RETURN_VALUE error code

INVALID_GRAPH_NODE_RETURN_VALUE is a LangGraph error code that indicates a graph node returned an invalid value.

MISSING_CHECKPOINTER error code

MISSING_CHECKPOINTER is a LangGraph error code that indicates a required checkpointer is not configured.

LangGraph release cadence

LangGraph spaces out major releases by at least 6-12 months to provide stability for production applications. Minor releases are typically released every 1-2 months with new features and improvements. Patch releases are released as needed, often weekly, to address bugs and security issues.

LangGraph stable APIs

All LangGraph APIs without special prefixes are considered stable and ready for production use. LangGraph maintains backward compatibility for stable features within a major version.

LangGraph beta features

Features marked as beta in the LangGraph documentation are feature-complete and tested. They are safe for production use with the understanding they may change. Beta features are subject to minor API adjustments based on user feedback.

LangGraph experimental and alpha features

LangGraph features marked as experimental or alpha are under active development, may change significantly or be removed, and should be used with caution in production.

LangGraph internal APIs

LangGraph APIs prefixed with underscore (_) or explicitly marked as internal are not part of the public API, may change without notice, and should not be used directly.

LangGraph deprecation policy

When deprecating features in LangGraph, the process includes: (1) Deprecation Notice - features are marked as deprecated with clear migration guidance, (2) Grace Period - deprecated features remain functional for at least one minor version, (3) Removal - features are removed only in major version releases, (4) Migration Support - migration guides and automated tools are provided when possible.

LangGraph Python support requirements

LangGraph supports Python versions that are actively maintained by the Python Software Foundation. Python version requirements may change only in major releases. Currently, LangGraph requires Python 3.10 or later.

LangGraph breaking changes policy

Breaking changes in LangGraph are only introduced in major versions and include: removal of deprecated APIs, changes to required parameters, changes to default behavior that affect existing applications, and minimum Python version updates.

LangGraph 0.4 legacy version support

LangGraph 0.4 is in MAINTENANCE mode until December 2026 and receives all security patches and critical bug fixes.

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