docs(langgraph): document StateGraph.set_node_defaults() on fault-tolerance#3974
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docs(langgraph): document StateGraph.set_node_defaults() on fault-tolerance#3974open-swe[bot] wants to merge 4 commits into
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…erance page Adds a 'Graph-wide defaults' section covering the new fluent StateGraph.set_node_defaults() builder method from langchain-ai/langgraph#7747, including the supported kwargs and the rules for which defaults apply to error-handler nodes. Also registers 'set_node_defaults' in the API link map so @[`set_node_defaults`] resolves. Co-authored-by: Quanzheng Long <4523955+longquanzheng@users.noreply.github.com>
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…antics Adds two pointers to the Error handling section's 'Resume-safe failures' subsection: - The handler transition is atomic at the superstep boundary: the original node's error write is committed and the handler is scheduled in the same step. The failing node is never re-executed once the error-handling phase has begun. - Handler crashes resume safely: if the handler itself raises and a checkpointer is configured, resuming re-schedules the handler, not the original failing node. Co-authored-by: Quanzheng Long <4523955+longquanzheng@users.noreply.github.com>
Broaden the handler-resume pointer to cover host process crashes mid-handler, not just handler-raised exceptions. Co-authored-by: Quanzheng Long <4523955+longquanzheng@users.noreply.github.com>
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Description
Documents the new fluent
StateGraph.set_node_defaults()builder method shipped in langchain-ai/langgraph#7747. Adds a new Graph-wide defaults section to the fault-tolerance page covering supported kwargs (retry_policy,timeout,cache_policy,error_handler), the override precedence rule, and which defaults apply to error-handler nodes. Also registersset_node_defaultsin the API link map.Release Note
Document
StateGraph.set_node_defaults()for configuring graph-wide retry, timeout, cache, and error-handler defaults.Test Plan
@[\set_node_defaults`]` link resolves to the published API reference once the langgraph release containing #7747 is live.Opened collaboratively by Quanzheng Long and open-swe.