Module●Since v1.0

tracers/tracer_langchain

import { ... } from "@langchain/core/tracers/tracer_langchain";

Classes

class

LangChainTracer

Interface for the input parameters of the BaseCallbackHandler class. It allows to specify which types of events should be ignored by the callback handler.

Interfaces

interface

LangChainTracerFields

Interface for the input parameters of the BaseCallbackHandler class. It allows to specify which types of events should be ignored by the callback handler.

Variables

variable

OVERRIDABLE_LANGSMITH_INHERITABLE_METADATA_KEYS: Set<string>

Keys that should be inherited from tracerInheritableMetadata even when the run already has a value for them. This lets nested contexts (e.g. a subagent invoked from inside a parent agent) override a LangSmith-only tracing metadata value that was set by an ancestor.

Keep this list very small: every key here loses the default "first wins" protection and is always clobbered by the nearest enclosing tracer config. Only keys that are strictly for LangSmith tracing bookkeeping should be added.

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tracers/tracer_langchain

Classes

Interfaces

Variables

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tracers/tracer_langchain

Classes

Interfaces

Variables