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Overview Graphs Functional API Pregel Checkpointing Storage Caching Types Runtime Config Errors Constants Channels Agents

LangGraph Checkpoint

Checkpoint Postgres

Checkpoint SQLite

LangGraph Prebuilt

LangGraph Supervisor

LangGraph Swarm

Language

Theme

PythonlanggraphstreamtransformersLifecyclePayload

Class●Since v1.1

LifecyclePayload

Copy

LifecyclePayload()

Bases

TypedDict

Constructors

Attributes

View source on GitHub

constructor

__init__

Name	Type
event	SubgraphStatus
namespace	list[str]
graph_name	NotRequired[str]
trigger_call_id	NotRequired[str]
error	NotRequired[str]

event: SubgraphStatus

namespace: list[str]

graph_name: NotRequired[str]

trigger_call_id: NotRequired[str]

error: NotRequired[str]

Payload of a lifecycle event surfaced on the lifecycle channel.

Auto-forwarded as lifecycle protocol events (no custom: prefix because LifecycleTransformer is a native transformer) so remote SDK clients receive the same data in-process consumers see via run.lifecycle.