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JavaScript@langchain/langgraphwebMemorySaver
Class●Since v0.3

MemorySaver

Copy
class MemorySaver

Bases

BaseCheckpointSaver

Used in Docs

  • Build a custom SQL agent
  • Build a multi-source knowledge base with routing
  • Build a personal assistant with subagents
  • Build a SQL assistant with on-demand skills
  • Build a voice agent with LangChain
(5 more not shown)

Constructors

constructor
constructor

Properties

property
serde: SerializerProtocol
property
storage: Record<string, Record<string, Record<string, [Uint8Array, Uint8Array, string | undefined]>>>
property
writes: Record<string, Record<string, [string, string, Uint8Array]>>

Methods

method
deleteThread→ Promise<void>

Delete all checkpoints and writes associated with a specific thread ID.

method
get→ Value

Return the current value of the channel.

method
getNextVersion→ V

Generate the next version ID for a channel.

Default is to use integer versions, incrementing by 1. If you override, you can use str/int/float versions, as long as they are monotonically increasing.

method
getTuple→ Promise<CheckpointTuple | undefined>
method
list→ AsyncGenerator<CheckpointTuple>
method
put→ Promise<void>

Store or update an item.

method
putWrites→ Promise<void>

Store intermediate writes linked to a checkpoint.

Inherited fromBaseCheckpointSaver

Properties

Pserde: SerializerProtocol

Methods

MdeleteThread→ Promise<void>
—

Delete all checkpoints and writes associated with a specific thread ID.

Mget→ Value
—

Return the current value of the channel.

MgetNextVersion→ V
—

Generate the next version ID for a channel.

MgetTuple→ Promise<CheckpointTuple | undefined>Mlist→ AsyncGenerator<CheckpointTuple>Mput→ Promise<void>
—

Store or update an item.

MputWrites→ Promise<void>
—

Store intermediate writes linked to a checkpoint.

View source on GitHub