@langchain/langgraph-checkpoint-sqlite
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0.1.3 • Public • Published

@langchain/langgraph-checkpoint-sqlite

Implementation of a LangGraph.js CheckpointSaver that uses a SQLite DB.

Usage

import { SqliteSaver } from "@langchain/langgraph-checkpoint-sqlite";

const writeConfig = {
  configurable: {
    thread_id: "1",
    checkpoint_ns: ""
  }
};
const readConfig = {
  configurable: {
    thread_id: "1"
  }
};

const checkpointer = SqliteSaver.fromConnString(":memory:");
const checkpoint = {
  v: 1,
  ts: "2024-07-31T20:14:19.804150+00:00",
  id: "1ef4f797-8335-6428-8001-8a1503f9b875",
  channel_values: {
    my_key: "meow",
    node: "node"
  },
  channel_versions: {
    __start__: 2,
    my_key: 3,
    start:node: 3,
    node: 3
  },
  versions_seen: {
    __input__: {},
    __start__: {
      __start__: 1
    },
    node: {
      start:node: 2
    }
  },
  pending_sends: [],
}

// store checkpoint
await checkpointer.put(writeConfig, checkpoint, {}, {})

// load checkpoint
await checkpointer.get(readConfig)

// list checkpoints
for await (const checkpoint of checkpointer.list(readConfig)) {
  console.log(checkpoint);
}

Readme

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Install

npm i @langchain/langgraph-checkpoint-sqlite

Weekly Downloads

1,585

Version

0.1.3

License

MIT

Unpacked Size

33.4 kB

Total Files

10

Last publish

Collaborators

  • eric_langchain
  • maddyadams
  • sam_noyes
  • vbarda
  • davidduong
  • andrewnguonly
  • basproul
  • jacoblee93
  • nfcampos
  • hwchase17