mirror of https://github.com/langchain-ai/langgraph.git synced 2026-08-25 17:12:26 +02:00

Files

T

Quanzheng LongandCursor 9dc68d6986 test: add delta-channel conformance wrappers for InMemory and SQLite savers

Runs the three new delta-channel conformance capabilities
(delta_channel_history, delta_channel_keepset, delta_channel_reconstruction)
against InMemorySaver and AsyncSqliteSaver. Guarded by importorskip so
they're skipped gracefully when checkpoint-conformance isn't installed.

Co-authored-by: Cursor <cursoragent@cursor.com>

2026-05-07 11:15:34 -07:00

langgraph

feat(checkpoint-sqlite): override get_delta_channel_history with streaming walk (#7702 )

2026-05-05 15:30:57 -04:00

tests

test: add delta-channel conformance wrappers for InMemory and SQLite savers

2026-05-07 11:15:34 -07:00

LICENSE

docs: add license files for checkpoint-sqlite and checkpoint-postgres (#6392 )

2025-11-07 07:39:06 -05:00

Makefile

chore: add make type target for type checking (#6748 )

2026-02-21 05:13:38 +00:00

pyproject.toml

feat(checkpoint-sqlite): override get_delta_channel_history with streaming walk (#7702 )

2026-05-05 15:30:57 -04:00

README.md

docs: document LANGGRAPH_STRICT_MSGPACK for checkpoint security (#7517 )

2026-04-15 13:05:55 -07:00

uv.lock

feat(checkpoint-sqlite): override get_delta_channel_history with streaming walk (#7702 )

2026-05-05 15:30:57 -04:00

README.md

LangGraph SQLite Checkpoint

Implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite)

Security

Important

Set LANGGRAPH_STRICT_MSGPACK=true or pass an explicit allowed_msgpack_modules list when creating your checkpointer. This restricts checkpoint deserialization to known-safe types, preventing code execution if the database is compromised. See the langgraph-checkpoint README for details.

Usage

from langgraph.checkpoint.sqlite import SqliteSaver

write_config = {"configurable": {"thread_id": "1", "checkpoint_ns": ""}}
read_config = {"configurable": {"thread_id": "1"}}

with SqliteSaver.from_conn_string(":memory:") as checkpointer:
    checkpoint = {
        "v": 4,
        "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
            }
        },
    }

    # store checkpoint
    checkpointer.put(write_config, checkpoint, {}, {})

    # load checkpoint
    checkpointer.get(read_config)

    # list checkpoints
    list(checkpointer.list(read_config))

Async

from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver

async with AsyncSqliteSaver.from_conn_string(":memory:") as checkpointer:
    checkpoint = {
        "v": 4,
        "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
            }
        },
    }

    # store checkpoint
    await checkpointer.aput(write_config, checkpoint, {}, {})

    # load checkpoint
    await checkpointer.aget(read_config)

    # list checkpoints
    [c async for c in checkpointer.alist(read_config)]