feat(langgraph): add Runtime.on_exit for cleanup that runs however a run ends

2026-11-05 05:41:18 +01:00 · 2026-10-30 23:50:41 +00:00
54 changed files with 1082 additions and 3488 deletions
@@ -33,7 +33,7 @@ jobs:
          working-directory: libs/sdk-py

      - name: Login to Docker Hub
-        uses: docker/login-action@81c6f93d4bc991e510b342a00b419b3bb4efc5c6 # v4
+        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4
        if: ${{ !github.event.pull_request.head.repo.fork }}
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -33,7 +33,7 @@ jobs:
          cache-suffix: test-${{ inputs.working-directory }}
          working-directory: ${{ inputs.working-directory }}
      - name: Login to Docker Hub
-        uses: docker/login-action@81c6f93d4bc991e510b342a00b419b3bb4efc5c6 # v4
+        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4
        if: ${{ !github.event.pull_request.head.repo.fork }}
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -31,7 +31,7 @@ jobs:
          cache-suffix: "test-langgraph"
          working-directory: libs/langgraph
      - name: Login to Docker Hub
-        uses: docker/login-action@81c6f93d4bc991e510b342a00b419b3bb4efc5c6 # v4
+        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4
        if: ${{ !github.event.pull_request.head.repo.fork }}
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -48,7 +48,7 @@ jobs:
        working-directory: ${{ inputs.working-directory }}

      - name: Upload build
-        uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: test-dist
          path: ${{ inputs.working-directory }}/dist/
@@ -76,13 +76,13 @@ jobs:
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

-      - uses: actions/download-artifact@9000827ccba6bdab643e8b6fd33ac0654aef8333 # v8.0.2
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
        with:
          name: test-dist
          path: ${{ inputs.working-directory }}/dist/

      - name: Publish to test PyPI
-        uses: pypa/gh-action-pypi-publish@7245906fb61fa33a13554f9d5fb856fe61758086 # release/v1
+        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # release/v1
        with:
          packages-dir: ${{ inputs.working-directory }}/dist/
          verbose: true
@@ -114,7 +114,7 @@ jobs:
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - name: Set up Python
-        uses: actions/setup-python@6d4fd22b20465ccc0f7354476588e8df7c9ca0e0 # v7.1.0
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
        with:
          python-version: "3.11"
      - name: Run check_sdk_methods script
@@ -33,7 +33,7 @@ jobs:
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

      - name: Setup Python
-        uses: actions/setup-python@6d4fd22b20465ccc0f7354476588e8df7c9ca0e0 # v7.1.0
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
        with:
          python-version: '3.11'

@@ -51,7 +51,7 @@ jobs:
        working-directory: ${{ inputs.working-directory }}

      - name: Upload build
-        uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: dist
          path: ${{ inputs.working-directory }}/dist/
@@ -167,7 +167,7 @@ jobs:
          enable-cache: false
          working-directory: ${{ inputs.working-directory }}

-      - uses: actions/download-artifact@9000827ccba6bdab643e8b6fd33ac0654aef8333 # v8.0.2
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
        with:
          name: dist
          path: ${{ inputs.working-directory }}/dist/
@@ -259,13 +259,13 @@ jobs:
          enable-cache: false
          working-directory: ${{ inputs.working-directory }}

-      - uses: actions/download-artifact@9000827ccba6bdab643e8b6fd33ac0654aef8333 # v8.0.2
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
        with:
          name: dist
          path: ${{ inputs.working-directory }}/dist/

      - name: Publish package distributions to PyPI
-        uses: pypa/gh-action-pypi-publish@7245906fb61fa33a13554f9d5fb856fe61758086 # release/v1
+        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # release/v1
        with:
          packages-dir: ${{ inputs.working-directory }}/dist/
          verbose: true
@@ -301,7 +301,7 @@ jobs:
          enable-cache: false
          working-directory: ${{ inputs.working-directory }}

-      - uses: actions/download-artifact@9000827ccba6bdab643e8b6fd33ac0654aef8333 # v8.0.2
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
        with:
          name: dist
          path: ${{ inputs.working-directory }}/dist/
@@ -55,7 +55,7 @@ jobs:
    steps:
      - name: Generate GitHub App token
        id: app-token
-        uses: actions/create-github-app-token@64ab729a6294000f5aa4a4bc0b73d1f32bc45510 # v3.3.0
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
        with:
          app-id: ${{ secrets.ORG_MEMBERSHIP_APP_ID }}
          private-key: ${{ secrets.ORG_MEMBERSHIP_APP_PRIVATE_KEY }}
@@ -190,7 +190,7 @@ jobs:
    steps:
      - name: Generate GitHub App token
        id: app-token
-        uses: actions/create-github-app-token@64ab729a6294000f5aa4a4bc0b73d1f32bc45510 # v3.3.0
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
        with:
          app-id: ${{ secrets.ORG_MEMBERSHIP_APP_ID }}
          private-key: ${{ secrets.ORG_MEMBERSHIP_APP_PRIVATE_KEY }}
@@ -40,7 +40,7 @@ jobs:
    steps:
      - name: Generate GitHub App token
        id: app-token
-        uses: actions/create-github-app-token@64ab729a6294000f5aa4a4bc0b73d1f32bc45510 # v3.3.0
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
        with:
          app-id: ${{ secrets.ORG_MEMBERSHIP_APP_ID }}
          private-key: ${{ secrets.ORG_MEMBERSHIP_APP_PRIVATE_KEY }}
@@ -1,5 +1,5 @@
 version = 1
-revision = 5
+revision = 3
 requires-python = ">=3.10"

 [[package]]
@@ -686,7 +686,7 @@ wheels = [

 [[package]]
 name = "pytest"
-version = "9.2.0"
+version = "9.1.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "colorama", marker = "sys_platform == 'win32'" },
@@ -697,23 +697,23 @@ dependencies = [
    { name = "pygments" },
    { name = "tomli", marker = "python_full_version < '3.11'" },
 ]
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+sdist = { url = "https://files.pythonhosted.org/packages/e4/47/b9efed96c114afcfa3c9d3fe98a76a1d14c74a9e266d397cf6eb64be5e01/pytest-9.1.1.tar.gz", hash = "sha256:1088fbde8f2b49d95a549a195707afa7a76a3ce9bcadc26b6d71f0ffda5fe313", size = 1636369, upload-time = "2026-06-19T10:58:32.857Z" }
 wheels = [
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+    { url = "https://files.pythonhosted.org/packages/24/25/1de2678b631f5a49215c6c96fff41ba892b0a34df68d6d80292b1b48aa7f/pytest-9.1.1-py3-none-any.whl", hash = "sha256:37a86b45efb9a47a61a36449063e8e18d0cab3161329fc099eb21783169c4f0c", size = 386536, upload-time = "2026-06-19T10:58:31.347Z" },
 ]

 [[package]]
 name = "pytest-asyncio"
-version = "1.4.1"
+version = "1.4.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "backports-asyncio-runner", marker = "python_full_version < '3.11'" },
    { name = "pytest" },
    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
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+    { url = "https://files.pythonhosted.org/packages/03/e2/08a497ef684b88559c9cc5f4ad53a37e7b99e727094a86d6ea32536d5d3c/pytest_asyncio-1.4.0-py3-none-any.whl", hash = "sha256:933ca923a23075a87fb7070c0ec272a6848489824d887c85c812670932835aa1", size = 16930, upload-time = "2026-05-26T09:56:02.576Z" },
 ]

 [[package]]
@@ -809,27 +809,27 @@ wheels = [

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+    { url = "https://files.pythonhosted.org/packages/6d/1c/e6e91852b72566b1ab9aca504712857dfb89324c12092a5bd61d42d34427/ty-0.0.84-py3-none-win_arm64.whl", hash = "sha256:6c9d3718c4a0d318bc9c92af9b2aa85c3294e7dff54cf1d69ad79568f56516da", size = 13656453, upload-time = "2026-09-24T13:16:21.51Z" },
 ]

 [[package]]
@@ -1,7 +1,6 @@
 from __future__ import annotations

 import copy
-import json
 import logging
 from collections.abc import AsyncIterator, Collection, Iterator, Mapping, Sequence
 from typing import (
@@ -27,8 +26,6 @@ from langgraph.checkpoint.serde.types import (
    RESUME,
    SCHEDULED,
    ChannelProtocol,
-    LogAppend,
-    LogStep,
 )

 V = TypeVar("V", int, float, str)
@@ -185,93 +182,6 @@ class DeltaChannelHistory(TypedDict):
    seed: NotRequired[Any]


-class LogPage(NamedTuple):
-    """A page of a log channel, as returned by `BaseCheckpointSaver.read_log`.
-
-    !!! warning "Prototype"
-
-        Part of the transcript log prototype. Shape and semantics may change.
-    """
-
-    entries: list[tuple[int, Any]]
-    """`(position, entry)` pairs in path order. Entries are JSON values."""
-    length: int
-    """Number of committed entries on the path to the checkpoint's leaf."""
-    pending: list[Any]
-    """Entries written by finished tasks of the step in progress at the head,
-    not committed yet. Empty unless the checkpoint read is the thread's latest."""
-
-
-def log_range(
-    length: int, after: int | None, before: int | None, limit: int | None
-) -> tuple[int, int]:
-    """The position range `[lo, hi)` a `read_log` call asks for.
-
-    `after=p` starts after position `p`; `before=p` stops before it. With a
-    `limit`, a read with only `after` takes the first `limit` entries of the
-    range; any other read takes the last `limit` (chat UIs page from the end).
-    """
-    lo = 0 if after is None else max(after + 1, 0)
-    hi = length if before is None else min(before, length)
-    if limit is not None:
-        if after is not None and before is None:
-            hi = min(hi, lo + limit)
-        else:
-            lo = max(lo, hi - limit)
-    return lo, max(lo, hi)
-
-
-def _without_checkpoint_id(config: RunnableConfig) -> RunnableConfig:
-    conf = {k: v for k, v in config["configurable"].items() if k != "checkpoint_id"}
-    return {**config, "configurable": conf}
-
-
-def _pending_log_entries(tup: CheckpointTuple, channel: str) -> list[Any]:
-    return [
-        json.loads(text)
-        for _, ch, value in tup.pending_writes or ()
-        if ch == channel and isinstance(value, LogAppend)
-        for text in value.entries
-    ]
-
-
-def _step_entries(
-    step: LogStep, parent: CheckpointTuple | None, channel: str
-) -> list[str]:
-    """The JSON texts of one step: inline, or the `LogAppend` writes stored on
-    the checkpoint the step started from."""
-    if step.entries is not None:
-        texts = list(step.entries)
-    else:
-        texts = [
-            text
-            for _, ch, value in (parent.pending_writes or () if parent else ())
-            if ch == channel
-            and isinstance(value, LogAppend)
-            and value.start == step.start
-            for text in value.entries
-        ]
-    if len(texts) != step.count:
-        raise ValueError(
-            f"log channel {channel!r}: the step at position {step.start} "
-            f"committed {step.count} entries, found {len(texts)}"
-        )
-    return texts
-
-
-def _page_entries(
-    steps: Sequence[tuple[int, Sequence[str]]], lo: int, hi: int
-) -> list[tuple[int, Any]]:
-    """Positions `[lo, hi)` from steps given as `(start, texts)`, any order."""
-    out: list[tuple[int, Any]] = []
-    for start, texts in sorted(steps, key=lambda s: s[0]):
-        for i, text in enumerate(texts):
-            pos = start + i
-            if lo <= pos < hi:
-                out.append((pos, json.loads(text)))
-    return out
-
-
 def writes_sort_key(
    task_path: str, task_id: str = "", idx: int = 0
 ) -> tuple[str, str, int]:
@@ -321,14 +231,6 @@ class BaseCheckpointSaver(Generic[V]):

    serde: SerializerProtocol = JsonPlusSerializer()

-    supports_log: bool = False
-    """Whether this saver stores log channels natively (prototype).
-
-    A saver without native support still works: it stores `LogAppend` writes
-    and `LogStep` values like any other, and the default `read_log` walks the
-    parent chain to read them back.
-    """
-
    def __init__(
        self,
        *,
@@ -702,109 +604,6 @@ class BaseCheckpointSaver(Generic[V]):
        """
        raise NotImplementedError

-    def read_log(
-        self,
-        config: RunnableConfig,
-        channel: str,
-        *,
-        after: int | None = None,
-        before: int | None = None,
-        limit: int | None = None,
-    ) -> LogPage:
-        """Read a log channel as of the checkpoint `config` names (or the latest).
-
-        !!! warning "Prototype"
-
-            Part of the transcript log prototype. Shape and semantics may change.
-
-        The log as of a checkpoint is the path from the root to the leaf its
-        channel version points at. See `log_range` for `after`, `before` and
-        `limit`.
-
-        The default implementation walks the parent chain through `get_tuple`:
-        a step's entries are inline in its `LogStep`, or are the `LogAppend`
-        writes stored on the checkpoint the step started from. It is correct
-        and costs one `get_tuple` per checkpoint walked. Savers with direct
-        storage access override it with range reads.
-        """
-        tup = self.get_tuple(config)
-        if tup is None:
-            return LogPage([], 0, [])
-        latest = self.get_tuple(_without_checkpoint_id(tup.config))
-        is_head = latest is not None and latest.checkpoint["id"] == tup.checkpoint["id"]
-        pending = _pending_log_entries(tup, channel) if is_head else []
-        marker = tup.checkpoint["channel_values"].get(channel)
-        if not isinstance(marker, LogStep):
-            return LogPage([], 0, pending)
-        lo, hi = log_range(marker.end, after, before, limit)
-        steps: list[tuple[int, list[str]]] = []
-        cur: CheckpointTuple | None = tup
-        while cur is not None:
-            version = cur.checkpoint["channel_versions"].get(channel)
-            step = cur.checkpoint["channel_values"].get(channel)
-            if version is None or not isinstance(step, LogStep) or step.end <= lo:
-                break
-            # climb to the checkpoint that committed this version: later ones
-            # carry its marker without inline entries
-            parent = self.get_tuple(cur.parent_config) if cur.parent_config else None
-            while (
-                parent is not None
-                and parent.checkpoint["channel_versions"].get(channel) == version
-            ):
-                step = parent.checkpoint["channel_values"].get(channel, step)
-                parent = (
-                    self.get_tuple(parent.parent_config)
-                    if parent.parent_config
-                    else None
-                )
-            steps.append((step.start, _step_entries(step, parent, channel)))
-            cur = parent
-        return LogPage(_page_entries(steps, lo, hi), marker.end, pending)
-
-    async def aread_log(
-        self,
-        config: RunnableConfig,
-        channel: str,
-        *,
-        after: int | None = None,
-        before: int | None = None,
-        limit: int | None = None,
-    ) -> LogPage:
-        """Async version of `read_log`."""
-        tup = await self.aget_tuple(config)
-        if tup is None:
-            return LogPage([], 0, [])
-        latest = await self.aget_tuple(_without_checkpoint_id(tup.config))
-        is_head = latest is not None and latest.checkpoint["id"] == tup.checkpoint["id"]
-        pending = _pending_log_entries(tup, channel) if is_head else []
-        marker = tup.checkpoint["channel_values"].get(channel)
-        if not isinstance(marker, LogStep):
-            return LogPage([], 0, pending)
-        lo, hi = log_range(marker.end, after, before, limit)
-        steps: list[tuple[int, list[str]]] = []
-        cur: CheckpointTuple | None = tup
-        while cur is not None:
-            version = cur.checkpoint["channel_versions"].get(channel)
-            step = cur.checkpoint["channel_values"].get(channel)
-            if version is None or not isinstance(step, LogStep) or step.end <= lo:
-                break
-            parent = (
-                await self.aget_tuple(cur.parent_config) if cur.parent_config else None
-            )
-            while (
-                parent is not None
-                and parent.checkpoint["channel_versions"].get(channel) == version
-            ):
-                step = parent.checkpoint["channel_values"].get(channel, step)
-                parent = (
-                    await self.aget_tuple(parent.parent_config)
-                    if parent.parent_config
-                    else None
-                )
-            steps.append((step.start, _step_entries(step, parent, channel)))
-            cur = parent
-        return LogPage(_page_entries(steps, lo, hi), marker.end, pending)
-
    def get_delta_channel_history(
        self, *, config: RunnableConfig, channels: Sequence[str]
    ) -> Mapping[str, DeltaChannelHistory]:
@@ -21,15 +21,12 @@ from langgraph.checkpoint.base import (
    CheckpointMetadata,
    CheckpointTuple,
    DeltaChannelHistory,
-    LogPage,
    PendingWrite,
    SerializerProtocol,
    get_checkpoint_id,
    get_checkpoint_metadata,
    writes_sort_key,
 )
-from langgraph.checkpoint.memory._log import InMemoryLog
-from langgraph.checkpoint.serde.types import LogAppend, LogStep

 logger = logging.getLogger(__name__)

@@ -69,8 +66,6 @@ class InMemorySaver(
        ```
    """

-    supports_log = True
-
    # thread ID ->  checkpoint NS -> checkpoint ID -> checkpoint mapping
    storage: defaultdict[
        str,
@@ -98,7 +93,6 @@ class InMemorySaver(
        self.storage = factory(lambda: defaultdict(dict))
        self.writes = factory(dict)
        self.blobs = factory()
-        self.log = InMemoryLog()
        self.stack = ExitStack()
        if factory is not defaultdict:
            self.stack.enter_context(self.storage)  # type: ignore[arg-type]
@@ -137,11 +131,6 @@ class InMemorySaver(
    ) -> dict[str, Any]:
        result: dict[str, Any] = {}
        for k, ver in versions.items():
-            if (
-                marker := self.log.marker(thread_id, checkpoint_ns, k, ver)
-            ) is not None:
-                result[k] = marker
-                continue
            kk = (thread_id, checkpoint_ns, k, ver)
            if kk not in self.blobs:
                continue
@@ -160,87 +149,6 @@ class InMemorySaver(
            for k in sorted(stored, key=lambda k: writes_sort_key(stored[k][3], *k))
        ]

-    def _pending_writes(
-        self, thread_id: str, checkpoint_ns: str, checkpoint_id: str
-    ) -> list[PendingWrite]:
-        """A checkpoint's writes, including its uncommitted log writes, in
-        `writes_sort_key` order."""
-        stored = self.writes.get((thread_id, checkpoint_ns, checkpoint_id), {})
-        rows: list[tuple[tuple[str, str, int], PendingWrite]] = [
-            (
-                writes_sort_key(v[3], *k),
-                (v[0], v[1], self.serde.loads_typed(v[2])),
-            )
-            for k, v in stored.items()
-        ]
-        for task_path, task_id, channel, idx, value in self.log.pending_writes(
-            thread_id, checkpoint_ns, checkpoint_id
-        ):
-            rows.append(
-                (writes_sort_key(task_path, task_id, idx), (task_id, channel, value))
-            )
-        rows.sort(key=lambda r: r[0])
-        return [w for _, w in rows]
-
-    def _version(
-        self,
-        thread_id: str,
-        checkpoint_ns: str,
-        checkpoint_id: str | None,
-        channel: str,
-    ) -> Any:
-        if checkpoint_id is None:
-            return None
-        saved = (
-            self.storage.get(thread_id, {}).get(checkpoint_ns, {}).get(checkpoint_id)
-        )
-        if saved is None:
-            return None
-        version = self.serde.loads_typed(saved[0])["channel_versions"].get(channel)
-        if (thread_id, checkpoint_ns, channel, version) in self.blobs:
-            # stored before the field became a log channel: its log is empty
-            return None
-        return version
-
-    def read_log(
-        self,
-        config: RunnableConfig,
-        channel: str,
-        *,
-        after: int | None = None,
-        before: int | None = None,
-        limit: int | None = None,
-    ) -> LogPage:
-        """Read a log channel with range reads over its segment chain."""
-        thread_id = config["configurable"]["thread_id"]
-        checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
-        ns_storage = self.storage.get(thread_id, {}).get(checkpoint_ns, {})
-        latest = max(ns_storage, default=None)
-        checkpoint_id = get_checkpoint_id(config) or latest
-        if checkpoint_id is None or checkpoint_id not in ns_storage:
-            return LogPage([], 0, [])
-        return self.log.read(
-            thread_id,
-            checkpoint_ns,
-            channel,
-            self._version(thread_id, checkpoint_ns, checkpoint_id, channel),
-            checkpoint_id if checkpoint_id == latest else None,
-            after=after,
-            before=before,
-            limit=limit,
-        )
-
-    async def aread_log(
-        self,
-        config: RunnableConfig,
-        channel: str,
-        *,
-        after: int | None = None,
-        before: int | None = None,
-        limit: int | None = None,
-    ) -> LogPage:
-        return self.read_log(config, channel, after=after, before=before, limit=limit)
-
    def get_delta_channel_history(
        self, *, config: RunnableConfig, channels: Sequence[str]
    ) -> Mapping[str, DeltaChannelHistory]:
@@ -347,6 +255,7 @@ class InMemorySaver(
        if checkpoint_id := get_checkpoint_id(config):
            if saved := self.storage[thread_id][checkpoint_ns].get(checkpoint_id):
                checkpoint, metadata, parent_checkpoint_id = saved
+                writes = self._ordered_writes(thread_id, checkpoint_ns, checkpoint_id)
                checkpoint_: Checkpoint = self.serde.loads_typed(checkpoint)
                return CheckpointTuple(
                    config=config,
@@ -357,9 +266,9 @@ class InMemorySaver(
                        ),
                    },
                    metadata=self.serde.loads_typed(metadata),
-                    pending_writes=self._pending_writes(
-                        thread_id, checkpoint_ns, checkpoint_id
-                    ),
+                    pending_writes=[
+                        (id, c, self.serde.loads_typed(v)) for id, c, v, _ in writes
+                    ],
                    parent_config=(
                        {
                            "configurable": {
@@ -376,6 +285,7 @@ class InMemorySaver(
            if checkpoints := self.storage[thread_id][checkpoint_ns]:
                checkpoint_id = max(checkpoints.keys())
                checkpoint, metadata, parent_checkpoint_id = checkpoints[checkpoint_id]
+                writes = self._ordered_writes(thread_id, checkpoint_ns, checkpoint_id)
                checkpoint_ = self.serde.loads_typed(checkpoint)
                return CheckpointTuple(
                    config={
@@ -392,9 +302,9 @@ class InMemorySaver(
                        ),
                    },
                    metadata=self.serde.loads_typed(metadata),
-                    pending_writes=self._pending_writes(
-                        thread_id, checkpoint_ns, checkpoint_id
-                    ),
+                    pending_writes=[
+                        (id, c, self.serde.loads_typed(v)) for id, c, v, _ in writes
+                    ],
                    parent_config=(
                        {
                            "configurable": {
@@ -478,6 +388,10 @@ class InMemorySaver(
                    elif limit is not None:
                        limit -= 1

+                    writes = self._ordered_writes(
+                        thread_id, checkpoint_ns, checkpoint_id
+                    )
+
                    checkpoint_: Checkpoint = self.serde.loads_typed(checkpoint)

                    yield CheckpointTuple(
@@ -508,9 +422,9 @@ class InMemorySaver(
                            if parent_checkpoint_id
                            else None
                        ),
-                        pending_writes=self._pending_writes(
-                            thread_id, checkpoint_ns, checkpoint_id
-                        ),
+                        pending_writes=[
+                            (id, c, self.serde.loads_typed(v)) for id, c, v, _ in writes
+                        ],
                    )

    def put(
@@ -537,22 +451,8 @@ class InMemorySaver(
        c = checkpoint.copy()
        thread_id = config["configurable"]["thread_id"]
        checkpoint_ns = config["configurable"]["checkpoint_ns"]
-        parent_id = config["configurable"].get("checkpoint_id")
        values: dict[str, Any] = c.pop("channel_values")  # type: ignore[misc]
        for k, v in new_versions.items():
-            if isinstance(values.get(k), LogStep):
-                # a log channel: the step row is its "blob" at this version
-                self.log.put_step(
-                    thread_id,
-                    checkpoint_ns,
-                    k,
-                    self._version(thread_id, checkpoint_ns, parent_id, k),
-                    parent_id,
-                    checkpoint["id"],
-                    v,
-                    values[k],
-                )
-                continue
            self.blobs[(thread_id, checkpoint_ns, k, v)] = (
                self.serde.dumps_typed(values[k]) if k in values else ("empty", b"")
            )
@@ -600,19 +500,6 @@ class InMemorySaver(
        outer_key = (thread_id, checkpoint_ns, checkpoint_id)
        outer_writes_ = self.writes.get(outer_key)
        for idx, (c, v) in enumerate(writes):
-            if isinstance(v, LogAppend):
-                self.log.put_append(
-                    thread_id,
-                    checkpoint_ns,
-                    c,
-                    self._version(thread_id, checkpoint_ns, checkpoint_id, c),
-                    checkpoint_id,
-                    task_id,
-                    task_path,
-                    idx,
-                    v,
-                )
-                continue
            inner_key = (task_id, WRITES_IDX_MAP.get(c, idx))
            if inner_key[1] >= 0 and outer_writes_ and inner_key in outer_writes_:
                continue
@@ -641,72 +528,6 @@ class InMemorySaver(
        for k in list(self.blobs.keys()):
            if k[0] == thread_id:
                del self.blobs[k]
-        self.log.delete_thread(thread_id)
-
-    def copy_thread(self, source_thread_id: str, target_thread_id: str) -> None:
-        """Copy all checkpoints, writes, blobs and log rows to another thread."""
-        for ns, checkpoints in self.storage.get(source_thread_id, {}).items():
-            self.storage[target_thread_id][ns] = dict(checkpoints)
-        for (t, ns, cid), rows in list(self.writes.items()):
-            if t == source_thread_id:
-                self.writes[(target_thread_id, ns, cid)] = dict(rows)
-        for (t, ns, ch, ver), blob in list(self.blobs.items()):
-            if t == source_thread_id:
-                self.blobs[(target_thread_id, ns, ch, ver)] = blob
-        self.log.copy_thread(source_thread_id, target_thread_id)
-
-    def prune(
-        self, thread_ids: Sequence[str], *, strategy: str = "keep_latest"
-    ) -> None:
-        """Prune checkpoints; the log keeps what remaining checkpoints reach.
-
-        `"keep_latest"` keeps the latest checkpoint per namespace, `"delete"`
-        deletes every checkpoint. Writes and blobs no remaining checkpoint
-        uses are deleted with them.
-        """
-        if strategy not in ("keep_latest", "delete"):
-            raise ValueError(f"Unknown prune strategy: {strategy}")
-        for thread_id in thread_ids:
-            keep = {
-                ns: ({max(cps)} if strategy == "keep_latest" and cps else set())
-                for ns, cps in self.storage.get(thread_id, {}).items()
-            }
-            self._retain(thread_id, keep)
-
-    def delete_for_runs(self, run_ids: Sequence[str]) -> None:
-        """Delete the checkpoints the given runs created; the log keeps what
-        the remaining checkpoints reach."""
-        runs = set(run_ids)
-        for thread_id, namespaces in list(self.storage.items()):
-            keep = {
-                ns: {
-                    cid
-                    for cid, saved in cps.items()
-                    if self.serde.loads_typed(saved[1]).get("run_id") not in runs
-                }
-                for ns, cps in namespaces.items()
-            }
-            self._retain(thread_id, keep)
-
-    def _retain(self, thread_id: str, keep: dict[str, set[str]]) -> None:
-        namespaces = self.storage.get(thread_id, {})
-        for ns, cps in list(namespaces.items()):
-            for cid in [c for c in cps if c not in keep.get(ns, set())]:
-                del cps[cid]
-                self.writes.pop((thread_id, ns, cid), None)
-        used = {
-            (thread_id, ns, ch, ver)
-            for ns, cps in namespaces.items()
-            for saved in cps.values()
-            for ch, ver in self.serde.loads_typed(saved[0])["channel_versions"].items()
-        }
-        for k in [k for k in self.blobs if k[0] == thread_id and k not in used]:
-            del self.blobs[k]
-        self.log.collect(
-            thread_id,
-            {ns: dict.fromkeys(cps) for ns, cps in namespaces.items()},
-            lambda ns, cid, ch: self._version(thread_id, ns, cid, ch),
-        )

    async def aget_tuple(self, config: RunnableConfig) -> CheckpointTuple | None:
        """Asynchronous version of `get_tuple`.
@@ -798,17 +619,6 @@ class InMemorySaver(
        """
        return self.delete_thread(thread_id)

-    async def acopy_thread(self, source_thread_id: str, target_thread_id: str) -> None:
-        return self.copy_thread(source_thread_id, target_thread_id)
-
-    async def aprune(
-        self, thread_ids: Sequence[str], *, strategy: str = "keep_latest"
-    ) -> None:
-        return self.prune(thread_ids, strategy=strategy)
-
-    async def adelete_for_runs(self, run_ids: Sequence[str]) -> None:
-        return self.delete_for_runs(run_ids)
-
    def get_next_version(self, current: str | None, channel: None) -> str:
        if current is None:
            current_v = 0
@@ -1,401 +0,0 @@
-"""Log channel storage for `InMemorySaver` (transcript log prototype).
-
-The reference implementation of the log storage design: entries stored once,
-keyed in path order; one step row per committing channel version; segments
-for linear runs, with parent pointers between them. Reads are range reads
-over a segment chain, and lifecycle is reachability from the checkpoints that
-remain.
-
-Rows, per `(thread_id, checkpoint_ns, channel)`:
-
- segment: `seg -> (parent_seg | None, fork_pos)`
- step: `version -> StepRow(seg, start, count, batch)`, unique on `(seg, start)`
- entry: `seg -> {(start, batch, task_path, task_id, idx, j): json_text}`
-
-`batch` names the execution that wrote a step's entries: the checkpoint the
-step started from for entries that came through `put_writes`, the committing
-checkpoint for entries a `LogStep` carried inline.
-"""
-
-from __future__ import annotations
-
-import json
-import threading
-import uuid
-from collections import defaultdict
-from collections.abc import Callable, Iterable
-from dataclasses import dataclass, field
-from typing import Any
-
-from langgraph.checkpoint.base import LogPage, log_range, writes_sort_key
-from langgraph.checkpoint.serde.types import LogAppend, LogStep
-
-_SEGMENT_NS = uuid.UUID("6f6c6f67-0000-4000-8000-6c6f67736567")
-
-EntryKey = tuple[int, str, str, str, int, int]
-
-
-@dataclass
-class StepRow:
-    seg: str
-    start: int
-    count: int
-    batch: str
-    exec: str
-
-    @property
-    def end(self) -> int:
-        return self.start + self.count
-
-
-@dataclass
-class ChannelLog:
-    segments: dict[str, tuple[str | None, int]] = field(default_factory=dict)
-    steps: dict[str, StepRow] = field(default_factory=dict)
-    step_at: dict[tuple[str, int], str] = field(default_factory=dict)
-    entries: defaultdict[str, dict[EntryKey, str]] = field(
-        default_factory=lambda: defaultdict(dict)
-    )
-    batch_segments: defaultdict[str, list[str]] = field(
-        default_factory=lambda: defaultdict(list)
-    )
-
-    def copy(self) -> ChannelLog:
-        new = ChannelLog()
-        new.segments = dict(self.segments)
-        new.steps = {
-            v: StepRow(r.seg, r.start, r.count, r.batch, r.exec)
-            for v, r in self.steps.items()
-        }
-        new.step_at = dict(self.step_at)
-        for seg, rows in self.entries.items():
-            new.entries[seg] = dict(rows)
-        for batch, segs in self.batch_segments.items():
-            new.batch_segments[batch] = list(segs)
-        return new
-
-    # -- structure ---------------------------------------------------------
-
-    def committed(self, seg: str) -> bool:
-        return any(s == seg for s, _ in self.step_at)
-
-    def tip(self, seg: str) -> int:
-        ends = [self.steps[v].end for (s, _), v in self.step_at.items() if s == seg]
-        return max(ends) if ends else self.segments[seg][1]
-
-    def chain(self, seg: str, upto: int) -> list[tuple[str, int]]:
-        """`(segment, upto)` pairs from the leaf's segment to the root."""
-        out: list[tuple[str, int]] = []
-        cur: str | None = seg
-        while cur is not None:
-            out.append((cur, upto))
-            cur, upto = self.segments[cur]
-        return out
-
-    def segment_for(self, leaf: tuple[str | None, int], batch: str, exec_: str) -> str:
-        """The fork rule: continue the leaf's segment if the leaf is its tip;
-        otherwise use a new segment forking at the leaf, reusing one this
-        batch already started and nothing committed to."""
-        seg, end = leaf
-        if seg is not None and self.tip(seg) == end:
-            return seg
-        for cand in self.batch_segments.get(batch, ()):
-            if self.segments[cand] == leaf and not self.committed(cand):
-                return cand
-        new = str(
-            uuid.uuid5(
-                _SEGMENT_NS, f"{batch}:{exec_}:{len(self.batch_segments[batch])}"
-            )
-        )
-        self.segments[new] = leaf
-        self.batch_segments[batch].append(new)
-        return new
-
-    def step_texts(self, seg: str, start: int, batch: str) -> list[str]:
-        rows = self.entries.get(seg, {})
-        keys = sorted(
-            (k for k in rows if k[0] == start and k[1] == batch),
-            key=lambda k: (writes_sort_key(k[2], k[3], k[4]), k[5]),
-        )
-        return [rows[k] for k in keys]
-
-    def replace_write(
-        self,
-        seg: str,
-        start: int,
-        batch: str,
-        task_path: str,
-        task_id: str,
-        idx: int,
-        texts: Iterable[str],
-    ) -> None:
-        rows = self.entries[seg]
-        for k in [k for k in rows if k[:5] == (start, batch, task_path, task_id, idx)]:
-            del rows[k]
-        for j, text in enumerate(texts):
-            rows[(start, batch, task_path, task_id, idx, j)] = text
-
-    def is_committed_step(self, seg: str, start: int, batch: str) -> bool:
-        v = self.step_at.get((seg, start))
-        return v is not None and self.steps[v].batch == batch
-
-    def pending(self, batch: str) -> list[tuple[str, str, int, LogAppend, str]]:
-        """Uncommitted writes stored under `batch`, as
-        `(task_path, task_id, idx, LogAppend, exec)`, in write order."""
-        groups: dict[tuple[str, int, str, str, int], list[tuple[int, str]]] = (
-            defaultdict(list)
-        )
-        for seg, rows in self.entries.items():
-            for (start, b, task_path, task_id, idx, j), text in rows.items():
-                if b != batch or self.is_committed_step(seg, start, b):
-                    continue
-                groups[(seg, start, task_path, task_id, idx)].append((j, text))
-        out = []
-        for (_, start, task_path, task_id, idx), items in groups.items():
-            texts = tuple(t for _, t in sorted(items))
-            out.append((task_path, task_id, idx, LogAppend(start, texts), ""))
-        out.sort(key=lambda w: writes_sort_key(w[0], w[1], w[2]))
-        return out
-
-
-class InMemoryLog:
-    """Log storage for one `InMemorySaver`."""
-
-    def __init__(self) -> None:
-        self.logs: dict[tuple[str, str, str], ChannelLog] = {}
-        self.lock = threading.RLock()
-
-    def _log(self, thread_id: str, ns: str, channel: str) -> ChannelLog:
-        key = (thread_id, ns, channel)
-        if key not in self.logs:
-            self.logs[key] = ChannelLog()
-        return self.logs[key]
-
-    def is_log_version(
-        self, thread_id: str, ns: str, channel: str, version: Any
-    ) -> bool:
-        log = self.logs.get((thread_id, ns, channel))
-        return log is not None and version in log.steps
-
-    def marker(
-        self, thread_id: str, ns: str, channel: str, version: Any
-    ) -> LogStep | None:
-        log = self.logs.get((thread_id, ns, channel))
-        if log is None or version not in log.steps:
-            return None
-        row = log.steps[version]
-        return LogStep(row.start, row.count, row.exec)
-
-    def leaf(
-        self, thread_id: str, ns: str, channel: str, version: Any
-    ) -> tuple[str | None, int]:
-        if version is None:
-            return (None, 0)
-        log = self.logs.get((thread_id, ns, channel))
-        if log is None or version not in log.steps:
-            raise ValueError(
-                f"log channel {channel!r}: version {version} has no step row"
-            )
-        row = log.steps[version]
-        return (row.seg, row.end)
-
-    # -- writes ------------------------------------------------------------
-
-    def put_append(
-        self,
-        thread_id: str,
-        ns: str,
-        channel: str,
-        parent_version: Any,
-        batch: str,
-        task_id: str,
-        task_path: str,
-        idx: int,
-        value: LogAppend,
-    ) -> None:
-        with self.lock:
-            log = self._log(thread_id, ns, channel)
-            leaf = self.leaf(thread_id, ns, channel, parent_version)
-            if value.start != leaf[1]:
-                raise ValueError(
-                    f"log channel {channel!r}: append at {value.start}, but the "
-                    f"checkpoint's log has {leaf[1]} entries"
-                )
-            seg = log.segment_for(leaf, batch, value.exec)
-            if log.is_committed_step(seg, value.start, batch):
-                return  # already committed: a reused write, nothing to do
-            log.replace_write(
-                seg, value.start, batch, task_path, task_id, idx, value.entries
-            )
-
-    def put_step(
-        self,
-        thread_id: str,
-        ns: str,
-        channel: str,
-        parent_version: Any,
-        parent_id: str | None,
-        checkpoint_id: str,
-        version: Any,
-        step: LogStep,
-    ) -> None:
-        with self.lock:
-            log = self._log(thread_id, ns, channel)
-            leaf = self.leaf(thread_id, ns, channel, parent_version)
-            if step.start != leaf[1]:
-                raise ValueError(
-                    f"log channel {channel!r}: step starts at {step.start}, but "
-                    f"the parent checkpoint's log has {leaf[1]} entries"
-                )
-            inline = step.entries is not None
-            batch = checkpoint_id if inline or parent_id is None else parent_id
-            seg = log.segment_for(leaf, batch, step.exec)
-            if inline:
-                log.replace_write(seg, step.start, batch, "", "", 0, step.entries)
-            texts = log.step_texts(seg, step.start, batch)
-            if len(texts) != step.count:
-                raise ValueError(
-                    f"log channel {channel!r}: the step at {step.start} commits "
-                    f"{step.count} entries, but {len(texts)} were written"
-                )
-            existing = log.step_at.get((seg, step.start))
-            if existing is not None and existing != version:
-                raise ValueError(
-                    f"log channel {channel!r}: position {step.start} of segment "
-                    f"{seg} was already committed by another step (concurrent "
-                    "writers on one checkpoint)"
-                )
-            log.steps[version] = StepRow(seg, step.start, step.count, batch, step.exec)
-            log.step_at[(seg, step.start)] = version
-
-    # -- reads -------------------------------------------------------------
-
-    def read(
-        self,
-        thread_id: str,
-        ns: str,
-        channel: str,
-        version: Any,
-        batch: str | None,
-        *,
-        after: int | None,
-        before: int | None,
-        limit: int | None,
-    ) -> LogPage:
-        with self.lock:
-            log = self.logs.get((thread_id, ns, channel))
-            pending: list[Any] = []
-            if log is not None and batch is not None:
-                pending = [
-                    json.loads(text)
-                    for *_, value, _ in log.pending(batch)
-                    for text in value.entries
-                ]
-            if log is None or version is None or version not in log.steps:
-                return LogPage([], 0, pending)
-            row = log.steps[version]
-            lo, hi = log_range(row.end, after, before, limit)
-            out: list[tuple[int, Any]] = []
-            for seg, upto in log.chain(row.seg, row.end):
-                if upto <= lo:
-                    break
-                starts = sorted(s for (sg, s) in log.step_at if sg == seg and s < upto)
-                for start in starts:
-                    srow = log.steps[log.step_at[(seg, start)]]
-                    if srow.end <= lo or srow.start >= hi:
-                        continue
-                    texts = log.step_texts(seg, start, srow.batch)
-                    if len(texts) != srow.count:
-                        raise ValueError(
-                            f"log channel {channel!r}: step at {start} has "
-                            f"{len(texts)} entries, expected {srow.count}"
-                        )
-                    for i, text in enumerate(texts):
-                        if lo <= start + i < hi:
-                            out.append((start + i, json.loads(text)))
-            out.sort(key=lambda e: e[0])
-            return LogPage(out, row.end, pending)
-
-    def pending_writes(
-        self, thread_id: str, ns: str, checkpoint_id: str
-    ) -> list[tuple[str, str, str, int, LogAppend]]:
-        """Uncommitted log writes stored on a checkpoint, as
-        `(task_path, task_id, channel, idx, LogAppend)`."""
-        with self.lock:
-            out = []
-            for (t, n, channel), log in self.logs.items():
-                if t != thread_id or n != ns:
-                    continue
-                for task_path, task_id, idx, value, _ in log.pending(checkpoint_id):
-                    out.append((task_path, task_id, channel, idx, value))
-            return out
-
-    # -- lifecycle ---------------------------------------------------------
-
-    def delete_thread(self, thread_id: str) -> None:
-        with self.lock:
-            for key in [k for k in self.logs if k[0] == thread_id]:
-                del self.logs[key]
-
-    def copy_thread(self, source: str, target: str) -> None:
-        with self.lock:
-            for (t, ns, channel), log in list(self.logs.items()):
-                if t == source:
-                    self.logs[(target, ns, channel)] = log.copy()
-
-    def collect(
-        self,
-        thread_id: str,
-        remaining: dict[str, dict[str, Any]],
-        version_of: Callable[[str, str, str], Any],
-    ) -> None:
-        """Keep exactly what remaining checkpoints reach.
-
-        `remaining` maps each namespace to its remaining checkpoint ids;
-        `version_of(ns, checkpoint_id, channel)` returns a checkpoint's
-        version of a channel.
-        """
-        with self.lock:
-            for (t, ns, channel), log in list(self.logs.items()):
-                if t != thread_id:
-                    continue
-                cids = remaining.get(ns, {})
-                reach: dict[str, int] = {}
-                for cid in cids:
-                    version = version_of(ns, cid, channel)
-                    if version is None or version not in log.steps:
-                        continue
-                    row = log.steps[version]
-                    for seg, upto in log.chain(row.seg, row.end):
-                        reach[seg] = max(reach.get(seg, -1), upto)
-                kept_steps = {
-                    v: r
-                    for v, r in log.steps.items()
-                    if r.seg in reach and r.start < reach[r.seg]
-                }
-                kept_keys = {(r.seg, r.start, r.batch) for r in kept_steps.values()}
-                for seg in list(log.entries):
-                    rows = log.entries[seg]
-                    for k in list(rows):
-                        start, batch = k[0], k[1]
-                        if (seg, start, batch) in kept_keys:
-                            continue
-                        if batch in cids and not log.is_committed_step(
-                            seg, start, batch
-                        ):
-                            continue  # pending at a remaining checkpoint
-                        del rows[k]
-                    if not rows:
-                        del log.entries[seg]
-                log.steps = kept_steps
-                log.step_at = {(r.seg, r.start): v for v, r in kept_steps.items()}
-                live = set(reach) | set(log.entries)
-                log.segments = {s: p for s, p in log.segments.items() if s in live}
-                for batch in list(log.batch_segments):
-                    segs = [s for s in log.batch_segments[batch] if s in live]
-                    if segs:
-                        log.batch_segments[batch] = segs
-                    else:
-                        del log.batch_segments[batch]
-                if not log.steps and not log.entries:
-                    del self.logs[(t, ns, channel)]
@@ -34,8 +34,6 @@ from langgraph.checkpoint.serde import _msgpack as _lg_msgpack
 from langgraph.checkpoint.serde.base import SerializerProtocol
 from langgraph.checkpoint.serde.event_hooks import emit_serde_event
 from langgraph.checkpoint.serde.types import (
-    LogAppend,
-    LogStep,
    SendProtocol,
    _DeltaSnapshot,
 )
@@ -324,29 +322,11 @@ EXT_PYDANTIC_V1 = 4
 EXT_PYDANTIC_V2 = 5
 EXT_NUMPY_ARRAY = 6
 EXT_DELTA_SNAPSHOT = 7
-EXT_LOG_APPEND = 8
-EXT_LOG_STEP = 9


 def _msgpack_default(obj: Any) -> str | ormsgpack.Ext:
    if isinstance(obj, _DeltaSnapshot):
        return ormsgpack.Ext(EXT_DELTA_SNAPSHOT, _msgpack_enc(obj.value))
-    elif isinstance(obj, LogAppend):
-        return ormsgpack.Ext(
-            EXT_LOG_APPEND, _msgpack_enc([obj.start, list(obj.entries), obj.exec])
-        )
-    elif isinstance(obj, LogStep):
-        return ormsgpack.Ext(
-            EXT_LOG_STEP,
-            _msgpack_enc(
-                [
-                    obj.start,
-                    obj.count,
-                    obj.exec,
-                    None if obj.entries is None else list(obj.entries),
-                ]
-            ),
-        )
    elif hasattr(obj, "model_dump") and callable(obj.model_dump):  # pydantic v2
        return ormsgpack.Ext(
            EXT_PYDANTIC_V2,
@@ -679,14 +659,6 @@ def _create_msgpack_ext_hook(
                    data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
                )
            )
-        elif code == EXT_LOG_APPEND:
-            start, entries, exec_ = ormsgpack.unpackb(data)
-            return LogAppend(start, tuple(entries), exec_)
-        elif code == EXT_LOG_STEP:
-            start, count, exec_, entries = ormsgpack.unpackb(data)
-            return LogStep(
-                start, count, exec_, None if entries is None else tuple(entries)
-            )
        elif code == EXT_CONSTRUCTOR_SINGLE_ARG:
            tup = None
            try:
@@ -31,52 +31,6 @@ class _DeltaSnapshot(NamedTuple):
    value: Any


-class LogAppend(NamedTuple):
-    """One task write to a log channel, as handed to `put_writes`.
-
-    !!! warning "Prototype"
-
-        Part of the transcript log prototype. Shape and semantics may change.
-
-    `start` is the log's length at the checkpoint the step started from (the
-    position the step's entries begin at). `entries` are the appended entries
-    as JSON text, exactly as written. `exec` identifies the execution that
-    wrote them, so a log-aware saver can keep two executions from one
-    checkpoint apart.
-    """
-
-    start: int
-    entries: tuple[str, ...]
-    exec: str = ""
-
-
-class LogStep(NamedTuple):
-    """A log channel's value in a checkpoint: the step that produced its version.
-
-    !!! warning "Prototype"
-
-        Part of the transcript log prototype. Shape and semantics may change.
-
-    The step appended `count` entries starting at position `start`, so the
-    log as of the checkpoint has `start + count` entries. `entries` carries
-    the step's entries inline when they did not reach the saver through
-    `put_writes` (graph input, `update_state`, `durability="exit"`); it is
-    `None` when they did.
-    """
-
-    start: int
-    count: int
-    exec: str = ""
-    entries: tuple[str, ...] | None = None
-
-    @property
-    def end(self) -> int:
-        return self.start + self.count
-
-    def stripped(self) -> "LogStep":
-        return LogStep(self.start, self.count, self.exec, None)
-
-
 Value = TypeVar("Value", covariant=True)
 Update = TypeVar("Update", contravariant=True)
 C = TypeVar("C")
@@ -1,5 +1,5 @@
 version = 1
-revision = 5
+revision = 3
 requires-python = ">=3.10"
 resolution-markers = [
    "python_full_version >= '3.15'",
@@ -178,15 +178,6 @@ wheels = [
    { url = "https://files.pythonhosted.org/packages/c3/be/d0d44e092656fe7a06b55e6103cbce807cdbdee17884a5367c68c9860853/dataclasses_json-0.6.7-py3-none-any.whl", hash = "sha256:0dbf33f26c8d5305befd61b39d2b3414e8a407bedc2834dea9b8d642666fb40a", size = 28686, upload-time = "2024-06-09T16:20:16.715Z" },
 ]

-[[package]]
-name = "distro"
-version = "1.9.0"
-source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/fc/f8/98eea607f65de6527f8a2e8885fc8015d3e6f5775df186e443e0964a11c3/distro-1.9.0.tar.gz", hash = "sha256:2fa77c6fd8940f116ee1d6b94a2f90b13b5ea8d019b98bc8bafdcabcdd9bdbed", size = 60722, upload-time = "2023-12-24T09:54:32.31Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/12/b3/231ffd4ab1fc9d679809f356cebee130ac7daa00d6d6f3206dd4fd137e9e/distro-1.9.0-py3-none-any.whl", hash = "sha256:7bffd925d65168f85027d8da9af6bddab658135b840670a223589bc0c8ef02b2", size = 20277, upload-time = "2023-12-24T09:54:30.421Z" },
-]
-
 [[package]]
 name = "exceptiongroup"
 version = "1.3.1"
@@ -221,40 +212,6 @@ wheels = [
    { url = "https://files.pythonhosted.org/packages/7e/f5/f66802a942d491edb555dd61e3a9961140fd64c90bce1eafd741609d334d/httpcore-1.0.9-py3-none-any.whl", hash = "sha256:2d400746a40668fc9dec9810239072b40b4484b640a8c38fd654a024c7a1bf55", size = 78784, upload-time = "2025-04-24T22:06:20.566Z" },
 ]

-[[package]]
-name = "httpcore2"
-version = "2.14.0"
-source = { registry = "https://pypi.org/simple" }
-resolution-markers = [
-    "python_full_version < '3.11'",
-]
-dependencies = [
-    { name = "h11" },
-    { name = "truststore" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/30/ff/b53af1b49bb2cb5fa97c92215614b173ca5c1a99ded80e2d52f15a94fa6d/httpcore2-2.14.0.tar.gz", hash = "sha256:4f57a1a8249fe6af589d935cfd456f1d13bbdcb0f0fc72af9142368fc94811d7", size = 69096, upload-time = "2026-10-18T16:29:21.898Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/02/06/a8d6a8f90d11b76d9086242b6bb0ee4b503473bfc8be34c2d5b067275c22/httpcore2-2.14.0-py3-none-any.whl", hash = "sha256:4c4f64f4b544afeb778c42c0ffb5941b29e671157e90ed3f6dc787c4bca90cd1", size = 84291, upload-time = "2026-10-18T16:29:19.743Z" },
-]
-
-[[package]]
-name = "httpcore2"
-version = "2.16.0"
-source = { registry = "https://pypi.org/simple" }
-resolution-markers = [
-    "python_full_version >= '3.15'",
-    "python_full_version >= '3.12' and python_full_version < '3.15'",
-    "python_full_version == '3.11.*'",
-]
-dependencies = [
-    { name = "h11" },
-    { name = "truststore" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/c0/61/afa9d6b7452f9eca73f73d45324eb0bb52f098fd5e6049bf6b8263be9b4e/httpcore2-2.16.0.tar.gz", hash = "sha256:c72cd0413563b17e1cd8354677dff887466f8ec2551679759e93126534428643", size = 69886, upload-time = "2026-10-21T07:09:45.31Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/af/c2/ce417c397afa5181f0e3c6ff01a4d01639414e1adef08730d97571297151/httpcore2-2.16.0-py3-none-any.whl", hash = "sha256:5c4358319f2602d984ad93182c9fee5160f22e9da7babdda870a5e7c4e2dc34f", size = 85070, upload-time = "2026-10-21T07:09:42.802Z" },
-]
-
 [[package]]
 name = "httpx"
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 ]

 [[package]]
@@ -5,5 +5,5 @@ description = "Test for prerelease stuff"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-  "langgraph==1.2.19"
+  "langgraph==1.2.6"
 ]
@@ -7,7 +7,7 @@ requires-python = ">=3.10"
 dependencies = [
  "langchain-openai==1.1.14",
  "langchain-anthropic==1.4.6",
-  "langgraph==1.2.19"
+  "langgraph==1.2.6"
 ]

 [tool.uv]
@@ -21,8 +21,8 @@
    "test:all": "yarn test && yarn test:int && yarn lint:langgraph"
  },
  "dependencies": {
-    "@langchain/core": "^1.3.1",
-    "@langchain/langgraph": "^1.5.3"
+    "@langchain/core": "^1.2.13",
+    "@langchain/langgraph": "^1.4.18"
  },
  "resolutions": {
    "@langchain/langgraph-checkpoint": "1.0.4",
@@ -34,17 +34,17 @@
    "@eslint/js": "^10.0.1",
    "@tsconfig/recommended": "^1.0.13",
    "@types/jest": "^30.0.0",
-    "@typescript-eslint/eslint-plugin": "^8.72.1",
-    "@typescript-eslint/parser": "^8.72.1",
-    "dotenv": "^18.0.9",
-    "eslint": "^10.13.0",
+    "@typescript-eslint/eslint-plugin": "^8.70.1",
+    "@typescript-eslint/parser": "^8.70.1",
+    "dotenv": "^18.0.4",
+    "eslint": "^10.11.0",
    "eslint-config-prettier": "^10.1.8",
    "eslint-plugin-import": "^2.32.0",
    "eslint-plugin-no-instanceof": "^1.0.1",
-    "eslint-plugin-prettier": "^5.5.7",
+    "eslint-plugin-prettier": "^5.5.6",
    "jest": "^30.5.2",
-    "prettier": "^3.9.10",
-    "ts-jest": "^29.4.15",
+    "prettier": "^3.9.9",
+    "ts-jest": "^29.4.14",
    "typescript": "^7.0.2"
  }
 }
@@ -387,11 +387,6 @@
  resolved "https://registry.yarnpkg.com/@cfworker/json-schema/-/json-schema-4.1.1.tgz#4a2a3947ee9fa7b7c24be981422831b8674c3be6"
  integrity sha512-gAmrUZSGtKc3AiBL71iNWxDsyUC5uMaKKGdvzYsBoTW/xi42JQHl7eKV2OYzCUqvc+D2RCcf7EXY2iCyFIk6og==

-"@dual-bundle/import-meta-resolve@^4.2.1":
-  version "4.2.1"
-  resolved "https://registry.yarnpkg.com/@dual-bundle/import-meta-resolve/-/import-meta-resolve-4.2.1.tgz#cd0b25b3808cd9e684cd6cd549bbf8e1dcf05ee7"
-  integrity sha512-id+7YRUgoUX6CgV0DtuhirQWodeeA7Lf4i2x71JS/vtA5pRb/hIGWlw+G6MeXvsM+MXrz0VAydTGElX1rAfgPg==
-
 "@emnapi/core@1.10.0":
  version "1.10.0"
  resolved "https://registry.yarnpkg.com/@emnapi/core/-/core-1.10.0.tgz#380ccc8f2412ea22d1d972df7f8ee23a3b9c7467"
@@ -895,50 +890,50 @@
  resolved "https://registry.yarnpkg.com/@keyv/serialize/-/serialize-1.1.1.tgz#0c01dd3a3483882af7cf3878d4e71d505c81fc4a"
  integrity sha512-dXn3FZhPv0US+7dtJsIi2R+c7qWYiReoEh5zUntWCf4oSpMNib8FDhSoed6m3QyZdx5hK7iLFkYk3rNxwt8vTA==

-"@langchain/core@^1.3.1":
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.3.1.tgz#f6cdb6d200def5c2e69d25ff4fef92612d1b7601"
-  integrity sha512-jt0miXWxNi+rbZLeSeZkc7BBYKnWopksoJSpB+P3zaYgzMMNwkAPWqnd1zSClfYGwLZPXQbbTtaqv8ZFXmE3FA==
+"@langchain/core@^1.2.13":
+  version "1.2.13"
+  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.2.13.tgz#4ea4eb0308a25af350f75de2fbf34aecb819177e"
+  integrity sha512-ADGTxZ84n3civruUX1LlTOdua/PDGoni2U6TmKTX7hvRU2Jlepu8vLJI4Wnwj45KUKhUCrW94Il12Q2bxE3e8A==
  dependencies:
    "@cfworker/json-schema" "^4.0.2"
    "@standard-schema/spec" "^1.1.0"
    js-tiktoken "^1.0.12"
-    langsmith ">=0.11.0 <1.0.0"
+    langsmith ">=0.5.0 <1.0.0"
    mustache "^4.2.0"
    p-queue "^6.6.2"
    zod "^3.25.76 || ^4"

-"@langchain/langgraph-checkpoint@1.0.4", "@langchain/langgraph-checkpoint@^1.2.1":
+"@langchain/langgraph-checkpoint@1.0.4", "@langchain/langgraph-checkpoint@^1.1.5":
  version "1.0.4"
  resolved "https://registry.yarnpkg.com/@langchain/langgraph-checkpoint/-/langgraph-checkpoint-1.0.4.tgz#893aa7255b2fe810fdeb50281f6750a3b0a6fef7"
  integrity sha512-1y5MgZ0gXXrtmoy56e3kaBChI3GwFPIKl27xkrHwN+VE/3iUsyr9gO3Jtp7kdKAe6diZGbcas5bdC/r0yUwTZA==
  dependencies:
    uuid "^14.0.0"

-"@langchain/langgraph-sdk@~1.12.8":
-  version "1.12.9"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.12.9.tgz#b8e66e00af207f18e56eb6cd916c1ee8e7608745"
-  integrity sha512-A1LkLPVu00dj+9aErXPBLhmFURHtnnRO9KRFST+xAwurqQTa+LxC9ixxF7p+ZMo5P70qMFoaP8Ud2wuZmYD4xw==
+"@langchain/langgraph-sdk@~1.12.0":
+  version "1.12.0"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.12.0.tgz#b063a7eba0a66f51cbc841a824626a47eca1eec9"
+  integrity sha512-F3AOZjKZRUGmE3FzY+RaVZI6WzXOkwnuF7jqgto6rDPSnO9OdVdYGvwGDi3jjRGf5xLoDtX2dpsR9z5KptU+5A==
  dependencies:
-    "@langchain/protocol" "^0.0.20"
+    "@langchain/protocol" "^0.0.19"
    "@types/json-schema" "^7.0.15"
    p-queue "^9.0.1"
    p-retry "^7.1.1"

-"@langchain/langgraph@^1.5.3":
-  version "1.5.3"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.5.3.tgz#9a921c9e099c2e3009f34987e0acb2645636bb74"
-  integrity sha512-cuqswNgfoF/J3/r9K5Qm7EnQc2f0mz7uWlAAs751KWhoK8sKfmuLABghF4b1LYq1NpK72XG1x8lWPyg45M8BOA==
+"@langchain/langgraph@^1.4.18":
+  version "1.4.18"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.4.18.tgz#c8cc4ea734834262fdb00ae6a45a0849620e4fd2"
+  integrity sha512-yrMMJ9hk2NVMD2xU2WoVrgFawAU6s/RzEl/dX9BhlyxZHazo1wHY35z4K2BIBzTUh4z3giCzrUoqRAqW2CWpWg==
  dependencies:
-    "@langchain/langgraph-checkpoint" "^1.2.1"
-    "@langchain/langgraph-sdk" "~1.12.8"
-    "@langchain/protocol" "^0.0.20"
+    "@langchain/langgraph-checkpoint" "^1.1.5"
+    "@langchain/langgraph-sdk" "~1.12.0"
+    "@langchain/protocol" "^0.0.19"
    "@standard-schema/spec" "1.1.0"

-"@langchain/protocol@^0.0.20":
-  version "0.0.20"
-  resolved "https://registry.yarnpkg.com/@langchain/protocol/-/protocol-0.0.20.tgz#441a57a6176f634306d9214da65d35033355d5e9"
-  integrity sha512-sxlkDG2/HGyjDFLTJ8B/o3oglRjOv8iLCFgrV0550/Vym3V6RZ0SUjAQFe8jrLQw8ZXjERy3swJp5OODBSrUYA==
+"@langchain/protocol@^0.0.19":
+  version "0.0.19"
+  resolved "https://registry.yarnpkg.com/@langchain/protocol/-/protocol-0.0.19.tgz#7fe43fed115dc34b3b4c246e8d5283fbcbfab7b0"
+  integrity sha512-9hKcRrH7cBX6gfutdfXPoft1OCchHe4FEpALoDJMl5Qu+n/YG5ynZmyu8+8cxORlPwHBoKTxggvXz+76M1yX1Q==

 "@napi-rs/wasm-runtime@^1.1.4":
  version "1.2.3"
@@ -1185,100 +1180,110 @@
  dependencies:
    "@types/yargs-parser" "*"

-"@typescript-eslint/eslint-plugin@^8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.72.1.tgz#95e29de63ce7ed793eb1c6efd9f8b802ce808262"
-  integrity sha512-5CokTWXpmbylfFabsbvHC0CAw3XLaGnoa+nFJX5FR592h/LoZsENUE6p/rg5xvkKrFEXz6pYmgI29AgXc2N3BQ==
+"@typescript-eslint/eslint-plugin@^8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.70.1.tgz#d404bac4cb04e4dcd20086e46e13c952bd0771e0"
+  integrity sha512-nDNrUQ/4ruSNYbu749TRY7cfrzPtoLHEXSNBI8aaNY32LlZCajixqRf3FqcKC4p5Cam4VOHYx/t+i5+nKXvrqA==
  dependencies:
    "@eslint-community/regexpp" "^4.12.2"
-    "@typescript-eslint/scope-manager" "8.72.1"
-    "@typescript-eslint/type-utils" "8.72.1"
-    "@typescript-eslint/utils" "8.72.1"
-    "@typescript-eslint/visitor-keys" "8.72.1"
+    "@typescript-eslint/scope-manager" "8.70.1"
+    "@typescript-eslint/type-utils" "8.70.1"
+    "@typescript-eslint/utils" "8.70.1"
+    "@typescript-eslint/visitor-keys" "8.70.1"
    ignore "^7.0.5"
    natural-compare "^1.4.0"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/parser@^8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.72.1.tgz#7370b68dadc3819b9aac68ea340bd8b43ee62379"
-  integrity sha512-ZGwZP4OCfyA0AQTpEAMWz+rtX01DRhQWW5hB0ucKDEIX5U7jdmPSaMx94rQfaPAQzIYz2BimOgKOJtjfpRFQ9g==
+"@typescript-eslint/parser@^8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.70.1.tgz#6c99b7b954efc05dae179001c8b477d1a8948dcf"
+  integrity sha512-nO974WLllwhSFWQXnMLj6nDGa8f0khKEz1JzpPJ1u7Vm/4X1X6ZHajpoknU4bb41vJyMB0HHVyS2GqdhWfIXZw==
  dependencies:
-    "@typescript-eslint/scope-manager" "8.72.1"
-    "@typescript-eslint/types" "8.72.1"
-    "@typescript-eslint/typescript-estree" "8.72.1"
-    "@typescript-eslint/visitor-keys" "8.72.1"
+    "@typescript-eslint/scope-manager" "8.70.1"
+    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/typescript-estree" "8.70.1"
+    "@typescript-eslint/visitor-keys" "8.70.1"
    debug "^4.4.3"

-"@typescript-eslint/project-service@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.72.1.tgz#1d09902a9c23f6cfab779e5acc78a45abf540add"
-  integrity sha512-fAuVMkwdO/huI8nyo/WKnNKf6Gag93S56Rh3Ts5mGcavwSdaN8tRg1gCeIGX8PF+nzp1BjGfO4gHhGzW1J6jTg==
+"@typescript-eslint/project-service@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.70.1.tgz#d5635594cc8a573f0e15a772b1704e93a00134c1"
+  integrity sha512-62xOgboPfwc3/IgPSX/W6oQR3ZbF04194FPGUGH8HL8iLFHbt/456/8Ph1wLNUgVF+s94FlHoipBsz+v7+LMnA==
  dependencies:
-    "@typescript-eslint/tsconfig-utils" "^8.72.1"
-    "@typescript-eslint/types" "^8.72.1"
+    "@typescript-eslint/tsconfig-utils" "^8.70.1"
+    "@typescript-eslint/types" "^8.70.1"
    debug "^4.4.3"

-"@typescript-eslint/scope-manager@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.72.1.tgz#a0fb4dfe5aa2b0149b7a2d1fd00d947992b13067"
-  integrity sha512-lC/t6eMCZZQAAKZEYGL6RDVSuFehpdmMT6h+nJIjIa6oylN/PwDgDVtEIbB7O9xFfZYtZAYLoLlDNWKJhtF+uQ==
+"@typescript-eslint/scope-manager@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.70.1.tgz#0feeae4da2d279b960cdbfe5e0a02fbf1195e93f"
+  integrity sha512-Pa0EeSeAusQc1WbjQMac+YfenewYTBu0KjgYvkUKwhXaHUKbFog23Dm/rp0DX/6tyYOQ3Xl1a+3EcFNZynGHCw==
  dependencies:
-    "@typescript-eslint/types" "8.72.1"
-    "@typescript-eslint/visitor-keys" "8.72.1"
+    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/visitor-keys" "8.70.1"

-"@typescript-eslint/tsconfig-utils@8.72.1", "@typescript-eslint/tsconfig-utils@^8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.72.1.tgz#07394c85095ee38455e76bc221ba23650af73e44"
-  integrity sha512-e4D5R5vpeAEPBxT2BAzsFQL3sbwyeeeo5+aczgNSRK1V734jE7pTqaGFU+fXapWEQwnZbpFaTn32+Z8DwS6OTg==
+"@typescript-eslint/tsconfig-utils@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.70.1.tgz#e9353a6e5f3498a29b40946ca3e11f6166fef09e"
+  integrity sha512-jumze1fPI+sDOaM2TWGQdn39PDxTr7TZGeuyLkAbNyx2vtMT3uRnVKChN0hfht5V2TugphJzF6bYXvBcE09qqg==

-"@typescript-eslint/type-utils@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.72.1.tgz#f1f592f63bd9726de21191aae3ccf64a813914b8"
-  integrity sha512-iY2wlmyrXJmx4yxUGP3aYCFF3cA/6ShddOKmLU2dx7LnEykbAM8WThlxZEfd1NddqceF6eJmZUayxx9oKIYNlg==
+"@typescript-eslint/tsconfig-utils@^8.70.1":
+  version "8.71.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.71.0.tgz#83a69c9a514af8f5ff099cc6c0d609c273e8f039"
+  integrity sha512-Z1UlWHADEK2Mlb9NpWfDeSjqoZ5EyrOv4R3eQpbkzqn/EwaIdOpXXupEA1+0ZIOSJSZZDBHG0BrQyN8zUG6Pwg==
+
+"@typescript-eslint/type-utils@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.70.1.tgz#6ea36f2c7dc0776c1c8e1c380b4896f00bc4c27f"
+  integrity sha512-7zKTnyvaVWqzLZHPFQtX1hVHqgkMC+WebPWakNCSyrQVbIP1AM0L0TlBZtACldIRb6PptI8Odk+jyZ5kP3B1VA==
  dependencies:
-    "@typescript-eslint/types" "8.72.1"
-    "@typescript-eslint/typescript-estree" "8.72.1"
-    "@typescript-eslint/utils" "8.72.1"
+    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/typescript-estree" "8.70.1"
+    "@typescript-eslint/utils" "8.70.1"
    debug "^4.4.3"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/types@8.72.1", "@typescript-eslint/types@^8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.72.1.tgz#067d8f738c294611e33a1425ae43ac9b9c2f24e3"
-  integrity sha512-LmE5IhQet1BWOWEXqBrVtBPsMAOQ6Nzk35d+WLh3mk4EUF33sqlfxjio1MdYeSvKSG5skactKKuixBIKXhL4Rw==
+"@typescript-eslint/types@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.70.1.tgz#2022b9d07d057174eba25b9bbd289641d262a196"
+  integrity sha512-Dm1ypdhhrGCTyyehxElhgJ6kgk8MVCv5qXdoOVqPr1uqk42jX8KjrZqhROvdShczA8qrDoYiOWn1ykWlx2k81Q==

-"@typescript-eslint/typescript-estree@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.72.1.tgz#e93b9cc3a56bf12f5fed857bb8f4963cce7924ee"
-  integrity sha512-DAlUoUV93hIvrtIQLwCbmZQYVZwOMhiHJrOVUUIWicFZaIYjTRqlY3I/NZevfkLmSqkNHRu2qYDcq9lrn16oOQ==
+"@typescript-eslint/types@^8.70.1":
+  version "8.71.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.71.0.tgz#a230a121e71665060afe27d1f1ad110371f9451e"
+  integrity sha512-cJ4OoxPGWvFnBTnSZyaU+qJzGTqPTGJY+gDchj6cRyLRdmIdt4rcsE4twj+zPfrNiWuVi38wijHzShL++Z9atQ==
+
+"@typescript-eslint/typescript-estree@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.70.1.tgz#ced48fee6f7043835d2edfed9786ae74813a3c99"
+  integrity sha512-TU8PwyGN0PQJUcE96mw8eCQ44SmxGdQlJmlWakHaHQ15eIuuvye5yNtmh/i6oS88jzXVQB71xdNkbkB/fMwL0g==
  dependencies:
-    "@typescript-eslint/project-service" "8.72.1"
-    "@typescript-eslint/tsconfig-utils" "8.72.1"
-    "@typescript-eslint/types" "8.72.1"
-    "@typescript-eslint/visitor-keys" "8.72.1"
+    "@typescript-eslint/project-service" "8.70.1"
+    "@typescript-eslint/tsconfig-utils" "8.70.1"
+    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/visitor-keys" "8.70.1"
    debug "^4.4.3"
    minimatch "^10.2.2"
    semver "^7.7.3"
    tinyglobby "^0.2.15"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/utils@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.72.1.tgz#f210c1bf4a25aa1306df80c702ed30bbbc9b4d3d"
-  integrity sha512-5v5liypurJBFHCBNqh/RjsymAD+VWcE0djuGY/BUqp5fC3Qn+luWDEksjuTtWjPn6i5zQlUtkZCRG/CYG0yCkA==
+"@typescript-eslint/utils@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.70.1.tgz#6a97887cee702df513692f5cdc7f79baeef48e02"
+  integrity sha512-Esgul8MsnKnRLdYU2Eb2cRV9bS5HJYtKj1ByJnOzzG2M58DGdSUQ1jUuILxipqcpB2h9WLrbD5GijIWUjX/Tqw==
  dependencies:
    "@eslint-community/eslint-utils" "^4.9.1"
-    "@typescript-eslint/scope-manager" "8.72.1"
-    "@typescript-eslint/types" "8.72.1"
-    "@typescript-eslint/typescript-estree" "8.72.1"
+    "@typescript-eslint/scope-manager" "8.70.1"
+    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/typescript-estree" "8.70.1"

-"@typescript-eslint/visitor-keys@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.72.1.tgz#c7aec9883b44ef795f1b8200df81d9d44d355de7"
-  integrity sha512-SB8xqipSzZHUePCCLNeYxqnxq83X61/qzNhjQGbTfjxGZIeOEP7tBgWYX05Tcd6CgE02WdTJnh5b8kMZJ/+bnQ==
+"@typescript-eslint/visitor-keys@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.70.1.tgz#b4cde0ed16982bd963a6310fcae554f59fd14124"
+  integrity sha512-Vwj9lUIW5Xq3wQ9w6gv3R86g1hMK8f2zNOdGTAgeXUMMXFK78G9ruCjjqutHMNJc0+CH7LYRnHeUB9IT8wFmcw==
  dependencies:
-    "@typescript-eslint/types" "8.72.1"
+    "@typescript-eslint/types" "8.70.1"
    eslint-visitor-keys "^5.0.0"

 "@typescript/typescript-aix-ppc64@7.0.2":
@@ -2104,10 +2109,10 @@ doctrine@^2.1.0:
  dependencies:
    esutils "^2.0.2"

-dotenv@^18.0.9:
-  version "18.0.9"
-  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-18.0.9.tgz#5c565760ce7e6fb69f9477ebcd1a3b64c766f9c8"
-  integrity sha512-3fVOW4cB02R066PUSwn8O4TJyz9NckQl7F81blIbaq9jKBm2tSmOKky7ZHIXzGvkVPXCSn6jkpziBPZdGFs8Tw==
+dotenv@^18.0.4:
+  version "18.0.4"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-18.0.4.tgz#419bbe784f30915bfeb10e2d407e13ca5528504f"
+  integrity sha512-jGt9uI5BIxpVO15kvy+iEFqNAwxYClKWnkptLjSNPnFLC003Imd0ofr3aEVsbpHdSBdSsbcApNIlz4nbyGMwdA==

 dunder-proto@^1.0.0, dunder-proto@^1.0.1:
  version "1.0.1"
@@ -2425,13 +2430,13 @@ eslint-plugin-no-instanceof@^1.0.1:
  resolved "https://registry.yarnpkg.com/eslint-plugin-no-instanceof/-/eslint-plugin-no-instanceof-1.0.1.tgz#5d9fc86d160df6991b654b294a62390207f1bb97"
  integrity sha512-zlqQ7EsfzbRO68uI+p8FIE7zYB4njs+nNbkNjSb5QmLi2et67zQLqSeaao5U9SpnlZTTJC87nS2oyHo2ACtajw==

-eslint-plugin-prettier@^5.5.7:
-  version "5.5.7"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.7.tgz#ebef3acc2d664333b1356b717780198abc635398"
-  integrity sha512-WjHyn3GrFd+ZR0rzsLiM4zJZ35PZMOE0SUIxzGmnWNG0126yNfJKJzObmmkYDwHJfGlkz3PSlzyG9ez/LJntwg==
+eslint-plugin-prettier@^5.5.6:
+  version "5.5.6"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.6.tgz#363ebe4d769bce157ccdd8129ce3efd91dc62564"
+  integrity sha512-ifetmTcxWfz+4qRW3pH/ujdTq2jQIj59AxJMIN26K5avYgU8dxycUETQonWiW+wPrYXA0j3Try0l1CnwVQtDqQ==
  dependencies:
    prettier-linter-helpers "^1.0.1"
-    synckit "^0.12.3"
+    synckit "^0.11.13"

 eslint-scope@^9.1.2:
  version "9.1.2"
@@ -2458,10 +2463,10 @@ eslint-visitor-keys@^5.0.0, eslint-visitor-keys@^5.0.1:
  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-5.0.1.tgz#9e3c9489697824d2d4ce3a8ad12628f91e9f59be"
  integrity sha512-tD40eHxA35h0PEIZNeIjkHoDR4YjjJp34biM0mDvplBe//mB+IHCqHDGV7pxF+7MklTvighcCPPZC7ynWyjdTA==

-eslint@^10.13.0:
-  version "10.13.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.13.0.tgz#a8a4742648c0fa9131f429b509de5407682d4864"
-  integrity sha512-UohDjD4zSzEwhf58M3O7vc/ycc8O1I7dNlhtD0WxE8Px8EHNJKtUwzBqrzeGhisRuv2ag4sAYswszCJRgKXYUg==
+eslint@^10.11.0:
+  version "10.11.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.11.0.tgz#304d1591b7c6a327e3f64b4f550f99fda160ae20"
+  integrity sha512-P7a6UEEqb9G95MYAtqkmsTbVXIYyzIfl6NGOIJk162PaahFxFyeGcrlXYFSiagECg4sEm8IseJdZBKR3rx6MsQ==
  dependencies:
    "@eslint-community/eslint-utils" "^4.8.0"
    "@eslint-community/regexpp" "^4.12.2"
@@ -2861,7 +2866,7 @@ graceful-fs@^4.2.11:
  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.11.tgz#4183e4e8bf08bb6e05bbb2f7d2e0c8f712ca40e3"
  integrity sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==

-handlebars@^4.7.10:
+handlebars@^4.7.9:
  version "4.7.10"
  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.7.10.tgz#12419ea1b41391b3ffcf003f2164dcbce090c417"
  integrity sha512-P5VJMVM7qgBn6vjXMw8WG9uVI+ncf2pi72j4de4yz5ZULLj2RGqLYaKOYGsgyrViQ0tePOVlN1tDCCXXtFqXKg==
@@ -3849,10 +3854,10 @@ keyv@^5.6.0:
  dependencies:
    "@keyv/serialize" "^1.1.1"

-"langsmith@>=0.11.0 <1.0.0":
-  version "0.11.6"
-  resolved "https://registry.yarnpkg.com/langsmith/-/langsmith-0.11.6.tgz#cdc0f89a14632f8b172deea5daa1ee625f7442c3"
-  integrity sha512-5hfJM5DEZpXFxUS3U9nY2CMyBRmFnhkJj7znUODJ8vsr/Jx38tGJl4GIhV484xAY7yQFWrFOTDr33PB95kHUKg==
+"langsmith@>=0.5.0 <1.0.0":
+  version "0.6.3"
+  resolved "https://registry.yarnpkg.com/langsmith/-/langsmith-0.6.3.tgz#a3d8ad58d66a47d3697e3c69b2be3f6df5233190"
+  integrity sha512-pXrQ4/4myQvjFFOAUmt5pWRrLEZR20gzIJD7MNdUH+5/S5nLI4ZRBo/SYKC6coaYj9pYTfQdBIzcs+3kfJ5uDA==
  dependencies:
    p-queue "6.6.2"

@@ -4307,10 +4312,10 @@ prettier-linter-helpers@^1.0.1:
  dependencies:
    fast-diff "^1.1.2"

-prettier@^3.9.10:
-  version "3.9.10"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.9.10.tgz#ac378e432f1a7381518f2e080816bbaefa38d585"
-  integrity sha512-skGHTH1Yb9QvaTC4hWnRTzEYtCpApF0UMBPz+t/0ZPzP8ihefo/btKd+QA7pUE0fEwA1SbS/NmhyEcstdXOIdA==
+prettier@^3.9.9:
+  version "3.9.9"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.9.9.tgz#09b826918c91cd4cbc80e0cbd1d2a922ff04f233"
+  integrity sha512-Z/CJHIkdujO/OtN7nXUii0Rf3VT5SRuhjBA82Xvu2XhBUgX3nhP67T0LHceBdQLex7OOFGTox+Q5Yg8Jk2Qivg==

 pretty-format@30.2.0, pretty-format@^30.0.0:
  version "30.2.0"
@@ -4754,21 +4759,13 @@ supports-preserve-symlinks-flag@^1.0.0:
  resolved "https://registry.yarnpkg.com/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz#6eda4bd344a3c94aea376d4cc31bc77311039e09"
  integrity sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w==

-synckit@^0.11.8:
+synckit@^0.11.13, synckit@^0.11.8:
  version "0.11.13"
  resolved "https://registry.yarnpkg.com/synckit/-/synckit-0.11.13.tgz#062a5ea57d81befc35892f8254de5c567e97c80a"
  integrity sha512-eNRKgb3z66Yp3D2CixVujOUvXLFUTij/zVnV8KRyvFdQwpz7I5DS8UfRkTeLzb64u+dkzDSdelE24izu+zSSUg==
  dependencies:
    "@pkgr/core" "^0.3.6"

-synckit@^0.12.3:
-  version "0.12.3"
-  resolved "https://registry.yarnpkg.com/synckit/-/synckit-0.12.3.tgz#6e30a3441d095ed04c311077350ce205465512d6"
-  integrity sha512-U+/AXT6LWsxnj2vz9HeUuPWBNgdWxjyIEjEPdbJARC9txmgPzo2VEdqnFo4hHaNyMPtycyVJrSaQYeQv/PoyyA==
-  dependencies:
-    "@dual-bundle/import-meta-resolve" "^4.2.1"
-    "@pkgr/core" "^0.3.6"
-
 test-exclude@^7.0.1:
  version "7.0.2"
  resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-7.0.2.tgz#482392077630bc57d5630c13abe908bb910dfc65"
@@ -4803,14 +4800,14 @@ ts-api-utils@^2.5.0:
  resolved "https://registry.yarnpkg.com/ts-api-utils/-/ts-api-utils-2.5.0.tgz#4acd4a155e22734990a5ed1fe9e97f113bcb37c1"
  integrity sha512-OJ/ibxhPlqrMM0UiNHJ/0CKQkoKF243/AEmplt3qpRgkW8VG7IfOS41h7V8TjITqdByHzrjcS/2si+y4lIh8NA==

-ts-jest@^29.4.15:
-  version "29.4.15"
-  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-29.4.15.tgz#238f2d495066a33ca973a54a36a5ef228262a9ad"
-  integrity sha512-s2qmEUYFRqbjz1wv0EmccNPVOb45HOFpFuhzQJLKShYVisuTbCFPIIAIV2EuK5rIxb4BejLDbH7dnBZfYjybUQ==
+ts-jest@^29.4.14:
+  version "29.4.14"
+  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-29.4.14.tgz#cb36c043df0fada861c8b604a5d514f953126180"
+  integrity sha512-+943G6wCX5E3VpzTQhBGBFntCmdT+QAkTvUlp03edTONFBvqskuXPhpyX16xdUotO4P5HQKyppldSWjocoltLQ==
  dependencies:
    bs-logger "^0.2.6"
    fast-json-stable-stringify "^2.1.0"
-    handlebars "^4.7.10"
+    handlebars "^4.7.9"
    json5 "^2.2.3"
    lodash.memoize "^4.1.2"
    make-error "^1.3.6"
@@ -9,8 +9,8 @@
  },
  "dependencies": {
    "@js-monorepo-example/shared": "*",
-    "@langchain/core": "^1.3.1",
-    "@langchain/langgraph": "^1.5.3"
+    "@langchain/core": "^1.2.13",
+    "@langchain/langgraph": "^1.4.18"
  },
  "devDependencies": {
    "typescript": "^7.0.2"
@@ -17,18 +17,18 @@
    "lint": "eslint 'apps/**/*.ts' 'libs/**/*.ts'"
  },
  "devDependencies": {
-    "turbo": "^2.11.10",
+    "turbo": "^2.11.5",
    "typescript": "^7.0.2",
    "@tsconfig/recommended": "^1.0.13",
    "@eslint/eslintrc": "^3.3.7",
    "@eslint/js": "^10.0.1",
-    "eslint": "^10.13.0",
+    "eslint": "^10.11.0",
    "eslint-config-prettier": "^10.1.8",
    "eslint-plugin-import": "^2.27.5",
    "eslint-plugin-no-instanceof": "^1.0.1",
-    "eslint-plugin-prettier": "^5.5.7",
-    "@typescript-eslint/eslint-plugin": "^8.72.1",
-    "@typescript-eslint/parser": "^8.72.1",
-    "prettier": "^3.9.10"
+    "eslint-plugin-prettier": "^5.5.6",
+    "@typescript-eslint/eslint-plugin": "^8.70.1",
+    "@typescript-eslint/parser": "^8.70.1",
+    "prettier": "^3.9.9"
  }
 }
@@ -25,11 +25,6 @@
  resolved "https://registry.yarnpkg.com/@cfworker/json-schema/-/json-schema-4.1.1.tgz#4a2a3947ee9fa7b7c24be981422831b8674c3be6"
  integrity sha512-gAmrUZSGtKc3AiBL71iNWxDsyUC5uMaKKGdvzYsBoTW/xi42JQHl7eKV2OYzCUqvc+D2RCcf7EXY2iCyFIk6og==

-"@dual-bundle/import-meta-resolve@^4.2.1":
-  version "4.2.1"
-  resolved "https://registry.yarnpkg.com/@dual-bundle/import-meta-resolve/-/import-meta-resolve-4.2.1.tgz#cd0b25b3808cd9e684cd6cd549bbf8e1dcf05ee7"
-  integrity sha512-id+7YRUgoUX6CgV0DtuhirQWodeeA7Lf4i2x71JS/vtA5pRb/hIGWlw+G6MeXvsM+MXrz0VAydTGElX1rAfgPg==
-
 "@eslint-community/eslint-utils@^4.8.0", "@eslint-community/eslint-utils@^4.9.1":
  version "4.9.1"
  resolved "https://registry.yarnpkg.com/@eslint-community/eslint-utils/-/eslint-utils-4.9.1.tgz#4e90af67bc51ddee6cdef5284edf572ec376b595"
@@ -139,48 +134,48 @@
  resolved "https://registry.yarnpkg.com/@keyv/serialize/-/serialize-1.1.1.tgz#0c01dd3a3483882af7cf3878d4e71d505c81fc4a"
  integrity sha512-dXn3FZhPv0US+7dtJsIi2R+c7qWYiReoEh5zUntWCf4oSpMNib8FDhSoed6m3QyZdx5hK7iLFkYk3rNxwt8vTA==

-"@langchain/core@^1.3.1":
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.3.1.tgz#f6cdb6d200def5c2e69d25ff4fef92612d1b7601"
-  integrity sha512-jt0miXWxNi+rbZLeSeZkc7BBYKnWopksoJSpB+P3zaYgzMMNwkAPWqnd1zSClfYGwLZPXQbbTtaqv8ZFXmE3FA==
+"@langchain/core@^1.2.13":
+  version "1.2.13"
+  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.2.13.tgz#4ea4eb0308a25af350f75de2fbf34aecb819177e"
+  integrity sha512-ADGTxZ84n3civruUX1LlTOdua/PDGoni2U6TmKTX7hvRU2Jlepu8vLJI4Wnwj45KUKhUCrW94Il12Q2bxE3e8A==
  dependencies:
    "@cfworker/json-schema" "^4.0.2"
    "@standard-schema/spec" "^1.1.0"
    js-tiktoken "^1.0.12"
-    langsmith ">=0.11.0 <1.0.0"
+    langsmith ">=0.5.0 <1.0.0"
    mustache "^4.2.0"
    p-queue "^6.6.2"
    zod "^3.25.76 || ^4"

-"@langchain/langgraph-checkpoint@^1.2.1":
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-checkpoint/-/langgraph-checkpoint-1.2.2.tgz#cbfdf0d461385769665e26f70e41f1291ed1d37e"
-  integrity sha512-KL3nzi7I61ll5nANCQe5RoJ5SqTFrE+si9IK6k7IIj9OrPkIKT/Dz0w8CyJF+K7OEuJfA33HvPrZqfzzW1DXDA==
+"@langchain/langgraph-checkpoint@^1.1.5":
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-checkpoint/-/langgraph-checkpoint-1.1.5.tgz#c793177f9afcce31a1e9922f317f88fec1254282"
+  integrity sha512-BwDwl5VeTOh6CVuiIPgsUgfK51vTJDMSbFcSCUfjJWsl8/DPdK/mbv+ejxJstkSk/BlSPMP4JfXWcN6jD2ea2Q==

-"@langchain/langgraph-sdk@~1.12.8":
-  version "1.12.9"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.12.9.tgz#b8e66e00af207f18e56eb6cd916c1ee8e7608745"
-  integrity sha512-A1LkLPVu00dj+9aErXPBLhmFURHtnnRO9KRFST+xAwurqQTa+LxC9ixxF7p+ZMo5P70qMFoaP8Ud2wuZmYD4xw==
+"@langchain/langgraph-sdk@~1.12.0":
+  version "1.12.0"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.12.0.tgz#b063a7eba0a66f51cbc841a824626a47eca1eec9"
+  integrity sha512-F3AOZjKZRUGmE3FzY+RaVZI6WzXOkwnuF7jqgto6rDPSnO9OdVdYGvwGDi3jjRGf5xLoDtX2dpsR9z5KptU+5A==
  dependencies:
-    "@langchain/protocol" "^0.0.20"
+    "@langchain/protocol" "^0.0.19"
    "@types/json-schema" "^7.0.15"
    p-queue "^9.0.1"
    p-retry "^7.1.1"

-"@langchain/langgraph@^1.5.3":
-  version "1.5.3"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.5.3.tgz#9a921c9e099c2e3009f34987e0acb2645636bb74"
-  integrity sha512-cuqswNgfoF/J3/r9K5Qm7EnQc2f0mz7uWlAAs751KWhoK8sKfmuLABghF4b1LYq1NpK72XG1x8lWPyg45M8BOA==
+"@langchain/langgraph@^1.4.18":
+  version "1.4.18"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.4.18.tgz#c8cc4ea734834262fdb00ae6a45a0849620e4fd2"
+  integrity sha512-yrMMJ9hk2NVMD2xU2WoVrgFawAU6s/RzEl/dX9BhlyxZHazo1wHY35z4K2BIBzTUh4z3giCzrUoqRAqW2CWpWg==
  dependencies:
-    "@langchain/langgraph-checkpoint" "^1.2.1"
-    "@langchain/langgraph-sdk" "~1.12.8"
-    "@langchain/protocol" "^0.0.20"
+    "@langchain/langgraph-checkpoint" "^1.1.5"
+    "@langchain/langgraph-sdk" "~1.12.0"
+    "@langchain/protocol" "^0.0.19"
    "@standard-schema/spec" "1.1.0"

-"@langchain/protocol@^0.0.20":
-  version "0.0.20"
-  resolved "https://registry.yarnpkg.com/@langchain/protocol/-/protocol-0.0.20.tgz#441a57a6176f634306d9214da65d35033355d5e9"
-  integrity sha512-sxlkDG2/HGyjDFLTJ8B/o3oglRjOv8iLCFgrV0550/Vym3V6RZ0SUjAQFe8jrLQw8ZXjERy3swJp5OODBSrUYA==
+"@langchain/protocol@^0.0.19":
+  version "0.0.19"
+  resolved "https://registry.yarnpkg.com/@langchain/protocol/-/protocol-0.0.19.tgz#7fe43fed115dc34b3b4c246e8d5283fbcbfab7b0"
+  integrity sha512-9hKcRrH7cBX6gfutdfXPoft1OCchHe4FEpALoDJMl5Qu+n/YG5ynZmyu8+8cxORlPwHBoKTxggvXz+76M1yX1Q==

 "@pkgr/core@^0.3.6":
  version "0.3.6"
@@ -202,35 +197,35 @@
  resolved "https://registry.yarnpkg.com/@tsconfig/recommended/-/recommended-1.0.13.tgz#269fce3ad04ca70b93269ff44cca81b950f542da"
  integrity sha512-sySRuBfMKyKO/j2ZAhR8kSembhjuPEV4Ra3AHtmWLq51+iGaudr45crPSzNC5b7/Ctrh9dfUpBuTlYrH6rM58Q==

-"@turbo/darwin-64@2.11.10":
-  version "2.11.10"
-  resolved "https://registry.yarnpkg.com/@turbo/darwin-64/-/darwin-64-2.11.10.tgz#824aa74de92806ef2a21932b4148feaea98e8887"
-  integrity sha512-By4idRap5+nLnMuRzLB4qkOPRlvNdyY1ne4VJYDyUoUB11H94k7uif9mbe3JT8JSNXs1D68uMcBj6hJ/jMQRvA==
+"@turbo/darwin-64@2.11.5":
+  version "2.11.5"
+  resolved "https://registry.yarnpkg.com/@turbo/darwin-64/-/darwin-64-2.11.5.tgz#6ddc580c2b7d05e578ca1c06b3f61473f4b7b00e"
+  integrity sha512-KdY4y7BBjIisl+jAkb3FFaRjClGqHyaeHCcVcCT8LBzFFwUu6thgfxyRZAx0uL4KoxLmH+iOan8UhVf/aDDcaA==

-"@turbo/darwin-arm64@2.11.10":
-  version "2.11.10"
-  resolved "https://registry.yarnpkg.com/@turbo/darwin-arm64/-/darwin-arm64-2.11.10.tgz#e9de7c9b9eb2a428cd4fb63fb9826696107339a4"
-  integrity sha512-pyEYlVcuexOPa92p0Wlwl9YT1Is5D60lxN3ItWm3g30YLvFaUq86TF4BBWg5ZAc0uMTnrOzCvuCsOBTdzUWnRQ==
+"@turbo/darwin-arm64@2.11.5":
+  version "2.11.5"
+  resolved "https://registry.yarnpkg.com/@turbo/darwin-arm64/-/darwin-arm64-2.11.5.tgz#a756c67bb828cd00d03e909769dd39453c1f1e69"
+  integrity sha512-ToZDGi2u410+TfRtC/O1/LpujGgvNJoRBZnwVXob7oO0+3OSlwIO3zofXKUvwQvlba7a8ZXPyCZwufjAXd7f0w==

-"@turbo/linux-64@2.11.10":
-  version "2.11.10"
-  resolved "https://registry.yarnpkg.com/@turbo/linux-64/-/linux-64-2.11.10.tgz#e9f48a6383e7c6926a488f329343792de3ee537c"
-  integrity sha512-1tYeR/IDZ5HEdsb0jNq2L2xam5nMQ+g80tlV2BZmv4OFw+pMcUM0mMmUcfc5wXPPNHVNPuDMjh9Y8G8HgXPLZA==
+"@turbo/linux-64@2.11.5":
+  version "2.11.5"
+  resolved "https://registry.yarnpkg.com/@turbo/linux-64/-/linux-64-2.11.5.tgz#b95c05218aebb06c06e5f991d48c55b78dc5e005"
+  integrity sha512-Ub2d/nAbdWLaSytcEaPp1wm/YuIvHEIqNrCRMI/UgOGyFdOhgxm8VyWPAJilQWRYxYVrqEUoy2K5S5K8SG50rA==

-"@turbo/linux-arm64@2.11.10":
-  version "2.11.10"
-  resolved "https://registry.yarnpkg.com/@turbo/linux-arm64/-/linux-arm64-2.11.10.tgz#d76831f850d30ef386b221b8ee72270a5ee7e2ba"
-  integrity sha512-HuekQxvVGhUd46g1Im/DKdOtglHr4/gguZAvzEpPUgtxNkztSa8lWhQEGQ+EmPQ0n7w19qjThFU+OfEEd0uvlw==
+"@turbo/linux-arm64@2.11.5":
+  version "2.11.5"
+  resolved "https://registry.yarnpkg.com/@turbo/linux-arm64/-/linux-arm64-2.11.5.tgz#c7a1d1a44c8c8dcff4b72fbafe9a5059c8fb668a"
+  integrity sha512-JQjmGxp724Wuft9FAxPMtmBur1CEdUyxJ+FVoIvKkgj63rXHl9PYCWrsU2tMjVi609XTQ3M8vZD9Yc9qVAVYrw==

-"@turbo/windows-64@2.11.10":
-  version "2.11.10"
-  resolved "https://registry.yarnpkg.com/@turbo/windows-64/-/windows-64-2.11.10.tgz#fb29a315a112afac9f01a4a1ea7601b28f140f31"
-  integrity sha512-UJOP3BkbreY3/JlMgJR6ZiimxYIBn+c+B4tnBIxD0E9c3Estmk+XoVNVBNBottZLNRXe3/ScgOU4+/k8tIWysg==
+"@turbo/windows-64@2.11.5":
+  version "2.11.5"
+  resolved "https://registry.yarnpkg.com/@turbo/windows-64/-/windows-64-2.11.5.tgz#60bdaaa7e8ba32f32623b31a1c75f6c3db400a0c"
+  integrity sha512-AFkbPmXNd8XgCi/66YEHR2bVl3gtusXyDihTIVEPAuSB+7ulLmJePvz1unWPVKLHdbCTTIdKq2mpJ1B1e3lJXw==

-"@turbo/windows-arm64@2.11.10":
-  version "2.11.10"
-  resolved "https://registry.yarnpkg.com/@turbo/windows-arm64/-/windows-arm64-2.11.10.tgz#bac3077b0a39643043ece360ff1f4f2af9272106"
-  integrity sha512-xOkEjF3ws/b/YNlc+bvJHMYBn+vL+QbEISZFVi0qS+ImmhA1X3/gmNmBrjjIG3dg6aeN+n6gQitzSkXQ286qJQ==
+"@turbo/windows-arm64@2.11.5":
+  version "2.11.5"
+  resolved "https://registry.yarnpkg.com/@turbo/windows-arm64/-/windows-arm64-2.11.5.tgz#18bd5a0ad30c4e094995786bd78916b6de6b5c1c"
+  integrity sha512-52ziXYP3snGOxjv19xA3WL1WDKv9Q6uDAa/7EKIR5j4hocMlYURkrOHbJ2ZZI+VfPU5MwKpcGeRfHxHJu7Y/Pw==

 "@types/esrecurse@^4.3.1":
  version "4.3.1"
@@ -252,100 +247,110 @@
  resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
  integrity sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ==

-"@typescript-eslint/eslint-plugin@^8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.72.1.tgz#95e29de63ce7ed793eb1c6efd9f8b802ce808262"
-  integrity sha512-5CokTWXpmbylfFabsbvHC0CAw3XLaGnoa+nFJX5FR592h/LoZsENUE6p/rg5xvkKrFEXz6pYmgI29AgXc2N3BQ==
+"@typescript-eslint/eslint-plugin@^8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.70.1.tgz#d404bac4cb04e4dcd20086e46e13c952bd0771e0"
+  integrity sha512-nDNrUQ/4ruSNYbu749TRY7cfrzPtoLHEXSNBI8aaNY32LlZCajixqRf3FqcKC4p5Cam4VOHYx/t+i5+nKXvrqA==
  dependencies:
    "@eslint-community/regexpp" "^4.12.2"
-    "@typescript-eslint/scope-manager" "8.72.1"
-    "@typescript-eslint/type-utils" "8.72.1"
-    "@typescript-eslint/utils" "8.72.1"
-    "@typescript-eslint/visitor-keys" "8.72.1"
+    "@typescript-eslint/scope-manager" "8.70.1"
+    "@typescript-eslint/type-utils" "8.70.1"
+    "@typescript-eslint/utils" "8.70.1"
+    "@typescript-eslint/visitor-keys" "8.70.1"
    ignore "^7.0.5"
    natural-compare "^1.4.0"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/parser@^8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.72.1.tgz#7370b68dadc3819b9aac68ea340bd8b43ee62379"
-  integrity sha512-ZGwZP4OCfyA0AQTpEAMWz+rtX01DRhQWW5hB0ucKDEIX5U7jdmPSaMx94rQfaPAQzIYz2BimOgKOJtjfpRFQ9g==
+"@typescript-eslint/parser@^8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.70.1.tgz#6c99b7b954efc05dae179001c8b477d1a8948dcf"
+  integrity sha512-nO974WLllwhSFWQXnMLj6nDGa8f0khKEz1JzpPJ1u7Vm/4X1X6ZHajpoknU4bb41vJyMB0HHVyS2GqdhWfIXZw==
  dependencies:
-    "@typescript-eslint/scope-manager" "8.72.1"
-    "@typescript-eslint/types" "8.72.1"
-    "@typescript-eslint/typescript-estree" "8.72.1"
-    "@typescript-eslint/visitor-keys" "8.72.1"
+    "@typescript-eslint/scope-manager" "8.70.1"
+    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/typescript-estree" "8.70.1"
+    "@typescript-eslint/visitor-keys" "8.70.1"
    debug "^4.4.3"

-"@typescript-eslint/project-service@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.72.1.tgz#1d09902a9c23f6cfab779e5acc78a45abf540add"
-  integrity sha512-fAuVMkwdO/huI8nyo/WKnNKf6Gag93S56Rh3Ts5mGcavwSdaN8tRg1gCeIGX8PF+nzp1BjGfO4gHhGzW1J6jTg==
+"@typescript-eslint/project-service@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.70.1.tgz#d5635594cc8a573f0e15a772b1704e93a00134c1"
+  integrity sha512-62xOgboPfwc3/IgPSX/W6oQR3ZbF04194FPGUGH8HL8iLFHbt/456/8Ph1wLNUgVF+s94FlHoipBsz+v7+LMnA==
  dependencies:
-    "@typescript-eslint/tsconfig-utils" "^8.72.1"
-    "@typescript-eslint/types" "^8.72.1"
+    "@typescript-eslint/tsconfig-utils" "^8.70.1"
+    "@typescript-eslint/types" "^8.70.1"
    debug "^4.4.3"

-"@typescript-eslint/scope-manager@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.72.1.tgz#a0fb4dfe5aa2b0149b7a2d1fd00d947992b13067"
-  integrity sha512-lC/t6eMCZZQAAKZEYGL6RDVSuFehpdmMT6h+nJIjIa6oylN/PwDgDVtEIbB7O9xFfZYtZAYLoLlDNWKJhtF+uQ==
+"@typescript-eslint/scope-manager@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.70.1.tgz#0feeae4da2d279b960cdbfe5e0a02fbf1195e93f"
+  integrity sha512-Pa0EeSeAusQc1WbjQMac+YfenewYTBu0KjgYvkUKwhXaHUKbFog23Dm/rp0DX/6tyYOQ3Xl1a+3EcFNZynGHCw==
  dependencies:
-    "@typescript-eslint/types" "8.72.1"
-    "@typescript-eslint/visitor-keys" "8.72.1"
+    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/visitor-keys" "8.70.1"

-"@typescript-eslint/tsconfig-utils@8.72.1", "@typescript-eslint/tsconfig-utils@^8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.72.1.tgz#07394c85095ee38455e76bc221ba23650af73e44"
-  integrity sha512-e4D5R5vpeAEPBxT2BAzsFQL3sbwyeeeo5+aczgNSRK1V734jE7pTqaGFU+fXapWEQwnZbpFaTn32+Z8DwS6OTg==
+"@typescript-eslint/tsconfig-utils@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.70.1.tgz#e9353a6e5f3498a29b40946ca3e11f6166fef09e"
+  integrity sha512-jumze1fPI+sDOaM2TWGQdn39PDxTr7TZGeuyLkAbNyx2vtMT3uRnVKChN0hfht5V2TugphJzF6bYXvBcE09qqg==

-"@typescript-eslint/type-utils@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.72.1.tgz#f1f592f63bd9726de21191aae3ccf64a813914b8"
-  integrity sha512-iY2wlmyrXJmx4yxUGP3aYCFF3cA/6ShddOKmLU2dx7LnEykbAM8WThlxZEfd1NddqceF6eJmZUayxx9oKIYNlg==
+"@typescript-eslint/tsconfig-utils@^8.70.1":
+  version "8.71.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.71.0.tgz#83a69c9a514af8f5ff099cc6c0d609c273e8f039"
+  integrity sha512-Z1UlWHADEK2Mlb9NpWfDeSjqoZ5EyrOv4R3eQpbkzqn/EwaIdOpXXupEA1+0ZIOSJSZZDBHG0BrQyN8zUG6Pwg==
+
+"@typescript-eslint/type-utils@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.70.1.tgz#6ea36f2c7dc0776c1c8e1c380b4896f00bc4c27f"
+  integrity sha512-7zKTnyvaVWqzLZHPFQtX1hVHqgkMC+WebPWakNCSyrQVbIP1AM0L0TlBZtACldIRb6PptI8Odk+jyZ5kP3B1VA==
  dependencies:
-    "@typescript-eslint/types" "8.72.1"
-    "@typescript-eslint/typescript-estree" "8.72.1"
-    "@typescript-eslint/utils" "8.72.1"
+    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/typescript-estree" "8.70.1"
+    "@typescript-eslint/utils" "8.70.1"
    debug "^4.4.3"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/types@8.72.1", "@typescript-eslint/types@^8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.72.1.tgz#067d8f738c294611e33a1425ae43ac9b9c2f24e3"
-  integrity sha512-LmE5IhQet1BWOWEXqBrVtBPsMAOQ6Nzk35d+WLh3mk4EUF33sqlfxjio1MdYeSvKSG5skactKKuixBIKXhL4Rw==
+"@typescript-eslint/types@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.70.1.tgz#2022b9d07d057174eba25b9bbd289641d262a196"
+  integrity sha512-Dm1ypdhhrGCTyyehxElhgJ6kgk8MVCv5qXdoOVqPr1uqk42jX8KjrZqhROvdShczA8qrDoYiOWn1ykWlx2k81Q==

-"@typescript-eslint/typescript-estree@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.72.1.tgz#e93b9cc3a56bf12f5fed857bb8f4963cce7924ee"
-  integrity sha512-DAlUoUV93hIvrtIQLwCbmZQYVZwOMhiHJrOVUUIWicFZaIYjTRqlY3I/NZevfkLmSqkNHRu2qYDcq9lrn16oOQ==
+"@typescript-eslint/types@^8.70.1":
+  version "8.71.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.71.0.tgz#a230a121e71665060afe27d1f1ad110371f9451e"
+  integrity sha512-cJ4OoxPGWvFnBTnSZyaU+qJzGTqPTGJY+gDchj6cRyLRdmIdt4rcsE4twj+zPfrNiWuVi38wijHzShL++Z9atQ==
+
+"@typescript-eslint/typescript-estree@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.70.1.tgz#ced48fee6f7043835d2edfed9786ae74813a3c99"
+  integrity sha512-TU8PwyGN0PQJUcE96mw8eCQ44SmxGdQlJmlWakHaHQ15eIuuvye5yNtmh/i6oS88jzXVQB71xdNkbkB/fMwL0g==
  dependencies:
-    "@typescript-eslint/project-service" "8.72.1"
-    "@typescript-eslint/tsconfig-utils" "8.72.1"
-    "@typescript-eslint/types" "8.72.1"
-    "@typescript-eslint/visitor-keys" "8.72.1"
+    "@typescript-eslint/project-service" "8.70.1"
+    "@typescript-eslint/tsconfig-utils" "8.70.1"
+    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/visitor-keys" "8.70.1"
    debug "^4.4.3"
    minimatch "^10.2.2"
    semver "^7.7.3"
    tinyglobby "^0.2.15"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/utils@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.72.1.tgz#f210c1bf4a25aa1306df80c702ed30bbbc9b4d3d"
-  integrity sha512-5v5liypurJBFHCBNqh/RjsymAD+VWcE0djuGY/BUqp5fC3Qn+luWDEksjuTtWjPn6i5zQlUtkZCRG/CYG0yCkA==
+"@typescript-eslint/utils@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.70.1.tgz#6a97887cee702df513692f5cdc7f79baeef48e02"
+  integrity sha512-Esgul8MsnKnRLdYU2Eb2cRV9bS5HJYtKj1ByJnOzzG2M58DGdSUQ1jUuILxipqcpB2h9WLrbD5GijIWUjX/Tqw==
  dependencies:
    "@eslint-community/eslint-utils" "^4.9.1"
-    "@typescript-eslint/scope-manager" "8.72.1"
-    "@typescript-eslint/types" "8.72.1"
-    "@typescript-eslint/typescript-estree" "8.72.1"
+    "@typescript-eslint/scope-manager" "8.70.1"
+    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/typescript-estree" "8.70.1"

-"@typescript-eslint/visitor-keys@8.72.1":
-  version "8.72.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.72.1.tgz#c7aec9883b44ef795f1b8200df81d9d44d355de7"
-  integrity sha512-SB8xqipSzZHUePCCLNeYxqnxq83X61/qzNhjQGbTfjxGZIeOEP7tBgWYX05Tcd6CgE02WdTJnh5b8kMZJ/+bnQ==
+"@typescript-eslint/visitor-keys@8.70.1":
+  version "8.70.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.70.1.tgz#b4cde0ed16982bd963a6310fcae554f59fd14124"
+  integrity sha512-Vwj9lUIW5Xq3wQ9w6gv3R86g1hMK8f2zNOdGTAgeXUMMXFK78G9ruCjjqutHMNJc0+CH7LYRnHeUB9IT8wFmcw==
  dependencies:
-    "@typescript-eslint/types" "8.72.1"
+    "@typescript-eslint/types" "8.70.1"
    eslint-visitor-keys "^5.0.0"

 "@typescript/typescript-aix-ppc64@7.0.2":
@@ -885,13 +890,13 @@ eslint-plugin-no-instanceof@^1.0.1:
  resolved "https://registry.yarnpkg.com/eslint-plugin-no-instanceof/-/eslint-plugin-no-instanceof-1.0.1.tgz#5d9fc86d160df6991b654b294a62390207f1bb97"
  integrity sha512-zlqQ7EsfzbRO68uI+p8FIE7zYB4njs+nNbkNjSb5QmLi2et67zQLqSeaao5U9SpnlZTTJC87nS2oyHo2ACtajw==

-eslint-plugin-prettier@^5.5.7:
-  version "5.5.7"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.7.tgz#ebef3acc2d664333b1356b717780198abc635398"
-  integrity sha512-WjHyn3GrFd+ZR0rzsLiM4zJZ35PZMOE0SUIxzGmnWNG0126yNfJKJzObmmkYDwHJfGlkz3PSlzyG9ez/LJntwg==
+eslint-plugin-prettier@^5.5.6:
+  version "5.5.6"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.6.tgz#363ebe4d769bce157ccdd8129ce3efd91dc62564"
+  integrity sha512-ifetmTcxWfz+4qRW3pH/ujdTq2jQIj59AxJMIN26K5avYgU8dxycUETQonWiW+wPrYXA0j3Try0l1CnwVQtDqQ==
  dependencies:
    prettier-linter-helpers "^1.0.1"
-    synckit "^0.12.3"
+    synckit "^0.11.13"

 eslint-scope@^9.1.2:
  version "9.1.2"
@@ -918,10 +923,10 @@ eslint-visitor-keys@^5.0.0, eslint-visitor-keys@^5.0.1:
  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-5.0.1.tgz#9e3c9489697824d2d4ce3a8ad12628f91e9f59be"
  integrity sha512-tD40eHxA35h0PEIZNeIjkHoDR4YjjJp34biM0mDvplBe//mB+IHCqHDGV7pxF+7MklTvighcCPPZC7ynWyjdTA==

-eslint@^10.13.0:
-  version "10.13.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.13.0.tgz#a8a4742648c0fa9131f429b509de5407682d4864"
-  integrity sha512-UohDjD4zSzEwhf58M3O7vc/ycc8O1I7dNlhtD0WxE8Px8EHNJKtUwzBqrzeGhisRuv2ag4sAYswszCJRgKXYUg==
+eslint@^10.11.0:
+  version "10.11.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.11.0.tgz#304d1591b7c6a327e3f64b4f550f99fda160ae20"
+  integrity sha512-P7a6UEEqb9G95MYAtqkmsTbVXIYyzIfl6NGOIJk162PaahFxFyeGcrlXYFSiagECg4sEm8IseJdZBKR3rx6MsQ==
  dependencies:
    "@eslint-community/eslint-utils" "^4.8.0"
    "@eslint-community/regexpp" "^4.12.2"
@@ -1471,10 +1476,10 @@ keyv@^5.6.0:
  dependencies:
    "@keyv/serialize" "^1.1.1"

-"langsmith@>=0.11.0 <1.0.0":
-  version "0.11.6"
-  resolved "https://registry.yarnpkg.com/langsmith/-/langsmith-0.11.6.tgz#cdc0f89a14632f8b172deea5daa1ee625f7442c3"
-  integrity sha512-5hfJM5DEZpXFxUS3U9nY2CMyBRmFnhkJj7znUODJ8vsr/Jx38tGJl4GIhV484xAY7yQFWrFOTDr33PB95kHUKg==
+"langsmith@>=0.5.0 <1.0.0":
+  version "0.7.1"
+  resolved "https://registry.yarnpkg.com/langsmith/-/langsmith-0.7.1.tgz#d721ad2e5211f9a5373e8a84eb4fed36b5621971"
+  integrity sha512-Wjk90UjNoY5cBHMlNAC/eZx5clI8jnjBOBW8uJu8+MWBtx0QesNjsUiLtjI+I3UnrpxFFpDqGXcnhBjH654Mqg==
  dependencies:
    p-queue "6.6.2"

@@ -1702,10 +1707,10 @@ prettier-linter-helpers@^1.0.1:
  dependencies:
    fast-diff "^1.1.2"

-prettier@^3.9.10:
-  version "3.9.10"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.9.10.tgz#ac378e432f1a7381518f2e080816bbaefa38d585"
-  integrity sha512-skGHTH1Yb9QvaTC4hWnRTzEYtCpApF0UMBPz+t/0ZPzP8ihefo/btKd+QA7pUE0fEwA1SbS/NmhyEcstdXOIdA==
+prettier@^3.9.9:
+  version "3.9.9"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.9.9.tgz#09b826918c91cd4cbc80e0cbd1d2a922ff04f233"
+  integrity sha512-Z/CJHIkdujO/OtN7nXUii0Rf3VT5SRuhjBA82Xvu2XhBUgX3nhP67T0LHceBdQLex7OOFGTox+Q5Yg8Jk2Qivg==

 punycode@^2.1.0:
  version "2.3.1"
@@ -1935,12 +1940,11 @@ supports-preserve-symlinks-flag@^1.0.0:
  resolved "https://registry.yarnpkg.com/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz#6eda4bd344a3c94aea376d4cc31bc77311039e09"
  integrity sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w==

-synckit@^0.12.3:
-  version "0.12.3"
-  resolved "https://registry.yarnpkg.com/synckit/-/synckit-0.12.3.tgz#6e30a3441d095ed04c311077350ce205465512d6"
-  integrity sha512-U+/AXT6LWsxnj2vz9HeUuPWBNgdWxjyIEjEPdbJARC9txmgPzo2VEdqnFo4hHaNyMPtycyVJrSaQYeQv/PoyyA==
+synckit@^0.11.13:
+  version "0.11.13"
+  resolved "https://registry.yarnpkg.com/synckit/-/synckit-0.11.13.tgz#062a5ea57d81befc35892f8254de5c567e97c80a"
+  integrity sha512-eNRKgb3z66Yp3D2CixVujOUvXLFUTij/zVnV8KRyvFdQwpz7I5DS8UfRkTeLzb64u+dkzDSdelE24izu+zSSUg==
  dependencies:
-    "@dual-bundle/import-meta-resolve" "^4.2.1"
    "@pkgr/core" "^0.3.6"

 tinyglobby@^0.2.15:
@@ -1966,17 +1970,17 @@ tsconfig-paths@^3.15.0:
    minimist "^1.2.6"
    strip-bom "^3.0.0"

-turbo@^2.11.10:
-  version "2.11.10"
-  resolved "https://registry.yarnpkg.com/turbo/-/turbo-2.11.10.tgz#8b1d40debab2b871ff9e908d6f3018aeda04879d"
-  integrity sha512-3GJYwig8ygEI89oaOZdduJX8/aw6O9eRPYHoIt6T3FZl9hkKjiyIspufJoVgqXihPoJu8M5CSV0DlZvzfohBCw==
+turbo@^2.11.5:
+  version "2.11.5"
+  resolved "https://registry.yarnpkg.com/turbo/-/turbo-2.11.5.tgz#e7223abd0555b978d3efe1b00ea9a98f43afb7ab"
+  integrity sha512-qLXheqz3TUvJpHIV6MUBwkNkvwKxMVG/QsimyiKT9DfNWPHJ294G/i5nDaH+fbHJt3UH7orubNNxAqYkbUNGAQ==
  optionalDependencies:
-    "@turbo/darwin-64" "2.11.10"
-    "@turbo/darwin-arm64" "2.11.10"
-    "@turbo/linux-64" "2.11.10"
-    "@turbo/linux-arm64" "2.11.10"
-    "@turbo/windows-64" "2.11.10"
-    "@turbo/windows-arm64" "2.11.10"
+    "@turbo/darwin-64" "2.11.5"
+    "@turbo/darwin-arm64" "2.11.5"
+    "@turbo/linux-64" "2.11.5"
+    "@turbo/linux-arm64" "2.11.5"
+    "@turbo/windows-64" "2.11.5"
+    "@turbo/windows-arm64" "2.11.5"

 type-check@^0.4.0, type-check@~0.4.0:
  version "0.4.0"
@@ -2431,6 +2431,7 @@ def _deploy_cmd(
    validate_deploy_commands(install_command, build_command)
    agent = None
    if agent_id is not None or environment is not None:
+        em.note("Note: --agent-id and --agent-environment flags are in private beta")
        if not agent_id or not agent_id.strip() or not environment:
            raise click.UsageError(
                "--agent-id and --agent-environment are required together."
@@ -85,8 +85,6 @@ def test_agent_create(deployment_api, tmp_path, monkeypatch):
    assert "name" not in payload
    assert build.call_args.kwargs["deployment_id"] == "runtime-id"
    assert "server-name" in result.output
-    assert "'langgraph deploy' is in beta" in result.output
-    assert "private beta" not in result.output
    assert (tmp_path / ".env").read_text() == "LANGSMITH_DEPLOYMENT_NAME=legacy\n"


@@ -250,7 +250,7 @@ wheels = [

 [[package]]
 name = "langgraph"
-version = "1.2.19"
+version = "1.2.11"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "langchain-core" },
@@ -260,9 +260,9 @@ dependencies = [
    { name = "pydantic" },
    { name = "xxhash" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/ba/10/329dc49ce3fc40e36faafd407f08607fe3fab75613e709a66758b53faac2/langgraph-1.2.19.tar.gz", hash = "sha256:4a00fa1aad2b5fc2d3a789a8e9eaf993f76218ca924b434902ecf1bbaaf300f6", size = 782618, upload-time = "2026-10-30T22:23:32.962Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/56/0d/c8e7ee98896659e1b6555db0ab115a9ca899844744645d5d894032bab1d7/langgraph-1.2.11.tar.gz", hash = "sha256:9ecfe11e50d338b34b15cf4d8a442642de103e8ae6971320efba84e4542eb363", size = 725753, upload-time = "2026-08-11T14:00:36.945Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/d7/9e/bd29e368fb16feea8d24270d377d56c34b49afea371717124f19cdfa890c/langgraph-1.2.19-py3-none-any.whl", hash = "sha256:6094a5cbed52a77d8c74c276fcd2056abde7b2836eab1c7a6b74bacbd1a269b3", size = 262285, upload-time = "2026-10-30T22:23:31.334Z" },
+    { url = "https://files.pythonhosted.org/packages/0a/7f/c5c30e4be99ff821029c7ac872a480676bb179c9f3df85ea3f38d13f86d4/langgraph-1.2.11-py3-none-any.whl", hash = "sha256:8bab70de7b2d00b5300fb289bcf38d8b241400f3184c1e95e8ce706fb0e8686b", size = 248854, upload-time = "2026-08-11T14:00:35.494Z" },
 ]

 [[package]]
@@ -308,7 +308,7 @@ wheels = [

 [[package]]
 name = "langgraph-sdk"
-version = "0.4.11"
+version = "0.4.4"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "httpx" },
@@ -317,9 +317,9 @@ dependencies = [
    { name = "orjson" },
    { name = "websockets" },
 ]
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+version = "1.2.3"
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-    { name = "distro" },
-    { name = "httpx2" },
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    { name = "requests" },
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-
 [[package]]
 name = "sse-starlette"
 version = "3.3.4"
@@ -4,7 +4,6 @@ from langgraph.channels.binop import BinaryOperatorAggregate
 from langgraph.channels.delta import DeltaChannel
 from langgraph.channels.ephemeral_value import EphemeralValue
 from langgraph.channels.last_value import LastValue, LastValueAfterFinish
-from langgraph.channels.log import Log, LogRef, MessagesLog
 from langgraph.channels.named_barrier_value import (
    NamedBarrierValue,
    NamedBarrierValueAfterFinish,
@@ -23,9 +22,6 @@ __all__ = (
    "EphemeralValue",
    "BinaryOperatorAggregate",
    "DeltaChannel",
-    "Log",
-    "LogRef",
-    "MessagesLog",
    "NamedBarrierValue",
    "NamedBarrierValueAfterFinish",
    # topics
@@ -1,5 +1,4 @@
 import collections.abc
-import warnings
 from collections.abc import Callable, Sequence
 from typing import Any, Generic

@@ -30,26 +29,6 @@ def _strip_extras(t):  # type: ignore[no-untyped-def]
    return t


-def _is_add_messages(operator: Callable) -> bool:
-    """Whether `operator` is `add_messages`, alone or with `format=`."""
-    return getattr(operator, "_is_add_messages", False) or getattr(
-        getattr(operator, "func", None), "_is_add_messages", False
-    )
-
-
-def _warn_overwrite_messages() -> None:
-    from langgraph.warnings import LangGraphDeprecatedSinceV13
-
-    warnings.warn(
-        "Replacing all messages with `Overwrite` in an `add_messages` channel "
-        "is deprecated: stored history will be append-only. Build the messages "
-        "the model sees when calling it instead, and use the `MessagesLog` "
-        "channel, which stores messages once instead of in every checkpoint.",
-        category=LangGraphDeprecatedSinceV13,
-        stacklevel=4,
-    )
-
-
 def _get_overwrite(value: Any) -> tuple[bool, Any]:
    """Inspects the given value and returns (is_overwrite, overwrite_value).

@@ -161,8 +140,6 @@ class BinaryOperatorAggregate(Generic[Value], BaseChannel[Value, Value, Value]):
                        error_code=ErrorCode.INVALID_CONCURRENT_GRAPH_UPDATE,
                    )
                    raise InvalidUpdateError(msg)
-                if _is_add_messages(self.operator):
-                    _warn_overwrite_messages()
                self.value = overwrite_value
                seen_overwrite = True
                continue
@@ -1,328 +0,0 @@
-"""Append-only log channels (transcript log prototype).
-
-!!! warning "Prototype"
-
-    The transcript log is a prototype. Its API and storage may change.
-
-A log channel is append-only and has no reducer: the only write is "append
-these entries". Its entries are not stored in checkpoints. A checkpoint's
-value for the channel is a marker (`LogStep`) for the step that produced its
-version, and the entries live in the saver's log storage, read with
-`BaseCheckpointSaver.read_log`.
-
-Two channel types share that storage:
-
- `Log` holds JSON values. Anything that isn't JSON is rejected.
- `MessagesLog` holds LangChain messages, stored as canonical JSON. Edit ops
-  (`RemoveMessage`, `Overwrite`, re-adding an existing id) are rejected; a
-  graph that needs a different model context builds it as a projection.
-
-A thread whose field held a plain list before it became a log channel (for
-example `Annotated[list, add_messages]` changed to `MessagesLog()`) keeps
-working: the stored list becomes the log's first entries, the "seed". The
-seed is committed with the first checkpoint saved after the change, and
-checkpoints from before the change still read as the list they stored.
-"""
-
-from __future__ import annotations
-
-import json
-import math
-import uuid
-from collections.abc import Sequence
-from typing import Any, NamedTuple
-
-from langgraph.checkpoint.serde.types import LogAppend, LogStep
-from typing_extensions import Self
-
-from langgraph._internal._typing import MISSING
-from langgraph.channels.base import BaseChannel
-from langgraph.channels.binop import _get_overwrite
-from langgraph.errors import EmptyChannelError, InvalidUpdateError
-
-__all__ = ("Log", "LogRef", "MessagesLog")
-
-
-class LogRef(NamedTuple):
-    """What state reads return for a log channel: the log's length at the
-    checkpoint. Read the entries with `read_log`."""
-
-    length: int
-
-
-def _check_json(value: Any, path: str = "entry") -> None:
-    if value is None or isinstance(value, (str, bool, int)):
-        return
-    if isinstance(value, float):
-        if not math.isfinite(value):
-            raise InvalidUpdateError(f"Log {path} is not JSON: {value!r}")
-        return
-    if isinstance(value, list):
-        for i, item in enumerate(value):
-            _check_json(item, f"{path}[{i}]")
-        return
-    if isinstance(value, dict):
-        for k, item in value.items():
-            if not isinstance(k, str):
-                raise InvalidUpdateError(f"Log {path} has a non-string key: {k!r}")
-            _check_json(item, f"{path}.{k}")
-        return
-    raise InvalidUpdateError(
-        f"Log {path} is not JSON: {type(value).__name__} {value!r}"
-    )
-
-
-def _dumps(value: Any) -> str:
-    return json.dumps(value, ensure_ascii=False, allow_nan=False, separators=(",", ":"))
-
-
-class Log(BaseChannel[list, list, LogStep]):
-    """An append-only log of JSON entries.
-
-    Write a list of entries to append them. Nodes read the whole log as a
-    list. State reads return a `LogRef` instead of the entries.
-    """
-
-    __slots__ = ("entries", "base", "marker", "loaded", "extra", "seed", "seeding")
-
-    def __init__(self, typ: Any = list) -> None:
-        super().__init__(typ)
-        self.entries: list[Any] = []
-        # length covered by the last committed step (the checkpoint's leaf)
-        self.base = 0
-        self.marker: LogStep | None = None
-        # False when built from a checkpoint without reading the log
-        self.loaded = True
-        # entries appended to a channel that was not loaded
-        self.extra = 0
-        # True while the entries hold a plain list stored before the field
-        # became a log channel, not committed to the log yet
-        self.seed = False
-        # True from the commit that includes the seed until the loop has
-        # stamped that checkpoint's step
-        self.seeding = False
-
-    def __eq__(self, other: object) -> bool:
-        return type(self) is type(other)
-
-    @property
-    def ValueType(self) -> Any:
-        return list
-
-    @property
-    def UpdateType(self) -> Any:
-        return list
-
-    # -- encoding ----------------------------------------------------------
-
-    def encode(self, entry: Any) -> Any:
-        """An entry as the JSON value stored for it."""
-        _check_json(entry)
-        return entry
-
-    def decode(self, data: Any) -> Any:
-        """A stored JSON value as the entry nodes see."""
-        return data
-
-    def coerce(self, value: Any) -> list[Any]:
-        """A write as the list of entries it appends."""
-        if not isinstance(value, list):
-            raise InvalidUpdateError(
-                f"Log channel {self.key!r} takes a list of entries, got "
-                f"{type(value).__name__}"
-            )
-        return value
-
-    def append_value(self, value: Any, exec_: str) -> LogAppend:
-        """A write as the `LogAppend` handed to the saver."""
-        self._reject_overwrite(value)
-        texts = tuple(_dumps(self.encode(e)) for e in self.coerce(value))
-        return LogAppend(self.base, texts, exec_)
-
-    # -- channel protocol --------------------------------------------------
-
-    def _new(self) -> Self:
-        new = self.__class__.__new__(self.__class__)
-        BaseChannel.__init__(new, self.typ, self.key)
-        new.entries = []
-        new.base = 0
-        new.marker = None
-        new.loaded = True
-        new.extra = 0
-        new.seed = False
-        new.seeding = False
-        return new
-
-    def copy(self) -> Self:
-        new = self._new()
-        new.entries = list(self.entries)
-        new.base = self.base
-        new.marker = self.marker
-        new.loaded = self.loaded
-        new.extra = self.extra
-        new.seed = self.seed
-        new.seeding = self.seeding
-        return new
-
-    def from_checkpoint(self, checkpoint: Any) -> Self:
-        """A channel that knows its marker but not its entries.
-
-        State reads build channels this way; `get` then returns a `LogRef`.
-        The loop builds log channels with `from_log` instead.
-
-        A plain list is what the field stored before it became a log channel.
-        The channel then holds it as its seed: uncommitted entries that the
-        next commit writes to the log, ahead of anything appended after.
-        """
-        new = self._new()
-        if isinstance(checkpoint, LogStep):
-            new.marker = checkpoint.stripped()
-            new.base = checkpoint.end
-            new.loaded = False
-        elif isinstance(checkpoint, list):
-            new.entries = self._seed_entries(checkpoint)
-            new.seed = bool(new.entries)
-        elif checkpoint is not MISSING and checkpoint is not None:
-            raise InvalidUpdateError(
-                f"Log channel {self.key!r} can't start from {type(checkpoint).__name__}"
-            )
-        return new
-
-    def _seed_entries(self, stored: list[Any]) -> list[Any]:
-        """The entries a stored plain list becomes."""
-        return list(stored)
-
-    def from_log(self, marker: Any, entries: Sequence[Any]) -> Self:
-        """A loaded channel: the marker, and the entries read from the log."""
-        new = self._new()
-        if isinstance(marker, LogStep):
-            if len(entries) != marker.end:
-                raise ValueError(
-                    f"Log channel {self.key!r}: read {len(entries)} entries, "
-                    f"the checkpoint has {marker.end}"
-                )
-            new.marker = marker.stripped()
-            new.base = marker.end
-        new.entries = [self.decode(e) for e in entries]
-        return new
-
-    def get(self) -> Any:
-        if not self.loaded:
-            return LogRef(self.base + self.extra)
-        if not self.entries:
-            raise EmptyChannelError()
-        return self.entries
-
-    def is_available(self) -> bool:
-        return (not self.loaded and self.base + self.extra > 0) or bool(self.entries)
-
-    def update(self, values: Sequence[Any]) -> bool:
-        if not values:
-            return False
-        appended: list[Any] = []
-        for value in values:
-            if isinstance(value, LogAppend):
-                # a write read back from the saver (pending writes on resume)
-                appended.extend(self.decode(json.loads(t)) for t in value.entries)
-                continue
-            self._reject_overwrite(value)
-            for entry in self.coerce(value):
-                self.encode(entry)  # validate before anything is applied
-                appended.append(entry)
-        if not appended:
-            return False
-        self._check_appends(appended)
-        if not self.loaded:
-            self.extra += len(appended)
-        else:
-            self.entries.extend(appended)
-        return True
-
-    def _check_appends(self, appended: list[Any]) -> None:
-        pass
-
-    def _reject_overwrite(self, value: Any) -> None:
-        if _get_overwrite(value)[0]:
-            raise InvalidUpdateError(
-                f"Log channel {self.key!r} is append-only: Overwrite is not supported"
-            )
-
-    def checkpoint(self) -> Any:
-        return MISSING if self.marker is None else self.marker
-
-    def commit(self) -> LogStep | None:
-        """The marker for a checkpoint about to be saved.
-
-        Entries appended since the last commit become a new `LogStep`
-        (carrying them inline; the loop strips them when they already reached
-        the saver through `put_writes`), and the channel's base moves to its
-        end.
-        """
-        if self.loaded and len(self.entries) > self.base:
-            texts = tuple(_dumps(self.encode(e)) for e in self.entries[self.base :])
-            step = LogStep(self.base, len(self.entries) - self.base, "", texts)
-            self.base = len(self.entries)
-            self.marker = step.stripped()
-            self.seeding, self.seed = self.seed, False
-            return step
-        return self.marker
-
-
-class MessagesLog(Log):
-    """An append-only log of LangChain messages.
-
-    Messages are stored as canonical JSON (`message_to_dict`). Every message
-    has an id; writing an id that is already in the log is an error, as are
-    `RemoveMessage` and `Overwrite`.
-    """
-
-    __slots__ = ()
-
-    def encode(self, entry: Any) -> Any:
-        from langchain_core.messages import BaseMessage, RemoveMessage, message_to_dict
-
-        if isinstance(entry, RemoveMessage):
-            raise InvalidUpdateError(
-                f"MessagesLog {self.key!r} is append-only: RemoveMessage is not "
-                "supported. To give the model a different set of messages, build "
-                "them when calling the model instead of changing stored history."
-            )
-        if not isinstance(entry, BaseMessage):
-            raise InvalidUpdateError(
-                f"MessagesLog {self.key!r} takes messages, got {type(entry).__name__}"
-            )
-        data = message_to_dict(entry)
-        _check_json(data, "message")
-        return data
-
-    def decode(self, data: Any) -> Any:
-        from langchain_core.messages import messages_from_dict
-
-        return messages_from_dict([data])[0]
-
-    def _seed_entries(self, stored: list[Any]) -> list[Any]:
-        # the list `add_messages` stored: already merged, so ids are unique
-        # and there are no `RemoveMessage`s
-        return self.coerce(stored)
-
-    def coerce(self, value: Any) -> list[Any]:
-        from langchain_core.messages import convert_to_messages
-
-        items = value if isinstance(value, list) else [value]
-        messages = convert_to_messages(items)
-        for m in messages:
-            if not m.id:
-                m.id = str(uuid.uuid4())
-        return messages
-
-    def _check_appends(self, appended: list[Any]) -> None:
-        seen = {m.id for m in self.entries} if self.loaded else set()
-        for m in appended:
-            if m.id in seen:
-                raise InvalidUpdateError(
-                    f"MessagesLog {self.key!r} already has a message with id "
-                    f"{m.id!r}: the log is append-only, so a message can't be "
-                    "replaced. Return only new messages from a node, not the "
-                    "whole list."
-                )
-            seen.add(m.id)
@@ -27,7 +27,7 @@ from langgraph.graph.state import StateGraph
 from langgraph.pregel._messages import (
    _messages_delta_reducer as _messages_delta_reducer,
 )
-from langgraph.warnings import LangGraphDeprecatedSinceV10, LangGraphDeprecatedSinceV13
+from langgraph.warnings import LangGraphDeprecatedSinceV10

 __all__ = (
    "add_messages",
@@ -41,27 +41,7 @@ Messages = list[MessageLikeRepresentation] | MessageLikeRepresentation
 REMOVE_ALL_MESSAGES = "__remove_all__"


-_EDIT_DEPRECATION = (
-    "{what} through `add_messages` is deprecated: stored history will be "
-    "append-only. Build the messages the model sees when calling it instead "
-    "(for example from a summary kept in state), and use the `MessagesLog` "
-    "channel, which stores messages once instead of in every checkpoint."
-)
-
-
-def _warn_edit(what: str) -> None:
-    warnings.warn(
-        _EDIT_DEPRECATION.format(what=what),
-        category=LangGraphDeprecatedSinceV13,
-        stacklevel=3,
-    )
-
-
 def _add_messages_wrapper(func: Callable) -> Callable[[Messages, Messages], Messages]:
-    # lets `BinaryOperatorAggregate` recognize the reducer, alone or with
-    # `format=`, without importing this module
-    func._is_add_messages = True  # type: ignore[attr-defined]
-
    def _add_messages(
        left: Messages | None = None, right: Messages | None = None, **kwargs: Any
    ) -> Messages | Callable[[Messages, Messages], Messages]:
@@ -77,7 +57,6 @@ def _add_messages_wrapper(func: Callable) -> Callable[[Messages, Messages], Mess
            return partial(func, **kwargs)

    _add_messages.__doc__ = func.__doc__
-    _add_messages._is_add_messages = True  # type: ignore[attr-defined]
    return cast(Callable[[Messages, Messages], Messages], _add_messages)


@@ -234,11 +213,9 @@ def add_messages(
            remove_all_idx = idx

    if remove_all_idx is not None:
-        _warn_edit("Removing all messages with `REMOVE_ALL_MESSAGES`")
        return right[remove_all_idx + 1 :]

    # merge
-    left_ids = {m.id for m in left}
    merged = left.copy()
    merged_by_id = {m.id: i for i, m in enumerate(merged)}
    ids_to_remove = set()
@@ -258,10 +235,6 @@ def add_messages(
            merged_by_id[m.id] = len(merged)
            merged.append(m)
    merged = [m for m in merged if m.id not in ids_to_remove]
-    if any(isinstance(m, RemoveMessage) for m in right):
-        _warn_edit("Removing messages with `RemoveMessage`")
-    elif any(m.id in left_ids for m in right):
-        _warn_edit("Replacing a message by id")

    if format == "langchain-openai":
        merged = _format_messages(merged)
@@ -4,7 +4,7 @@ import uuid
 from collections.abc import Callable, Iterable, Mapping, Sequence
 from datetime import datetime, timezone
 from inspect import signature
-from typing import Any, Literal, cast
+from typing import Any, Literal

 from langchain_core.runnables import RunnableConfig
 from langgraph.checkpoint.base import (
@@ -16,7 +16,7 @@ from langgraph.checkpoint.base import (
    PendingWrite,
 )
 from langgraph.checkpoint.base.id import uuid6
-from langgraph.checkpoint.serde.types import LogStep, _DeltaSnapshot
+from langgraph.checkpoint.serde.types import _DeltaSnapshot

 from langgraph._internal._config import (
    DELTA_MAX_SUPERSTEPS_SINCE_SNAPSHOT,
@@ -35,7 +35,6 @@ from langgraph._internal._typing import MISSING
 from langgraph.channels.base import BaseChannel
 from langgraph.channels.binop import BinaryOperatorAggregate, _get_overwrite
 from langgraph.channels.delta import DeltaChannel
-from langgraph.channels.log import Log
 from langgraph.managed.base import ManagedValueMapping, ManagedValueSpec

 LATEST_VERSION = 4
@@ -326,10 +325,6 @@ def create_checkpoint(
                    bumped[k] = (old, channel_versions[k])
                values[k] = _DeltaSnapshot(ch.get())
            else:
-                if isinstance(ch, Log):
-                    if (log_step := ch.commit()) is not None:
-                        values[k] = log_step
-                    continue
                v = ch.checkpoint()
                if v is not MISSING:
                    values[k] = v
@@ -460,39 +455,12 @@ def _require_saver_for_history(
        )


-def _log_specs(
-    specs: Mapping[str, BaseChannel], checkpoint: Checkpoint, load_logs: bool
-) -> list[str]:
-    """Log channels whose entries must be read from the saver."""
-    if not load_logs:
-        return []
-    return [
-        k
-        for k, spec in specs.items()
-        if isinstance(spec, Log)
-        and isinstance(checkpoint["channel_values"].get(k), LogStep)
-    ]
-
-
-def _require_saver_for_log(
-    log_channels: list[str],
-    saver: BaseCheckpointSaver | None,
-    config: RunnableConfig | None,
-) -> None:
-    if log_channels and (saver is None or config is None):
-        raise ValueError(
-            f"Log channels {log_channels} have entries to read but no "
-            "checkpointer or config was passed to read them"
-        )
-
-
 def channels_from_checkpoint(
    specs: Mapping[str, BaseChannel | ManagedValueSpec],
    checkpoint: Checkpoint,
    *,
    saver: BaseCheckpointSaver | None = None,
    config: RunnableConfig | None = None,
-    load_logs: bool = True,
 ) -> tuple[Mapping[str, BaseChannel], ManagedValueMapping]:
    """Hydrate channels from a checkpoint.

@@ -519,20 +487,12 @@ def channels_from_checkpoint(
        histories = saver.get_delta_channel_history(
            config=config, channels=delta_channels
        )
-    log_channels = _log_specs(channel_specs, checkpoint, load_logs)
-    _require_saver_for_log(log_channels, saver, config)
-    logs: dict[str, list[Any]] = {}
-    if log_channels and saver is not None and config is not None:
-        for k in log_channels:
-            logs[k] = [e for _, e in saver.read_log(config, k).entries]

    channels: dict[str, BaseChannel] = {}
    for k, spec in channel_specs.items():
        ch: BaseChannel
        if k in histories:
            ch = _replay(spec, histories[k])
-        elif k in logs:
-            ch = cast(Log, spec).from_log(checkpoint["channel_values"][k], logs[k])
        else:
            ch = spec.from_checkpoint(checkpoint["channel_values"].get(k, MISSING))
        channels[k] = ch
@@ -545,7 +505,6 @@ async def achannels_from_checkpoint(
    *,
    saver: BaseCheckpointSaver | None = None,
    config: RunnableConfig | None = None,
-    load_logs: bool = True,
 ) -> tuple[Mapping[str, BaseChannel], ManagedValueMapping]:
    """Async version of `channels_from_checkpoint`. See docstring there."""
    channel_specs: dict[str, BaseChannel] = {}
@@ -563,20 +522,12 @@ async def achannels_from_checkpoint(
        histories = await saver.aget_delta_channel_history(
            config=config, channels=delta_channels
        )
-    log_channels = _log_specs(channel_specs, checkpoint, load_logs)
-    _require_saver_for_log(log_channels, saver, config)
-    logs: dict[str, list[Any]] = {}
-    if log_channels and saver is not None and config is not None:
-        for k in log_channels:
-            logs[k] = [e for _, e in (await saver.aread_log(config, k)).entries]

    channels: dict[str, BaseChannel] = {}
    for k, spec in channel_specs.items():
        ch: BaseChannel
        if k in histories:
            ch = _replay(spec, histories[k])
-        elif k in logs:
-            ch = cast(Log, spec).from_log(checkpoint["channel_values"][k], logs[k])
        else:
            ch = spec.from_checkpoint(checkpoint["channel_values"].get(k, MISSING))
        channels[k] = ch
@@ -3,7 +3,6 @@ from __future__ import annotations
 import asyncio
 import binascii
 import concurrent.futures
-import json
 from collections import defaultdict, deque
 from collections.abc import Callable, Iterator, Mapping, Sequence
 from contextlib import (
@@ -13,7 +12,6 @@ from contextlib import (
    ExitStack,
 )
 from datetime import datetime, timezone
-from functools import partial
 from types import TracebackType
 from typing import (
    Any,
@@ -21,7 +19,7 @@ from typing import (
    TypeVar,
    cast,
 )
-from uuid import UUID, uuid4, uuid5
+from uuid import UUID, uuid5

 from langchain_core.callbacks import AsyncParentRunManager, ParentRunManager
 from langchain_core.runnables import RunnableConfig
@@ -35,7 +33,6 @@ from langgraph.checkpoint.base import (
    CheckpointTuple,
    PendingWrite,
 )
-from langgraph.checkpoint.serde.types import LogAppend, LogStep
 from langgraph.store.base import BaseStore
 from typing_extensions import ParamSpec, Self

@@ -75,7 +72,6 @@ from langgraph.callbacks import (
 from langgraph.channels.base import BaseChannel
 from langgraph.channels.binop import _get_overwrite
 from langgraph.channels.delta import DeltaChannel
-from langgraph.channels.log import Log
 from langgraph.channels.untracked_value import UntrackedValue
 from langgraph.constants import TAG_HIDDEN
 from langgraph.errors import (
@@ -136,7 +132,7 @@ from langgraph.pregel.debug import (
    map_debug_tasks,
 )
 from langgraph.pregel.protocol import StreamChunk, StreamProtocol
-from langgraph.runtime import RunControl, Runtime
+from langgraph.runtime import RunControl, Runtime, _RunExits
 from langgraph.types import (
    All,
    CachePolicy,
@@ -360,9 +356,6 @@ class PregelLoop:
        self.retry_policy = retry_policy
        self.cache_policy = cache_policy
        self.durability = durability
-        # identifies this execution's log writes (transcript log prototype)
-        self._log_exec = str(uuid4())
-        self._log_inline_first_step = False
        self._has_graph_lifecycle_callbacks = has_graph_lifecycle_callbacks
        self._graph_lifecycle_events = deque()
        if self.stream is not None and CONFIG_KEY_STREAM in config[CONF]:
@@ -520,7 +513,6 @@ class PregelLoop:
        # save writes
        self.checkpoint_pending_writes.extend((task_id, c, v) for c, v in writes)
        if self.durability != "exit" and self.checkpointer_put_writes is not None:
-            writes_to_save = self._log_writes_for_saver(writes_to_save)
            config = patch_configurable(
                self.checkpoint_config,
                {
@@ -530,21 +522,13 @@ class PregelLoop:
                    CONFIG_KEY_CHECKPOINT_ID: self.checkpoint["id"],
                },
            )
-            # A log write is placed relative to the log of the checkpoint it is
-            # stored on, so that checkpoint must be saved first.
-            put_writes_fn = self.checkpointer_put_writes
-            if any(isinstance(self.specs.get(c), Log) for c, _ in writes_to_save):
-                put_writes_fn = partial(
-                    self._put_writes_after_checkpoint,
-                    getattr(self, "_put_checkpoint_fut", None),
-                )
            if self.checkpointer_put_writes_accepts_task_path:
                if hasattr(self, "tasks"):
                    task = self.tasks.get(task_id)
                else:
                    task = None
                fut = self.submit(
-                    put_writes_fn,
+                    self.checkpointer_put_writes,
                    config,
                    writes_to_save,
                    task_id,
@@ -552,16 +536,13 @@ class PregelLoop:
                )
            else:
                fut = self.submit(
-                    put_writes_fn,
+                    self.checkpointer_put_writes,
                    config,
                    writes_to_save,
                    task_id,
                )
-            # the checkpoint that commits these writes must not be saved before
-            # them: a delta replay or a log step reads them
            if self._delta_write_futs is not None and any(
-                isinstance(self.specs.get(c), (DeltaChannel, Log))
-                for c, _ in writes_to_save
+                isinstance(self.specs.get(c), DeltaChannel) for c, _ in writes_to_save
            ):
                self._delta_write_futs.append(fut)
            # ERROR_SOURCE_NODE is only appended by commit() when the task
@@ -575,24 +556,6 @@ class PregelLoop:
        if hasattr(self, "tasks"):
            self.output_writes(task_id, writes, cached=cached)

-    def _log_write_from_saver(self, channel: str, value: Any) -> Any:
-        """A saved `LogAppend` as the write it was: a list of entries."""
-        spec = self.specs.get(channel)
-        if isinstance(value, LogAppend) and isinstance(spec, Log):
-            return [spec.decode(json.loads(t)) for t in value.entries]
-        return value
-
-    def _log_writes_for_saver(self, writes: WritesT) -> WritesT:
-        """Writes to log channels as the `LogAppend`s handed to the saver."""
-        if not any(isinstance(self.channels.get(c), Log) for c, _ in writes):
-            return writes
-        return [
-            (c, ch.append_value(v, self._log_exec))
-            if isinstance(ch := self.channels.get(c), Log)
-            else (c, v)
-            for c, v in writes
-        ]
-
    def _put_pending_writes(self) -> None:
        if self.checkpointer_put_writes is None:
            return
@@ -616,7 +579,6 @@ class PregelLoop:
                by_task[task_id].append((channel, value))
        # submit writes to checkpointer
        for task_id, writes in by_task.items():
-            writes = self._log_writes_for_saver(writes)
            if self.checkpointer_put_writes_accepts_task_path and hasattr(
                self, "tasks"
            ):
@@ -1349,8 +1311,6 @@ class PregelLoop:
            stored_versions=self.checkpoint_previous_versions,
            trigger_to_nodes=self.trigger_to_nodes,
        )
-        if do_checkpoint:
-            self._finish_log_steps(metadata)
        for k in channels_to_snapshot:
            new_counters[k] = (0, 0)
        if do_checkpoint:
@@ -1423,51 +1383,6 @@ class PregelLoop:
            # increment step
            self.step += 1

-    def _finish_log_steps(self, metadata: CheckpointMetadata) -> None:
-        """Stamp the log steps of the checkpoint about to be saved.
-
-        A step's entries reached the saver through `put_writes` when the
-        checkpoint comes from the loop and writes are saved as they happen;
-        then the step carries no entries. Otherwise (graph input, a fork,
-        `durability="exit"`) it carries them inline.
-
-        A resume at a checkpoint the thread moved past re-runs finished tasks
-        on that same checkpoint, and a saver without native log support keeps
-        the first run's writes under the same keys. So the first step of such
-        a resume carries its entries inline too.
-
-        So does a step that commits a seed (the list a field stored before it
-        became a log channel), which never went through `put_writes`. The
-        channel's version is bumped if the step didn't change it, so that the
-        saver stores the step and the checkpoint points at the log.
-        """
-        inline = (
-            metadata.get("source") != "loop"
-            or self.durability == "exit"
-            or self._log_inline_first_step
-        )
-        if metadata.get("source") == "loop":
-            self._log_inline_first_step = False
-        values = self.checkpoint["channel_values"]
-        for k, ch in self.channels.items():
-            if not isinstance(ch, Log):
-                continue
-            step = values.get(k)
-            seeding, ch.seeding = ch.seeding, False
-            if seeding:
-                versions = self.checkpoint["channel_versions"]
-                if versions.get(k) == self.checkpoint_previous_versions.get(k):
-                    versions[k] = self.checkpointer_get_next_version(
-                        versions.get(k), None
-                    )
-            if isinstance(step, LogStep) and step.entries is not None:
-                values[k] = LogStep(
-                    step.start,
-                    step.count,
-                    self._log_exec,
-                    step.entries if inline or seeding else None,
-                )
-
    def _put_exit_delta_writes(self) -> None:
        """Stage stub + accumulated delta writes so final_checkpoint's put
        waits on them (visibility invariant: both must be durable before
@@ -1582,6 +1497,10 @@ class PregelLoop:
            if self._delta_write_futs is not None:
                self._delta_write_futs.append(fut)

+    def _run_exits(self) -> _RunExits | None:
+        runtime = self.config[CONF].get(CONFIG_KEY_RUNTIME)
+        return runtime._run_exits if isinstance(runtime, Runtime) else None
+
    def _suppress_interrupt(
        self,
        exc_type: type[BaseException] | None,
@@ -1794,13 +1713,6 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
            self.checkpointer_put_writes = None
            self.checkpointer_put_writes_accepts_task_path = False

-    def _put_writes_after_checkpoint(
-        self, prev: concurrent.futures.Future | None, *args: Any
-    ) -> None:
-        if prev is not None:
-            prev.result()
-        cast(Callable[..., None], self.checkpointer_put_writes)(*args)
-
    def _checkpointer_put_after_previous(
        self,
        prev: concurrent.futures.Future | None,
@@ -1913,10 +1825,6 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
                self._addressed_checkpoint_superseded = checkpoint_superseded(
                    self.checkpointer, self.checkpoint_config, saved
                )
-                self._log_inline_first_step = (
-                    self._addressed_checkpoint_superseded
-                    and not self.checkpointer.supports_log
-                )
        elif replay_state := self.config[CONF].get(CONFIG_KEY_REPLAY_STATE):
            # Subgraph replay: the parent is replaying and passed us a
            # replay_state with its checkpoint_id. Look up our checkpoint
@@ -1961,10 +1869,7 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
        self.checkpoint = saved.checkpoint
        self.checkpoint_metadata = saved.metadata
        self.checkpoint_pending_writes = (
-            [
-                (str(tid), k, self._log_write_from_saver(k, v))
-                for tid, k, v in saved.pending_writes
-            ]
+            [(str(tid), k, v) for tid, k, v in saved.pending_writes]
            if saved.pending_writes is not None
            else []
        )
@@ -1973,6 +1878,10 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
        self._exit_delta_writes = (
            [] if self.durability == "exit" and self.checkpointer is not None else None
        )
+        # Bottom of the stack, so run-exit callbacks run last: after the
+        # executor has stopped every task and the final checkpoint is saved.
+        if (exits := self._run_exits()) is not None and exits.bind(is_async=False):
+            self.stack.push(exits.exit)
        self.submit = self.stack.enter_context(BackgroundExecutor(self.config))
        self.channels, self.managed = channels_from_checkpoint(
            self.specs,
@@ -2064,13 +1973,6 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
            self.checkpointer_put_writes = None
            self.checkpointer_put_writes_accepts_task_path = False

-    async def _put_writes_after_checkpoint(
-        self, prev: asyncio.Task | None, *args: Any
-    ) -> None:
-        if prev is not None:
-            await prev
-        await cast(Callable[..., Any], self.checkpointer_put_writes)(*args)
-
    async def _checkpointer_put_after_previous(
        self,
        prev: asyncio.Task | None,
@@ -2183,10 +2085,6 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
                self._addressed_checkpoint_superseded = await acheckpoint_superseded(
                    self.checkpointer, self.checkpoint_config, saved
                )
-                self._log_inline_first_step = (
-                    self._addressed_checkpoint_superseded
-                    and not self.checkpointer.supports_log
-                )
        elif replay_state := self.config[CONF].get(CONFIG_KEY_REPLAY_STATE):
            # Subgraph replay: the parent is replaying and passed us a
            # replay_state with its checkpoint_id. Look up our checkpoint
@@ -2231,10 +2129,7 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
        self.checkpoint = saved.checkpoint
        self.checkpoint_metadata = saved.metadata
        self.checkpoint_pending_writes = (
-            [
-                (str(tid), k, self._log_write_from_saver(k, v))
-                for tid, k, v in saved.pending_writes
-            ]
+            [(str(tid), k, v) for tid, k, v in saved.pending_writes]
            if saved.pending_writes is not None
            else []
        )
@@ -2243,6 +2138,10 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
        self._exit_delta_writes = (
            [] if self.durability == "exit" and self.checkpointer is not None else None
        )
+        # Bottom of the stack, so run-exit callbacks run last: after the
+        # executor has stopped every task and the final checkpoint is saved.
+        if (exits := self._run_exits()) is not None and exits.bind(is_async=True):
+            self.stack.push_async_exit(exits.aexit)
        self.submit = await self.stack.enter_async_context(
            AsyncBackgroundExecutor(self.config)
        )
@@ -26,7 +26,6 @@ from langgraph._internal._config import filter_to_user_tags
 from langgraph._internal._constants import NS_SEP, PUSH
 from langgraph.channels.binop import _get_overwrite
 from langgraph.channels.delta import DeltaChannel
-from langgraph.channels.log import MessagesLog
 from langgraph.constants import TAG_HIDDEN, TAG_NOSTREAM
 from langgraph.pregel.protocol import StreamChunk
 from langgraph.types import Command, Overwrite
@@ -538,13 +537,6 @@ def ensure_message_ids(
    """
    for i, (ch, value) in enumerate(writes):
        spec = channels.get(ch)
-        if isinstance(spec, MessagesLog):
-            # ids must be set before the write is saved, so the saved
-            # entries and the run's in-memory messages agree
-            new_value = _with_message_ids(value)
-            if new_value is not value:
-                cast(MutableSequence[tuple[str, Any]], writes)[i] = (ch, new_value)
-            continue
        if not isinstance(spec, DeltaChannel):
            continue
        if spec.reducer is _messages_delta_reducer:
@@ -49,8 +49,6 @@ from langgraph.checkpoint.base import (
    ChannelVersions,
    Checkpoint,
    CheckpointTuple,
-    LogPage,
-    log_range,
 )
 from langgraph.store.base import BaseStore
 from pydantic import BaseModel, TypeAdapter
@@ -112,7 +110,6 @@ from langgraph.callbacks import (
 )
 from langgraph.channels.base import BaseChannel
 from langgraph.channels.delta import DeltaChannel
-from langgraph.channels.log import Log
 from langgraph.channels.topic import Topic
 from langgraph.config import get_config
 from langgraph.constants import END
@@ -178,6 +175,7 @@ from langgraph.runtime import (
    RunControl,
    Runtime,
    ServerInfo,
+    _RunExits,
 )
 from langgraph.stream._mux import StreamMux
 from langgraph.stream._types import StreamTransformer
@@ -1248,7 +1246,6 @@ class Pregel(
            saved.checkpoint,
            saver=saver,
            config=saved.config,
-            load_logs=False,
        )
        # tasks for this checkpoint
        next_tasks = prepare_next_tasks(
@@ -1374,7 +1371,6 @@ class Pregel(
            saved.checkpoint,
            saver=saver,
            config=saved.config,
-            load_logs=False,
        )
        # tasks for this checkpoint
        next_tasks = prepare_next_tasks(
@@ -1487,97 +1483,6 @@ class Pregel(
            live=CONFIG_KEY_CHECKPOINT_ID not in config[CONF],
        )

-    def read_log(
-        self,
-        config: RunnableConfig,
-        channel: str,
-        *,
-        after: int | None = None,
-        before: int | None = None,
-        limit: int | None = None,
-    ) -> LogPage:
-        """Read a log channel as of a checkpoint (prototype).
-
-        The same operation as `BaseCheckpointSaver.read_log`, with entries
-        decoded by the channel (messages for a `MessagesLog`).
-        """
-        checkpointer = self._state_checkpointer(config)
-        if subgraph := self._subgraph_for_namespace(config, checkpointer):
-            pregel, subgraph_config = subgraph
-            return pregel.read_log(  # type: ignore[attr-defined]
-                subgraph_config, channel, after=after, before=before, limit=limit
-            )
-        config = merge_configs(self.config, config) if self.config else config
-        config = self._own_checkpoint_config(config)
-        page = checkpointer.read_log(
-            config, channel, after=after, before=before, limit=limit
-        )
-        if page.length == 0 and (tup := checkpointer.get_tuple(config)) is not None:
-            if (
-                pre := self._pre_log_page(channel, tup, after, before, limit)
-            ) is not None:
-                return pre
-        return self._decode_log_page(channel, page)
-
-    async def aread_log(
-        self,
-        config: RunnableConfig,
-        channel: str,
-        *,
-        after: int | None = None,
-        before: int | None = None,
-        limit: int | None = None,
-    ) -> LogPage:
-        """Async version of `read_log`."""
-        checkpointer = self._state_checkpointer(config)
-        if subgraph := self._subgraph_for_namespace(config, checkpointer):
-            pregel, subgraph_config = subgraph
-            return await pregel.aread_log(  # type: ignore[attr-defined]
-                subgraph_config, channel, after=after, before=before, limit=limit
-            )
-        config = merge_configs(self.config, config) if self.config else config
-        config = self._own_checkpoint_config(config)
-        page = await checkpointer.aread_log(
-            config, channel, after=after, before=before, limit=limit
-        )
-        if (
-            page.length == 0
-            and (tup := await checkpointer.aget_tuple(config)) is not None
-        ):
-            if (
-                pre := self._pre_log_page(channel, tup, after, before, limit)
-            ) is not None:
-                return pre
-        return self._decode_log_page(channel, page)
-
-    def _pre_log_page(
-        self,
-        channel: str,
-        tup: CheckpointTuple,
-        after: int | None,
-        before: int | None,
-        limit: int | None,
-    ) -> LogPage | None:
-        """A page of the list a checkpoint stored before the field became a
-        log channel, or `None` if it stored none."""
-        spec = self.channels.get(channel)
-        stored = tup.checkpoint["channel_values"].get(channel)
-        if not isinstance(spec, Log) or not isinstance(stored, list):
-            return None
-        entries = spec.from_checkpoint(stored).entries
-        lo, hi = log_range(len(entries), after, before, limit)
-        return LogPage([(i, entries[i]) for i in range(lo, hi)], len(entries), [])
-
-    def _decode_log_page(self, channel: str, page: LogPage) -> LogPage:
-        spec = self.channels.get(channel)
-        if not isinstance(spec, Log):
-            raise ValueError(f"Channel {channel!r} is not a log channel")
-        return LogPage(
-            [(pos, spec.decode(e)) for pos, e in page.entries],
-            page.length,
-            [spec.decode(e) for e in page.pending],
-        )
-
    async def aget_state(
        self, config: RunnableConfig, *, subgraphs: bool = False
    ) -> StateSnapshot:
@@ -3062,6 +2967,8 @@ class Pregel(
                execution_info=None,
                server_info=server_info,
                control=control or parent_runtime.control or RunControl(),
+                # a subgraph shares the root run's exit callbacks
+                _run_exits=parent_runtime._run_exits or _RunExits(),
            )
            runtime = parent_runtime.merge(runtime)
            config[CONF][CONFIG_KEY_RUNTIME] = runtime
@@ -3500,6 +3407,8 @@ class Pregel(
                execution_info=None,
                server_info=server_info,
                control=control or parent_runtime.control or RunControl(),
+                # a subgraph shares the root run's exit callbacks
+                _run_exits=parent_runtime._run_exits or _RunExits(),
            )
            runtime = parent_runtime.merge(runtime)
            config[CONF][CONFIG_KEY_RUNTIME] = runtime
@@ -1,7 +1,11 @@
 from __future__ import annotations

-from collections.abc import Callable
+import inspect
+import logging
+import threading
+from collections.abc import Awaitable, Callable
 from dataclasses import dataclass, field, replace
+from types import TracebackType
 from typing import Any, Generic, cast

 from langgraph.store.base import BaseStore
@@ -104,6 +108,129 @@ class RunControl:
        return self._drain_reason


+logger = logging.getLogger(__name__)
+
+ExitCallback = Callable[[], Awaitable[None] | None]
+"""A cleanup callback registered with `Runtime.on_exit`."""
+
+
+class _RunExits:
+    """Cleanup callbacks for one root graph invocation.
+
+    Created by the root `stream`/`astream` call and shared by every subgraph
+    it runs, through `Runtime`. The root Pregel loop binds it at the bottom of
+    its exit stack, so callbacks run after the loop has stopped every task,
+    persisted its final checkpoint and handled any interrupt, whatever the
+    reason the run ended.
+    """
+
+    __slots__ = ("_callbacks", "_is_async", "_lock", "_state")
+
+    def __init__(self) -> None:
+        self._callbacks: list[ExitCallback] = []
+        self._lock = threading.Lock()
+        self._is_async = False
+        # "new" -> "bound" (owned by a loop) -> "closed" (callbacks ran)
+        self._state = "new"
+
+    def bind(self, *, is_async: bool) -> bool:
+        """Claim these exits for a loop. Only the first (root) loop wins."""
+        with self._lock:
+            if self._state != "new":
+                return False
+            self._state = "bound"
+            self._is_async = is_async
+            return True
+
+    def register(self, callback: ExitCallback) -> None:
+        if not callable(callback):
+            msg = "on_exit() expects a callable"
+            raise TypeError(msg)
+        with self._lock:
+            if self._state == "closed":
+                msg = "on_exit() called after the graph run has already exited"
+                raise RuntimeError(msg)
+            if not self._is_async and _is_async_callable(callback):
+                msg = (
+                    "on_exit() got an async callback in a synchronous graph run "
+                    "(invoke/stream). Register a sync callback, or run the graph "
+                    "with ainvoke/astream."
+                )
+                raise TypeError(msg)
+            self._callbacks.append(callback)
+
+    def _drain(self) -> list[ExitCallback]:
+        with self._lock:
+            self._state = "closed"
+            callbacks = self._callbacks[::-1]  # LIFO
+            self._callbacks = []
+        return callbacks
+
+    def exit(
+        self,
+        exc_type: type[BaseException] | None,
+        exc_value: BaseException | None,
+        traceback: TracebackType | None,
+    ) -> bool:
+        errors: list[Exception] = []
+        for callback in self._drain():
+            try:
+                result = callback()
+                if inspect.isawaitable(result):
+                    if inspect.iscoroutine(result):
+                        result.close()
+                    msg = (
+                        f"on_exit() callback {callback!r} returned an awaitable "
+                        "in a synchronous graph run; it was not awaited."
+                    )
+                    raise TypeError(msg)
+            except Exception as e:
+                errors.append(e)
+        return self._finish(errors, exc_value)
+
+    async def aexit(
+        self,
+        exc_type: type[BaseException] | None,
+        exc_value: BaseException | None,
+        traceback: TracebackType | None,
+    ) -> bool:
+        errors: list[Exception] = []
+        for callback in self._drain():
+            try:
+                result = callback()
+                if inspect.isawaitable(result):
+                    await result
+            except Exception as e:
+                errors.append(e)
+        return self._finish(errors, exc_value)
+
+    @staticmethod
+    def _finish(errors: list[Exception], exc_value: BaseException | None) -> bool:
+        # Every callback runs even if an earlier one failed. A failing callback
+        # never replaces the run's own exception (error, cancellation, stream
+        # close): it is logged instead. If the run otherwise ended cleanly, the
+        # first callback error is raised so cleanup bugs aren't silent.
+        if not errors:
+            return False
+        if exc_value is None:
+            for e in errors[1:]:
+                logger.error("on_exit() callback failed", exc_info=e)
+            raise errors[0]
+        for e in errors:
+            logger.error(
+                "on_exit() callback failed while the graph run was exiting with %r",
+                exc_value,
+                exc_info=e,
+            )
+        return False
+
+
+def _is_async_callable(callback: Any) -> bool:
+    return inspect.iscoroutinefunction(callback) or inspect.iscoroutinefunction(
+        getattr(callback, "__call__", None)
+    )
+
+
 def _no_op_stream_writer(_: Any) -> None: ...


@@ -237,6 +364,40 @@ class Runtime(Generic[ContextT]):
    graph runtime.
    """

+    _run_exits: _RunExits | None = field(default=None, repr=False, compare=False)
+    """Exit callbacks of the root graph run. Use `on_exit` to register one."""
+
+    def on_exit(self, callback: ExitCallback) -> None:
+        """Register cleanup to run when the current graph run ends.
+
+        The callback runs once the root invocation (the `invoke`/`stream`/
+        `ainvoke`/`astream` call the caller made) exits for any reason: it
+        completed, raised, was cancelled, paused on an interrupt, or the caller
+        closed the stream or broke out of it. Calls from subgraphs register on
+        that same root run.
+
+        Callbacks take no arguments and run in reverse registration order,
+        after every task of the run has stopped and the final checkpoint has
+        been written. In `ainvoke`/`astream` a callback may be sync or async; in
+        `invoke`/`stream` it must be sync. A failing callback never hides the
+        run's own exception: it is logged, and raised only if the run otherwise
+        ended without one.
+
+        A process that is killed does not run its callbacks, so use them to
+        free resources early, not as the only guarantee they are freed.
+
+        Args:
+            callback: A zero-argument sync or async callable.
+
+        Raises:
+            RuntimeError: When called outside a graph run, or after it exited.
+            TypeError: When given an async callback in a synchronous run.
+        """
+        if self._run_exits is None:
+            msg = "on_exit() can only be called during a graph run"
+            raise RuntimeError(msg)
+        self._run_exits.register(callback)
+
    def merge(self, other: Runtime[ContextT]) -> Runtime[ContextT]:
        """Merge two runtimes together.

@@ -255,6 +416,7 @@ class Runtime(Generic[ContextT]):
            execution_info=other.execution_info or self.execution_info,
            server_info=other.server_info or self.server_info,
            control=other.control or self.control,
+            _run_exits=other._run_exits or self._run_exits,
        )

    def override(
@@ -7,7 +7,6 @@ __all__ = (
    "LangGraphDeprecatedSinceV05",
    "LangGraphDeprecatedSinceV10",
    "LangGraphDeprecatedSinceV11",
-    "LangGraphDeprecatedSinceV13",
 )


@@ -68,10 +67,3 @@ class LangGraphDeprecatedSinceV11(LangGraphDeprecationWarning):

    def __init__(self, message: str, *args: object) -> None:
        super().__init__(message, *args, since=(1, 1), expected_removal=(3, 0))
-
-
-class LangGraphDeprecatedSinceV13(LangGraphDeprecationWarning):
-    """A specific `LangGraphDeprecationWarning` subclass defining functionality deprecated since LangGraph v1.3.0"""
-
-    def __init__(self, message: str, *args: object) -> None:
-        super().__init__(message, *args, since=(1, 3), expected_removal=(2, 0))
@@ -1,718 +0,0 @@
-"""Transcript log prototype: append-only `Log` / `MessagesLog` channels.
-
-Every scenario runs against `InMemorySaver` (native log storage: segments,
-step rows, range reads) and `SqliteSaver` (no native support: the default
-`read_log` walks the parent chain), and both must read the same log.
-"""
-
-import operator
-import sqlite3
-import warnings
-from collections.abc import Iterator
-from typing import Annotated, Any
-
-import pytest
-from langchain_core.messages import AIMessage, HumanMessage, RemoveMessage
-from langchain_core.tools import tool
-from langgraph.checkpoint.base import BaseCheckpointSaver, LogPage
-from langgraph.checkpoint.memory import InMemorySaver
-from langgraph.checkpoint.sqlite import SqliteSaver
-from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
-from langgraph.prebuilt import ToolNode, tools_condition
-from typing_extensions import TypedDict
-
-from langgraph.channels import Log, LogRef, MessagesLog
-from langgraph.errors import InvalidUpdateError
-from langgraph.graph import END, START, StateGraph
-from langgraph.graph.message import REMOVE_ALL_MESSAGES, add_messages
-from langgraph.types import Command, Overwrite, Send, interrupt
-from langgraph.warnings import LangGraphDeprecatedSinceV13
-
-pytestmark = pytest.mark.anyio
-
-
-@pytest.fixture(params=["memory", "sqlite"])
-def saver(request: pytest.FixtureRequest) -> Iterator[BaseCheckpointSaver]:
-    if request.param == "memory":
-        yield InMemorySaver()
-    else:
-        conn = sqlite3.connect(":memory:", check_same_thread=False)
-        yield SqliteSaver(conn)
-        conn.close()
-
-
-def contents(page: LogPage) -> list[Any]:
-    return [e.content if hasattr(e, "content") else e for _, e in page.entries]
-
-
-class ChatState(TypedDict):
-    messages: Annotated[list, MessagesLog()]
-
-
-def chat_graph(saver: BaseCheckpointSaver, **compile_kw: Any):
-    def model(state: ChatState) -> dict:
-        return {"messages": [AIMessage(f"reply to {state['messages'][-1].content}")]}
-
-    builder = StateGraph(ChatState)
-    builder.add_node("model", model)
-    builder.add_edge(START, "model")
-    builder.add_edge("model", END)
-    return builder.compile(checkpointer=saver, **compile_kw)
-
-
-def test_appends_reads_and_state_marker(saver: BaseCheckpointSaver) -> None:
-    graph = chat_graph(saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke({"messages": [HumanMessage("a")]}, config)
-    out = graph.invoke({"messages": [HumanMessage("b")]}, config)
-
-    # nodes and invoke() see the list
-    assert [m.content for m in out["messages"]] == [
-        "a",
-        "reply to a",
-        "b",
-        "reply to b",
-    ]
-    # state reads return the marker, not the transcript
-    assert graph.get_state(config).values == {"messages": LogRef(4)}
-    # one read operation, same arguments everywhere
-    page = graph.read_log(config, "messages")
-    assert page.length == 4
-    assert contents(page) == ["a", "reply to a", "b", "reply to b"]
-    assert [p for p, _ in page.entries] == [0, 1, 2, 3]
-    assert contents(graph.read_log(config, "messages", limit=2)) == ["b", "reply to b"]
-    assert contents(graph.read_log(config, "messages", before=2, limit=1)) == [
-        "reply to a"
-    ]
-    assert contents(graph.read_log(config, "messages", after=1, limit=1)) == ["b"]
-    # the saver-level read returns JSON
-    raw = saver.read_log(config, "messages")
-    assert raw.entries[0][1]["type"] == "human"
-    # every checkpoint points at its own leaf
-    lengths = [
-        (s.metadata["source"], graph.read_log(s.config, "messages").length)
-        for s in graph.get_state_history(config)
-    ]
-    assert lengths == [
-        ("loop", 4),
-        ("loop", 3),
-        ("input", 2),
-        ("loop", 2),
-        ("loop", 1),
-        ("input", 0),
-    ]
-
-
-async def test_async_appends_and_reads() -> None:
-    async with AsyncSqliteSaver.from_conn_string(":memory:") as fallback:
-        for saver in (InMemorySaver(), fallback):
-            graph = chat_graph(saver)
-            config = {"configurable": {"thread_id": "1"}}
-            await graph.ainvoke({"messages": [HumanMessage("a")]}, config)
-            await graph.ainvoke({"messages": [HumanMessage("b")]}, config)
-            state = await graph.aget_state(config)
-            assert state.values == {"messages": LogRef(4)}
-            page = await graph.aread_log(config, "messages")
-            assert contents(page) == ["a", "reply to a", "b", "reply to b"]
-
-
-def test_log_entries_are_not_stored_in_checkpoints() -> None:
-    saver = InMemorySaver()
-    graph = chat_graph(saver)
-    config = {"configurable": {"thread_id": "1"}}
-    for i in range(20):
-        graph.invoke({"messages": [HumanMessage(f"m{i}")]}, config)
-    assert not [k for k in saver.blobs if k[2] == "messages"]
-    log = saver.log.logs[("1", "", "messages")]
-    stored = sum(len(rows) for rows in log.entries.values())
-    # each entry stored once: linear in the transcript
-    assert stored == 40 == graph.read_log(config, "messages").length
-    assert len(log.segments) == 1
-
-
-def test_parallel_tasks_keep_one_order(saver: BaseCheckpointSaver) -> None:
-    class State(TypedDict):
-        events: Annotated[list, Log()]
-        seen: Annotated[list, operator.add]
-
-    def fan_out(state: State) -> list[Send]:
-        return [Send("worker", {"i": i}) for i in range(5)]
-
-    def worker(arg: dict) -> dict:
-        return {"events": [{"worker": arg["i"]}, {"worker": arg["i"], "n": 2}]}
-
-    def after(state: State) -> dict:
-        return {"seen": [list(state["events"])]}
-
-    builder = StateGraph(State)
-    builder.add_node("worker", worker)
-    builder.add_node("after", after)
-    builder.add_conditional_edges(START, fan_out, ["worker"])
-    builder.add_edge("worker", "after")
-    builder.add_edge("after", END)
-    graph = builder.compile(checkpointer=saver)
-    config = {"configurable": {"thread_id": "1"}}
-    out = graph.invoke({"events": [], "seen": []}, config)
-    in_run = out["seen"][-1]
-    assert len(in_run) == 10
-    # read back after the run: the same order the run's nodes saw
-    assert contents(graph.read_log(config, "events")) == in_run
-
-
-def test_interrupt_and_resume_reuse_finished_writes(
-    saver: BaseCheckpointSaver,
-) -> None:
-    calls: list[str] = []
-
-    class State(TypedDict):
-        events: Annotated[list, Log()]
-
-    def fast(state: State) -> dict:
-        calls.append("fast")
-        return {"events": [{"from": "fast"}]}
-
-    def asks(state: State) -> dict:
-        answer = interrupt("question")
-        calls.append("asks")
-        return {"events": [{"from": "asks", "answer": answer}]}
-
-    builder = StateGraph(State)
-    builder.add_node("fast", fast)
-    builder.add_node("asks", asks)
-    builder.add_edge(START, "fast")
-    builder.add_edge(START, "asks")
-    builder.add_edge(["fast", "asks"], END)
-    graph = builder.compile(checkpointer=saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke({"events": [{"from": "input"}]}, config)
-    # fast finished; its entry is pending at the head, not committed
-    page = saver.read_log(config, "events")
-    assert page.length == 1
-    assert page.pending == [{"from": "fast"}]
-
-    out = graph.invoke(Command(resume="yes"), config)
-    assert calls == ["fast", "asks"]  # fast was not re-run
-    # the reused write and the new one commit as one step, in path order,
-    # and the log reads back exactly what the run's state held
-    assert out["events"] == [
-        {"from": "input"},
-        {"from": "asks", "answer": "yes"},
-        {"from": "fast"},
-    ]
-    assert contents(graph.read_log(config, "events")) == out["events"]
-    assert graph.read_log(config, "events").pending == []
-
-
-def test_time_travel_forks_without_touching_the_original(
-    saver: BaseCheckpointSaver,
-) -> None:
-    graph = chat_graph(saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke({"messages": [HumanMessage("a")]}, config)
-    graph.invoke({"messages": [HumanMessage("b")]}, config)
-    original = graph.get_state(config).config
-    # the checkpoint before the second reply ("b" added, model not run)
-    before_reply = next(
-        s
-        for s in graph.get_state_history(config)
-        if s.next == ("model",) and graph.read_log(s.config, "messages").length == 3
-    )
-    graph.invoke(None, before_reply.config)  # replay: a new branch
-    head = graph.get_state(config).config
-    assert (
-        head["configurable"]["checkpoint_id"]
-        != original["configurable"]["checkpoint_id"]
-    )
-    assert contents(graph.read_log(head, "messages")) == [
-        "a",
-        "reply to a",
-        "b",
-        "reply to b",
-    ]
-    assert contents(graph.read_log(original, "messages")) == [
-        "a",
-        "reply to a",
-        "b",
-        "reply to b",
-    ]
-    a = graph.read_log(head, "messages").entries
-    b = graph.read_log(original, "messages").entries
-    # same prefix, different last message (a new run of the model node)
-    assert [m.id for _, m in a[:3]] == [m.id for _, m in b[:3]]
-    assert a[3][1].id != b[3][1].id
-    if isinstance(saver, InMemorySaver):
-        assert len(saver.log.logs[("1", "", "messages")].segments) == 2
-
-
-def test_update_state_fork_starts_a_branch(saver: BaseCheckpointSaver) -> None:
-    graph = chat_graph(saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke({"messages": [HumanMessage("a")]}, config)
-    graph.invoke({"messages": [HumanMessage("b")]}, config)
-    original = graph.get_state(config).config
-    first_turn = next(
-        s
-        for s in graph.get_state_history(config)
-        if graph.read_log(s.config, "messages").length == 2
-        and s.metadata["source"] == "loop"
-    )
-    # edit: fork from the end of the first turn with a different question
-    forked = graph.update_state(
-        first_turn.config, {"messages": [HumanMessage("c")]}, as_node="model"
-    )
-    assert contents(graph.read_log(forked, "messages")) == ["a", "reply to a", "c"]
-    graph.invoke(Command(goto="model"), forked)
-    head = graph.get_state(config).config
-    assert contents(graph.read_log(head, "messages")) == [
-        "a",
-        "reply to a",
-        "c",
-        "reply to c",
-    ]
-    assert contents(graph.read_log(original, "messages")) == [
-        "a",
-        "reply to a",
-        "b",
-        "reply to b",
-    ]
-
-
-def test_subgraph_has_its_own_log(saver: BaseCheckpointSaver) -> None:
-    class Sub(TypedDict):
-        notes: Annotated[list, Log()]
-
-    def note(state: Sub) -> dict:
-        return {"notes": [{"n": len(state.get("notes", []))}]}
-
-    sub_builder = StateGraph(Sub)
-    sub_builder.add_node("note", note)
-    sub_builder.add_edge(START, "note")
-    sub = sub_builder.compile(checkpointer=True)
-
-    class Parent(TypedDict):
-        messages: Annotated[list, MessagesLog()]
-
-    def call_sub(state: Parent) -> dict:
-        sub.invoke({"notes": [{"from": "parent"}]})
-        return {"messages": [AIMessage("done")]}
-
-    builder = StateGraph(Parent)
-    builder.add_node("call_sub", call_sub)
-    builder.add_edge(START, "call_sub")
-    graph = builder.compile(checkpointer=saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke({"messages": [HumanMessage("go")]}, config)
-    graph.invoke({"messages": [HumanMessage("again")]}, config)
-    assert contents(graph.read_log(config, "messages")) == [
-        "go",
-        "done",
-        "again",
-        "done",
-    ]
-    sub_config = {"configurable": {"thread_id": "1", "checkpoint_ns": "call_sub"}}
-    assert contents(saver.read_log(sub_config, "notes")) == [
-        {"from": "parent"},
-        {"n": 1},
-        {"from": "parent"},
-        {"n": 3},
-    ]
-
-
-def test_exit_durability_commits_inline(saver: BaseCheckpointSaver) -> None:
-    graph = chat_graph(saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke({"messages": [HumanMessage("a")]}, config, durability="exit")
-    graph.invoke({"messages": [HumanMessage("b")]}, config, durability="exit")
-    assert contents(graph.read_log(config, "messages")) == [
-        "a",
-        "reply to a",
-        "b",
-        "reply to b",
-    ]
-
-
-def test_prune_keeps_the_heads_transcript() -> None:
-    saver = InMemorySaver()
-    graph = chat_graph(saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke({"messages": [HumanMessage("a")]}, config)
-    graph.invoke({"messages": [HumanMessage("b")]}, config)
-    original = graph.get_state(config).config
-    before_reply = next(
-        s
-        for s in graph.get_state_history(config)
-        if s.next == ("model",) and graph.read_log(s.config, "messages").length == 3
-    )
-    graph.invoke(None, before_reply.config)
-    log = saver.log.logs[("1", "", "messages")]
-    assert len(log.segments) == 2
-
-    saver.prune(["1"], strategy="keep_latest")
-    assert len(saver.storage["1"][""]) == 1
-    # the head's full transcript survives without its ancestors' checkpoints
-    assert contents(graph.read_log(config, "messages")) == [
-        "a",
-        "reply to a",
-        "b",
-        "reply to b",
-    ]
-    # the abandoned branch is collected
-    log = saver.log.logs[("1", "", "messages")]
-    assert sum(len(r) for r in log.entries.values()) == 4
-    assert len(log.steps) == 4
-    assert graph.read_log(original, "messages").length == 0  # its checkpoint is gone
-
-    # the thread keeps working after prune
-    graph.invoke({"messages": [HumanMessage("c")]}, config)
-    assert graph.read_log(config, "messages").length == 6
-
-    saver.prune(["1"], strategy="delete")
-    assert ("1", "", "messages") not in saver.log.logs
-
-
-def test_rollback_collects_the_runs_entries() -> None:
-    saver = InMemorySaver()
-    graph = chat_graph(saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke(
-        {"messages": [HumanMessage("a")]}, {**config, "metadata": {"run_id": "r1"}}
-    )
-    graph.invoke(
-        {"messages": [HumanMessage("b")]}, {**config, "metadata": {"run_id": "r2"}}
-    )
-    saver.delete_for_runs(["r2"])
-    assert contents(graph.read_log(config, "messages")) == ["a", "reply to a"]
-    log = saver.log.logs[("1", "", "messages")]
-    assert sum(len(r) for r in log.entries.values()) == 2
-    # the tip moved back: the next run continues the same segment
-    graph.invoke({"messages": [HumanMessage("c")]}, config)
-    assert contents(graph.read_log(config, "messages")) == [
-        "a",
-        "reply to a",
-        "c",
-        "reply to c",
-    ]
-    assert len(saver.log.logs[("1", "", "messages")].segments) == 1
-
-
-def test_copy_and_delete_thread() -> None:
-    saver = InMemorySaver()
-    graph = chat_graph(saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke({"messages": [HumanMessage("a")]}, config)
-    saver.copy_thread("1", "2")
-    copy_config = {"configurable": {"thread_id": "2"}}
-    graph.invoke({"messages": [HumanMessage("b")]}, copy_config)
-    assert contents(graph.read_log(config, "messages")) == ["a", "reply to a"]
-    assert contents(graph.read_log(copy_config, "messages")) == [
-        "a",
-        "reply to a",
-        "b",
-        "reply to b",
-    ]
-    saver.delete_thread("1")
-    assert ("1", "", "messages") not in saver.log.logs
-    assert graph.read_log(copy_config, "messages").length == 4
-
-
-def test_log_takes_only_json(saver: BaseCheckpointSaver) -> None:
-    class State(TypedDict):
-        events: Annotated[list, Log()]
-
-    def bad(state: State) -> dict:
-        return {"events": [{"when": object()}]}
-
-    builder = StateGraph(State)
-    builder.add_node("bad", bad)
-    builder.add_edge(START, "bad")
-    graph = builder.compile(checkpointer=saver)
-    with pytest.raises(InvalidUpdateError, match="not JSON"):
-        graph.invoke({"events": [{"ok": 1}]}, {"configurable": {"thread_id": "1"}})
-    with pytest.raises(InvalidUpdateError, match="not JSON"):
-        graph.invoke({"events": [float("nan")]}, {"configurable": {"thread_id": "2"}})
-
-
-@pytest.mark.parametrize(
-    "write",
-    [
-        pytest.param(lambda s: [RemoveMessage(id=s["messages"][0].id)], id="remove"),
-        pytest.param(lambda s: Overwrite([AIMessage("x")]), id="overwrite"),
-        pytest.param(lambda s: [s["messages"][0]], id="replace-by-id"),
-        pytest.param(lambda s: s["messages"] + [AIMessage("x")], id="whole-list"),
-    ],
-)
-def test_messages_log_rejects_edits(saver: BaseCheckpointSaver, write: Any) -> None:
-    def edits(state: ChatState) -> dict:
-        return {"messages": write(state)}
-
-    builder = StateGraph(ChatState)
-    builder.add_node("edits", edits)
-    builder.add_edge(START, "edits")
-    graph = builder.compile(checkpointer=saver)
-    with pytest.raises(InvalidUpdateError):
-        graph.invoke(
-            {"messages": [HumanMessage("a")]}, {"configurable": {"thread_id": "1"}}
-        )
-
-
-def test_fallback_and_native_read_the_same_log() -> None:
-    def run(saver: BaseCheckpointSaver) -> list[list[Any]]:
-        graph = chat_graph(saver)
-        config = {"configurable": {"thread_id": "1"}}
-        for q in "abc":
-            graph.invoke({"messages": [HumanMessage(q)]}, config)
-        return [
-            contents(graph.read_log(s.config, "messages"))
-            for s in graph.get_state_history(config)
-        ]
-
-    conn = sqlite3.connect(":memory:", check_same_thread=False)
-    try:
-        assert run(InMemorySaver()) == run(SqliteSaver(conn))
-    finally:
-        conn.close()
-
-
-def test_resume_at_a_superseded_checkpoint_branches(
-    saver: BaseCheckpointSaver,
-) -> None:
-    """A resume at a checkpoint the thread moved past re-runs finished tasks on
-    that same checkpoint, without a fork checkpoint. The log puts the re-run
-    in a new segment and leaves the original branch alone."""
-    calls: list[str] = []
-
-    class State(TypedDict):
-        events: Annotated[list, Log()]
-
-    def fast(state: State) -> dict:
-        calls.append("fast")
-        return {"events": [{"from": "fast", "run": len(calls)}]}
-
-    def asks(state: State) -> dict:
-        answer = interrupt("question")
-        return {"events": [{"from": "asks", "answer": answer}]}
-
-    builder = StateGraph(State)
-    builder.add_node("fast", fast)
-    builder.add_node("asks", asks)
-    builder.add_edge(START, "fast")
-    builder.add_edge(START, "asks")
-    builder.add_edge(["fast", "asks"], END)
-    graph = builder.compile(checkpointer=saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke({"events": [{"from": "input"}]}, config)
-    interrupted = graph.get_state(config).config
-    first = graph.invoke(Command(resume="yes"), config)["events"]
-    original_head = graph.get_state(config).config
-
-    second = graph.invoke(Command(resume="no"), interrupted)["events"]
-    assert calls == ["fast", "fast"]  # the finished task re-ran
-    new_head = graph.get_state(config).config
-    assert contents(graph.read_log(new_head, "events")) == second
-    assert contents(graph.read_log(original_head, "events")) == first
-    assert first != second
-    if isinstance(saver, InMemorySaver):
-        assert len(saver.log.logs[("1", "", "events")].segments) == 2
-
-
-def test_tool_calling_agent_runs_on_a_messages_log(
-    saver: BaseCheckpointSaver,
-) -> None:
-    """Prebuilt `ToolNode` and `tools_condition` work unchanged: they read the
-    list and append messages."""
-
-    @tool
-    def add(a: int, b: int) -> int:
-        """Add two numbers."""
-        return a + b
-
-    def model(state: ChatState) -> dict:
-        last = state["messages"][-1]
-        if isinstance(last, HumanMessage):
-            call = {
-                "name": "add",
-                "args": {"a": 2, "b": 3},
-                "id": f"call-{len(state['messages'])}",
-            }
-            return {"messages": [AIMessage("", tool_calls=[call])]}
-        return {"messages": [AIMessage(f"the answer is {last.content}")]}
-
-    builder = StateGraph(ChatState)
-    builder.add_node("model", model)
-    builder.add_node("tools", ToolNode([add]))
-    builder.add_edge(START, "model")
-    builder.add_conditional_edges("model", tools_condition)
-    builder.add_edge("tools", "model")
-    graph = builder.compile(checkpointer=saver)
-    config = {"configurable": {"thread_id": "1"}}
-    out = graph.invoke({"messages": [HumanMessage("2+3?")]}, config)
-    assert [type(m).__name__ for m in out["messages"]] == [
-        "HumanMessage",
-        "AIMessage",
-        "ToolMessage",
-        "AIMessage",
-    ]
-    page = graph.read_log(config, "messages")
-    assert [m.id for _, m in page.entries] == [m.id for m in out["messages"]]
-    assert page.entries[-1][1].content == "the answer is 5"
-
-
-def test_input_after_update_state_reads_the_inline_step(
-    saver: BaseCheckpointSaver,
-) -> None:
-    """`update_state` commits its entries inline; the input checkpoint after
-    it keeps the version with a stripped marker, and reads must still find
-    the entries on the checkpoint that committed them."""
-    graph = chat_graph(saver)
-    config = {"configurable": {"thread_id": "1"}}
-    graph.invoke({"messages": [HumanMessage("a")]}, config)
-    graph.update_state(config, {"messages": [HumanMessage("note")]})
-    graph.invoke({"messages": [HumanMessage("b")]}, config)
-    assert contents(graph.read_log(config, "messages")) == [
-        "a",
-        "reply to a",
-        "note",
-        "b",
-        "reply to b",
-    ]
-
-
-# -- existing `add_messages` threads ------------------------------------------
-
-
-class OldChatState(TypedDict):
-    messages: Annotated[list, add_messages]
-
-
-def _reply(state: dict) -> dict:
-    return {"messages": [AIMessage(f"reply to {state['messages'][-1].content}")]}
-
-
-def _chat(schema: type, saver: BaseCheckpointSaver, **nodes: Any):
-    builder = StateGraph(schema)
-    builder.add_node("model", nodes.get("model", _reply))
-    builder.add_edge(START, "model")
-    if "review" in nodes:
-        builder.add_node("review", nodes["review"])
-        builder.add_edge("model", "review")
-        builder.add_edge("review", END)
-    else:
-        builder.add_edge("model", END)
-    return builder.compile(checkpointer=saver)
-
-
-def test_add_messages_thread_switches_to_messages_log(
-    saver: BaseCheckpointSaver,
-) -> None:
-    """A thread written with `add_messages` keeps working on `MessagesLog`:
-    the stored list is the log's first entries."""
-    config = {"configurable": {"thread_id": "1"}}
-    old = _chat(OldChatState, saver)
-    old.invoke({"messages": [HumanMessage("a", id="h1")]}, config)
-    old.invoke({"messages": [HumanMessage("b", id="h2")]}, config)
-    before_switch = old.get_state(config).config
-
-    new = _chat(ChatState, saver)
-    out = new.invoke({"messages": [HumanMessage("c", id="h3")]}, config)
-    assert [m.content for m in out["messages"]] == [
-        "a",
-        "reply to a",
-        "b",
-        "reply to b",
-        "c",
-        "reply to c",
-    ]
-    assert new.get_state(config).values == {"messages": LogRef(6)}
-    page = new.read_log(config, "messages")
-    assert [p for p, _ in page.entries] == list(range(6))
-    assert contents(page) == [m.content for m in out["messages"]]
-    assert [m.id for _, m in page.entries][:1] == ["h1"]
-    # checkpoints from before the switch still read as the list they stored
-    assert contents(new.read_log(before_switch, "messages")) == [
-        "a",
-        "reply to a",
-        "b",
-        "reply to b",
-    ]
-    assert len(new.get_state(before_switch).values["messages"]) == 4
-    # the next turn appends after the seed
-    new.invoke({"messages": [HumanMessage("d")]}, config)
-    assert new.read_log(config, "messages").length == 8
-    if isinstance(saver, InMemorySaver):
-        log = saver.log.logs[("1", "", "messages")]
-        assert sum(len(rows) for rows in log.entries.values()) == 8
-
-
-def test_switch_with_an_interrupted_add_messages_run(
-    saver: BaseCheckpointSaver,
-) -> None:
-    """The first checkpoint after the switch can come from the loop (a
-    resume), not graph input; the seed is committed with it."""
-
-    def review(state: dict) -> dict:
-        answer = interrupt("approve?")
-        return {"messages": [AIMessage(f"review: {answer}")]}
-
-    config = {"configurable": {"thread_id": "1"}}
-    old = _chat(OldChatState, saver, review=review)
-    old.invoke({"messages": [HumanMessage("a")]}, config)
-    assert old.get_state(config).next == ("review",)
-
-    new = _chat(ChatState, saver, review=review)
-    out = new.invoke(Command(resume="ok"), config)
-    assert [m.content for m in out["messages"]] == ["a", "reply to a", "review: ok"]
-    assert contents(new.read_log(config, "messages")) == [
-        "a",
-        "reply to a",
-        "review: ok",
-    ]
-
-
-def test_switch_then_update_state(saver: BaseCheckpointSaver) -> None:
-    config = {"configurable": {"thread_id": "1"}}
-    old = _chat(OldChatState, saver)
-    old.invoke({"messages": [HumanMessage("a")]}, config)
-    new = _chat(ChatState, saver)
-    new.update_state(config, {"messages": [HumanMessage("note")]})
-    assert contents(new.read_log(config, "messages")) == ["a", "reply to a", "note"]
-    out = new.invoke({"messages": [HumanMessage("b")]}, config)
-    assert [m.content for m in out["messages"]][-2:] == ["b", "reply to b"]
-    assert new.read_log(config, "messages").length == 5
-
-
-# -- deprecation of message edit ops on `add_messages` -------------------------
-
-
-@pytest.mark.parametrize(
-    "edit",
-    [
-        pytest.param(lambda s: [RemoveMessage(id=s["messages"][0].id)], id="remove"),
-        pytest.param(
-            lambda s: [RemoveMessage(id=REMOVE_ALL_MESSAGES), AIMessage("x")],
-            id="remove-all",
-        ),
-        pytest.param(
-            lambda s: [HumanMessage("edited", id=s["messages"][0].id)],
-            id="replace-by-id",
-        ),
-        pytest.param(lambda s: Overwrite([AIMessage("x")]), id="overwrite"),
-    ],
-)
-def test_add_messages_edit_ops_are_deprecated(edit: Any) -> None:
-    def node(state: dict) -> dict:
-        return {"messages": edit(state)}
-
-    graph = _chat(OldChatState, InMemorySaver(), model=node)
-    with pytest.warns(LangGraphDeprecatedSinceV13, match="MessagesLog"):
-        graph.invoke(
-            {"messages": [HumanMessage("a")]}, {"configurable": {"thread_id": "1"}}
-        )
-
-
-def test_add_messages_appends_are_not_deprecated() -> None:
-    graph = _chat(OldChatState, InMemorySaver())
-    with warnings.catch_warnings():
-        warnings.simplefilter("error", LangGraphDeprecatedSinceV13)
-        graph.invoke(
-            {"messages": [HumanMessage("a")]}, {"configurable": {"thread_id": "1"}}
-        )
@@ -0,0 +1,339 @@
+"""Tests for `Runtime.on_exit`: cleanup that runs however a graph run ends."""
+
+from __future__ import annotations
+
+import asyncio
+import sys
+
+import pytest
+from langgraph.checkpoint.memory import InMemorySaver
+from typing_extensions import TypedDict
+
+from langgraph.graph import END, START, StateGraph
+from langgraph.runtime import Runtime, get_runtime
+from langgraph.types import Command, interrupt
+
+pytestmark = pytest.mark.anyio
+
+NEEDS_CONTEXTVARS = pytest.mark.skipif(
+    sys.version_info < (3, 11),
+    reason="Python 3.11+ is required for async contextvars support",
+)
+
+
+class State(TypedDict, total=False):
+    value: str
+
+
+def _two_node_graph(first, second=None, *, checkpointer=None):
+    builder = StateGraph(State)
+    builder.add_node("first", first)
+    builder.add_edge(START, "first")
+    if second is None:
+        builder.add_edge("first", END)
+    else:
+        builder.add_node("second", second)
+        builder.add_edge("first", "second")
+        builder.add_edge("second", END)
+    return builder.compile(checkpointer=checkpointer)
+
+
+# sync
+
+
+def test_runs_on_success_in_lifo_order() -> None:
+    events: list[str] = []
+
+    def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(lambda: events.append("cleanup-a"))
+        runtime.on_exit(lambda: events.append("cleanup-b"))
+        events.append("first")
+        return {"value": "x"}
+
+    def second(state: State) -> State:
+        events.append("second")
+        return {}
+
+    graph = _two_node_graph(first, second)
+    assert graph.invoke({}) == {"value": "x"}
+    assert events == ["first", "second", "cleanup-b", "cleanup-a"]
+
+
+def test_runs_on_error_and_keeps_the_run_exception() -> None:
+    events: list[str] = []
+
+    def failing_cleanup() -> None:
+        events.append("failing")
+        raise KeyError("cleanup failed")
+
+    def first(state: State) -> State:
+        runtime = get_runtime()
+        runtime.on_exit(lambda: events.append("cleanup"))
+        runtime.on_exit(failing_cleanup)
+        raise ValueError("node failed")
+
+    graph = _two_node_graph(first)
+    with pytest.raises(ValueError, match="node failed"):
+        graph.invoke({})
+    # the failing callback did not stop the earlier one from running
+    assert events == ["failing", "cleanup"]
+
+
+def test_callback_error_is_raised_when_the_run_succeeded() -> None:
+    def failing_cleanup() -> None:
+        raise KeyError("cleanup failed")
+
+    def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(failing_cleanup)
+        return {}
+
+    graph = _two_node_graph(first)
+    with pytest.raises(KeyError, match="cleanup failed"):
+        graph.invoke({})
+
+
+def test_runs_on_interrupt() -> None:
+    events: list[str] = []
+
+    def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(lambda: events.append("cleanup"))
+        return {"value": interrupt("approve?")}
+
+    graph = _two_node_graph(first, checkpointer=InMemorySaver())
+    config = {"configurable": {"thread_id": "1"}}
+    result = graph.invoke({}, config)
+    assert "__interrupt__" in result
+    assert events == ["cleanup"]
+
+    # each resumed run is its own invocation with its own callbacks
+    graph.invoke(Command(resume="ok"), config)
+    assert events == ["cleanup", "cleanup"]
+
+
+def test_runs_when_the_stream_is_closed_early() -> None:
+    events: list[str] = []
+
+    def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(lambda: events.append("cleanup"))
+        return {"value": "x"}
+
+    def second(state: State) -> State:
+        events.append("second")
+        return {}
+
+    graph = _two_node_graph(first, second)
+    stream = graph.stream({}, stream_mode="updates")
+    assert next(stream) == {"first": {"value": "x"}}
+    assert events == []
+    stream.close()
+    assert events == ["cleanup"]
+
+
+def test_runs_when_breaking_out_of_stream() -> None:
+    events: list[str] = []
+
+    def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(lambda: events.append("cleanup"))
+        return {"value": "x"}
+
+    graph = _two_node_graph(first, lambda s: {})
+    for _ in graph.stream({}, stream_mode="updates"):
+        break
+    # the dropped generator is closed by refcounting on CPython
+    assert events == ["cleanup"]
+
+
+def test_subgraph_registers_on_the_root_run() -> None:
+    events: list[str] = []
+
+    def inner(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(lambda: events.append("cleanup"))
+        events.append("inner")
+        return {}
+
+    sub = StateGraph(State)
+    sub.add_node("inner", inner)
+    sub.add_edge(START, "inner")
+    subgraph = sub.compile()
+
+    def call_subgraph(state: State) -> State:
+        subgraph.invoke(state)
+        events.append("subgraph returned")
+        return {}
+
+    def after(state: State) -> State:
+        events.append("after")
+        return {}
+
+    builder = StateGraph(State)
+    builder.add_node("as_node", subgraph)
+    builder.add_node("call_subgraph", call_subgraph)
+    builder.add_node("after", after)
+    builder.add_edge(START, "as_node")
+    builder.add_edge("as_node", "call_subgraph")
+    builder.add_edge("call_subgraph", "after")
+    graph = builder.compile()
+
+    graph.invoke({})
+    # nothing runs when either subgraph ends; both run when the root ends
+    assert events == [
+        "inner",
+        "inner",
+        "subgraph returned",
+        "after",
+        "cleanup",
+        "cleanup",
+    ]
+
+
+def test_async_callback_rejected_in_sync_run() -> None:
+    async def acleanup() -> None:
+        pass
+
+    def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(acleanup)
+        return {}
+
+    graph = _two_node_graph(first)
+    with pytest.raises(TypeError, match="async callback in a synchronous"):
+        graph.invoke({})
+
+
+def test_outside_a_run_raises() -> None:
+    with pytest.raises(RuntimeError, match="during a graph run"):
+        Runtime().on_exit(lambda: None)
+
+
+def test_each_invocation_gets_its_own_callbacks() -> None:
+    calls: list[int] = []
+
+    def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(lambda: calls.append(1))
+        return {}
+
+    graph = _two_node_graph(first)
+    graph.invoke({})
+    graph.invoke({})
+    assert calls == [1, 1]
+
+
+# async
+
+
+async def test_async_runs_on_success_sync_and_async_callbacks() -> None:
+    events: list[str] = []
+
+    async def acleanup() -> None:
+        await asyncio.sleep(0)
+        events.append("async-cleanup")
+
+    async def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(lambda: events.append("sync-cleanup"))
+        runtime.on_exit(acleanup)
+        events.append("first")
+        return {"value": "x"}
+
+    graph = _two_node_graph(first)
+    assert await graph.ainvoke({}) == {"value": "x"}
+    assert events == ["first", "async-cleanup", "sync-cleanup"]
+
+
+async def test_async_runs_on_error_and_keeps_the_run_exception() -> None:
+    events: list[str] = []
+
+    async def failing_cleanup() -> None:
+        raise KeyError("cleanup failed")
+
+    async def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(lambda: events.append("cleanup"))
+        runtime.on_exit(failing_cleanup)
+        raise ValueError("node failed")
+
+    graph = _two_node_graph(first)
+    with pytest.raises(ValueError, match="node failed"):
+        await graph.ainvoke({})
+    assert events == ["cleanup"]
+
+
+async def test_async_runs_on_interrupt() -> None:
+    events: list[str] = []
+
+    async def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(lambda: events.append("cleanup"))
+        return {"value": interrupt("approve?")}
+
+    graph = _two_node_graph(first, checkpointer=InMemorySaver())
+    result = await graph.ainvoke({}, {"configurable": {"thread_id": "1"}})
+    assert "__interrupt__" in result
+    assert events == ["cleanup"]
+
+
+async def test_async_runs_on_cancel_after_the_node_unwinds() -> None:
+    events: list[str] = []
+    started = asyncio.Event()
+
+    async def acleanup() -> None:
+        events.append("cleanup")
+
+    async def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(acleanup)
+        started.set()
+        try:
+            await asyncio.sleep(60)
+        finally:
+            events.append("node finally")
+        return {}
+
+    graph = _two_node_graph(first)
+    task = asyncio.create_task(graph.ainvoke({}))
+    await started.wait()
+    task.cancel()
+    with pytest.raises(asyncio.CancelledError):
+        await task
+    # cleanup ran after the node had stopped
+    assert events == ["node finally", "cleanup"]
+
+
+async def test_async_runs_when_the_stream_is_closed_early() -> None:
+    events: list[str] = []
+
+    async def acleanup() -> None:
+        events.append("cleanup")
+
+    async def first(state: State, runtime: Runtime) -> State:
+        runtime.on_exit(acleanup)
+        return {"value": "x"}
+
+    async def second(state: State) -> State:
+        events.append("second")
+        return {}
+
+    graph = _two_node_graph(first, second)
+    stream = graph.astream({}, stream_mode="updates")
+    assert await stream.__anext__() == {"first": {"value": "x"}}
+    assert events == []
+    await stream.aclose()
+    assert events == ["cleanup"]
+
+
+@NEEDS_CONTEXTVARS
+async def test_async_subgraph_registers_on_the_root_run() -> None:
+    events: list[str] = []
+
+    async def inner(state: State) -> State:
+        get_runtime().on_exit(lambda: events.append("cleanup"))
+        return {}
+
+    sub = StateGraph(State)
+    sub.add_node("inner", inner)
+    sub.add_edge(START, "inner")
+    subgraph = sub.compile()
+
+    async def call_subgraph(state: State) -> State:
+        await subgraph.ainvoke(state)
+        events.append("subgraph returned")
+        return {}
+
+    graph = _two_node_graph(call_subgraph, lambda s: events.append("after") or {})
+    await graph.ainvoke({})
+    assert events == ["subgraph returned", "after", "cleanup"]
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@@ -3668,14 +3669,14 @@ wheels = [

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+version = "2.33.0.20260906"
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 [[package]]
@@ -1,21 +1,6 @@
 # Changelog

-## 0.4.12
-
-### Removed
-
- **`PrioritySettings.fairness_weight`** — removed. The server stores only
-  `priority` and `fairness_group` on the thread; it ignores a
-  `fairness_weight` and logs a warning. Remove it from your callback.
-
-### Changed
-
- **`PrioritySettings.priority`** — now says -5 runs first and 5 runs last,
-  matching how the server orders runs. 0.4.9 to 0.4.11 said the reverse, and
-  their example gave premium users 3, which runs them after everyone at the
-  default 0. Check any callback written from those docs.
-
-## 0.4.11 and earlier
+## Unreleased

 ### Added

@@ -53,7 +38,7 @@
  and name the object in the `priority` section of `langgraph.json`. The
  server calls the function with a `PriorityContext` at the first run on a
  thread with no settings and stores the `PrioritySettings` it returns
-  (`priority`, `fairness_group`) on the thread. Requires
+  (`priority`, `fairness_group`, `fairness_weight`) on the thread. Requires
  `langgraph-api` 0.18.0 or later and a `langgraph-cli` that supports the
  section; older versions of either ignore it.

@@ -5,7 +5,7 @@ from langgraph_sdk.encryption.types import DecryptResult, EncryptionContext
 from langgraph_sdk.priority import Priority
 from langgraph_sdk.priority.types import PriorityContext, PrioritySettings

-__version__ = "0.4.12"
+__version__ = "0.4.11"

 __all__ = [
    "Auth",
@@ -15,8 +15,6 @@ import orjson
 from langgraph_sdk._shared.utilities import (
    _orjson_default,
    _reconnect_delay,
-    _run_check_headers,
-    _run_url_from_stream_location,
    _validate_reconnect_location,
 )
 from langgraph_sdk.errors import (
@@ -234,7 +232,6 @@ class HttpClient:
        reconnect_path: str | None = None
        reconnect_attempts = 0
        max_reconnect_attempts = 5
-        run_ended = False

        while True:
            current_headers = dict(
@@ -304,7 +301,6 @@ class HttpClient:
                                    # Progress since the last drop earns a fresh
                                    # set of reconnect attempts.
                                    reconnect_attempts = 0
-                                    run_ended |= sse.event in ("end", "error")
                                    yield sse
                    except httpx.HTTPError as err:
                        # httpx.TransportError inherits from HTTPError, so transient
@@ -321,7 +317,6 @@ class HttpClient:
                                # return an empty placeholder when there is no pending
                                # message. Skip these no-op events so the stream doesn't
                                # emit a trailing blank item after reconnects.
-                                run_ended |= sse.event in ("end", "error")
                                yield sse
            except (httpx.TransportError, RateLimitError, InternalServerError) as err:
                # A reconnect that can't open (connection refused, 429, 5xx or a
@@ -331,13 +326,6 @@ class HttpClient:
                if reconnect_path is None:
                    raise
                reconnect_cause = err
-            # A run's stream closes cleanly both when the run ends and when a
-            # proxy timeout or a server restart cuts it. Without an `end` or
-            # `error` event the two look the same, so ask the run.
-            if reconnect_cause is None and reconnect_path is not None and not run_ended:
-                reconnect_cause = await _acheck_run(
-                    self.client, reconnect_path, reconnect_headers
-                )
            if reconnect_cause is not None:
                reconnect_attempts += 1
                if reconnect_attempts > max_reconnect_attempts:
@@ -374,28 +362,3 @@ async def _adecode_json(r: httpx.Response) -> Any:
        if body
        else None
    )
-
-
-async def _acheck_run(
-    client: httpx.AsyncClient, stream_location: str, headers: Mapping[str, str]
-) -> httpx.HTTPError | None:
-    run_url = _run_url_from_stream_location(stream_location)
-    if run_url is None:
-        return None
-    try:
-        r = await client.get(run_url, headers=_run_check_headers(headers))
-        if r.status_code == 429 or r.status_code >= 500:
-            await _araise_for_status_typed(r)
-        status = (await _adecode_json(r))["status"] if r.is_success else None
-    except (httpx.TransportError, RateLimitError, InternalServerError) as err:
-        # The restart that closed the stream can fail the check too, so retry
-        # it like a drop.
-        return err
-    except Exception:
-        # Anything else must not turn a normal end of stream into an error.
-        return None
-    if status in ("pending", "running"):
-        return httpx.TransportError(
-            "Stream closed while the run was still pending or running"
-        )
-    return None
@@ -21,7 +21,6 @@ from langgraph_sdk.schema import (
    ThreadSelectField,
    ThreadSortBy,
    ThreadState,
-    ThreadStateSelectField,
    ThreadStatus,
    ThreadStreamMode,
    ThreadUpdateStateResponse,
@@ -490,7 +489,6 @@ class ThreadsClient:
        checkpoint_id: str | None = None,  # deprecated
        *,
        subgraphs: bool = False,
-        select: list[ThreadStateSelectField] | None = None,
        headers: Mapping[str, str] | None = None,
        params: QueryParamTypes | None = None,
    ) -> ThreadState:
@@ -501,9 +499,6 @@ class ThreadsClient:
            checkpoint: The checkpoint to get the state of.
            checkpoint_id: (deprecated) The checkpoint ID to get the state of.
            subgraphs: Include subgraphs states.
-            select: Fields to include in the response. Use `values.<key>` to
-                return a single state key (e.g. `values.messages`), which lets the
-                server skip loading the rest of the state. Defaults to all fields.
            headers: Optional custom headers to include with the request.
            params: Optional query parameters to include with the request.

@@ -596,30 +591,16 @@ class ThreadsClient:
                    }
            }
            ```
-
-            Fetch only the `messages` state key:
-
-            ```python
-            thread_state = await client.threads.get_state(
-                thread_id="my_thread_id",
-                select=["values.messages"],
-            )
-            ```
        """
        if checkpoint:
-            payload: dict[str, Any] = {"checkpoint": checkpoint, "subgraphs": subgraphs}
-            if select:
-                payload["select"] = select
            return await self.http.post(
                f"/threads/{_quote_path_param(thread_id)}/state/checkpoint",
-                json=payload,
+                json={"checkpoint": checkpoint, "subgraphs": subgraphs},
                headers=headers,
                params=params,
            )
        elif checkpoint_id:
-            get_params: dict[str, Any] = {"subgraphs": subgraphs}
-            if select:
-                get_params["select"] = select
+            get_params = {"subgraphs": subgraphs}
            if params:
                get_params = {**get_params, **dict(params)}
            return await self.http.get(
@@ -628,9 +609,7 @@ class ThreadsClient:
                headers=headers,
            )
        else:
-            get_params: dict[str, Any] = {"subgraphs": subgraphs}
-            if select:
-                get_params["select"] = select
+            get_params = {"subgraphs": subgraphs}
            if params:
                get_params = {**get_params, **dict(params)}
            return await self.http.get(
@@ -713,7 +692,6 @@ class ThreadsClient:
        before: str | Checkpoint | None = None,
        metadata: Mapping[str, Any] | None = None,
        checkpoint: Checkpoint | None = None,
-        select: list[ThreadStateSelectField] | None = None,
        headers: Mapping[str, str] | None = None,
        params: QueryParamTypes | None = None,
    ) -> list[ThreadState]:
@@ -725,9 +703,6 @@ class ThreadsClient:
            limit: The maximum number of states to return.
            before: Return states before this checkpoint.
            metadata: Filter states by metadata key-value pairs.
-            select: Fields to include in the response. Use `values.<key>` to
-                return a single state key (e.g. `values.messages`), which lets the
-                server skip loading the rest of the state. Defaults to all fields.
            headers: Optional custom headers to include with the request.
            params: Optional query parameters to include with the request.

@@ -754,8 +729,6 @@ class ThreadsClient:
            payload["metadata"] = metadata
        if checkpoint:
            payload["checkpoint"] = checkpoint
-        if select:
-            payload["select"] = select
        return await self.http.post(
            f"/threads/{_quote_path_param(thread_id)}/history",
            json=payload,
@@ -9,7 +9,7 @@ import re
 from collections.abc import Mapping
 from datetime import tzinfo
 from typing import TYPE_CHECKING, Any, cast
-from urllib.parse import quote, urlparse, urlsplit, urlunsplit
+from urllib.parse import quote, urlparse

 import httpx

@@ -195,25 +195,6 @@ def _validate_reconnect_location(base_url: httpx.URL, location: str) -> str:
    return location


-_RUN_STREAM_PATH = re.compile(r"(.*/threads/[^/]+/runs/[^/]+)/stream")
-
-
-def _run_url_from_stream_location(location: str) -> str | None:
-    url = urlsplit(location)
-    if match := _RUN_STREAM_PATH.fullmatch(url.path):
-        return urlunsplit((url.scheme, url.netloc, match[1], "", ""))
-    return None
-
-
-def _run_check_headers(reconnect_headers: Mapping[str, str]) -> dict[str, str]:
-    headers = {
-        key: value
-        for key, value in reconnect_headers.items()
-        if key.lower() not in ("accept", "last-event-id")
-    }
-    return {**headers, "Accept": "application/json"}
-
-
 def _reconnect_delay(attempt: int, *, base: float, cap: float) -> float:
    """Seconds to wait before reconnect attempt `attempt` (0-based).

@@ -15,8 +15,6 @@ import orjson
 from langgraph_sdk._shared.utilities import (
    _orjson_default,
    _reconnect_delay,
-    _run_check_headers,
-    _run_url_from_stream_location,
    _validate_reconnect_location,
 )
 from langgraph_sdk.errors import (
@@ -237,7 +235,6 @@ class SyncHttpClient:
        reconnect_path: str | None = None
        reconnect_attempts = 0
        max_reconnect_attempts = 5
-        run_ended = False

        while True:
            current_headers = dict(
@@ -306,7 +303,6 @@ class SyncHttpClient:
                                    # Progress since the last drop earns a fresh
                                    # set of reconnect attempts.
                                    reconnect_attempts = 0
-                                    run_ended |= sse.event in ("end", "error")
                                    yield sse
                    except httpx.HTTPError as err:
                        # httpx.TransportError inherits from HTTPError, so transient
@@ -321,7 +317,6 @@ class SyncHttpClient:
                            if sse.event or decoder.has_data:
                                # See async stream implementation for rationale on
                                # skipping empty flush events.
-                                run_ended |= sse.event in ("end", "error")
                                yield sse
            except (httpx.TransportError, RateLimitError, InternalServerError) as err:
                # A reconnect that can't open (connection refused, 429, 5xx or a
@@ -331,13 +326,6 @@ class SyncHttpClient:
                if reconnect_path is None:
                    raise
                reconnect_cause = err
-            # A run's stream closes cleanly both when the run ends and when a
-            # proxy timeout or a server restart cuts it. Without an `end` or
-            # `error` event the two look the same, so ask the run.
-            if reconnect_cause is None and reconnect_path is not None and not run_ended:
-                reconnect_cause = _check_run(
-                    self.client, reconnect_path, reconnect_headers
-                )
            if reconnect_cause is not None:
                reconnect_attempts += 1
                if reconnect_attempts > max_reconnect_attempts:
@@ -366,28 +354,3 @@ def _encode_json(json: Any) -> tuple[dict[str, str], bytes | None]:
 def _decode_json(r: httpx.Response) -> Any:
    body = r.read()
    return orjson.loads(body) if body else None
-
-
-def _check_run(
-    client: httpx.Client, stream_location: str, headers: Mapping[str, str]
-) -> httpx.HTTPError | None:
-    run_url = _run_url_from_stream_location(stream_location)
-    if run_url is None:
-        return None
-    try:
-        r = client.get(run_url, headers=_run_check_headers(headers))
-        if r.status_code == 429 or r.status_code >= 500:
-            _raise_for_status_typed(r)
-        status = _decode_json(r)["status"] if r.is_success else None
-    except (httpx.TransportError, RateLimitError, InternalServerError) as err:
-        # The restart that closed the stream can fail the check too, so retry
-        # it like a drop.
-        return err
-    except Exception:
-        # Anything else must not turn a normal end of stream into an error.
-        return None
-    if status in ("pending", "running"):
-        return httpx.TransportError(
-            "Stream closed while the run was still pending or running"
-        )
-    return None
@@ -21,7 +21,6 @@ from langgraph_sdk.schema import (
    ThreadSelectField,
    ThreadSortBy,
    ThreadState,
-    ThreadStateSelectField,
    ThreadStatus,
    ThreadStreamMode,
    ThreadUpdateStateResponse,
@@ -481,7 +480,6 @@ class SyncThreadsClient:
        checkpoint_id: str | None = None,  # deprecated
        *,
        subgraphs: bool = False,
-        select: list[ThreadStateSelectField] | None = None,
        headers: Mapping[str, str] | None = None,
        params: QueryParamTypes | None = None,
    ) -> ThreadState:
@@ -491,9 +489,6 @@ class SyncThreadsClient:
            thread_id: The ID of the thread to get the state of.
            checkpoint: The checkpoint to get the state of.
            subgraphs: Include subgraphs states.
-            select: Fields to include in the response. Use `values.<key>` to
-                return a single state key (e.g. `values.messages`), which lets the
-                server skip loading the rest of the state. Defaults to all fields.
            headers: Optional custom headers to include with the request.

        Returns:
@@ -586,29 +581,16 @@ class SyncThreadsClient:
            }
            ```

-            Fetch only the `messages` state key:
-
-            ```python
-            thread_state = client.threads.get_state(
-                thread_id="my_thread_id",
-                select=["values.messages"],
-            )
-            ```
        """
        if checkpoint:
-            payload: dict[str, Any] = {"checkpoint": checkpoint, "subgraphs": subgraphs}
-            if select:
-                payload["select"] = select
            return self.http.post(
                f"/threads/{_quote_path_param(thread_id)}/state/checkpoint",
-                json=payload,
+                json={"checkpoint": checkpoint, "subgraphs": subgraphs},
                headers=headers,
                params=params,
            )
        elif checkpoint_id:
-            get_params: dict[str, Any] = {"subgraphs": subgraphs}
-            if select:
-                get_params["select"] = select
+            get_params = {"subgraphs": subgraphs}
            if params:
                get_params = {**get_params, **dict(params)}
            return self.http.get(
@@ -617,9 +599,7 @@ class SyncThreadsClient:
                headers=headers,
            )
        else:
-            get_params: dict[str, Any] = {"subgraphs": subgraphs}
-            if select:
-                get_params["select"] = select
+            get_params = {"subgraphs": subgraphs}
            if params:
                get_params = {**get_params, **dict(params)}
            return self.http.get(
@@ -699,7 +679,6 @@ class SyncThreadsClient:
        before: str | Checkpoint | None = None,
        metadata: Mapping[str, Any] | None = None,
        checkpoint: Checkpoint | None = None,
-        select: list[ThreadStateSelectField] | None = None,
        headers: Mapping[str, str] | None = None,
        params: QueryParamTypes | None = None,
    ) -> list[ThreadState]:
@@ -711,9 +690,6 @@ class SyncThreadsClient:
            limit: The maximum number of states to return.
            before: Return states before this checkpoint.
            metadata: Filter states by metadata key-value pairs.
-            select: Fields to include in the response. Use `values.<key>` to
-                return a single state key (e.g. `values.messages`), which lets the
-                server skip loading the rest of the state. Defaults to all fields.
            headers: Optional custom headers to include with the request.

        Returns:
@@ -741,8 +717,6 @@ class SyncThreadsClient:
            payload["metadata"] = metadata
        if checkpoint:
            payload["checkpoint"] = checkpoint
-        if select:
-            payload["select"] = select
        return self.http.post(
            f"/threads/{_quote_path_param(thread_id)}/history",
            json=payload,
@@ -102,7 +102,7 @@ class Priority:
        @priority.assign
        async def assign(ctx: PriorityContext) -> PrioritySettings | None:
            return {
-                "priority": -3 if "premium" in ctx.permissions else 0,
+                "priority": 3 if "premium" in ctx.permissions else 0,
                # Stored unencrypted, so an opaque ID rather than personal data.
                "fairness_group": ctx.user["org_id"],
            }
@@ -134,7 +134,7 @@ class Priority:
            @priority.assign
            async def assign(ctx: PriorityContext) -> PrioritySettings | None:
                if ctx.cron_id is not None:
-                    return {"priority": 2}
+                    return {"priority": -2}
                return None
            ```

@@ -50,20 +50,18 @@ class PrioritySettings(typing.TypedDict, total=False):

    Every key is optional: a missing key or a key set to `None` takes its
    default, and returning `None` instead of a dict gives every key its default.
-    A `priority` outside -5 to 5, or a `fairness_group` longer than 256
-    characters, is an error.
+    A value outside its range, or an empty `fairness_group`, is an error.
    """

    priority: int | None
-    """An integer from -5 to 5, where -5 runs first and 5 runs last. Defaults to 0."""
+    """An integer from -5 to 5, where 5 runs first and -5 runs last. Defaults to 0."""

    fairness_group: str | None
-    """Currently disabled.
-    The thread's fairness group, a string of at most 256 characters.
-
-    Defaults to `"default"`, as does an empty string. It has no effect on run
-    order for now.
+    """The thread's fairness group, a non-empty string. Defaults to `"default"`.

    The server stores it unencrypted, even when the deployment uses custom
    encryption, so use an opaque ID rather than personal data.
    """
+
+    fairness_weight: int | None
+    """The weight of the thread's fairness group, an integer from 1 to 100. Defaults to 1."""
@@ -480,21 +480,6 @@ ThreadSelectField = Literal[
    "interrupts",
 ]

-ThreadStateSelectField = (
-    Literal[
-        "values",
-        "next",
-        "tasks",
-        "checkpoint",
-        "metadata",
-        "created_at",
-        "parent_checkpoint",
-        "interrupts",
-    ]
-    | str
-)
-"""Also accepts `values.<key>` for a single state key, e.g. `values.messages`."""
-
 RunSelectField = Literal[
    "run_id",
    "thread_id",
@@ -651,18 +651,16 @@ def _long_stream_steps(stream_cls, drops):
    return steps


-def _run_sync(steps, headers=None):
+def _run_sync(steps):
    handler, seen = _scripted(steps)
    with httpx.Client(
        transport=httpx.MockTransport(handler), base_url="https://example.com"
    ) as client:
-        parts = list(
-            SyncHttpClient(client).stream("/stream", "POST", json={}, headers=headers)
-        )
+        parts = list(SyncHttpClient(client).stream("/stream", "POST", json={}))
    return parts, seen


-async def _run_async(steps, headers=None):
+async def _run_async(steps):
    sync_handler, seen = _scripted(steps)

    async def handler(request):
@@ -671,12 +669,7 @@ async def _run_async(steps, headers=None):
    async with httpx.AsyncClient(
        transport=httpx.MockTransport(handler), base_url="https://example.com"
    ) as client:
-        parts = [
-            p
-            async for p in HttpClient(client).stream(
-                "/stream", "POST", json={}, headers=headers
-            )
-        ]
+        parts = [p async for p in HttpClient(client).stream("/stream", "POST", json={})]
    return parts, seen


@@ -851,254 +844,6 @@ async def test_async_reconnect_backs_off(no_sleep):
    assert len(no_sleep) == 2 and all(d > 0 for d in no_sleep)


-# --- a run stream that closes cleanly before the run ends ---
-
-RUN_STREAM = "/threads/t1/runs/r1/stream"
-RUN = "/threads/t1/runs/r1"
-END = b"event: end\ndata: null\n\n"
-
-Step = Callable[[httpx.Request], httpx.Response]
-
-
-def _run_status(status: str) -> Step:
-    return lambda request: httpx.Response(200, json={"status": status}, request=request)
-
-
-def _clean_close_steps(stream_cls: type, closes: int, check: Step) -> list[Step]:
-    steps = [_ok(stream_cls, [_event(0)], location=RUN_STREAM)]
-    for i in range(1, closes + 1):
-        steps += [check, _ok(stream_cls, [_event(i)])]
-    return [*steps, _run_status("success")]
-
-
-def _stalled_steps(stream_cls: type) -> list[Step]:
-    return [
-        _ok(stream_cls, [_event(1)], location=RUN_STREAM),
-        *[_run_status("running"), _ok(stream_cls, [])] * 5,
-        _run_status("running"),
-    ]
-
-
-def _requests(seen: list[httpx.Request]) -> list[tuple[str, str, str | None]]:
-    return [(r.method, r.url.path, r.headers.get("last-event-id")) for r in seen]
-
-
-RESUMED = [
-    ("POST", "/stream", None),
-    ("GET", RUN, None),
-    ("GET", RUN_STREAM, "0"),
-    ("GET", RUN, None),
-]
-
-
-CHECKS_THAT_RECONNECT = {
-    "pending": _run_status("pending"),
-    "running": _run_status("running"),
-    "429": _status(429),
-    "503": _status(503),
-    "connect_error": _connect_error,
-}
-
-
-@pytest.mark.parametrize(
-    "check", CHECKS_THAT_RECONNECT.values(), ids=CHECKS_THAT_RECONNECT.keys()
-)
-def test_sync_clean_close_reconnects_after_check(check: Step, no_sleep: list[float]):
-    parts, seen = _run_sync(_clean_close_steps(ListByteStream, 1, check))
-    assert [p.data for p in parts] == [0, 1]
-    assert _requests(seen) == RESUMED
-    assert len(no_sleep) == 1
-
-
-@pytest.mark.parametrize(
-    "check", CHECKS_THAT_RECONNECT.values(), ids=CHECKS_THAT_RECONNECT.keys()
-)
-async def test_async_clean_close_reconnects_after_check(
-    check: Step, no_sleep: list[float]
-):
-    parts, seen = await _run_async(_clean_close_steps(AsyncListByteStream, 1, check))
-    assert [p.data for p in parts] == [0, 1]
-    assert _requests(seen) == RESUMED
-    assert len(no_sleep) == 1
-
-
-@pytest.mark.usefixtures("no_sleep")
-def test_sync_clean_closes_with_progress_do_not_run_out_of_attempts():
-    parts, _ = _run_sync(_clean_close_steps(ListByteStream, 6, _run_status("running")))
-    assert [p.data for p in parts] == [0, 1, 2, 3, 4, 5, 6]
-
-
-@pytest.mark.usefixtures("no_sleep")
-async def test_async_clean_closes_with_progress_do_not_run_out_of_attempts():
-    parts, _ = await _run_async(
-        _clean_close_steps(AsyncListByteStream, 6, _run_status("running"))
-    )
-    assert [p.data for p in parts] == [0, 1, 2, 3, 4, 5, 6]
-
-
-CHECKS_THAT_END = {
-    "success": _run_status("success"),
-    "error": _run_status("error"),
-    "timeout": _run_status("timeout"),
-    "interrupted": _run_status("interrupted"),
-    "403": _status(403),
-    "404": _status(404),
-    "not_json": _not_sse,
-    "json_without_status": lambda request: httpx.Response(
-        200, json={}, request=request
-    ),
-}
-CHECKED = [("POST", "/stream", None), ("GET", RUN, None)]
-
-
-@pytest.mark.usefixtures("no_sleep")
-@pytest.mark.parametrize("check", CHECKS_THAT_END.values(), ids=CHECKS_THAT_END.keys())
-def test_sync_clean_close_ends_the_stream_after_check(check: Step):
-    parts, seen = _run_sync(
-        [_ok(ListByteStream, [_event(1)], location=RUN_STREAM), check]
-    )
-    assert [p.data for p in parts] == [1]
-    assert _requests(seen) == CHECKED
-
-
-@pytest.mark.usefixtures("no_sleep")
-@pytest.mark.parametrize("check", CHECKS_THAT_END.values(), ids=CHECKS_THAT_END.keys())
-async def test_async_clean_close_ends_the_stream_after_check(check: Step):
-    parts, seen = await _run_async(
-        [_ok(AsyncListByteStream, [_event(1)], location=RUN_STREAM), check]
-    )
-    assert [p.data for p in parts] == [1]
-    assert _requests(seen) == CHECKED
-
-
-NO_CHECK = {
-    "end": lambda s: [_ok(s, [_event(1), END], location=RUN_STREAM)],
-    "error": lambda s: [
-        _ok(s, [_event(1), b"event: error\ndata: {}\n\n"], location=RUN_STREAM)
-    ],
-    "unterminated_end": lambda s: [
-        _ok(s, [_event(1), b"event: end\ndata: null\n"], location=RUN_STREAM)
-    ],
-    "end_on_an_earlier_connection": lambda s: [
-        _ok(s, [_event(1), END], drop=True, location=RUN_STREAM),
-        _ok(s, []),
-    ],
-    "thread_stream": lambda s: [_ok(s, [_event(1)], location="/threads/t1/stream")],
-    "threadless_run_location": lambda s: [
-        _ok(s, [_event(1)], location="/runs/r1/stream")
-    ],
-}
-
-
-@pytest.mark.usefixtures("no_sleep")
-@pytest.mark.parametrize("steps", NO_CHECK.values(), ids=NO_CHECK.keys())
-def test_sync_stream_ends_without_a_run_check(steps: Callable[[type], list[Step]]):
-    _, seen = _run_sync(steps(ListByteStream))
-    assert [r.url.path for r in seen if not r.url.path.endswith("/stream")] == []
-
-
-@pytest.mark.usefixtures("no_sleep")
-@pytest.mark.parametrize("steps", NO_CHECK.values(), ids=NO_CHECK.keys())
-async def test_async_stream_ends_without_a_run_check(
-    steps: Callable[[type], list[Step]],
-):
-    _, seen = await _run_async(steps(AsyncListByteStream))
-    assert [r.url.path for r in seen if not r.url.path.endswith("/stream")] == []
-
-
-def test_sync_clean_closes_without_progress_give_up_after_five_attempts(
-    no_sleep: list[float],
-):
-    with pytest.raises(httpx.TransportError, match=GIVE_UP) as exc_info:
-        _run_sync(_stalled_steps(ListByteStream))
-    assert "still pending or running" in str(exc_info.value.__cause__)
-    _assert_backed_off_for_about_20s(no_sleep)
-
-
-async def test_async_clean_closes_without_progress_give_up_after_five_attempts(
-    no_sleep: list[float],
-):
-    with pytest.raises(httpx.TransportError, match=GIVE_UP) as exc_info:
-        await _run_async(_stalled_steps(AsyncListByteStream))
-    assert "still pending or running" in str(exc_info.value.__cause__)
-    _assert_backed_off_for_about_20s(no_sleep)
-
-
-CHECK_URLS = {
-    "path": ("/threads/t1/runs/r1/stream", "https://example.com/threads/t1/runs/r1"),
-    "prefix_and_query": (
-        "/api/threads/t1/runs/r1/stream?stream_mode=values",
-        "https://example.com/api/threads/t1/runs/r1",
-    ),
-    "absolute": (
-        "https://example.com/threads/t1/runs/r1/stream",
-        "https://example.com/threads/t1/runs/r1",
-    ),
-}
-
-
-@pytest.mark.usefixtures("no_sleep")
-@pytest.mark.parametrize(
-    ("location", "url"), CHECK_URLS.values(), ids=CHECK_URLS.keys()
-)
-def test_sync_run_check_gets_the_run_behind_the_stream_location(
-    location: str, url: str
-):
-    _, seen = _run_sync(
-        [_ok(ListByteStream, [_event(1)], location=location), _run_status("success")]
-    )
-    assert str(seen[-1].url) == url
-
-
-@pytest.mark.usefixtures("no_sleep")
-@pytest.mark.parametrize(
-    ("location", "url"), CHECK_URLS.values(), ids=CHECK_URLS.keys()
-)
-async def test_async_run_check_gets_the_run_behind_the_stream_location(
-    location: str, url: str
-):
-    _, seen = await _run_async(
-        [
-            _ok(AsyncListByteStream, [_event(1)], location=location),
-            _run_status("success"),
-        ]
-    )
-    assert str(seen[-1].url) == url
-
-
-CALLER_HEADERS = {"Authorization": "Bearer token", "Last-Event-ID": "0"}
-BODY_AND_CURSOR_HEADERS = {"content-type", "content-length", "last-event-id"}
-
-
-def _assert_run_check_headers(seen: list[httpx.Request]) -> None:
-    check = seen[-1]
-    assert check.url.path == RUN
-    assert check.headers["authorization"] == "Bearer token"
-    assert check.headers["accept"] == "application/json"
-    assert check.headers.keys() & BODY_AND_CURSOR_HEADERS == set()
-
-
-@pytest.mark.usefixtures("no_sleep")
-def test_sync_run_check_sends_caller_headers_and_accepts_json_without_body_or_cursor():
-    _, seen = _run_sync(
-        [_ok(ListByteStream, [_event(1)], location=RUN_STREAM), _run_status("success")],
-        headers=CALLER_HEADERS,
-    )
-    _assert_run_check_headers(seen)
-
-
-@pytest.mark.usefixtures("no_sleep")
-async def test_async_run_check_sends_caller_headers_and_accepts_json_without_body_or_cursor():
-    _, seen = await _run_async(
-        [
-            _ok(AsyncListByteStream, [_event(1)], location=RUN_STREAM),
-            _run_status("success"),
-        ],
-        headers=CALLER_HEADERS,
-    )
-    _assert_run_check_headers(seen)
-
-
 # --- _sse_to_v2_dict conversion ---


@@ -120,5 +120,9 @@ def test_context_is_frozen():


 def test_every_settings_key_is_optional():
-    assert PrioritySettings.__optional_keys__ == {"priority", "fairness_group"}
+    assert PrioritySettings.__optional_keys__ == {
+        "priority",
+        "fairness_group",
+        "fairness_weight",
+    }
    assert PrioritySettings.__required_keys__ == frozenset()
@@ -11,14 +11,6 @@ from langgraph_sdk.client import (
    SyncThreadsClient,
    ThreadsClient,
 )
-from langgraph_sdk.schema import Checkpoint
-
-CHECKPOINT: Checkpoint = {
-    "thread_id": "thread_123",
-    "checkpoint_ns": "",
-    "checkpoint_id": "cp_1",
-    "checkpoint_map": None,
-}


@pytest.mark.asyncio
@@ -64,121 +56,3 @@ def test_sync_threads_update_return_minimal():
        )

    assert result is None
-
-
-@pytest.mark.asyncio
-async def test_async_threads_get_state_select():
-    requests: list[httpx.Request] = []
-
-    async def handler(request: httpx.Request) -> httpx.Response:
-        requests.append(request)
-        return httpx.Response(200, json={})
-
-    transport = httpx.MockTransport(handler)
-    async with httpx.AsyncClient(
-        transport=transport, base_url="https://example.com"
-    ) as client:
-        threads_client = ThreadsClient(HttpClient(client))
-        await threads_client.get_state("thread_123", select=["values.messages", "next"])
-        await threads_client.get_state(
-            "thread_123", checkpoint_id="cp_1", select=["values.messages"]
-        )
-        await threads_client.get_state(
-            "thread_123",
-            checkpoint=CHECKPOINT,
-            select=["values.messages"],
-        )
-        await threads_client.get_state("thread_123")
-
-    latest, by_id, by_checkpoint, default = requests
-    assert latest.method == "GET"
-    assert latest.url.path == "/threads/thread_123/state"
-    assert latest.url.params.get_list("select") == ["values.messages", "next"]
-    assert by_id.method == "GET"
-    assert by_id.url.path == "/threads/thread_123/state/cp_1"
-    assert by_id.url.params.get_list("select") == ["values.messages"]
-    assert by_checkpoint.method == "POST"
-    assert by_checkpoint.url.path == "/threads/thread_123/state/checkpoint"
-    assert json.loads(by_checkpoint.content) == {
-        "checkpoint": CHECKPOINT,
-        "subgraphs": False,
-        "select": ["values.messages"],
-    }
-    assert "select" not in default.url.params
-
-
-@pytest.mark.asyncio
-async def test_async_threads_get_history_select():
-    bodies: list[dict] = []
-
-    async def handler(request: httpx.Request) -> httpx.Response:
-        assert request.method == "POST"
-        assert request.url.path == "/threads/thread_123/history"
-        bodies.append(json.loads(request.content))
-        return httpx.Response(200, json=[])
-
-    transport = httpx.MockTransport(handler)
-    async with httpx.AsyncClient(
-        transport=transport, base_url="https://example.com"
-    ) as client:
-        threads_client = ThreadsClient(HttpClient(client))
-        await threads_client.get_history("thread_123", select=["values.messages"])
-        await threads_client.get_history("thread_123")
-
-    assert bodies == [{"limit": 10, "select": ["values.messages"]}, {"limit": 10}]
-
-
-def test_sync_threads_get_state_select():
-    requests: list[httpx.Request] = []
-
-    def handler(request: httpx.Request) -> httpx.Response:
-        requests.append(request)
-        return httpx.Response(200, json={})
-
-    transport = httpx.MockTransport(handler)
-    with httpx.Client(transport=transport, base_url="https://example.com") as client:
-        threads_client = SyncThreadsClient(SyncHttpClient(client))
-        threads_client.get_state("thread_123", select=["values.messages", "next"])
-        threads_client.get_state(
-            "thread_123", checkpoint_id="cp_1", select=["values.messages"]
-        )
-        threads_client.get_state(
-            "thread_123",
-            checkpoint=CHECKPOINT,
-            select=["values.messages"],
-        )
-        threads_client.get_state("thread_123")
-
-    latest, by_id, by_checkpoint, default = requests
-    assert latest.method == "GET"
-    assert latest.url.path == "/threads/thread_123/state"
-    assert latest.url.params.get_list("select") == ["values.messages", "next"]
-    assert by_id.method == "GET"
-    assert by_id.url.path == "/threads/thread_123/state/cp_1"
-    assert by_id.url.params.get_list("select") == ["values.messages"]
-    assert by_checkpoint.method == "POST"
-    assert by_checkpoint.url.path == "/threads/thread_123/state/checkpoint"
-    assert json.loads(by_checkpoint.content) == {
-        "checkpoint": CHECKPOINT,
-        "subgraphs": False,
-        "select": ["values.messages"],
-    }
-    assert "select" not in default.url.params
-
-
-def test_sync_threads_get_history_select():
-    bodies: list[dict] = []
-
-    def handler(request: httpx.Request) -> httpx.Response:
-        assert request.method == "POST"
-        assert request.url.path == "/threads/thread_123/history"
-        bodies.append(json.loads(request.content))
-        return httpx.Response(200, json=[])
-
-    transport = httpx.MockTransport(handler)
-    with httpx.Client(transport=transport, base_url="https://example.com") as client:
-        threads_client = SyncThreadsClient(SyncHttpClient(client))
-        threads_client.get_history("thread_123", select=["values.messages"])
-        threads_client.get_history("thread_123")
-
-    assert bodies == [{"limit": 10, "select": ["values.messages"]}, {"limit": 10}]