fix(langgraph): keep the recursion budget and skip Send tasks when applying inserted input

AGENTS.md

@@ -24,39 +24,6 @@ TEST=path/to/test.py make test
 
 Other pytest arguments can also be supplied inside the `TEST` variable.
 
-## Direction: LangGraph is a runtime
-
-LangGraph is consolidating as the low-level runtime for agents and workflows:
-graph execution, checkpointing, streaming, and interrupt/resume. Critical
-production systems and agent harnesses run on it, so correctness and stability
-come first. It is moving away from being a friendly SDK for building agents
-directly; agent development belongs one layer up, on a harness — Deep Agents
-(github.com/langchain-ai/deepagents, a separate repo) is the recommended one.
-
-Optimize contributions for runtime correctness, reliability, performance, and
-simplicity — not for the shortest agent example.
-
-- One way to do each thing. A change never adds a way; removals are always
-  deliberate (see below). The number of ways only goes down. No aliases,
-  overloads, extra accepted types, implicit defaults, or customization hooks
-  for convenience: ergonomics alone never justify new public surface.
-- The mandate applies to everything that implements runtime behavior, in
-  whichever repo it lives: the graph engine (`langgraph`, `langgraph-core`),
-  the checkpointers (`checkpoint*`), and the server (`langgraph-api`). The
-  client SDKs and CLI stay ergonomic but are thin, faithful clients, never a
-  second implementation of runtime behavior.
-- Agent-level packages (`prebuilt`, `langgraph-supervisor`, `langgraph-swarm`,
-  `langgraph-cua`) are maintenance-only: fix bugs, don't add agent features.
-  New examples and docs that build agents should use Deep Agents.
-- Remove deliberately, not opportunistically. Removing or changing public
-  behavior must be the stated purpose of the PR and go through the deprecation
-  process — replacement in place, removal version recorded, migration note.
-  Never drop a default or overload as a side effect of an unrelated change.
-- Behavior changes land in Python and JS together (the implementations live in
-  separate repos; note in the PR when the other one needs a matching change).
-- If a task asks for something this section rules out, say so and propose the
-  runtime-level or harness-level alternative instead of quietly implementing it.
-
 ## Libraries
 
 The repository contains several Python and JavaScript/TypeScript libraries.

libs/checkpoint-conformance/uv.lock

@@ -36,11 +36,11 @@ wheels = [
 
 [[package]]
 name = "certifi"
-version = "2026.10.19"
+version = "2026.4.22"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/a6/bd/1436c50cc46699de0230fbaacc1d1de7bfec413176099949e9d5112e88f2/certifi-2026.10.19.tar.gz", hash = "sha256:035c1e85572b141bf1c3a3eff0e33a8eb74917522f2559075ff8d2fea780a1ae", size = 137598, upload-time = "2026-10-20T02:24:16.604Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/25/ee/6caf7a40c36a1220410afe15a1cc64993a1f864871f698c0f93acb72842a/certifi-2026.4.22.tar.gz", hash = "sha256:8d455352a37b71bf76a79caa83a3d6c25afee4a385d632127b6afb3963f1c580", size = 137077, upload-time = "2026-04-22T11:26:11.191Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c4/51/29046e48f693c54e5b7412216d447a1d8362c9653148d98c02cdf65fa733/certifi-2026.10.19-py3-none-any.whl", hash = "sha256:42d35340cc5b9ba78e818ddbff0c5b1c2b779de448a340fd1b989f5fa8670e1b", size = 136464, upload-time = "2026-10-20T02:24:15.072Z" },
+    { url = "https://files.pythonhosted.org/packages/22/30/7cd8fdcdfbc5b869528b079bfb76dcdf6056b1a2097a662e5e8c04f42965/certifi-2026.4.22-py3-none-any.whl", hash = "sha256:3cb2210c8f88ba2318d29b0388d1023c8492ff72ecdde4ebdaddbb13a31b1c4a", size = 135707, upload-time = "2026-04-22T11:26:09.372Z" },
 ]
 
 [[package]]
@@ -279,7 +279,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.3.1"
+version = "4.3.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },

libs/checkpoint-postgres/langgraph/checkpoint/postgres/__init__.py

@@ -27,15 +27,10 @@ from psycopg_pool import ConnectionPool
 from langgraph.checkpoint.postgres import _internal
 from langgraph.checkpoint.postgres.base import (
     _DELTA_PAGE_SIZE,
-    PRUNE_DELETE_THREADS_SQL,
-    PRUNE_STRATEGIES,
     BasePostgresSaver,
     _build_delta_stage1_sql,
     _build_delta_stage2_sql,
     _DeltaStage2Row,
-    _execute,
-    _keep_latest,
-    _refuse_delta_threads,
 )
 from langgraph.checkpoint.postgres.shallow import ShallowPostgresSaver
 
@@ -406,73 +401,6 @@ class PostgresSaver(BasePostgresSaver):
                 (str(thread_id),),
             )
 
-    def prune(
-        self,
-        thread_ids: Sequence[str],
-        *,
-        strategy: str = "keep_latest",
-    ) -> None:
-        """Prune checkpoints for the given threads.
-
-        `"delete"` removes every checkpoint, write and blob of the threads, in
-        one transaction.
-
-        `"keep_latest"` keeps the latest checkpoint of each namespace (the one
-        `get_tuple` loads, plus its parent when it predates v4 and has pending
-        sends), with its pending writes and the blobs it references, and
-        deletes the rest. A kept checkpoint whose parent it deletes is left with
-        no parent. A subgraph call's namespace is deleted with the root
-        checkpoint the call started from, except a `checkpointer=True`
-        subgraph's, which keeps its latest checkpoint. Each thread is pruned in
-        its own transaction, on one snapshot of it, so a run appending to the
-        thread meanwhile is safe; forking or replaying from a checkpoint being
-        deleted is not. A thread that fails because another transaction changed
-        it leaves the threads before it pruned, and retrying is safe.
-
-        `"keep_latest"` refuses threads that use a `DeltaChannel`, since it
-        rebuilds the latest value from older checkpoints: if any requested
-        thread does, nothing is pruned. A thread that starts using one before
-        its turn in the batch is refused then, after the threads before it.
-
-        Args:
-            thread_ids: The thread IDs to prune.
-            strategy: `"keep_latest"` or `"delete"`.
-
-        Raises:
-            TypeError: If `thread_ids` is a single string.
-            ValueError: If `strategy` is unknown.
-            NotImplementedError: If `strategy` is `"keep_latest"` and a thread
-                uses a `DeltaChannel`.
-            psycopg.errors.SerializationFailure: If another transaction, such
-                as a second prune, changes a thread's rows while `"keep_latest"`
-                prunes it.
-            psycopg.errors.DeadlockDetected: If a second prune of a thread runs
-                at the same time.
-        """
-        if isinstance(thread_ids, str):
-            raise TypeError("thread_ids must be a sequence of thread IDs, not a str")
-        if strategy not in PRUNE_STRATEGIES:
-            raise ValueError(f"Unknown prune strategy: {strategy!r}")
-        thread_ids = [str(t) for t in thread_ids]
-        if not thread_ids:
-            return
-        if strategy == "delete":
-            with self._cursor() as cur, cur.connection.transaction():
-                for sql in PRUNE_DELETE_THREADS_SQL:
-                    cur.execute(sql, (thread_ids,))
-            return
-        with self._cursor() as cur:
-            _execute(cur, _refuse_delta_threads(thread_ids))
-        for thread_id in thread_ids:
-            with self._cursor() as cur:
-                if self.pipe:
-                    # The transaction has to start with its isolation level, and
-                    # in pipeline mode it would take in what ran since the last
-                    # sync.
-                    self.pipe.sync()
-                with cur.connection.transaction():
-                    _execute(cur, _keep_latest(thread_id))
-
     @contextmanager
     def _cursor(self, *, pipeline: bool = False) -> Iterator[Cursor[DictRow]]:
         """Create a database cursor as a context manager.

libs/checkpoint-postgres/langgraph/checkpoint/postgres/aio.py

@@ -27,15 +27,10 @@ from psycopg_pool import AsyncConnectionPool
 from langgraph.checkpoint.postgres import _ainternal
 from langgraph.checkpoint.postgres.base import (
     _DELTA_PAGE_SIZE,
-    PRUNE_DELETE_THREADS_SQL,
-    PRUNE_STRATEGIES,
     BasePostgresSaver,
-    _aexecute,
     _build_delta_stage1_sql,
     _build_delta_stage2_sql,
     _DeltaStage2Row,
-    _keep_latest,
-    _refuse_delta_threads,
 )
 from langgraph.checkpoint.postgres.shallow import AsyncShallowPostgresSaver
 
@@ -365,55 +360,6 @@ class AsyncPostgresSaver(BasePostgresSaver):
                 (str(thread_id),),
             )
 
-    async def aprune(
-        self,
-        thread_ids: Sequence[str],
-        *,
-        strategy: str = "keep_latest",
-    ) -> None:
-        """Prune checkpoints for the given threads.
-
-        See `PostgresSaver.prune` for what each strategy keeps.
-
-        Args:
-            thread_ids: The thread IDs to prune.
-            strategy: `"keep_latest"` or `"delete"`.
-
-        Raises:
-            TypeError: If `thread_ids` is a single string.
-            ValueError: If `strategy` is unknown.
-            NotImplementedError: If `strategy` is `"keep_latest"` and a thread
-                uses a `DeltaChannel`.
-            psycopg.errors.SerializationFailure: If another transaction, such
-                as a second prune, changes a thread's rows while `"keep_latest"`
-                prunes it.
-            psycopg.errors.DeadlockDetected: If a second prune of a thread runs
-                at the same time.
-        """
-        if isinstance(thread_ids, str):
-            raise TypeError("thread_ids must be a sequence of thread IDs, not a str")
-        if strategy not in PRUNE_STRATEGIES:
-            raise ValueError(f"Unknown prune strategy: {strategy!r}")
-        thread_ids = [str(t) for t in thread_ids]
-        if not thread_ids:
-            return
-        if strategy == "delete":
-            async with self._cursor() as cur, cur.connection.transaction():
-                for sql in PRUNE_DELETE_THREADS_SQL:
-                    await cur.execute(sql, (thread_ids,))
-            return
-        async with self._cursor() as cur:
-            await _aexecute(cur, _refuse_delta_threads(thread_ids))
-        for thread_id in thread_ids:
-            async with self._cursor() as cur:
-                if self.pipe:
-                    # The transaction has to start with its isolation level, and
-                    # in pipeline mode it would take in what ran since the last
-                    # sync.
-                    await self.pipe.sync()
-                async with cur.connection.transaction():
-                    await _aexecute(cur, _keep_latest(thread_id))
-
     @asynccontextmanager
     async def _cursor(
         self, *, pipeline: bool = False
@@ -742,33 +688,6 @@ class AsyncPostgresSaver(BasePostgresSaver):
             self.adelete_thread(thread_id), self.loop
         ).result()
 
-    def prune(
-        self,
-        thread_ids: Sequence[str],
-        *,
-        strategy: str = "keep_latest",
-    ) -> None:
-        """Prune checkpoints for the given threads.
-
-        See `PostgresSaver.prune` for what each strategy keeps.
-
-        Args:
-            thread_ids: The thread IDs to prune.
-            strategy: `"keep_latest"` or `"delete"`.
-        """
-        try:
-            if asyncio.get_running_loop() is self.loop:
-                raise asyncio.InvalidStateError(
-                    "Synchronous calls to AsyncPostgresSaver are only allowed from a "
-                    "different thread. From the main thread, use the async interface. "
-                    "For example, use `await checkpointer.aprune(...)`."
-                )
-        except RuntimeError:
-            pass
-        return asyncio.run_coroutine_threadsafe(
-            self.aprune(thread_ids, strategy=strategy), self.loop
-        ).result()
-
     def get_delta_channel_history(
         self, *, config: RunnableConfig, channels: Sequence[str]
     ) -> Mapping[str, DeltaChannelHistory]:

libs/checkpoint-postgres/langgraph/checkpoint/postgres/base.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import random
 import warnings
-from collections.abc import Generator, Mapping, Sequence
+from collections.abc import Mapping, Sequence
 from importlib.metadata import version as get_version
 from typing import Any, TypedDict, cast
 
@@ -17,8 +17,6 @@ from langgraph.checkpoint.base import (
     writes_sort_key,
 )
 from langgraph.checkpoint.serde.types import TASKS
-from psycopg import AsyncCursor, Cursor
-from psycopg.rows import DictRow
 from psycopg.types.json import Jsonb
 
 # Page size for stage-1 paged scan in `get_delta_channel_history`. Internal
@@ -162,218 +160,6 @@ INSERT_CHECKPOINT_WRITES_SQL = """
 """
 
 
-PRUNE_STRATEGIES = ("keep_latest", "delete")
-
-PRUNE_DELETE_THREADS_SQL = (
-    "DELETE FROM checkpoints WHERE thread_id = ANY(%s)",
-    "DELETE FROM checkpoint_blobs WHERE thread_id = ANY(%s)",
-    "DELETE FROM checkpoint_writes WHERE thread_id = ANY(%s)",
-)
-
-# The prune statements below never join two sets of a thread's rows: a join is
-# planned from per-thread row estimates, which are worst for the few huge
-# threads worth pruning, and can go quadratic. They look rows up by primary key
-# instead (`LATERAL ... LIMIT 1`, `= ANY`).
-
-# A `DeltaChannel` leaves update counters in checkpoint metadata, or a
-# snapshot: an inline `true` marker with a blob behind it, which a plain `True`
-# value never has. LangGraph.js inlines no values, but marks the threads its
-# DeltaChannel graphs start with `delta_writes_versioned`.
-PRUNE_DELTA_THREADS_SQL = """
-SELECT thread_id FROM checkpoints
-WHERE thread_id = ANY(%s) AND (
-    metadata ? 'counters_since_delta_snapshot'
-    OR metadata ? 'delta_writes_versioned'
-)
-UNION
-SELECT c.thread_id
-FROM checkpoints c
-CROSS JOIN LATERAL jsonb_each(c.checkpoint -> 'channel_values') AS v
-CROSS JOIN LATERAL (
-    SELECT 1 FROM checkpoint_blobs b
-    WHERE b.thread_id = c.thread_id
-    AND b.checkpoint_ns = c.checkpoint_ns
-    AND b.channel = v.key
-    AND b.version = c.checkpoint -> 'channel_versions' ->> v.key
-    LIMIT 1
-) AS snapshot
-WHERE c.thread_id = ANY(%s) AND v.value = 'true'::jsonb
-"""
-
-# Per namespace: the latest checkpoint, the parent it reads its pending sends
-# from when it predates v4, and the root graph's checkpoint its subgraph call
-# started from, with whether that one is saved.
-PRUNE_HEADS_SQL = f"""
-SELECT
-    h.checkpoint_ns,
-    h.checkpoint_id AS head,
-    CASE WHEN (c.checkpoint ->> 'v')::int < 4 AND EXISTS (
-        SELECT 1 FROM checkpoint_writes w
-        WHERE w.thread_id = %s
-        AND w.checkpoint_ns = h.checkpoint_ns
-        AND w.checkpoint_id = c.parent_checkpoint_id
-        AND w.channel = '{TASKS}'
-    ) THEN c.parent_checkpoint_id END AS sends_parent,
-    c.metadata -> 'parents' ->> '' AS root,
-    EXISTS (
-        SELECT 1 FROM checkpoints r
-        WHERE r.thread_id = %s AND r.checkpoint_ns = ''
-        AND r.checkpoint_id = c.metadata -> 'parents' ->> ''
-    ) AS root_saved
-FROM (
-    SELECT DISTINCT ON (checkpoint_ns) checkpoint_ns, checkpoint_id
-    FROM checkpoints
-    WHERE thread_id = %s
-    ORDER BY checkpoint_ns DESC, checkpoint_id DESC
-) AS h
-CROSS JOIN LATERAL (
-    SELECT checkpoint, parent_checkpoint_id, metadata FROM checkpoints
-    WHERE thread_id = %s
-    AND checkpoint_ns = h.checkpoint_ns
-    AND checkpoint_id = h.checkpoint_id
-) AS c
-"""
-
-PRUNE_SNAPSHOT_SQL = "SET TRANSACTION ISOLATION LEVEL REPEATABLE READ"
-
-PRUNE_UNKEPT_SQL = """
-SELECT checkpoint_id FROM checkpoints
-WHERE thread_id = %s AND checkpoint_ns = %s AND checkpoint_id <> ALL(%s)
-"""
-
-# A run saves a superstep's writes in the background, where they can commit
-# before their checkpoint does, so they go by the checkpoints deleted.
-PRUNE_WRITES_SQL = """
-DELETE FROM checkpoint_writes
-WHERE thread_id = %s AND checkpoint_ns = %s AND checkpoint_id = ANY(%s)
-"""
-
-PRUNE_CHECKPOINTS_SQL = """
-WITH deleted AS (
-    DELETE FROM checkpoints
-    WHERE thread_id = %s AND checkpoint_ns = %s AND checkpoint_id <> ALL(%s)
-    RETURNING checkpoint -> 'channel_versions' AS versions
-)
-SELECT DISTINCT v.key AS channel, v.value AS version
-FROM deleted
-CROSS JOIN LATERAL jsonb_each_text(deleted.versions) AS v
-"""
-
-PRUNE_PARENTS_SQL = """
-UPDATE checkpoints SET parent_checkpoint_id = NULL
-WHERE thread_id = %s AND checkpoint_ns = %s
-AND checkpoint_id = ANY(%s) AND parent_checkpoint_id <> ALL(%s)
-"""
-
-PRUNE_REFERENCED_BLOBS_SQL = """
-SELECT DISTINCT v.key AS channel, v.value AS version
-FROM checkpoints c
-CROSS JOIN LATERAL jsonb_each_text(c.checkpoint -> 'channel_versions') AS v
-WHERE c.thread_id = %s AND c.checkpoint_ns = %s
-"""
-
-PRUNE_BLOBS_SQL = """
-DELETE FROM checkpoint_blobs
-WHERE thread_id = %s AND checkpoint_ns = %s AND channel = %s AND version = ANY(%s)
-"""
-
-PRUNE_SUBGRAPH_CALLS_SQL = (
-    "DELETE FROM checkpoints WHERE thread_id = %s AND checkpoint_ns = ANY(%s)",
-    "DELETE FROM checkpoint_writes WHERE thread_id = %s AND checkpoint_ns = ANY(%s)",
-    "DELETE FROM checkpoint_blobs WHERE thread_id = %s AND checkpoint_ns = ANY(%s)",
-)
-
-
-def _garbage_blobs(
-    freed: Sequence[Mapping[str, Any]], referenced: Sequence[Mapping[str, Any]]
-) -> dict[str, list[str]]:
-    """Blobs a deleted checkpoint used and no kept one does, by channel."""
-    kept = {(r["channel"], r["version"]) for r in referenced}
-    garbage: dict[str, list[str]] = {}
-    for r in freed:
-        if (r["channel"], r["version"]) not in kept:
-            garbage.setdefault(r["channel"], []).append(r["version"])
-    return garbage
-
-
-_Statements = Generator[tuple[str, Sequence[Any], bool], list[DictRow], None]
-
-
-def _refuse_delta_threads(thread_ids: Sequence[str]) -> _Statements:
-    rows = yield PRUNE_DELTA_THREADS_SQL, (thread_ids, thread_ids), True
-    if delta := sorted(r["thread_id"] for r in rows):
-        raise NotImplementedError(
-            f"keep_latest can't prune threads that use a DeltaChannel: {', '.join(delta)}"
-        )
-
-
-def _keep_latest(thread_id: str) -> _Statements:
-    """The statements of one thread's keep_latest transaction, for `_execute`
-    and `_aexecute` to run. Each comes with whether its rows are sent back.
-
-    They all read one snapshot, so what a run saves meanwhile is neither seen
-    nor deleted, whatever its checkpoint ID.
-    """
-    yield PRUNE_SNAPSHOT_SQL, (), False
-    heads = yield PRUNE_HEADS_SQL, (thread_id,) * 4, True
-    # Catches a thread that started using a DeltaChannel after the batch check.
-    yield from _refuse_delta_threads([thread_id])
-    kept = {
-        h["checkpoint_ns"]: [i for i in (h["head"], h["sends_parent"]) if i]
-        for h in heads
-    }
-    # A subgraph call's namespace has its task ID after a ":", unlike a
-    # `checkpointer=True` subgraph's, whose state outlives each call. A call
-    # goes with the root checkpoint it started from, but only once that one is
-    # saved: runs save in the background, so a call can commit first.
-    calls = {
-        h["checkpoint_ns"]
-        for h in heads
-        if ":" in h["checkpoint_ns"]
-        and h["root_saved"]
-        and h["root"] not in kept.get("", ())
-    }
-    if calls:
-        for sql in PRUNE_SUBGRAPH_CALLS_SQL:
-            yield sql, (thread_id, list(calls)), False
-    for ns, ids in kept.items():
-        if ns in calls:
-            continue
-        unkept = yield PRUNE_UNKEPT_SQL, (thread_id, ns, ids), True
-        if unkept:
-            deleted = [r["checkpoint_id"] for r in unkept]
-            yield PRUNE_WRITES_SQL, (thread_id, ns, deleted), False
-        freed = yield PRUNE_CHECKPOINTS_SQL, (thread_id, ns, ids), True
-        yield PRUNE_PARENTS_SQL, (thread_id, ns, ids, ids), False
-        if freed:
-            referenced = yield PRUNE_REFERENCED_BLOBS_SQL, (thread_id, ns), True
-            for channel, versions in _garbage_blobs(freed, referenced).items():
-                yield PRUNE_BLOBS_SQL, (thread_id, ns, channel, versions), False
-
-
-# Unprepared, so Postgres plans each statement knowing its arrays: a cached
-# generic plan checks a row against an `= ANY(...)` array one element at a time.
-def _execute(cur: Cursor[DictRow], statements: _Statements) -> None:
-    try:
-        sql, params, fetch = next(statements)
-        while True:
-            cur.execute(sql, params, prepare=False)
-            sql, params, fetch = statements.send(cur.fetchall() if fetch else [])
-    except StopIteration:
-        pass
-
-
-async def _aexecute(cur: AsyncCursor[DictRow], statements: _Statements) -> None:
-    try:
-        sql, params, fetch = next(statements)
-        while True:
-            await cur.execute(sql, params, prepare=False)
-            rows = await cur.fetchall() if fetch else []
-            sql, params, fetch = statements.send(rows)
-    except StopIteration:
-        pass
-
-
 class _DeltaStage2Row(TypedDict, total=False):
     """One row from `_build_delta_stage2_sql` (a UNION ALL of writes and blobs)."""
 

libs/checkpoint-postgres/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-checkpoint-postgres"
-version = "3.2.0"
+version = "3.1.3"
 description = "Library with a Postgres implementation of LangGraph checkpoint saver."
 authors = []
 requires-python = ">=3.10"

libs/checkpoint-postgres/tests/test_prune.py

@@ -1,540 +0,0 @@
-import asyncio
-from collections.abc import Awaitable, Callable
-from contextlib import asynccontextmanager
-from typing import Any
-from uuid import uuid4
-
-import pytest
-from langgraph.checkpoint.base import empty_checkpoint
-from langgraph.checkpoint.base.id import uuid6
-from langgraph.checkpoint.conformance import validate
-from langgraph.checkpoint.conformance.initializer import checkpointer_test
-from langgraph.checkpoint.serde.types import TASKS, _DeltaSnapshot
-from psycopg import AsyncConnection
-
-from langgraph.checkpoint.postgres.aio import AsyncPostgresSaver
-from langgraph.checkpoint.postgres.base import (
-    PRUNE_DELTA_THREADS_SQL,
-    PRUNE_HEADS_SQL,
-    PRUNE_REFERENCED_BLOBS_SQL,
-)
-from tests.conftest import DEFAULT_POSTGRES_URI, DEFAULT_URI
-from tests.test_async import _saver as _async_saver
-from tests.test_sync import _saver as _sync_saver
-
-SAVERS = ["base", "pool", "pipe", "aio_base", "aio_pool", "aio_pipe"]
-
-
-@asynccontextmanager
-async def _saver(name: str):
-    if name.startswith("aio_"):
-        async with _async_saver(name.removeprefix("aio_")) as saver:
-            yield saver
-    else:
-        with _sync_saver(name) as saver:
-            yield saver
-
-
-async def _call(saver: Any, method: str, *args: Any, **kwargs: Any) -> Any:
-    if isinstance(saver, AsyncPostgresSaver):
-        return await getattr(saver, f"a{method}")(*args, **kwargs)
-    return getattr(saver, method)(*args, **kwargs)
-
-
-async def _rows(saver: Any, thread_id: str) -> dict[str, list[tuple]]:
-    queries = {
-        "checkpoints": "SELECT checkpoint_ns, checkpoint_id FROM checkpoints"
-        " WHERE thread_id = %s ORDER BY 1, 2",
-        "writes": "SELECT checkpoint_ns, checkpoint_id, task_id, idx"
-        " FROM checkpoint_writes WHERE thread_id = %s ORDER BY 1, 2, 3, 4",
-        "blobs": "SELECT checkpoint_ns, channel, version FROM checkpoint_blobs"
-        " WHERE thread_id = %s ORDER BY 1, 2, 3",
-    }
-    rows = {}
-    for table, sql in queries.items():
-        if isinstance(saver, AsyncPostgresSaver):
-            async with saver._cursor() as cur:
-                await cur.execute(sql, (thread_id,))
-                rows[table] = [tuple(r.values()) for r in await cur.fetchall()]
-        else:
-            with saver._cursor() as cur:
-                cur.execute(sql, (thread_id,))
-                rows[table] = [tuple(r.values()) for r in cur.fetchall()]
-    return rows
-
-
-async def _put(
-    saver: Any,
-    thread_id: str,
-    parent: dict | None,
-    step: int,
-    values: dict[str, Any],
-    versions: dict[str, str],
-    *,
-    ns: str = "",
-    metadata: dict[str, Any] | None = None,
-    v: int = 4,
-    checkpoint_id: str | None = None,
-) -> dict:
-    config = {"configurable": {"thread_id": thread_id, "checkpoint_ns": ns}}
-    if parent is not None:
-        config["configurable"]["checkpoint_id"] = parent["configurable"][
-            "checkpoint_id"
-        ]
-    checkpoint = empty_checkpoint()
-    checkpoint.update(
-        v=v,
-        id=checkpoint_id or str(uuid6(clock_seq=step)),
-        channel_values=values,
-        channel_versions=versions,
-    )
-    new_versions = {k: versions[k] for k in values}
-    return await _call(
-        saver,
-        "put",
-        config,
-        checkpoint,
-        {"source": "loop", "step": step, "parents": {}, **(metadata or {})},
-        new_versions,
-    )
-
-
-async def _three_checkpoints(
-    saver: Any,
-    thread_id: str,
-    ns: str = "",
-    metadata: dict[str, Any] | None = None,
-) -> dict:
-    parent = None
-    steps = [
-        ({"a": [1], "s": ["shared"]}, {"a": "1", "s": "1"}),
-        ({"a": [1, 2]}, {"a": "2", "s": "1"}),
-        ({"a": [1, 2, 3]}, {"a": "3", "s": "1"}),
-    ]
-    for step, (values, versions) in enumerate(steps):
-        parent = await _put(
-            saver, thread_id, parent, step, values, versions, ns=ns, metadata=metadata
-        )
-        await _call(saver, "put_writes", parent, [("a", step)], str(uuid4()))
-    return parent
-
-
-@asynccontextmanager
-async def _second_saver(saver: AsyncPostgresSaver):
-    assert isinstance(saver.conn, AsyncConnection)
-    uri = DEFAULT_POSTGRES_URI + saver.conn.info.dbname
-    async with AsyncPostgresSaver.from_conn_string(uri) as other:
-        yield other
-
-
-def _run_once_after(
-    saver: AsyncPostgresSaver,
-    sql: str,
-    action: Callable[[], Awaitable[Any]],
-    *,
-    nth: int = 1,
-) -> None:
-    seen = 0
-    cursor = saver._cursor
-
-    class Hooked:
-        def __init__(self, cur: Any) -> None:
-            self.cur = cur
-
-        def __getattr__(self, name: str) -> Any:
-            return getattr(self.cur, name)
-
-        async def execute(self, query: Any, params: Any = None, **kwargs: Any) -> None:
-            nonlocal seen
-            await self.cur.execute(query, params, **kwargs)
-            if query is sql:
-                seen += 1
-                if seen == nth:
-                    await action()
-
-    @asynccontextmanager
-    async def hooked(**kwargs: Any):
-        async with cursor(**kwargs) as cur:
-            yield Hooked(cur)
-
-    saver._cursor = hooked
-
-
-async def _delta_thread(saver: Any, thread_id: str, evidence: str) -> None:
-    if evidence == "counters":
-        first = await _put(saver, thread_id, None, 0, {"m": [1]}, {"m": "1"})
-        await _put(
-            saver,
-            thread_id,
-            first,
-            1,
-            {},
-            {"m": "2"},
-            metadata={"counters_since_delta_snapshot": {"m": [1, 1]}},
-        )
-    elif evidence == "snapshot":
-        first = await _put(
-            saver, thread_id, None, 0, {"m": _DeltaSnapshot([1])}, {"m": "1"}
-        )
-        await _put(saver, thread_id, first, 1, {}, {"m": "2"})
-    else:
-        marker = {"delta_writes_versioned": True}
-        first = await _put(
-            saver, thread_id, None, 0, {"m": [1]}, {"m": "1"}, metadata=marker
-        )
-        await _put(
-            saver, thread_id, first, 1, {"m": [1, 2]}, {"m": "2"}, metadata=marker
-        )
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_keeps_each_namespace_head_with_its_writes_and_blobs(
-    name: str,
-) -> None:
-    async with _saver(name) as saver:
-        thread_id, other_id = str(uuid4()), str(uuid4())
-        heads = {
-            ns: await _three_checkpoints(saver, thread_id, ns) for ns in ("", "sub:1")
-        }
-        await _three_checkpoints(saver, other_id)
-        before = {ns: await _call(saver, "get_tuple", h) for ns, h in heads.items()}
-        other_before = await _rows(saver, other_id)
-
-        await _call(saver, "prune", [thread_id])
-
-        rows = await _rows(saver, thread_id)
-        assert rows["checkpoints"] == [
-            (ns, heads[ns]["configurable"]["checkpoint_id"]) for ns in ("", "sub:1")
-        ]
-        assert [(ns, cid) for ns, cid, *_ in rows["writes"]] == rows["checkpoints"]
-        assert rows["blobs"] == [
-            (ns, ch, ver)
-            for ns in ("", "sub:1")
-            for ch, ver in (("a", "3"), ("s", "1"))
-        ]
-        for ns, head in heads.items():
-            assert await _call(saver, "get_tuple", head) == before[ns]._replace(
-                parent_config=None
-            )
-        assert await _rows(saver, other_id) == other_before
-
-
-@pytest.mark.parametrize("evidence", ["counters", "snapshot", "versioned"])
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_refuses_a_batch_with_a_delta_channel_thread(
-    name: str, evidence: str
-) -> None:
-    async with _saver(name) as saver:
-        ordinary_id, delta_id = str(uuid4()), str(uuid4())
-        await _three_checkpoints(saver, ordinary_id)
-        await _delta_thread(saver, delta_id, evidence)
-        before = [await _rows(saver, t) for t in (ordinary_id, delta_id)]
-
-        with pytest.raises(NotImplementedError, match=delta_id):
-            await _call(saver, "prune", [ordinary_id, delta_id])
-
-        assert [await _rows(saver, t) for t in (ordinary_id, delta_id)] == before
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_prunes_a_thread_storing_a_plain_true(name: str) -> None:
-    async with _saver(name) as saver:
-        thread_id = str(uuid4())
-        first = await _put(
-            saver, thread_id, None, 0, {"flag": True, "a": [1]}, {"flag": "1", "a": "1"}
-        )
-        head = await _put(
-            saver, thread_id, first, 1, {"flag": True}, {"flag": "2", "a": "1"}
-        )
-
-        await _call(saver, "prune", [thread_id])
-
-        assert (await _rows(saver, thread_id))["checkpoints"] == [
-            ("", head["configurable"]["checkpoint_id"])
-        ]
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_keeps_the_parent_holding_a_pre_v4_heads_sends(
-    name: str,
-) -> None:
-    async with _saver(name) as saver:
-        thread_id = str(uuid4())
-        first = await _put(saver, thread_id, None, 0, {}, {}, v=1)
-        await _call(saver, "put_writes", first, [(TASKS, "send-1")], str(uuid4()))
-        second = await _put(saver, thread_id, first, 1, {}, {}, v=1)
-        head = await _put(saver, thread_id, second, 2, {}, {}, v=1)
-        await _call(saver, "put_writes", second, [(TASKS, "send-2")], str(uuid4()))
-
-        await _call(saver, "prune", [thread_id])
-
-        assert (await _rows(saver, thread_id))["checkpoints"] == [
-            ("", second["configurable"]["checkpoint_id"]),
-            ("", head["configurable"]["checkpoint_id"]),
-        ]
-        loaded = await _call(saver, "get_tuple", head)
-        assert loaded.checkpoint["channel_values"][TASKS] == ["send-2"]
-        assert loaded.parent_config == second
-        assert (await _call(saver, "get_tuple", second)).parent_config is None
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_delete_removes_every_row_of_the_threads(name: str) -> None:
-    async with _saver(name) as saver:
-        ordinary_id, delta_id, other_id = str(uuid4()), str(uuid4()), str(uuid4())
-        await _three_checkpoints(saver, ordinary_id)
-        await _delta_thread(saver, delta_id, "counters")
-        await _three_checkpoints(saver, other_id)
-        other_before = await _rows(saver, other_id)
-
-        await _call(saver, "prune", [ordinary_id, delta_id], strategy="delete")
-
-        empty = {"checkpoints": [], "writes": [], "blobs": []}
-        assert await _rows(saver, ordinary_id) == empty
-        assert await _rows(saver, delta_id) == empty
-        assert await _rows(saver, other_id) == other_before
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_unknown_strategy_changes_nothing(name: str) -> None:
-    async with _saver(name) as saver:
-        thread_id = str(uuid4())
-        await _three_checkpoints(saver, thread_id)
-        before = await _rows(saver, thread_id)
-
-        with pytest.raises(ValueError, match="keep_all"):
-            await _call(saver, "prune", [thread_id], strategy="keep_all")
-
-        assert await _rows(saver, thread_id) == before
-
-
-async def test_async_saver_prune_runs_from_another_thread_only() -> None:
-    async with _saver("aio_base") as saver:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-
-        with pytest.raises(asyncio.InvalidStateError):
-            saver.prune([thread_id])
-        await asyncio.to_thread(saver.prune, [thread_id])
-
-        assert (await _rows(saver, thread_id))["checkpoints"] == [
-            ("", head["configurable"]["checkpoint_id"])
-        ]
-
-
-async def test_prune_conformance() -> None:
-    @checkpointer_test(name="AsyncPostgresSaver")
-    async def postgres_saver():
-        async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-            await saver.setup()
-            yield saver
-
-    report = await validate(postgres_saver, capabilities={"prune"})
-
-    prune = report.results["prune"]
-    if not prune.passed:
-        details = "\n".join(prune.failures)
-        pytest.fail(f"Capability prune failed (passed={prune.passed}):\n{details}")
-
-
-@pytest.mark.parametrize("strategy", ["keep_latest", "delete"])
-@pytest.mark.parametrize("name", ["base", "aio_base"])
-async def test_prune_rejects_a_single_thread_id_string(
-    name: str, strategy: str
-) -> None:
-    async with _saver(name) as saver:
-        for thread_id in ("ab", "a", "b"):
-            await _three_checkpoints(saver, thread_id)
-        before = [await _rows(saver, t) for t in ("ab", "a", "b")]
-
-        with pytest.raises(TypeError, match="not a str"):
-            await _call(saver, "prune", "ab", strategy=strategy)
-
-        assert [await _rows(saver, t) for t in ("ab", "a", "b")] == before
-
-
-@pytest.mark.parametrize(
-    "after", [PRUNE_HEADS_SQL, PRUNE_REFERENCED_BLOBS_SQL], ids=["heads", "blobs"]
-)
-async def test_keep_latest_keeps_a_checkpoint_saved_while_it_runs(after: str) -> None:
-    async with _saver("aio_base") as saver, _second_saver(saver) as other:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-        saved: list[dict] = []
-
-        async def save_a_child() -> None:
-            saved.append(
-                await _put(
-                    other, thread_id, head, 3, {"a": [1, 2, 3, 4]}, {"a": "4", "s": "1"}
-                )
-            )
-
-        _run_once_after(saver, after, save_a_child)
-        await saver.aprune([thread_id])
-
-        loaded = await saver.aget_tuple(saved[0])
-        assert loaded is not None, "the checkpoint saved during the prune was deleted"
-        assert loaded.checkpoint["channel_values"] == {
-            "a": [1, 2, 3, 4],
-            "s": ["shared"],
-        }
-        assert loaded.parent_config == head
-
-
-async def test_keep_latest_refuses_a_thread_that_turns_delta_after_the_batch_check() -> (
-    None
-):
-    async with _saver("aio_base") as saver, _second_saver(saver) as other:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-
-        async def save_a_delta_checkpoint() -> None:
-            await _put(
-                other,
-                thread_id,
-                head,
-                3,
-                {},
-                {"a": "4", "s": "1"},
-                metadata={"counters_since_delta_snapshot": {"a": [1, 1]}},
-            )
-
-        _run_once_after(saver, PRUNE_DELTA_THREADS_SQL, save_a_delta_checkpoint)
-        with pytest.raises(NotImplementedError, match=thread_id):
-            await saver.aprune([thread_id])
-
-        assert len((await _rows(saver, thread_id))["checkpoints"]) == 4
-
-
-async def test_keep_latest_keeps_the_history_of_a_delta_checkpoint_saved_after_the_thread_check() -> (
-    None
-):
-    async with _saver("aio_base") as saver, _second_saver(saver) as other:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-        saved: list[dict] = []
-
-        async def save_a_delta_checkpoint() -> None:
-            saved.append(
-                await _put(
-                    other,
-                    thread_id,
-                    head,
-                    3,
-                    {},
-                    {"a": "4", "s": "1"},
-                    metadata={"counters_since_delta_snapshot": {"a": [1, 1]}},
-                )
-            )
-
-        _run_once_after(saver, PRUNE_DELTA_THREADS_SQL, save_a_delta_checkpoint, nth=2)
-        await saver.aprune([thread_id])
-
-        assert (await _rows(saver, thread_id))["checkpoints"] == [
-            ("", head["configurable"]["checkpoint_id"]),
-            ("", saved[0]["configurable"]["checkpoint_id"]),
-        ]
-        history = await saver.aget_delta_channel_history(
-            config=saved[0], channels=["a"]
-        )
-        assert history["a"]["seed"] == [1, 2, 3]
-        assert [value for _, _, value in history["a"]["writes"]] == [2]
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_deletes_a_subgraph_call_with_the_checkpoint_it_started_from(
-    name: str,
-) -> None:
-    async with _saver(name) as saver:
-        thread_id = str(uuid4())
-        older = await _put(saver, thread_id, None, 0, {}, {})
-        head = await _put(saver, thread_id, older, 1, {}, {})
-        unsaved = str(uuid6(clock_seq=2))
-        started_from = {
-            "finished:1": older["configurable"]["checkpoint_id"],
-            "interrupted:2": head["configurable"]["checkpoint_id"],
-            "running:3": unsaved,
-            "checkpointer_true": older["configurable"]["checkpoint_id"],
-        }
-        for ns, root in started_from.items():
-            await _three_checkpoints(
-                saver, thread_id, ns, metadata={"parents": {"": root}}
-            )
-
-        await _call(saver, "prune", [thread_id])
-
-        rows = await _rows(saver, thread_id)
-        assert {ns for ns, *_ in rows["checkpoints"]} == {
-            "",
-            "interrupted:2",
-            "running:3",
-            "checkpointer_true",
-        }
-        assert {ns for ns, *_ in rows["writes"]} == {
-            "interrupted:2",
-            "running:3",
-            "checkpointer_true",
-        }
-        assert {ns for ns, *_ in rows["blobs"]} == {
-            "interrupted:2",
-            "running:3",
-            "checkpointer_true",
-        }
-
-
-async def test_keep_latest_keeps_a_checkpoint_saved_meanwhile_whatever_its_id() -> None:
-    async with _saver("aio_base") as saver, _second_saver(saver) as other:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-        lower_id = "0" + head["configurable"]["checkpoint_id"][1:]
-        saved: list[dict] = []
-
-        async def save_a_child_with_a_lower_id() -> None:
-            child = await _put(
-                other,
-                thread_id,
-                head,
-                3,
-                {"a": [1, 2, 3, 4]},
-                {"a": "4", "s": "1"},
-                checkpoint_id=lower_id,
-            )
-            await _call(other, "put_writes", child, [("a", 4)], str(uuid4()))
-            saved.append(child)
-
-        _run_once_after(saver, PRUNE_HEADS_SQL, save_a_child_with_a_lower_id)
-        await saver.aprune([thread_id])
-
-        loaded = await saver.aget_tuple(saved[0])
-        assert loaded is not None, "the checkpoint saved during the prune was deleted"
-        assert loaded.checkpoint["channel_values"] == {
-            "a": [1, 2, 3, 4],
-            "s": ["shared"],
-        }
-        assert [value for _, _, value in loaded.pending_writes or []] == [4]
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_keeps_writes_saved_before_their_checkpoint(
-    name: str,
-) -> None:
-    async with _saver(name) as saver:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-        next_id = str(uuid6(clock_seq=3))
-        next_config = {
-            "configurable": {
-                "thread_id": thread_id,
-                "checkpoint_ns": "",
-                "checkpoint_id": next_id,
-            }
-        }
-        await _call(saver, "put_writes", next_config, [("a", 4)], str(uuid4()))
-
-        await _call(saver, "prune", [thread_id])
-        await _put(
-            saver, thread_id, head, 3, {}, {"a": "3", "s": "1"}, checkpoint_id=next_id
-        )
-
-        loaded = await _call(saver, "get_tuple", next_config)
-        assert [value for _, _, value in loaded.pending_writes] == [4]

libs/checkpoint-postgres/uv.lock

@@ -40,11 +40,11 @@ wheels = [
 
 [[package]]
 name = "certifi"
-version = "2026.10.19"
+version = "2026.1.4"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/a6/bd/1436c50cc46699de0230fbaacc1d1de7bfec413176099949e9d5112e88f2/certifi-2026.10.19.tar.gz", hash = "sha256:035c1e85572b141bf1c3a3eff0e33a8eb74917522f2559075ff8d2fea780a1ae", size = 137598, upload-time = "2026-10-20T02:24:16.604Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/e0/2d/a891ca51311197f6ad14a7ef42e2399f36cf2f9bd44752b3dc4eab60fdc5/certifi-2026.1.4.tar.gz", hash = "sha256:ac726dd470482006e014ad384921ed6438c457018f4b3d204aea4281258b2120", size = 154268, upload-time = "2026-01-04T02:42:41.825Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c4/51/29046e48f693c54e5b7412216d447a1d8362c9653148d98c02cdf65fa733/certifi-2026.10.19-py3-none-any.whl", hash = "sha256:42d35340cc5b9ba78e818ddbff0c5b1c2b779de448a340fd1b989f5fa8670e1b", size = 136464, upload-time = "2026-10-20T02:24:15.072Z" },
+    { url = "https://files.pythonhosted.org/packages/e6/ad/3cc14f097111b4de0040c83a525973216457bbeeb63739ef1ed275c1c021/certifi-2026.1.4-py3-none-any.whl", hash = "sha256:9943707519e4add1115f44c2bc244f782c0249876bf51b6599fee1ffbedd685c", size = 152900, upload-time = "2026-01-04T02:42:40.15Z" },
 ]
 
 [[package]]
@@ -278,7 +278,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.3.1"
+version = "4.3.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
@@ -353,7 +353,7 @@ test = [
 
 [[package]]
 name = "langgraph-checkpoint-postgres"
-version = "3.2.0"
+version = "3.1.3"
 source = { editable = "." }
 dependencies = [
     { name = "langgraph-checkpoint" },

libs/checkpoint-sqlite/tests/test_store.py

@@ -1364,17 +1364,6 @@ def test_search_empty_prefix_is_unconstrained(store: SqliteStore) -> None:
     }
 
 
-@pytest.mark.parametrize("batched", [False, True])
-def test_search_rejects_nul_namespace_prefix(store: SqliteStore, batched: bool) -> None:
-    store.put(("a",), "key", {"v": 1})
-
-    with pytest.raises(InvalidNamespaceError, match="NUL"):
-        if batched:
-            store.batch([SearchOp(("a\x00",))])
-        else:
-            store.search(("a\x00",))
-
-
 def test_namespace_labels_with_trailing_newline(store: SqliteStore) -> None:
     """Labels may contain newlines, and must not match a differently-named label.
 

libs/checkpoint-sqlite/uv.lock

@@ -49,11 +49,11 @@ wheels = [
 
 [[package]]
 name = "certifi"
-version = "2026.10.19"
+version = "2026.1.4"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/a6/bd/1436c50cc46699de0230fbaacc1d1de7bfec413176099949e9d5112e88f2/certifi-2026.10.19.tar.gz", hash = "sha256:035c1e85572b141bf1c3a3eff0e33a8eb74917522f2559075ff8d2fea780a1ae", size = 137598, upload-time = "2026-10-20T02:24:16.604Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/e0/2d/a891ca51311197f6ad14a7ef42e2399f36cf2f9bd44752b3dc4eab60fdc5/certifi-2026.1.4.tar.gz", hash = "sha256:ac726dd470482006e014ad384921ed6438c457018f4b3d204aea4281258b2120", size = 154268, upload-time = "2026-01-04T02:42:41.825Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c4/51/29046e48f693c54e5b7412216d447a1d8362c9653148d98c02cdf65fa733/certifi-2026.10.19-py3-none-any.whl", hash = "sha256:42d35340cc5b9ba78e818ddbff0c5b1c2b779de448a340fd1b989f5fa8670e1b", size = 136464, upload-time = "2026-10-20T02:24:15.072Z" },
+    { url = "https://files.pythonhosted.org/packages/e6/ad/3cc14f097111b4de0040c83a525973216457bbeeb63739ef1ed275c1c021/certifi-2026.1.4-py3-none-any.whl", hash = "sha256:9943707519e4add1115f44c2bc244f782c0249876bf51b6599fee1ffbedd685c", size = 152900, upload-time = "2026-01-04T02:42:40.15Z" },
 ]
 
 [[package]]
@@ -285,7 +285,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.3.1"
+version = "4.3.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },

libs/checkpoint/langgraph/store/base/__init__.py

@@ -1333,10 +1333,6 @@ def _validate_namespace_labels(namespace: tuple[str, ...]) -> None:
             raise InvalidNamespaceError(
                 f"Invalid namespace label '{label}' found in {namespace}. Namespace labels cannot contain periods ('.')."
             )
-        elif "\x00" in label:
-            raise InvalidNamespaceError(
-                f"Invalid namespace label '{label}' found in {namespace}. Namespace labels cannot contain NUL bytes ('\\x00')."
-            )
         elif not label:
             raise InvalidNamespaceError(
                 f"Namespace labels cannot be empty strings. Got {label} in {namespace}"

libs/checkpoint/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-checkpoint"
-version = "4.3.1"
+version = "4.3.0"
 description = "Library with base interfaces for LangGraph checkpoint savers."
 authors = []
 requires-python = ">=3.10"

libs/checkpoint/tests/test_store.py

@@ -532,7 +532,7 @@ async def test_cannot_put_empty_namespace() -> None:
     assert (await async_store.aget(("valid", "namespace"), "key")) is None
 
 
-INVALID_NAMESPACES = [("foo.bar",), ("foo\x00",), ("foo", ""), (123,)]
+INVALID_NAMESPACES = [("foo.bar",), ("foo", ""), (123,)]
 NAMESPACE_METHODS = ["get", "delete", "search", "prefix", "suffix"]
 
 

libs/checkpoint/uv.lock

@@ -51,11 +51,11 @@ wheels = [
 
 [[package]]
 name = "certifi"
-version = "2026.10.19"
+version = "2026.1.4"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/a6/bd/1436c50cc46699de0230fbaacc1d1de7bfec413176099949e9d5112e88f2/certifi-2026.10.19.tar.gz", hash = "sha256:035c1e85572b141bf1c3a3eff0e33a8eb74917522f2559075ff8d2fea780a1ae", size = 137598, upload-time = "2026-10-20T02:24:16.604Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/e0/2d/a891ca51311197f6ad14a7ef42e2399f36cf2f9bd44752b3dc4eab60fdc5/certifi-2026.1.4.tar.gz", hash = "sha256:ac726dd470482006e014ad384921ed6438c457018f4b3d204aea4281258b2120", size = 154268, upload-time = "2026-01-04T02:42:41.825Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c4/51/29046e48f693c54e5b7412216d447a1d8362c9653148d98c02cdf65fa733/certifi-2026.10.19-py3-none-any.whl", hash = "sha256:42d35340cc5b9ba78e818ddbff0c5b1c2b779de448a340fd1b989f5fa8670e1b", size = 136464, upload-time = "2026-10-20T02:24:15.072Z" },
+    { url = "https://files.pythonhosted.org/packages/e6/ad/3cc14f097111b4de0040c83a525973216457bbeeb63739ef1ed275c1c021/certifi-2026.1.4-py3-none-any.whl", hash = "sha256:9943707519e4add1115f44c2bc244f782c0249876bf51b6599fee1ffbedd685c", size = 152900, upload-time = "2026-01-04T02:42:40.15Z" },
 ]
 
 [[package]]
@@ -301,7 +301,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.3.1"
+version = "4.3.0"
 source = { editable = "." }
 dependencies = [
     { name = "langchain-core" },

libs/cli/generate_schema.py

@@ -23,7 +23,6 @@ from langgraph_cli.schemas import (
     GraphDef,
     HttpConfig,
     IndexConfig,
-    PriorityConfig,
     SecurityConfig,
     SerdeConfig,
     StoreConfig,
@@ -114,7 +113,6 @@ def add_descriptions_to_schema(schema, cls):
                 StoreConfig,
                 IndexConfig,
                 AuthConfig,
-                PriorityConfig,
                 SecurityConfig,
                 HttpConfig,
                 CorsConfig,

libs/cli/js-examples/package.json

@@ -21,8 +21,8 @@
     "test:all": "yarn test && yarn test:int && yarn lint:langgraph"
   },
   "dependencies": {
-    "@langchain/core": "^1.2.13",
-    "@langchain/langgraph": "^1.4.18"
+    "@langchain/core": "^1.2.9",
+    "@langchain/langgraph": "^1.4.13"
   },
   "resolutions": {
     "@langchain/langgraph-checkpoint": "1.0.4",
@@ -30,21 +30,21 @@
     "@eslint/eslintrc/js-yaml": "4.3.2"
   },
   "devDependencies": {
-    "@eslint/eslintrc": "^3.3.7",
+    "@eslint/eslintrc": "^3.3.6",
     "@eslint/js": "^10.0.1",
     "@tsconfig/recommended": "^1.0.13",
     "@types/jest": "^30.0.0",
-    "@typescript-eslint/eslint-plugin": "^8.70.1",
-    "@typescript-eslint/parser": "^8.70.1",
-    "dotenv": "^18.0.4",
-    "eslint": "^10.11.0",
+    "@typescript-eslint/eslint-plugin": "^8.68.0",
+    "@typescript-eslint/parser": "^8.68.0",
+    "dotenv": "^17.4.2",
+    "eslint": "^10.9.1",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-import": "^2.32.0",
     "eslint-plugin-no-instanceof": "^1.0.1",
     "eslint-plugin-prettier": "^5.5.6",
-    "jest": "^30.5.2",
-    "prettier": "^3.9.9",
-    "ts-jest": "^29.4.14",
+    "jest": "^30.5.0",
+    "prettier": "^3.9.6",
+    "ts-jest": "^29.4.12",
     "typescript": "^7.0.2"
   }
 }

libs/cli/js-monorepo-example/yarn.lock

@@ -581,17 +581,17 @@ base64-js@^1.5.1:
   integrity sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==
 
 brace-expansion@^1.1.7:
-  version "1.1.21"
-  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.21.tgz#edf4fab5c64d051aea5a8def49aba1c7522279f3"
-  integrity sha512-9zeA+KLZNNzglF2TPKRQEDyx6Yby7daAkuy8MiPzpXPsYDWi/DRM8jmwUDxokQjYqBpv5DgPiwD4h4ZZSy1Ujw==
+  version "1.1.12"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.12.tgz#ab9b454466e5a8cc3a187beaad580412a9c5b843"
+  integrity sha512-9T9UjW3r0UW5c1Q7GTwllptXwhvYmEzFhzMfZ9H7FQWt+uZePjZPjBP/W1ZEyZ1twGWom5/56TF4lPcqjnDHcg==
   dependencies:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
 brace-expansion@^5.0.8:
-  version "5.0.12"
-  resolved "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.12.tgz#995fbb4750a77c4d16a7dc942ff2ca6ef8e675ec"
-  integrity sha512-YovQ3rzhaLMIrDjNDMkNS01tea93qhEhG5xy8f6+R0l+dw3Ki+5sCoIoI942iuLZTHWogWktgwVDhU09iNEimQ==
+  version "5.0.9"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-5.0.9.tgz#7c72438809b5fa5babf54199a1f1c281a6984fcf"
+  integrity sha512-ScQ4IuvIEF1TMlP7Zt+vjJ//9zlPb2SDcxWxM3bk8s6t6GGdJ7KO1dCcTidOPJKePW30LE/2cT7wCyPho9/Wxg==
   dependencies:
     balanced-match "^4.0.2"
 

libs/cli/langgraph_cli/__init__.py

@@ -1 +1 @@
-__version__ = "0.4.40"
+__version__ = "0.4.33"

libs/cli/langgraph_cli/cli.py

@@ -847,7 +847,6 @@ def dev(
         store=config_json.get("store"),
         wait_for_client=wait_for_client,
         auth=config_json.get("auth"),
-        priority=config_json.get("priority"),
         http=config_json.get("http"),
         ui=config_json.get("ui"),
         ui_config=config_json.get("ui_config"),

libs/cli/langgraph_cli/config.py

@@ -442,7 +442,6 @@ def validate_config(
         "store": config.get("store"),
         "auth": config.get("auth"),
         "encryption": config.get("encryption"),
-        "priority": config.get("priority"),
         "http": config.get("http"),
         # Pass through webhooks config so it can be injected into the image
         "webhooks": config.get("webhooks"),
@@ -607,19 +606,6 @@ def validate_config(
                     f"Invalid encryption.path format: '{encryption_conf['path']}'. "
                     "Must be in format './path/to/file.py:attribute_name'"
                 )
-    # Validate priority config
-    if priority_conf := config.get("priority"):
-        if "path" in priority_conf:
-            if ":" not in priority_conf["path"]:
-                raise ValueError(
-                    f"Invalid priority.path format: '{priority_conf['path']}'. "
-                    "Must be in format './path/to/file.py:attribute_name'"
-                )
-            if _is_node_graph(priority_conf["path"]):
-                raise ValueError(
-                    "JavaScript priority callbacks are not supported: "
-                    f"'{priority_conf['path']}'. Use a Python file or module instead."
-                )
     if http_conf := config.get("http"):
         if "app" in http_conf:
             if ":" not in http_conf["app"]:
@@ -663,7 +649,6 @@ _KNOWN_CONFIG_KEYS = {
     "store",
     "auth",
     "encryption",
-    "priority",
     "http",
     "webhooks",
     "checkpointer",
@@ -1095,49 +1080,6 @@ def _update_encryption_path(
     )
 
 
-def _update_priority_path(
-    config_path: pathlib.Path, config: Config, local_deps: LocalDeps
-) -> None:
-    """Update priority.path to use Docker container paths."""
-    priority_conf = config.get("priority")
-    if not priority_conf or not (path_str := priority_conf.get("path")):
-        return
-
-    module_str, sep, attr_str = path_str.partition(":")
-    if not sep or not module_str.startswith("."):
-        return  # Already validated or absolute path
-
-    resolved = config_path.parent / module_str
-    if not resolved.exists():
-        raise FileNotFoundError(
-            f"Priority file not found: {resolved} (from {path_str})"
-        )
-    if not resolved.is_file():
-        raise IsADirectoryError(f"Priority path must be a file: {resolved}")
-
-    # Check faux packages first (they take precedence)
-    for faux_path, (_, destpath) in local_deps.faux_pkgs.items():
-        if resolved.is_relative_to(faux_path):
-            new_path = f"{destpath}/{resolved.relative_to(faux_path)}:{attr_str}"
-            priority_conf["path"] = new_path
-            return
-
-    # Check real packages
-    for real_path in local_deps.real_pkgs:
-        if resolved.is_relative_to(real_path):
-            new_path = (
-                f"/deps/{real_path.name}/{resolved.relative_to(real_path)}:{attr_str}"
-            )
-            priority_conf["path"] = new_path
-            return
-
-    raise ValueError(
-        f"Priority file '{resolved}' not covered by dependencies.\n"
-        "Add its parent directory to the 'dependencies' array in your config.\n"
-        f"Current dependencies: {config['dependencies']}"
-    )
-
-
 def _update_checkpointer_path(
     config_path: pathlib.Path, config: Config, local_deps: LocalDeps
 ) -> None:
@@ -1271,9 +1213,6 @@ def _build_runtime_env_vars(config: Config) -> list[str]:
     if (encryption_config := config.get("encryption")) is not None:
         env_vars.append(f"ENV LANGGRAPH_ENCRYPTION='{json.dumps(encryption_config)}'")
 
-    if (priority_config := config.get("priority")) is not None:
-        env_vars.append(f"ENV LANGGRAPH_PRIORITY='{json.dumps(priority_config)}'")
-
     if (http_config := config.get("http")) is not None:
         env_vars.append(f"ENV LANGGRAPH_HTTP='{json.dumps(http_config)}'")
 
@@ -1441,8 +1380,6 @@ def python_config_to_docker(
     _update_auth_path(config_path, config, local_deps)
     # Rewrite encryption path, so it points to the correct location in the Docker container
     _update_encryption_path(config_path, config, local_deps)
-    # Rewrite priority path, so it points to the correct location in the Docker container
-    _update_priority_path(config_path, config, local_deps)
     # Rewrite checkpointer path, so it points to the correct location in the Docker container
     _update_checkpointer_path(config_path, config, local_deps)
     # Rewrite HTTP app path, so it points to the correct location in the Docker container

libs/cli/langgraph_cli/deploy.py

@@ -12,7 +12,7 @@ from collections.abc import Callable, Mapping, Sequence
 from contextlib import contextmanager
 from dataclasses import asdict, dataclass, field
 from datetime import datetime, timezone
-from typing import Generic, Protocol, TypeVar
+from typing import Protocol, TypeVar
 
 import click
 import click.exceptions
@@ -26,6 +26,7 @@ from langgraph_cli.dependency_tracking import find_tracked_packages
 from langgraph_cli.docker import build_docker_image, can_build_locally
 from langgraph_cli.exec import CommandRunner, Runner, subp_exec
 from langgraph_cli.host_backend import (
+    MAX_PAGE_SIZE,
     ControlPlaneEndpoints,
     HostBackendClient,
     HostBackendError,
@@ -182,15 +183,12 @@ class Listener:
         )
         return cls(
             identifier,
-            str(resource.get("compute_id") or ""),
+            str(resource.get("compute_id", "")),
             tuple(str(namespace) for namespace in namespaces)
             if isinstance(namespaces, list)
             else (),
         )
 
-    def cells(self) -> tuple[str | None, ...]:
-        return (self.id, self.compute_id, ", ".join(self.namespaces))
-
 
 @dataclass(frozen=True, slots=True)
 class Unplaced:
@@ -233,6 +231,15 @@ class RequestedPlacement:
     def requested(self) -> bool:
         return self.listener_id is not None or self.k8s_namespace is not None
 
+    def ensure_not_requested(self, deployment_id: str) -> None:
+        if self.requested:
+            raise click.UsageError(
+                "Listener and namespace are fixed when a deployment is created. "
+                f"Deployment {deployment_id} already exists, so drop --listener-id "
+                "and --k8s-namespace, or create a new deployment with a different "
+                "--name."
+            )
+
     def on(self, listener: Listener) -> Placement:
         return OnListener(listener.id, self._namespace(listener))
 
@@ -278,6 +285,8 @@ def _describe_listeners(listeners: Sequence[Listener]) -> str:
     ]
     if len(listeners) > len(shown):
         lines.append(f"  ... and {len(listeners) - len(shown)} more")
+    if len(listeners) == MAX_PAGE_SIZE:
+        lines.append(f"  (only the first {MAX_PAGE_SIZE} listeners were read)")
     return "\n".join(lines)
 
 
@@ -499,9 +508,16 @@ def _source_of(resource: object) -> str | None:
 def find_deployment_by_name(
     client: HostBackendClient, name: str
 ) -> ExistingDeployment | None:
-    for resource in client.list_deployments(name=name, name_contains=name):
+    listed = client.list_deployments(name=name, name_contains=name, limit=MAX_PAGE_SIZE)
+    for resource in listed:
         if resource.get("name") == name and resource.get("id"):
             return ExistingDeployment(str(resource["id"]), _source_of(resource))
+    if len(listed) >= MAX_PAGE_SIZE:
+        raise click.ClickException(
+            "This workspace has more deployments than the CLI can search, so it "
+            f"cannot tell whether '{name}' already exists. Pass --deployment-id to "
+            "update an existing deployment."
+        )
     return None
 
 
@@ -576,96 +592,103 @@ def _validate_prebuilt_image(
     _get_emitter().info(f"Image is available for {_DEPLOYMENT_PLATFORM}")
 
 
-Resource = Mapping[str, object]
-RowT = TypeVar("RowT")
-
-
-@dataclass(frozen=True, slots=True)
-class Table(Generic[RowT]):
-    headers: tuple[str, ...]
-    cells: Callable[[RowT], tuple[str | None, ...]]
-
-    def render(self, rows: Sequence[RowT]) -> str:
-        grid = [
-            self.headers,
-            *(tuple(cell or "-" for cell in self.cells(row)) for row in rows),
-        ]
-        widths = [max(map(len, column)) for column in zip(*grid, strict=True)]
-        rule = tuple("-" * width for width in widths)
-        return "\n".join(
-            "  ".join(
-                cell.ljust(width) for cell, width in zip(line, widths, strict=True)
-            )
-            for line in (grid[0], rule, *grid[1:])
-        )
-
-
-def _text(resource: Resource, key: str) -> str | None:
-    value = resource.get(key)
-    return str(value) if value else None
-
-
-def _deployment_url(deployment: Resource) -> str | None:
+def _extract_deployment_url(deployment: dict[str, object]) -> str:
     source_config = deployment.get("source_config")
-    custom_url = (
-        source_config.get("custom_url") if isinstance(source_config, Mapping) else None
-    )
-    return custom_url if isinstance(custom_url, str) and custom_url else None
+    if isinstance(source_config, dict):
+        custom_url = source_config.get("custom_url")
+        if isinstance(custom_url, str) and custom_url:
+            return custom_url
+    return "-"
 
 
-def _with_replaced_status(revisions: Sequence[Resource]) -> list[Resource]:
-    live_index = next(
+def format_deployments_table(deployments: Sequence[dict[str, object]]) -> str:
+    headers = ("Deployment ID", "Deployment Name", "Deployment URL")
+    rows = [
         (
-            index
-            for index, revision in enumerate(revisions)
-            if revision.get("status") == "DEPLOYED"
-        ),
-        None,
-    )
-    return [
-        {**revision, "status": "REPLACED"}
-        if revision.get("status") == "DEPLOYED" and index != live_index
-        else revision
-        for index, revision in enumerate(revisions)
+            str(deployment.get("id", "-") or "-"),
+            str(deployment.get("name", "-") or "-"),
+            _extract_deployment_url(deployment),
+        )
+        for deployment in deployments
+    ]
+    widths = [
+        max(len(headers[index]), *(len(row[index]) for row in rows))
+        for index in range(len(headers))
     ]
 
+    def format_row(row: Sequence[str]) -> str:
+        return "  ".join(value.ljust(widths[index]) for index, value in enumerate(row))
 
-@dataclass(frozen=True, slots=True)
-class DeploymentRow:
-    id: str
-    name: str | None
-    url: str | None
+    lines = [format_row(headers), format_row(tuple("-" * width for width in widths))]
+    lines.extend(format_row(row) for row in rows)
+    return "\n".join(lines)
 
-    @classmethod
-    def from_resource(cls, deployment: Resource) -> "DeploymentRow":
-        identifier = _text(deployment, "id")
-        if identifier is None:
-            raise HostBackendError(
-                "The control plane returned a deployment without an id."
+
+def _extract_listener_namespaces(listener: dict[str, object]) -> str:
+    compute_config = listener.get("compute_config")
+    namespaces = (
+        compute_config.get("k8s_namespaces")
+        if isinstance(compute_config, dict)
+        else None
+    )
+    if isinstance(namespaces, list) and namespaces:
+        return ", ".join(str(namespace) for namespace in namespaces)
+    return "-"
+
+
+def format_listeners_table(listeners: Sequence[dict[str, object]]) -> str:
+    headers = ("Listener ID", "Compute ID", "Namespaces")
+    rows = [
+        (
+            str(listener.get("id", "-") or "-"),
+            str(listener.get("compute_id", "-") or "-"),
+            _extract_listener_namespaces(listener),
+        )
+        for listener in listeners
+    ]
+    widths = [
+        max(len(headers[index]), *(len(row[index]) for row in rows))
+        for index in range(len(headers))
+    ]
+
+    def format_row(row: Sequence[str]) -> str:
+        return "  ".join(value.ljust(widths[index]) for index, value in enumerate(row))
+
+    lines = [format_row(headers), format_row(tuple("-" * width for width in widths))]
+    lines.extend(format_row(row) for row in rows)
+    return "\n".join(lines)
+
+
+def format_revisions_table(revisions: Sequence[dict[str, object]]) -> str:
+    headers = ("Revision ID", "Status", "Created At")
+    latest_deployed_seen = False
+    rows = []
+    for revision in revisions:
+        status = str(revision.get("status", "-") or "-")
+        if status == "DEPLOYED":
+            if latest_deployed_seen:
+                status = "REPLACED"
+            else:
+                latest_deployed_seen = True
+        rows.append(
+            (
+                str(revision.get("id", "-") or "-"),
+                status,
+                str(revision.get("created_at", "-") or "-"),
             )
-        return cls(identifier, _text(deployment, "name"), _deployment_url(deployment))
+        )
 
-    def cells(self) -> tuple[str | None, ...]:
-        return (self.id, self.name, self.url)
+    widths = [
+        max(len(headers[index]), *(len(row[index]) for row in rows))
+        for index in range(len(headers))
+    ]
 
-    def as_json(self) -> dict[str, str | None]:
-        return {"id": self.id, "name": self.name}
+    def format_row(row: Sequence[str]) -> str:
+        return "  ".join(value.ljust(widths[index]) for index, value in enumerate(row))
 
-
-DEPLOYMENTS_TABLE = Table(
-    ("Deployment ID", "Deployment Name", "Deployment URL"), DeploymentRow.cells
-)
-
-LISTENERS_TABLE = Table(("Listener ID", "Compute ID", "Namespaces"), Listener.cells)
-
-REVISIONS_TABLE = Table(
-    ("Revision ID", "Status", "Created At"),
-    lambda revision: (
-        _text(revision, "id"),
-        _text(revision, "status"),
-        _text(revision, "created_at"),
-    ),
-)
+    lines = [format_row(headers), format_row(tuple("-" * width for width in widths))]
+    lines.extend(format_row(row) for row in rows)
+    return "\n".join(lines)
 
 
 def format_timestamp(ts) -> str:
@@ -827,6 +850,7 @@ def _find_deployment(
             lambda c: c.list_deployments(
                 agent_id=selector.agent_id,
                 agent_environment=selector.environment,
+                limit=MAX_PAGE_SIZE,
             ),
         )
         if len(existing) > 1:
@@ -992,15 +1016,20 @@ def _print_deployment_result(
     dashboard_label: str,
     status_url: str | None = None,
 ) -> None:
+    """Print final deployment status and raise on failure."""
     em = _get_emitter()
-    deployment = client.get_deployment(deployment_id)
-    url = _deployment_url(deployment) if isinstance(deployment, Mapping) else None
+    dep_info = client.get_deployment(deployment_id)
+    custom_url = None
+    if isinstance(dep_info, dict):
+        sc = dep_info.get("source_config")
+        if isinstance(sc, dict):
+            custom_url = sc.get("custom_url")
 
     if last_status == "DEPLOYED":
         em.result(
             "succeeded",
             deployment_id=deployment_id,
-            url=url,
+            url=custom_url,
             status_url=status_url,
         )
     elif last_status in ("BUILD_FAILED", "DEPLOY_FAILED", "CREATE_FAILED"):
@@ -1026,28 +1055,15 @@ def _print_deployment_result(
 # ---------------------------------------------------------------------------
 
 
-def _strip_url_scheme(url: str) -> str:
-    """Return a registry reference without a trailing slash or URL scheme."""
-    reference = url.rstrip("/")
-    if "://" in reference:
-        reference = reference.split("//", 1)[1]
-    return reference
-
-
-# Artifact Registry's username for access tokens. Control planes whose registry
-# needs another one return it as `username`.
-_DEFAULT_REGISTRY_USERNAME = "oauth2accesstoken"
-
-
 @contextmanager
-def _docker_config_for_token(registry_host: str, token: str, username: str):
+def _docker_config_for_token(registry_host: str, token: str):
     """Create a temporary Docker config with only the push token.
 
     Yields the path to a temporary config directory that can be passed
     to `docker --config <path>` so that system credential helpers
     (e.g. gcloud) don't interfere with the push token.
     """
-    auth_b64 = base64.b64encode(f"{username}:{token}".encode()).decode()
+    auth_b64 = base64.b64encode(f"oauth2accesstoken:{token}".encode()).decode()
     config_data = {"auths": {registry_host: {"auth": auth_b64}}}
     with tempfile.TemporaryDirectory() as tmpdir:
         with open(os.path.join(tmpdir, "config.json"), "w") as f:
@@ -1061,8 +1077,6 @@ def _docker_config_for_token(registry_host: str, token: str, username: str):
 
 _UPLOAD_TIMEOUT_SECONDS = 300
 _BYTES_PER_MIB = 1_048_576
-# Byte range Cloud Storage signs into upload URLs, up to the 200 MB archive limit.
-_GCS_SIZE_RANGE = f"0,{200 * _BYTES_PER_MIB}"
 
 
 class _ProgressReader:
@@ -1088,24 +1102,12 @@ class _ProgressReader:
         return self._file_size
 
 
-def _upload_source_tarball(
-    signed_url: str,
-    file_path: str,
-    file_size: int,
-    upload_headers: dict[str, str] | None,
-) -> None:
-    """Upload tarball via signed PUT URL with progress display."""
+def _upload_to_gcs(signed_url: str, file_path: str, file_size: int) -> None:
+    """Upload tarball to GCS via signed PUT URL with progress display."""
     import urllib.error
     import urllib.request
 
     em = _get_emitter()
-    # Control planes that return no `upload_headers` sign for the Cloud Storage
-    # size range. Content-Type is a fallback: without one, urllib sends a form
-    # content type, which breaks signatures that cover it.
-    headers = {
-        "Content-Type": "application/gzip",
-        **(upload_headers or {"X-Goog-Content-Length-Range": _GCS_SIZE_RANGE}),
-    }
 
     with open(file_path, "rb") as f:
         reader = _ProgressReader(f, file_size, em)
@@ -1113,7 +1115,11 @@ def _upload_source_tarball(
             signed_url,
             data=reader,
             method="PUT",
-            headers={**headers, "Content-Length": str(file_size)},
+            headers={
+                "Content-Type": "application/gzip",
+                "Content-Length": str(file_size),
+                "X-Goog-Content-Length-Range": "0,209715200",
+            },
         )
         try:
             urllib.request.urlopen(req, timeout=_UPLOAD_TIMEOUT_SECONDS)
@@ -1195,37 +1201,10 @@ class DockerBuildCommand:
             return cls(("docker", "build"), ())
         flags: tuple[str, ...] = ("--platform", _DEPLOYMENT_PLATFORM, "--load")
         if not verbose:
-            flags += ("--progress=plain",)
+            flags += ("--progress=quiet",)
         return cls(("docker", "buildx", "build"), flags)
 
 
-def _active_docker_host(runner: CommandRunner) -> str | None:
-    """Return the daemon endpoint of the user's active Docker context.
-
-    None when `DOCKER_HOST` is set, which Docker honors with any config
-    directory. Also None when the lookup fails (for example, `DOCKER_CONTEXT`
-    names a context that doesn't exist) or the context has no Docker endpoint
-    (Docker prints `<no value>`); that keeps Docker's own default in place.
-    """
-    if os.environ.get("DOCKER_HOST"):
-        return None
-    try:
-        stdout, _ = runner.run(
-            subp_exec(
-                "docker",
-                "context",
-                "inspect",
-                "--format",
-                "{{.Endpoints.docker.Host}}",
-                collect=True,
-            )
-        )
-    except (click.exceptions.Exit, OSError):
-        return None
-    host = (stdout or "").strip()
-    return host if "://" in host else None
-
-
 def _docker_argv(docker_config_dir: str | None) -> tuple[str, ...]:
     if docker_config_dir is None:
         return ("docker",)
@@ -1259,13 +1238,17 @@ def _push_image(
     runner: CommandRunner,
     image: str,
     *,
-    docker: tuple[str, ...],
+    docker_config_dir: str | None,
     verbose: bool,
 ) -> None:
     for attempt in range(1, _PUSH_ATTEMPTS + 1):
         try:
             with Progress(message="Pushing...", elapsed=not verbose):
-                runner.run(subp_exec(*docker, "push", image, verbose=verbose))
+                runner.run(
+                    subp_exec(
+                        *_docker_argv(docker_config_dir), "push", image, verbose=verbose
+                    )
+                )
             return
         except click.exceptions.Exit:
             if attempt == _PUSH_ATTEMPTS:
@@ -1334,27 +1317,21 @@ def _run_local_build(
             raise click.ClickException(
                 "Push token response missing token or registry_url"
             )
-        username = push_data.get("username") or _DEFAULT_REGISTRY_USERNAME
         step += 1
 
-        if push_data.get("repository_url"):
-            # The control plane chose the exact repository (an ECR repository
-            # is a single image name, so nothing may be appended to it).
-            repository = _strip_url_scheme(push_data["repository_url"])
-        else:
-            repo_seed = image_name or name or spec.config.parent.name
-            repository = (
-                f"{_strip_url_scheme(registry_url)}/{normalize_name(repo_seed)}"
+        normalized_registry = registry_url.rstrip("/")
+        if "://" in normalized_registry:
+            normalized_registry = normalized_registry.split("//", 1)[1]
+        repo_seed = image_name or name or spec.config.parent.name
+        remote_image = str(
+            ImageReference(
+                f"{normalized_registry}/{normalize_name(repo_seed)}",
+                tag,
             )
-        remote_image = str(ImageReference(repository, tag))
-        registry_host = repository.split("/")[0]
+        )
+        registry_host = normalized_registry.split("/")[0]
 
-        with _docker_config_for_token(registry_host, deployment_token, username) as cfg:
-            # A config directory has no current context, so Docker would fall
-            # back to /var/run/docker.sock; keep using the daemon the build used.
-            docker_host = _active_docker_host(runner)
-            host_args = ("--host", docker_host) if docker_host else ()
-            docker = (*_docker_argv(cfg), *host_args)
+        with _docker_config_for_token(registry_host, deployment_token) as cfg:
             _log_deploy_step(step, f"Logging into {registry_host}")
             token_input = (
                 deployment_token
@@ -1363,10 +1340,10 @@ def _run_local_build(
             )
             runner.run(
                 subp_exec(
-                    *docker,
+                    *_docker_argv(cfg),
                     "login",
                     "-u",
-                    username,
+                    "oauth2accesstoken",
                     "--password-stdin",
                     registry_host,
                     input=token_input,
@@ -1379,7 +1356,7 @@ def _run_local_build(
             runner.run(
                 subp_exec("docker", "tag", image_to_push, remote_image, verbose=verbose)
             )
-            _push_image(runner, remote_image, docker=docker, verbose=verbose)
+            _push_image(runner, remote_image, docker_config_dir=cfg, verbose=verbose)
         step += 1
 
         resolved_image = _resolve_pushed_image_digest(
@@ -1433,9 +1410,7 @@ def _run_remote_build(
         step += 1
 
         _log_deploy_step(step, "Uploading source")
-        _upload_source_tarball(
-            signed_url, archive_path, file_size, upload_data.get("upload_headers")
-        )
+        _upload_to_gcs(signed_url, archive_path, file_size)
     step += 1
 
     _log_deploy_step(step, "Triggering remote build")
@@ -1552,14 +1527,6 @@ def _resolve_or_create(
             secrets=ctx.secrets,
         )
     except HostBackendError as err:
-        if err.status_code == 400 and err.detail == (
-            "Scale to zero deployments are not supported in AWS environments"
-        ):
-            raise HostBackendError(
-                f"{err.message}\nUse --deployment-type dev instead.",
-                status_code=err.status_code,
-                detail=err.detail,
-            ) from None
         if _needs_a_listener(err):
             raise ListenerRequiredError(
                 "The image has to come from a registry you manage, so re-run with "
@@ -1680,72 +1647,10 @@ class PublishedImage:
 ImageSource = BuildAndPush | PublishedImage
 
 
-def _resource_spec(image_pull_secrets: tuple[str, ...]) -> Mapping[str, object]:
-    if not image_pull_secrets:
-        return _OPERATOR_DEFAULT_RESOURCE_SPEC
-    return {
-        "image_pull_secrets": [{"name": name} for name in image_pull_secrets],
-    }
-
-
-# Mirrors the control plane's own LocalObjectReference.name validation (a
-# Kubernetes DNS subdomain), so a bad secret name is rejected here instead of
-# after a build and push.
-_K8S_SECRET_NAME_RE = re.compile(
-    r"^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$"
-)
-
-
-@dataclass(frozen=True, slots=True)
-class CreateOnlySettings:
-    """Options for an external-image deployment that only apply when
-    creating one, never when updating an existing deployment."""
-
-    placement: RequestedPlacement
-    image_pull_secrets: tuple[str, ...] = ()
-
-    def __post_init__(self) -> None:
-        for name in self.image_pull_secrets:
-            if len(name) > 253 or not _K8S_SECRET_NAME_RE.match(name):
-                raise click.UsageError(
-                    f"--image-pull-secret {name!r} is not a valid Kubernetes "
-                    "secret name (lowercase alphanumeric characters, '-', or "
-                    "'.' only, max 253 characters)."
-                )
-
-    @property
-    def requested(self) -> bool:
-        return self.placement.requested or bool(self.image_pull_secrets)
-
-    def ensure_creatable(self, push_to: str | None, image_uri: str | None) -> None:
-        if push_to is None and image_uri is None and self.requested:
-            raise click.UsageError(
-                "--listener-id, --k8s-namespace, and --image-pull-secret only "
-                "apply when creating a deployment with --push-to or --image-uri."
-            )
-
-    def ensure_not_existing(self, deployment_id: str) -> None:
-        if self.placement.requested:
-            raise click.UsageError(
-                "Listener and namespace are fixed when a deployment is "
-                f"created. Deployment {deployment_id} already exists, so "
-                "drop --listener-id and --k8s-namespace, or create a new "
-                "deployment with a different --name."
-            )
-        if self.image_pull_secrets:
-            raise click.UsageError(
-                "langgraph deploy does not update image pull secrets on an "
-                f"existing deployment. Deployment {deployment_id} already "
-                "exists, so drop --image-pull-secret and update resource_spec "
-                "through the API or the LangSmith UI instead, or create a "
-                "new deployment with a different --name."
-            )
-
-
 @dataclass(frozen=True, slots=True)
 class CustomerRegistrySource:
     image: ImageSource
-    create_only: CreateOnlySettings
+    requested_placement: RequestedPlacement
 
     def run(self, ctx: DeployContext) -> DeployOutcome:
         if isinstance(ctx.selector, ById):
@@ -1767,7 +1672,7 @@ class CustomerRegistrySource:
         self, ctx: DeployContext, existing: ExistingDeployment, step: int
     ) -> DeployOutcome:
         _ensure_customer_registry_source(existing)
-        self.create_only.ensure_not_existing(existing.id)
+        self.requested_placement.ensure_not_requested(existing.id)
         image_uri, step = self._publish(ctx, step)
         _log_deploy_step(step, f"Updating deployment {existing.id}")
         updated = ctx.client.update_deployment(
@@ -1782,7 +1687,7 @@ class CustomerRegistrySource:
         )
 
     def _resolve_placement(self, ctx: DeployContext) -> Placement:
-        requested = self.create_only.placement
+        requested = self.requested_placement
         if requested.listener_id is not None:
             return requested.on(_requested_listener(ctx.client, requested.listener_id))
         if not (ctx.endpoints.is_cloud or requested.requested):
@@ -1811,9 +1716,7 @@ class CustomerRegistrySource:
                 else None,
                 source=_CUSTOMER_REGISTRY_SOURCE,
                 source_config={
-                    "resource_spec": _resource_spec(
-                        self.create_only.image_pull_secrets
-                    ),
+                    "resource_spec": _OPERATOR_DEFAULT_RESOURCE_SPEC,
                     **placement.source_config(),
                 },
                 source_revision_config={"image_uri": image_uri},
@@ -1854,7 +1757,7 @@ class CustomerRegistrySource:
                 _build_image(runner, ctx.spec, image, verbose=ctx.verbose)
             step += 1
             _log_deploy_step(step, f"Pushing image {image}")
-            _push_image(runner, image, docker=_docker_argv(None), verbose=ctx.verbose)
+            _push_image(runner, image, docker_config_dir=None, verbose=ctx.verbose)
             step += 1
             digest = _resolve_pushed_image_digest(
                 runner, remote_image=image, docker_config_dir=None, verbose=ctx.verbose
@@ -1907,13 +1810,19 @@ def _select_source(
     tag: str | None,
     remote_build_flag: bool | None,
     placement: RequestedPlacement,
-    image_pull_secrets: tuple[str, ...],
     selector: DeploymentSelector,
 ) -> DeploymentSource:
-    create_only = CreateOnlySettings(placement, image_pull_secrets)
-    create_only.ensure_creatable(push_to, image_uri)
-    if create_only.requested and isinstance(selector, ById):
-        create_only.ensure_not_existing(selector.deployment_id)
+    if push_to is None and image_uri is None and placement.requested:
+        raise click.UsageError(
+            "--listener-id and --k8s-namespace only apply when creating a "
+            "deployment with --push-to or --image-uri."
+        )
+    if placement.requested and isinstance(selector, ById):
+        raise click.UsageError(
+            "Listener and namespace are fixed when a deployment is created, so "
+            "they cannot be set for an existing --deployment-id. Drop them, or "
+            "create a new deployment with --name."
+        )
     if image_uri is not None:
         if push_to is not None:
             raise click.UsageError("--image-uri cannot be combined with --push-to.")
@@ -1925,7 +1834,7 @@ def _select_source(
             raise click.UsageError("--image-uri cannot be combined with --remote.")
         return CustomerRegistrySource(
             image=PublishedImage(_validate_image_uri(image_uri)),
-            create_only=create_only,
+            requested_placement=placement,
         )
     if push_to is not None:
         if remote_build_flag is True:
@@ -1935,7 +1844,7 @@ def _select_source(
             _require_local_docker()
         return CustomerRegistrySource(
             image=BuildAndPush(reference=reference, prebuilt_image=image),
-            create_only=create_only,
+            requested_placement=placement,
         )
     if image and remote_build_flag is True:
         raise click.UsageError("--image cannot be combined with --remote builds.")
@@ -1965,10 +1874,7 @@ def _create_host_backend_client(
     host_url: str | None,
     api_key: str | None,
     env_vars: dict[str, str] | None = None,
-    *,
-    no_input: bool | None = None,
 ) -> HostBackendClient:
-    effective_no_input = _no_input if no_input is None else no_input
     if env_vars is None:
         env_vars = _parse_env_from_config({}, pathlib.Path.cwd() / DEFAULT_CONFIG)
     resolved_api_key = api_key
@@ -1983,7 +1889,7 @@ def _create_host_backend_client(
                 resolved_api_key = val
                 break
     if not resolved_api_key:
-        if effective_no_input:
+        if _no_input:
             raise click.ClickException(
                 "No LangSmith API key found. Set LANGSMITH_API_KEY in the "
                 "environment or .env file."
@@ -2008,8 +1914,6 @@ def _create_host_backend_client(
 def _call_host_backend_with_optional_tenant(
     client: HostBackendClient,
     operation: Callable[[HostBackendClient], _T],
-    *,
-    no_input: bool | None = None,
 ) -> _T:
     """Run *operation*, prompting for a workspace ID on org-scoped 403s.
 
@@ -2018,7 +1922,6 @@ def _call_host_backend_with_optional_tenant(
     in-place so all subsequent calls through the same instance are
     tenant-aware.
     """
-    effective_no_input = _no_input if no_input is None else no_input
     prompted_for_tenant = False
 
     while True:
@@ -2030,7 +1933,7 @@ def _call_host_backend_with_optional_tenant(
                 and err.status_code == 403
                 and "requires workspace specification" in err.message
             ):
-                if effective_no_input:
+                if _no_input:
                     raise click.ClickException(
                         "API key is org-scoped and requires a workspace ID. "
                         "Set LANGSMITH_TENANT_ID in your .env file or "
@@ -2213,13 +2116,11 @@ def _deploy_base_options(
             ),
             click.option(
                 "--deployment-type",
-                type=click.Choice(["serverless", "dedicated", "dev", "prod"]),
-                default="serverless",
+                type=click.Choice(["dev", "prod"]),
+                default="dev",
                 show_default=True,
                 help=(
-                    "Deployment type (used when creating a new deployment): "
-                    "serverless (scale to zero) or dedicated (prod); "
-                    "legacy dev and prod are also accepted. "
+                    "Deployment type (used when creating a new deployment). "
                     "Ignored with --push-to."
                 ),
             ),
@@ -2281,18 +2182,6 @@ def _deploy_base_options(
                     "creating a deployment with --push-to or --image-uri."
                 ),
             ),
-            click.option(
-                "--image-pull-secret",
-                "image_pull_secrets",
-                multiple=True,
-                help=(
-                    "Name of a Kubernetes secret (type kubernetes.io/"
-                    "dockerconfigjson) in the deployment's namespace to use for "
-                    "pulling the image from a private registry. Repeat to give "
-                    "more than one. Only used when creating a deployment with "
-                    "--push-to or --image-uri."
-                ),
-            ),
             click.option(
                 "--config",
                 "-c",
@@ -2406,7 +2295,6 @@ def _deploy_cmd(
     image_uri: str | None,
     listener_id: str | None,
     k8s_namespace: str | None,
-    image_pull_secrets: tuple[str, ...],
     tag: str | None,
     base_image: str | None,
     install_command: str | None,
@@ -2483,7 +2371,6 @@ def _deploy_cmd(
         tag=tag,
         remote_build_flag=remote_build_flag,
         placement=RequestedPlacement(listener_id, k8s_namespace),
-        image_pull_secrets=image_pull_secrets,
         selector=selector,
     )
 
@@ -2510,9 +2397,7 @@ def _deploy_cmd(
             ),
             verbose=verbose,
             selector=selector,
-            deployment_type={"serverless": "dev_zero", "dedicated": "prod"}.get(
-                deployment_type, deployment_type
-            ),
+            deployment_type=deployment_type,
             secrets=secrets,
             tracked_packages=tracked_packages,
         )
@@ -2586,13 +2471,6 @@ def _deploy_cmd(
     default="",
     help="Only show deployments whose names contain this value.",
 )
-@click.option(
-    "--json",
-    "json_output",
-    is_flag=True,
-    default=False,
-    help="Print the deployments as a JSON array of {id, name} instead of a table.",
-)
 @deploy.command("list", help="[Beta] List LangSmith Deployments.")
 def deploy_list(
     api_key: str | None,
@@ -2600,13 +2478,11 @@ def deploy_list(
     name_contains: str,
     agent_id: str | None,
     environment: str | None,
-    json_output: bool,
 ) -> None:
     if agent_id is not None or environment is not None:
         click.secho(
             "Note: --agent-id and --agent-environment flags are in private beta",
             fg="yellow",
-            err=True,
         )
     if agent_id is not None and not agent_id.strip():
         raise click.UsageError("--agent-id must not be empty.")
@@ -2615,19 +2491,15 @@ def deploy_list(
         filters["agent_id"] = agent_id
     if environment is not None:
         filters["agent_environment"] = environment
-    client = _create_host_backend_client(host_url, api_key, no_input=json_output)
-    resources = _call_host_backend_with_optional_tenant(
+    client = _create_host_backend_client(host_url, api_key)
+    deployments = _call_host_backend_with_optional_tenant(
         client,
         lambda c: c.list_deployments(name_contains=name_contains, **filters),
-        no_input=json_output,
     )
-    deployments = [DeploymentRow.from_resource(resource) for resource in resources]
-    if json_output:
-        click.echo(json_mod.dumps([deployment.as_json() for deployment in deployments]))
-    elif not deployments:
+    if not deployments:
         click.echo("No deployments found.")
-    else:
-        click.echo(DEPLOYMENTS_TABLE.render(deployments))
+        return
+    click.echo(format_deployments_table(deployments))
 
 
 # ---------------------------------------------------------------------------
@@ -2646,13 +2518,6 @@ def deploy_listeners() -> None:
 
 @OPT_HOST_API_KEY
 @OPT_HOST_URL
-@click.option(
-    "--json",
-    "json_output",
-    is_flag=True,
-    default=False,
-    help="Emit the listeners as a JSON array instead of a table.",
-)
 @deploy_listeners.command(
     "list",
     help=(
@@ -2661,23 +2526,15 @@ def deploy_listeners() -> None:
         "--listener-id <id>` to deploy through it."
     ),
 )
-def deploy_listeners_list(
-    api_key: str | None, host_url: str | None, json_output: bool
-) -> None:
-    client = _create_host_backend_client(host_url, api_key, no_input=json_output)
+def deploy_listeners_list(api_key: str | None, host_url: str | None) -> None:
+    client = _create_host_backend_client(host_url, api_key)
     listeners = _call_host_backend_with_optional_tenant(
-        client, lambda c: c.list_listeners(), no_input=json_output
+        client, lambda c: c.list_listeners()
     )
-    if json_output:
-        click.echo(json_mod.dumps(listeners))
-    elif not listeners:
+    if not listeners:
         click.echo("No listeners found for this workspace.")
-    else:
-        click.echo(
-            LISTENERS_TABLE.render(
-                [Listener.from_resource(listener) for listener in listeners]
-            )
-        )
+        return
+    click.echo(format_listeners_table(listeners))
 
 
 # ---------------------------------------------------------------------------
@@ -2720,7 +2577,7 @@ def deploy_revisions_list(
     if not revisions:
         click.echo(f"No revisions found for deployment {deployment_id}.")
         return
-    click.echo(REVISIONS_TABLE.render(_with_replaced_status(revisions)))
+    click.echo(format_revisions_table(revisions))
 
 
 # ---------------------------------------------------------------------------

libs/cli/langgraph_cli/exec.py

@@ -44,8 +44,11 @@ async def subp_exec(
     on_stdout: Callable[[str], bool | None] | None = None,
 ) -> tuple[str | None, str | None]:
     if verbose:
-        # Never echo stdin: it can carry secrets (docker login --password-stdin).
-        print(f"+ {cmd} {' '.join(map(str, args))}")
+        cmd_str = f"+ {cmd} {' '.join(map(str, args))}"
+        if input:
+            print(cmd_str, " <\n", "\n".join(filter(None, input.splitlines())), sep="")
+        else:
+            print(cmd_str)
     if wait:
         await asyncio.sleep(wait)
 

libs/cli/langgraph_cli/host_backend.py

@@ -2,7 +2,6 @@
 
 from __future__ import annotations
 
-from collections.abc import Mapping
 from dataclasses import dataclass
 from typing import Any, Literal
 from urllib.parse import urlparse
@@ -221,51 +220,27 @@ class HostBackendClient:
         *,
         name: str | None = None,
         name_contains: str | None = None,
+        limit: int | None = None,
         agent_id: str | None = None,
         agent_environment: str | None = None,
-    ) -> list[dict[str, object]]:
+    ) -> list[dict[str, Any]]:
         given = (
             ("name", name),
             ("name_contains", name_contains),
+            ("limit", limit),
             ("agent_id", agent_id),
             ("agent_environment", agent_environment),
         )
-        filters = {key: value for key, value in given if value is not None}
-        return self._every_page("/v2/deployments", filters)
-
-    def _every_page(
-        self, path: str, filters: Mapping[str, object]
-    ) -> list[dict[str, object]]:
-        resources: list[dict[str, object]] = []
-        seen_ids: set[object] = set()
-        while True:
-            page = _resources(
-                self._request(
-                    "GET",
-                    path,
-                    params={
-                        **filters,
-                        "limit": MAX_PAGE_SIZE,
-                        "offset": len(resources),
-                    },
-                )
-            )
-            page_ids = {resource.get("id") for resource in page}
-            if page_ids and page_ids <= seen_ids:
-                raise HostBackendError(
-                    f"GET {path} returned the same resources again: this control "
-                    "plane ignores 'offset', so the CLI cannot read past the first page."
-                )
-            seen_ids |= page_ids
-            resources.extend(page)
-            if len(page) < MAX_PAGE_SIZE:
-                return resources
+        params = {key: value for key, value in given if value is not None}
+        return _resources(self._request("GET", "/v2/deployments", params=params))
 
     def get_listener(self, listener_id: str) -> dict[str, Any]:
         return self._request("GET", f"/v2/listeners/{listener_id}")
 
-    def list_listeners(self) -> list[dict[str, object]]:
-        return self._every_page("/v2/listeners", {})
+    def list_listeners(self) -> list[dict[str, Any]]:
+        return _resources(
+            self._request("GET", "/v2/listeners", params={"limit": MAX_PAGE_SIZE})
+        )
 
     def get_deployment(self, deployment_id: str) -> dict[str, Any]:
         return self._request("GET", f"/v2/deployments/{deployment_id}")
@@ -274,22 +249,16 @@ class HostBackendClient:
         return self._request("DELETE", f"/v2/deployments/{deployment_id}")
 
     def request_push_token(self, deployment_id: str) -> dict[str, Any]:
-        # Tells the control plane this client logs in with the returned
-        # `username` and pushes to `repository_url`. LangSmith AWS requires it.
         return self._request(
             "POST",
             f"/v2/deployments/{deployment_id}/push-token",
-            {"supports_registry_username": True},
         )
 
     def request_upload_url(self, deployment_id: str) -> dict[str, Any]:
-        """Get a signed URL for uploading the source tarball."""
-        # Tells the control plane this client sends the returned
-        # `upload_headers` with its upload, which some storage requires.
+        """Get a signed GCS URL for uploading the source tarball."""
         return self._request(
             "POST",
             f"/v2/deployments/{deployment_id}/upload-url",
-            {"supports_upload_headers": True},
         )
 
     def update_deployment(

libs/cli/langgraph_cli/schemas.py

@@ -373,27 +373,6 @@ class EncryptionConfig(TypedDict, total=False):
     """
 
 
-class PriorityConfig(TypedDict, total=False):
-    """Configuration for custom run priority logic.
-
-    Allows you to decide each thread's priority settings with a Python function
-    that the server calls at the first run on a thread with no settings, which
-    can come long after the thread was created."""
-
-    path: str
-    """Required. Path to an instance of the Priority() class that registers an assign function.
-
-    Format: "path/to/file.py:my_priority"
-
-    Example:
-        {
-            "priority": {
-                "path": "./priority.py:my_priority"
-            }
-        }
-    """
-
-
 class CorsConfig(TypedDict, total=False):
     """Specifies Cross-Origin Resource Sharing (CORS) rules for your server.
 
@@ -774,13 +753,6 @@ class Config(TypedDict, total=False):
     Allows you to implement custom encryption for sensitive data stored in the database.
     """
 
-    priority: PriorityConfig | None
-    """Optional. Custom run priority config, including the path to your Python priority logic.
-
-    Allows you to decide each thread's priority settings at the first run on a thread with no settings,
-    which can come long after the thread was created.
-    """
-
     http: HttpConfig | None
     """Optional. Configuration for the built-in HTTP server, controlling which custom routes are exposed
     and how cross-origin requests are handled.
@@ -812,7 +784,6 @@ __all__ = [
     "CheckpointerConfig",
     "AuthConfig",
     "EncryptionConfig",
-    "PriorityConfig",
     "HttpConfig",
     "MiddlewareOrders",
     "Distros",

libs/cli/langgraph_cli/uv_lock.py

@@ -910,7 +910,6 @@ def python_config_to_docker_uv_lock(
     for section, key in [
         ("auth", "path"),
         ("encryption", "path"),
-        ("priority", "path"),
         ("checkpointer", "path"),
         ("http", "app"),
     ]:

libs/cli/schemas/schema.json

@@ -196,17 +196,6 @@
                 }
               ]
             },
-            "priority": {
-              "anyOf": [
-                {
-                  "$ref": "#/$defs/PriorityConfig"
-                },
-                {
-                  "type": "null"
-                }
-              ],
-              "description": "Optional. Custom run priority config, including the path to your Python priority logic.\n\nAllows you to decide each thread's priority settings at the first run on a thread with no settings,\nwhich can come long after the thread was created.\n"
-            },
             "source": {
               "anyOf": [
                 {
@@ -449,17 +438,6 @@
                 }
               ]
             },
-            "priority": {
-              "anyOf": [
-                {
-                  "$ref": "#/$defs/PriorityConfig"
-                },
-                {
-                  "type": "null"
-                }
-              ],
-              "description": "Optional. Custom run priority config, including the path to your Python priority logic.\n\nAllows you to decide each thread's priority settings at the first run on a thread with no settings,\nwhich can come long after the thread was created.\n"
-            },
             "source": {
               "$ref": "#/$defs/UvSource"
             },
@@ -688,17 +666,6 @@
                 }
               ]
             },
-            "priority": {
-              "anyOf": [
-                {
-                  "$ref": "#/$defs/PriorityConfig"
-                },
-                {
-                  "type": "null"
-                }
-              ],
-              "description": "Optional. Custom run priority config, including the path to your Python priority logic.\n\nAllows you to decide each thread's priority settings at the first run on a thread with no settings,\nwhich can come long after the thread was created.\n"
-            },
             "source": {
               "anyOf": [
                 {
@@ -1203,18 +1170,6 @@
       },
       "required": []
     },
-    "PriorityConfig": {
-      "title": "PriorityConfig",
-      "description": "Configuration for custom run priority logic.\n\nAllows you to decide each thread's priority settings with a Python function\nthat the server calls at the first run on a thread with no settings, which\ncan come long after the thread was created.",
-      "type": "object",
-      "properties": {
-        "path": {
-          "type": "string",
-          "description": "Required. Path to an instance of the Priority() class that registers an assign function.\n"
-        }
-      },
-      "required": []
-    },
     "UvSource": {
       "title": "UvSource",
       "description": "Deployment source rooted at a uv project or workspace.",

libs/cli/schemas/schema.v0.json

@@ -196,17 +196,6 @@
                 }
               ]
             },
-            "priority": {
-              "anyOf": [
-                {
-                  "$ref": "#/$defs/PriorityConfig"
-                },
-                {
-                  "type": "null"
-                }
-              ],
-              "description": "Optional. Custom run priority config, including the path to your Python priority logic.\n\nAllows you to decide each thread's priority settings at the first run on a thread with no settings,\nwhich can come long after the thread was created.\n"
-            },
             "source": {
               "anyOf": [
                 {
@@ -449,17 +438,6 @@
                 }
               ]
             },
-            "priority": {
-              "anyOf": [
-                {
-                  "$ref": "#/$defs/PriorityConfig"
-                },
-                {
-                  "type": "null"
-                }
-              ],
-              "description": "Optional. Custom run priority config, including the path to your Python priority logic.\n\nAllows you to decide each thread's priority settings at the first run on a thread with no settings,\nwhich can come long after the thread was created.\n"
-            },
             "source": {
               "$ref": "#/$defs/UvSource"
             },
@@ -688,17 +666,6 @@
                 }
               ]
             },
-            "priority": {
-              "anyOf": [
-                {
-                  "$ref": "#/$defs/PriorityConfig"
-                },
-                {
-                  "type": "null"
-                }
-              ],
-              "description": "Optional. Custom run priority config, including the path to your Python priority logic.\n\nAllows you to decide each thread's priority settings at the first run on a thread with no settings,\nwhich can come long after the thread was created.\n"
-            },
             "source": {
               "anyOf": [
                 {
@@ -1203,18 +1170,6 @@
       },
       "required": []
     },
-    "PriorityConfig": {
-      "title": "PriorityConfig",
-      "description": "Configuration for custom run priority logic.\n\nAllows you to decide each thread's priority settings with a Python function\nthat the server calls at the first run on a thread with no settings, which\ncan come long after the thread was created.",
-      "type": "object",
-      "properties": {
-        "path": {
-          "type": "string",
-          "description": "Required. Path to an instance of the Priority() class that registers an assign function.\n"
-        }
-      },
-      "required": []
-    },
     "UvSource": {
       "title": "UvSource",
       "description": "Deployment source rooted at a uv project or workspace.",

libs/cli/tests/unit_tests/cli/test_cli.py

@@ -2,12 +2,10 @@ import json
 import pathlib
 import re
 import shutil
-import sys
 import tempfile
 import textwrap
 from contextlib import contextmanager
 from pathlib import Path
-from unittest.mock import MagicMock
 
 import click
 from click.testing import CliRunner
@@ -16,7 +14,6 @@ import langgraph_cli.deploy as deploy_module
 from langgraph_cli.cli import cli, prepare_args_and_stdin
 from langgraph_cli.config import Config, _get_pip_cleanup_lines, validate_config
 from langgraph_cli.docker import DEFAULT_POSTGRES_URI, DockerCapabilities, Version
-from langgraph_cli.host_backend import HostBackendError
 from langgraph_cli.util import clean_empty_lines
 
 FORMATTED_CLEANUP_LINES = _get_pip_cleanup_lines(
@@ -373,32 +370,6 @@ def test_dev_command_requires_ssl_certfile_and_keyfile_together(tmp_path) -> Non
     assert "Both --ssl-certfile and --ssl-keyfile must be provided" in result.output
 
 
-def test_dev_command_passes_priority_to_the_server(tmp_path, monkeypatch) -> None:
-    config_path = tmp_path / "langgraph.json"
-    config_path.write_text(
-        json.dumps(
-            {
-                "dependencies": ["."],
-                "graphs": {"agent": "./agent.py:graph"},
-                "priority": {"path": "./priority.py:priority"},
-            }
-        ),
-        encoding="utf-8",
-    )
-    # The test environment doesn't install langgraph-api, so stand in for its server.
-    server = MagicMock()
-    monkeypatch.setitem(sys.modules, "langgraph_api.cli", server)
-    # dev appends the working directory and its dependencies to sys.path.
-    monkeypatch.setattr(sys, "path", list(sys.path))
-
-    result = CliRunner().invoke(cli, ["dev", "--config", str(config_path)])
-
-    assert result.exit_code == 0, result.output
-    assert server.run_server.call_args.kwargs["priority"] == {
-        "path": "./priority.py:priority"
-    }
-
-
 def test_deploy_list_command(monkeypatch) -> None:
     runner = CliRunner()
     captured: dict[str, str] = {}
@@ -482,177 +453,6 @@ def test_deploy_list_command_no_results(monkeypatch) -> None:
     assert result.output.strip() == "No deployments found."
 
 
-def test_deploy_list_prints_an_aligned_table(monkeypatch) -> None:
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_deployments(self, name_contains: str = ""):
-            return [
-                {
-                    "id": "dep-123",
-                    "name": "alpha",
-                    "source_config": {"custom_url": "https://alpha.example.com"},
-                },
-                {"id": "dep-4567", "name": "beta-agent", "source_config": {}},
-            ]
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    result = CliRunner().invoke(
-        cli,
-        [
-            "deploy",
-            "list",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert result.output.splitlines() == [
-        "Deployment ID  Deployment Name  Deployment URL           ",
-        "-------------  ---------------  -------------------------",
-        "dep-123        alpha            https://alpha.example.com",
-        "dep-4567       beta-agent       -                        ",
-    ]
-
-
-def _deploy_list_json(
-    monkeypatch, deployments: list[dict], *extra_args: str
-) -> click.testing.Result:
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_deployments(
-            self,
-            name_contains: str = "",
-            agent_id: str | None = None,
-            agent_environment: str | None = None,
-        ):
-            return deployments
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-    return CliRunner().invoke(
-        cli,
-        [
-            "deploy",
-            "list",
-            "--json",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-            *extra_args,
-        ],
-    )
-
-
-def test_deploy_list_command_json(monkeypatch) -> None:
-    result = _deploy_list_json(
-        monkeypatch,
-        [
-            {
-                "id": "dep-123",
-                "name": "alpha",
-                "source_config": {"custom_url": "https://alpha.example.com"},
-            },
-            {"id": "dep-456", "name": "beta", "source_config": {}},
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert json.loads(result.stdout) == [
-        {"id": "dep-123", "name": "alpha"},
-        {"id": "dep-456", "name": "beta"},
-    ]
-
-
-def test_deploy_list_json_never_prints_deployment_secrets(monkeypatch) -> None:
-    result = _deploy_list_json(
-        monkeypatch,
-        [
-            {
-                "id": "dep-123",
-                "name": "alpha",
-                "source_config": {"custom_url": None},
-                "secrets": [{"name": "OPENAI_API_KEY", "value": "sk-plain-value"}],
-            }
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert "sk-plain-value" not in result.output
-    assert json.loads(result.stdout) == [{"id": "dep-123", "name": "alpha"}]
-
-
-def test_deploy_list_command_json_no_results(monkeypatch) -> None:
-    result = _deploy_list_json(monkeypatch, [])
-
-    assert result.exit_code == 0, result.output
-    assert json.loads(result.stdout) == []
-
-
-def test_deploy_list_rejects_a_deployment_without_an_id(monkeypatch) -> None:
-    result = _deploy_list_json(monkeypatch, [{"name": "alpha"}])
-
-    assert result.exit_code != 0
-    assert "deployment without an id" in result.output
-
-
-def test_deploy_list_json_keeps_the_agent_note_off_stdout(monkeypatch) -> None:
-    result = _deploy_list_json(
-        monkeypatch,
-        [{"id": "dep-123", "name": "alpha"}],
-        "--agent-id",
-        "customer-support",
-        "--agent-environment",
-        "staging",
-    )
-
-    assert result.exit_code == 0, result.output
-    assert json.loads(result.stdout) == [{"id": "dep-123", "name": "alpha"}]
-    assert "private beta" in result.stderr
-
-
-def test_deploy_list_json_never_prompts_for_a_workspace(monkeypatch) -> None:
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_deployments(self, name_contains: str = ""):
-            raise HostBackendError("requires workspace specification", status_code=403)
-
-        def set_tenant(self, tenant_id: str) -> None:
-            raise AssertionError("must not retry with a prompted tenant with --json")
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-    prompt_calls = []
-    monkeypatch.setattr(
-        click, "prompt", lambda *a, **k: prompt_calls.append((a, k)) or "unreachable"
-    )
-
-    result = CliRunner().invoke(
-        cli,
-        [
-            "deploy",
-            "list",
-            "--json",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert prompt_calls == []
-    assert result.exit_code != 0
-    assert "LANGSMITH_TENANT_ID" in result.output
-
-
 def test_deploy_listeners_list_command(monkeypatch) -> None:
     runner = CliRunner()
     captured: dict[str, str] = {}
@@ -735,199 +535,6 @@ def test_deploy_listeners_list_command_no_results(monkeypatch) -> None:
     assert result.output.strip() == "No listeners found for this workspace."
 
 
-def test_deploy_listeners_list_prints_an_aligned_table(monkeypatch) -> None:
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_listeners(self):
-            return [
-                {
-                    "id": "listener-1",
-                    "compute_id": "prod-cluster",
-                    "compute_config": {"k8s_namespaces": ["agents"]},
-                },
-                {
-                    "id": "listener-22",
-                    "compute_id": "multi",
-                    "compute_config": {"k8s_namespaces": ["agents", "agents-staging"]},
-                },
-                {"id": "listener-3", "compute_id": "", "compute_config": {}},
-                {
-                    "id": "listener-4",
-                    "compute_id": None,
-                    "compute_config": {"k8s_namespaces": ["agents"]},
-                },
-            ]
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    result = CliRunner().invoke(
-        cli,
-        [
-            "deploy",
-            "listeners",
-            "list",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert result.output.splitlines() == [
-        "Listener ID  Compute ID    Namespaces            ",
-        "-----------  ------------  ----------------------",
-        "listener-1   prod-cluster  agents                ",
-        "listener-22  multi         agents, agents-staging",
-        "listener-3   -             -                     ",
-        "listener-4   -             agents                ",
-    ]
-
-
-def test_deploy_listeners_list_rejects_a_listener_without_an_id(monkeypatch) -> None:
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_listeners(self):
-            return [{"compute_id": "prod-cluster"}]
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    result = CliRunner().invoke(
-        cli,
-        [
-            "deploy",
-            "listeners",
-            "list",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert result.exit_code != 0
-    assert "listener without an id" in result.output
-
-
-def test_deploy_listeners_list_command_json(monkeypatch) -> None:
-    runner = CliRunner()
-
-    listeners = [
-        {
-            "id": "listener-1",
-            "compute_id": "prod-cluster",
-            "compute_config": {"k8s_namespaces": ["agents"]},
-        },
-        {
-            "id": "listener-2",
-            "compute_id": "multi-cluster",
-            "compute_config": {"k8s_namespaces": ["agents", "agents-staging"]},
-        },
-    ]
-
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_listeners(self):
-            return listeners
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    result = runner.invoke(
-        cli,
-        [
-            "deploy",
-            "listeners",
-            "list",
-            "--json",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert json.loads(result.output) == listeners
-
-
-def test_deploy_listeners_list_command_json_no_results(monkeypatch) -> None:
-    runner = CliRunner()
-
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_listeners(self):
-            return []
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    result = runner.invoke(
-        cli,
-        [
-            "deploy",
-            "listeners",
-            "list",
-            "--json",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert json.loads(result.output) == []
-
-
-def test_deploy_listeners_list_command_json_org_scoped_403(monkeypatch) -> None:
-    """With --json, an org-scoped 403 must raise cleanly instead of
-    prompting for a workspace ID, which would write to stdout and hang
-    waiting for input that a scripted invocation never provides."""
-    runner = CliRunner()
-
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_listeners(self):
-            raise HostBackendError("requires workspace specification", status_code=403)
-
-        def set_tenant(self, tenant_id: str) -> None:
-            raise AssertionError("must not retry with a prompted tenant with --json")
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    prompt_calls = []
-    monkeypatch.setattr(
-        click, "prompt", lambda *a, **k: prompt_calls.append((a, k)) or "unreachable"
-    )
-
-    result = runner.invoke(
-        cli,
-        [
-            "deploy",
-            "listeners",
-            "list",
-            "--json",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert prompt_calls == [], "must not prompt interactively with --json"
-    assert result.exit_code != 0
-    assert "LANGSMITH_TENANT_ID" in result.output
-
-
 def test_deploy_revisions_list_command(monkeypatch) -> None:
     runner = CliRunner()
     captured: dict[str, str] = {}
@@ -1015,54 +622,6 @@ def test_deploy_revisions_list_command_no_results(monkeypatch) -> None:
     assert result.output.strip() == "No revisions found for deployment dep-123."
 
 
-def test_deploy_revisions_list_marks_older_deployed_revisions_as_replaced(
-    monkeypatch,
-) -> None:
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_revisions(self, deployment_id: str, limit: int = 1):
-            return [
-                {
-                    "id": "rev-3",
-                    "status": "DEPLOYING",
-                    "created_at": "2026-10-20T10:00:00Z",
-                },
-                {
-                    "id": "rev-2",
-                    "status": "DEPLOYED",
-                    "created_at": "2026-10-19T10:00:00Z",
-                },
-                {"id": "rev-1", "status": "DEPLOYED", "created_at": None},
-            ]
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    result = CliRunner().invoke(
-        cli,
-        [
-            "deploy",
-            "revisions",
-            "list",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-            "dep-123",
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert result.output.splitlines() == [
-        "Revision ID  Status     Created At          ",
-        "-----------  ---------  --------------------",
-        "rev-3        DEPLOYING  2026-10-20T10:00:00Z",
-        "rev-2        DEPLOYED   2026-10-19T10:00:00Z",
-        "rev-1        REPLACED   -                   ",
-    ]
-
-
 def test_deploy_revisions_list_command_with_explicit_limit(monkeypatch) -> None:
     runner = CliRunner()
     captured: dict[str, str] = {}

libs/cli/tests/unit_tests/cli/test_deploy_command.py

@@ -52,8 +52,6 @@ ARCHIVE = ("/tmp/src.tgz", 2048, "langgraph.json")
 OBJECT_PATH = "tarballs/src.tgz"
 PLATFORM_FORMAT = "{{.Os}}/{{.Architecture}}"
 DIGESTS_FORMAT = "{{json .RepoDigests}}"
-CONTEXT_HOST_FORMAT = "{{.Endpoints.docker.Host}}"
-CONTEXT_HOST = "unix:///Users/dev/.docker/run/docker.sock"
 NOT_A_CLI_DEPLOYMENT = (
     "push token is only available for 'internal_docker' source deployments"
 )
@@ -95,8 +93,6 @@ class ControlPlaneDouble:
     timeline: list[str]
     existing_deployments: list[dict] = field(default_factory=list)
     push_token_status: int = 200
-    push_token_extra: dict = field(default_factory=dict)
-    upload_url_extra: dict = field(default_factory=dict)
     create_error: str | None = None
     listeners: list[dict] = field(default_factory=list)
     listeners_by_id: dict[str, dict] = field(default_factory=dict)
@@ -112,11 +108,7 @@ class ControlPlaneDouble:
     def _respond(self, request: httpx.Request) -> httpx.Response:
         method, path = request.method, request.url.path
         if (method, path) == ("GET", "/v2/listeners"):
-            offset = int(request.url.params.get("offset", 0))
-            limit = int(request.url.params.get("limit", 20))
-            return httpx.Response(
-                200, json={"resources": self.listeners[offset : offset + limit]}
-            )
+            return httpx.Response(200, json={"resources": self.listeners})
         if method == "GET" and path.startswith("/v2/listeners/"):
             listener_id = path.rsplit("/", 1)[-1]
             if not _looks_like_a_uuid(listener_id):
@@ -155,21 +147,11 @@ class ControlPlaneDouble:
             if self.push_token_status != 200:
                 return httpx.Response(self.push_token_status, text=NOT_A_CLI_DEPLOYMENT)
             return httpx.Response(
-                200,
-                json={
-                    "token": PUSH_TOKEN,
-                    "registry_url": REGISTRY_URL,
-                    **self.push_token_extra,
-                },
+                200, json={"token": PUSH_TOKEN, "registry_url": REGISTRY_URL}
             )
         if path.endswith("/upload-url"):
             return httpx.Response(
-                200,
-                json={
-                    "upload_url": SIGNED_UPLOAD_URL,
-                    "object_path": OBJECT_PATH,
-                    **self.upload_url_extra,
-                },
+                200, json={"upload_url": SIGNED_UPLOAD_URL, "object_path": OBJECT_PATH}
             )
         if method == "PATCH":
             return httpx.Response(200, json={"tenant_id": "tenant-1"})
@@ -204,8 +186,6 @@ class DockerCommand:
 class DockerDouble:
     timeline: list[str]
     failing_pushes: int = 0
-    context_lookup_fails: bool = False
-    context_host: str = CONTEXT_HOST
     builds: list[dict] = field(default_factory=list)
     commands: list[DockerCommand] = field(default_factory=list)
 
@@ -249,10 +229,6 @@ class DockerDouble:
         if "push" in args and self.failing_pushes > 0:
             self.failing_pushes -= 1
             raise click.exceptions.Exit(1)
-        if CONTEXT_HOST_FORMAT in args:
-            if self.context_lookup_fails:
-                raise click.exceptions.Exit(1)
-            return f"{self.context_host}\n", None
         if PLATFORM_FORMAT in args:
             return "linux/amd64\n", None
         if DIGESTS_FORMAT in args:
@@ -262,8 +238,6 @@ class DockerDouble:
 
     @staticmethod
     def _verb(args: tuple[str, ...]) -> str:
-        if CONTEXT_HOST_FORMAT in args:
-            return "inspect-context"
         if PLATFORM_FORMAT in args:
             return "inspect-platform"
         if DIGESTS_FORMAT in args:
@@ -286,7 +260,7 @@ class DeployProject:
     control_plane: ControlPlaneDouble
     docker: DockerDouble
     timeline: list[str]
-    uploads: list[tuple[str, str, int, dict[str, str] | None]]
+    uploads: list[tuple[str, str, int]]
 
     def run(self, *args: str, host_url: str = CONTROL_PLANE_URL) -> Result:
         return CliRunner().invoke(
@@ -312,32 +286,22 @@ def deploy_project(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> DeployPro
         json.dumps({"graphs": {"agent": "agent.py:graph"}, "dependencies": ["."]})
     )
     monkeypatch.chdir(tmp_path)
-    for name in (
-        "LANGSMITH_TENANT_ID",
-        "LANGSMITH_ENDPOINT",
-        "LANGGRAPH_HOST_URL",
-        "DOCKER_HOST",
-    ):
+    for name in ("LANGSMITH_TENANT_ID", "LANGSMITH_ENDPOINT", "LANGGRAPH_HOST_URL"):
         monkeypatch.delenv(name, raising=False)
 
     timeline: list[str] = []
     control_plane = ControlPlaneDouble(timeline)
     docker = DockerDouble(timeline)
-    uploads: list[tuple[str, str, int, dict[str, str] | None]] = []
+    uploads: list[tuple[str, str, int]] = []
 
     @contextmanager
     def fake_create_archive(config_path: Path, config: dict) -> Iterator[tuple]:
         timeline.append("create_archive")
         yield ARCHIVE
 
-    def fake_upload(
-        signed_url: str,
-        file_path: str,
-        file_size: int,
-        upload_headers: dict[str, str] | None,
-    ) -> None:
+    def fake_upload(signed_url: str, file_path: str, file_size: int) -> None:
         timeline.append("upload_archive")
-        uploads.append((signed_url, file_path, file_size, upload_headers))
+        uploads.append((signed_url, file_path, file_size))
 
     monkeypatch.setattr(deploy_module, "_no_input", False)
     monkeypatch.setattr(deploy_module, "_emitter", None)
@@ -355,48 +319,10 @@ def deploy_project(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> DeployPro
     )
     monkeypatch.setattr(deploy_module.platform, "machine", lambda: "x86_64")
     monkeypatch.setattr(archive_module, "create_archive", fake_create_archive)
-    monkeypatch.setattr(deploy_module, "_upload_source_tarball", fake_upload)
+    monkeypatch.setattr(deploy_module, "_upload_to_gcs", fake_upload)
     return DeployProject(control_plane, docker, timeline, uploads)
 
 
-@pytest.mark.parametrize("build_mode", ["--no-remote", "--remote"])
-@pytest.mark.parametrize(
-    ("detail", "expects_dev_hint"),
-    [
-        ("Scale to zero deployments are not supported in AWS environments", True),
-        ("No eligible cluster is currently available to host this deployment.", False),
-    ],
-)
-def test_create_failure_preserves_backend_error_and_only_hints_for_aws_rejection(
-    deploy_project: DeployProject, build_mode: str, detail: str, expects_dev_hint: bool
-) -> None:
-    deploy_project.control_plane.create_error = detail
-
-    result = deploy_project.run(build_mode)
-
-    assert result.exit_code == 1, result.output
-    assert detail in result.output
-    assert ("Use --deployment-type dev instead." in result.output) is expects_dev_hint
-    assert deploy_project.control_plane.bodies[CREATE_DEPLOYMENT]["source_config"] == {
-        "deployment_type": "dev_zero"
-    }
-    assert deploy_project.timeline == [LIST_DEPLOYMENTS, CREATE_DEPLOYMENT]
-
-
-@pytest.mark.parametrize("build_mode", ["--no-remote", "--remote"])
-def test_aws_serverless_creation_succeeds_when_backend_accepts_it(
-    deploy_project: DeployProject, build_mode: str
-) -> None:
-    result = deploy_project.run(
-        build_mode, host_url="https://aws.api.host.langchain.com"
-    )
-
-    assert result.exit_code == 0, result.output
-    assert deploy_project.control_plane.bodies[CREATE_DEPLOYMENT]["source_config"] == {
-        "deployment_type": "dev_zero"
-    }
-
-
 def test_first_local_deploy_creates_then_builds_pushes_and_updates_in_order(
     deploy_project: DeployProject,
 ) -> None:
@@ -408,7 +334,6 @@ def test_first_local_deploy_creates_then_builds_pushes_and_updates_in_order(
         CREATE_DEPLOYMENT,
         "docker build",
         _push_token(CREATED_ID),
-        "docker inspect-context",
         "docker login",
         "docker tag",
         "docker push",
@@ -418,41 +343,15 @@ def test_first_local_deploy_creates_then_builds_pushes_and_updates_in_order(
     assert "Deployment updated" in result.output
 
 
-@pytest.mark.parametrize(
-    ("deployment_type", "wire_type"),
-    [
-        ("serverless", "dev_zero"),
-        ("dedicated", "prod"),
-        ("dev", "dev"),
-        ("prod", "prod"),
-    ],
-)
-@pytest.mark.parametrize("build_mode", ["--no-remote", "--remote"])
-def test_deployment_type_aliases(
-    deploy_project: DeployProject, deployment_type: str, wire_type: str, build_mode: str
+def test_first_local_deploy_creates_an_internal_docker_deployment(
+    deploy_project: DeployProject,
 ) -> None:
-    result = deploy_project.run(build_mode, "--deployment-type", deployment_type)
+    deploy_project.run("--no-remote")
 
-    assert result.exit_code == 0, result.output
-    assert deploy_project.control_plane.bodies[CREATE_DEPLOYMENT]["source_config"] == {
-        "deployment_type": wire_type
-    }
-
-
-@pytest.mark.parametrize(
-    ("build_mode", "source"),
-    [("--no-remote", "internal_docker"), ("--remote", "internal_source")],
-)
-def test_first_deploy_defaults_to_serverless(
-    deploy_project: DeployProject, build_mode: str, source: str
-) -> None:
-    result = deploy_project.run(build_mode)
-
-    assert result.exit_code == 0, result.output
     assert deploy_project.control_plane.bodies[CREATE_DEPLOYMENT] == {
         "name": "my-app",
-        "source": source,
-        "source_config": {"deployment_type": "dev_zero"},
+        "source": "internal_docker",
+        "source_config": {"deployment_type": "dev"},
         "source_revision_config": {},
         "secrets": [],
     }
@@ -464,7 +363,7 @@ def test_first_deploy_defaults_to_serverless(
         pytest.param(
             "arm64",
             ("docker", "buildx", "build"),
-            ("--platform", "linux/amd64", "--load", "--progress=plain"),
+            ("--platform", "linux/amd64", "--load", "--progress=quiet"),
             id="apple_silicon_cross_builds_for_linux_amd64",
         ),
         pytest.param(
@@ -501,7 +400,7 @@ def test_local_deploy_logs_in_with_the_control_plane_push_token(
 
     login = deploy_project.docker.command("login")
     assert login.args[:2] == ("docker", "--config")
-    assert login.args[-5:] == (
+    assert login.args[3:] == (
         "login",
         "-u",
         "oauth2accesstoken",
@@ -511,95 +410,6 @@ def test_local_deploy_logs_in_with_the_control_plane_push_token(
     assert login.kwargs["input"] == f"{PUSH_TOKEN}\n"
 
 
-def test_local_deploy_logs_in_and_pushes_through_the_active_docker_context(
-    deploy_project: DeployProject,
-) -> None:
-    """The temporary config has no current context, so without the active
-    context's endpoint Docker would push through /var/run/docker.sock."""
-    result = deploy_project.run("--no-remote")
-
-    assert result.exit_code == 0, result.output
-    for verb in ("login", "push"):
-        args = deploy_project.docker.command(verb).args
-        assert args[3:5] == ("--host", CONTEXT_HOST), verb
-
-
-def test_local_deploy_leaves_an_explicit_docker_host_to_docker(
-    deploy_project: DeployProject, monkeypatch: pytest.MonkeyPatch
-) -> None:
-    monkeypatch.setenv("DOCKER_HOST", "tcp://127.0.0.1:2375")
-
-    result = deploy_project.run("--no-remote")
-
-    assert result.exit_code == 0, result.output
-    for verb in ("login", "push"):
-        assert "--host" not in deploy_project.docker.command(verb).args, verb
-
-
-def test_local_deploy_keeps_dockers_default_when_the_context_lookup_fails(
-    deploy_project: DeployProject,
-) -> None:
-    deploy_project.docker.context_lookup_fails = True
-
-    result = deploy_project.run("--no-remote")
-
-    assert result.exit_code == 0, result.output
-    assert "--host" not in deploy_project.docker.command("push").args
-
-
-def test_local_deploy_ignores_a_context_without_a_docker_endpoint(
-    deploy_project: DeployProject,
-) -> None:
-    deploy_project.docker.context_host = "<no value>"
-
-    result = deploy_project.run("--no-remote")
-
-    assert result.exit_code == 0, result.output
-    assert "--host" not in deploy_project.docker.command("push").args
-
-
-def test_local_deploy_tells_the_control_plane_it_honors_registry_usernames(
-    deploy_project: DeployProject,
-) -> None:
-    deploy_project.run("--no-remote")
-
-    assert deploy_project.control_plane.bodies[_push_token(CREATED_ID)] == {
-        "supports_registry_username": True
-    }
-
-
-ECR_REPOSITORY = "123456789012.dkr.ecr.us-east-2.amazonaws.com/lsd/agent-1"
-ECR_PUSH_TOKEN_FIELDS = {"username": "AWS", "repository_url": ECR_REPOSITORY}
-
-
-def test_local_deploy_logs_in_with_the_username_the_control_plane_returns(
-    deploy_project: DeployProject,
-) -> None:
-    deploy_project.control_plane.push_token_extra = ECR_PUSH_TOKEN_FIELDS
-
-    deploy_project.run("--no-remote")
-
-    login = deploy_project.docker.command("login")
-    assert login.args[-5:] == (
-        "login",
-        "-u",
-        "AWS",
-        "--password-stdin",
-        "123456789012.dkr.ecr.us-east-2.amazonaws.com",
-    )
-
-
-def test_local_deploy_pushes_to_exactly_the_returned_repository(
-    deploy_project: DeployProject,
-) -> None:
-    deploy_project.control_plane.push_token_extra = ECR_PUSH_TOKEN_FIELDS
-
-    deploy_project.run("--no-remote")
-
-    tag = deploy_project.docker.command("tag")
-    assert tag.args[-1] == f"{ECR_REPOSITORY}:latest"
-
-
 def test_local_deploy_tags_the_build_into_the_token_registry(
     deploy_project: DeployProject,
 ) -> None:
@@ -648,7 +458,6 @@ def test_prebuilt_image_is_validated_and_pushed_without_a_build(
     assert deploy_project.docker.builds == []
     assert deploy_project.docker.verbs() == [
         "docker inspect-platform",
-        "docker inspect-context",
         "docker login",
         "docker tag",
         "docker push",
@@ -714,9 +523,6 @@ def test_deployment_not_created_by_the_cli_gets_an_actionable_error(
 def test_remote_build_creates_an_internal_source_deployment_and_uploads_the_archive(
     deploy_project: DeployProject,
 ) -> None:
-    upload_headers = {"Content-Type": "application/gzip", "x-ms-blob-type": "BlockBlob"}
-    deploy_project.control_plane.upload_url_extra = {"upload_headers": upload_headers}
-
     result = deploy_project.run("--remote", "--install-command", "yarn install")
 
     assert result.exit_code == 0, result.output
@@ -731,12 +537,7 @@ def test_remote_build_creates_an_internal_source_deployment_and_uploads_the_arch
     assert deploy_project.control_plane.bodies[CREATE_DEPLOYMENT]["source"] == (
         "internal_source"
     )
-    assert deploy_project.control_plane.bodies[_upload_url(CREATED_ID)] == {
-        "supports_upload_headers": True
-    }
-    assert deploy_project.uploads == [
-        (SIGNED_UPLOAD_URL, ARCHIVE[0], ARCHIVE[1], upload_headers)
-    ]
+    assert deploy_project.uploads == [(SIGNED_UPLOAD_URL, ARCHIVE[0], ARCHIVE[1])]
     assert deploy_project.control_plane.bodies[_patch(CREATED_ID)] == {
         "revision_source": "internal_source",
         "source_revision_config": {
@@ -1117,100 +918,6 @@ def test_self_hosted_control_plane_places_when_asked(
     }
 
 
-def test_image_pull_secret_is_included_in_resource_spec_on_create(
-    deploy_project: DeployProject,
-) -> None:
-    result = deploy_project.run(
-        "--push-to",
-        PUSH_REPOSITORY,
-        "--image-pull-secret",
-        "regcred",
-        "--image-pull-secret",
-        "other-secret",
-    )
-
-    assert result.exit_code == 0, result.output
-    assert deploy_project.control_plane.bodies[CREATE_DEPLOYMENT]["source_config"] == {
-        "resource_spec": {
-            "image_pull_secrets": [
-                {"name": "regcred"},
-                {"name": "other-secret"},
-            ],
-        },
-    }
-
-
-def test_image_pull_secret_works_with_image_uri_too(
-    deploy_project: DeployProject,
-) -> None:
-    result = deploy_project.run(
-        "--image-uri", EXTERNAL_DIGEST, "--image-pull-secret", "regcred"
-    )
-
-    assert result.exit_code == 0, result.output
-    assert deploy_project.control_plane.bodies[CREATE_DEPLOYMENT]["source_config"] == {
-        "resource_spec": {"image_pull_secrets": [{"name": "regcred"}]},
-    }
-
-
-def test_image_pull_secret_without_push_to_or_image_uri_is_refused(
-    deploy_project: DeployProject,
-) -> None:
-    result = deploy_project.run("--image-pull-secret", "regcred")
-
-    assert result.exit_code != 0
-    assert "only apply when creating a deployment with --push-to" in result.output
-    assert deploy_project.timeline == []
-
-
-def test_an_invalid_image_pull_secret_name_is_rejected_before_any_docker_work(
-    deploy_project: DeployProject,
-) -> None:
-    result = deploy_project.run(
-        "--push-to", PUSH_REPOSITORY, "--image-pull-secret", "Not_Valid!"
-    )
-
-    assert result.exit_code != 0
-    assert "not a valid Kubernetes" in result.output
-    assert deploy_project.docker.verbs() == []
-    assert deploy_project.timeline == []
-
-
-def test_image_pull_secret_cannot_update_an_existing_deployment(
-    deploy_project: DeployProject,
-) -> None:
-    result = deploy_project.run(
-        "--deployment-id",
-        "dep-1",
-        "--push-to",
-        PUSH_REPOSITORY,
-        "--image-pull-secret",
-        "regcred",
-    )
-
-    assert result.exit_code != 0
-    assert "--image-pull-secret" in result.output
-    assert "dep-1" in result.output
-    assert deploy_project.timeline == []
-
-
-def test_image_pull_secret_cannot_update_a_deployment_found_by_name(
-    deploy_project: DeployProject,
-) -> None:
-    deploy_project.control_plane.existing_deployments = [
-        {"id": "dep-ext", "name": "my-app", "source": "external_docker"}
-    ]
-
-    result = deploy_project.run(
-        "--image-uri", EXTERNAL_DIGEST, "--image-pull-secret", "regcred"
-    )
-
-    assert result.exit_code != 0
-    assert "--image-pull-secret" in result.output
-    assert deploy_project.docker.verbs() == []
-    assert _patch("dep-ext") not in deploy_project.timeline
-
-
 def test_updating_a_deployment_never_looks_up_listeners(
     deploy_project: DeployProject,
 ) -> None:
@@ -1311,16 +1018,14 @@ def test_listener_flags_without_push_to_make_no_call_at_all(
     assert deploy_project.timeline == []
 
 
-def test_listeners_beyond_the_first_page_are_counted(
-    deploy_project: DeployProject,
-) -> None:
+def test_a_truncated_listener_page_says_so(deploy_project: DeployProject) -> None:
     deploy_project.control_plane.listeners = [
         {
             "id": str(uuid.UUID(int=index)),
             "compute_id": "cluster",
             "compute_config": {"k8s_namespaces": ["agents"]},
         }
-        for index in range(101)
+        for index in range(100)
     ]
 
     result = deploy_project.run(
@@ -1328,8 +1033,7 @@ def test_listeners_beyond_the_first_page_are_counted(
     )
 
     assert result.exit_code != 0
-    assert "... and 91 more" in result.output
-    assert "first 100" not in result.output
+    assert "first 100" in result.output
 
 
 def test_a_managed_build_in_a_listener_workspace_points_at_push_to(

libs/cli/tests/unit_tests/test_config.py

@@ -16,7 +16,6 @@ from langgraph_cli.config import (
     config_to_docker,
     default_base_image,
     docker_tag,
-    get_unknown_keys,
     has_disallowed_build_command_content,
     validate_config,
     validate_config_file,
@@ -156,7 +155,6 @@ def test_validate_config():
         "store": None,
         "auth": None,
         "encryption": None,
-        "priority": None,
         "webhooks": None,
         "checkpointer": None,
         "http": None,
@@ -186,7 +184,6 @@ def test_validate_config():
         "store": None,
         "auth": None,
         "encryption": None,
-        "priority": None,
         "webhooks": None,
         "checkpointer": None,
         "http": None,
@@ -1292,109 +1289,6 @@ def test_config_to_docker_python_encryption_formatted():
     )
 
 
-@pytest.mark.parametrize(
-    "path", ["./priority.py:priority", "my_package.priority:priority"]
-)
-def test_config_to_docker_python_priority(path: str):
-    # Test that priority config is kept by validation and isn't an unknown key
-    raw_config = {
-        "python_version": "3.11",
-        "graphs": {"agent": "./agent.py:graph"},
-        "dependencies": ["."],
-        "priority": {"path": path},
-    }
-    validated = validate_config(raw_config)
-
-    assert validated["priority"] == {"path": path}
-    assert get_unknown_keys(raw_config) == []
-
-
-def test_config_to_docker_python_priority_bad_path():
-    # Test that invalid priority path format raises ValueError
-    with pytest.raises(ValueError, match="Invalid priority.path format"):
-        validate_config(
-            {
-                "python_version": "3.11",
-                "graphs": {"agent": "./agent.py:graph"},
-                "dependencies": ["."],
-                "priority": {"path": "./priority.py"},  # Missing :attribute
-            }
-        )
-
-
-@pytest.mark.parametrize("ext", [".ts", ".mts", ".cts", ".js", ".mjs", ".cjs"])
-def test_config_to_docker_python_priority_js_path(ext: str):
-    # Test that a JavaScript priority path is rejected
-    with pytest.raises(ValueError, match="JavaScript priority callbacks"):
-        validate_config(
-            {
-                "python_version": "3.11",
-                "graphs": {"agent": "./agent.py:graph"},
-                "dependencies": ["."],
-                "priority": {"path": f"./priority{ext}:priority"},
-            }
-        )
-
-
-def test_config_to_docker_nodejs_priority():
-    # Test that a Node.js-only project can name a Python priority file
-    actual_docker_stdin, _ = config_to_docker(
-        PATH_TO_CONFIG,
-        validate_config(
-            {
-                "node_version": "20",
-                "graphs": {"agent": "./graphs/agent.js:graph"},
-                "priority": {"path": "./priority.py:priority"},
-            }
-        ),
-        base_image="langchain/langgraphjs-api",
-    )
-    assert (
-        """ENV LANGGRAPH_PRIORITY='{"path": "./priority.py:priority"}'"""
-        in actual_docker_stdin
-    )
-
-
-def test_config_to_docker_python_priority_formatted():
-    # Test that priority config is written to the Docker output with its container path
-    actual_docker_stdin, _ = config_to_docker(
-        PATH_TO_CONFIG,
-        validate_config(
-            {
-                "python_version": "3.11",
-                "dependencies": ["."],
-                "graphs": {"agent": "./graphs/agent.py:graph"},
-                "priority": {"path": "./agent.py:my_priority"},
-            }
-        ),
-        base_image="langchain/langgraph-api",
-    )
-    assert (
-        "ENV LANGGRAPH_PRIORITY="
-        """'{"path": "/deps/outer-unit_tests/unit_tests/agent.py:my_priority"}'"""
-        in actual_docker_stdin
-    )
-
-
-def test_config_to_docker_python_priority_not_in_dependencies():
-    # Test that a priority file outside the dependencies raises ValueError
-    with pytest.raises(
-        ValueError, match="Priority file .* not covered by dependencies"
-    ):
-        config_to_docker(
-            PATH_TO_CONFIG,
-            validate_config(
-                {
-                    "python_version": "3.11",
-                    "dependencies": ["./graphs"],
-                    "graphs": {"agent": "./graphs/agent.py:graph"},
-                    "priority": {"path": "./agent.py:my_priority"},
-                }
-            ),
-            base_image="langchain/langgraph-api",
-        )
-
-
 def test_config_to_docker_nodejs_internal_docker_tag():
     graphs = {"agent": "./graphs/agent.js:graph"}
     actual_docker_stdin, additional_contexts = config_to_docker(
@@ -1837,38 +1731,6 @@ def test_config_to_docker_uv_lock_honors_root_workspace_sources():
         )
 
 
-def test_config_to_docker_uv_lock_rewrites_priority_path():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        tmpdir_path = pathlib.Path(tmpdir)
-        project_root, config_path = _write_uv_lock_workspace(
-            tmpdir_path,
-            agent_sources="[tool.uv.sources]\nshared = { workspace = true }",
-        )
-        (project_root / "libs" / "shared" / "src" / "shared" / "priority.py").touch()
-
-        config = validate_config(
-            {
-                "python_version": "3.11",
-                "graphs": {
-                    "agent": "../../apps/agent/src/agent/graph.py:graph",
-                },
-                "source": {"kind": "uv", "root": "../..", "package": "agent"},
-                "priority": {
-                    "path": "../../libs/shared/src/shared/priority.py:priority"
-                },
-            }
-        )
-        docker, _ = config_to_docker(
-            config_path, config, base_image="langchain/langgraph-api:0.2.47"
-        )
-
-        assert (
-            "ENV LANGGRAPH_PRIORITY="
-            """'{"path": "/deps/workspace/libs/shared/src/shared/priority.py:priority"}'"""
-            in docker
-        )
-
-
 def test_config_to_docker_uv_lock_ignores_unrelated_workspace_package_sources():
     with tempfile.TemporaryDirectory() as tmpdir:
         tmpdir_path = pathlib.Path(tmpdir)

libs/cli/tests/unit_tests/test_deploy_agents.py

@@ -75,7 +75,6 @@ def test_agent_create(deployment_api, tmp_path, monkeypatch):
         "agent_id": "customer-support",
         "agent_environment": "staging",
         "limit": "100",
-        "offset": "0",
     }
     payload = json.loads(requests[1].content)
     assert payload["agent"] == {

libs/cli/tests/unit_tests/test_deploy_helpers.py

@@ -16,7 +16,6 @@ from langgraph_cli.deploy import (
     BuildAndPush,
     ById,
     ByName,
-    CreateOnlySettings,
     CustomerRegistrySource,
     DockerBuildCommand,
     ExistingDeployment,
@@ -33,10 +32,8 @@ from langgraph_cli.deploy import (
     _Emitter,
     _env_without_deployment_name,
     _parse_env_from_config,
-    _print_deployment_result,
     _resolve_env_path,
     _resolve_pushed_image_digest,
-    _resource_spec,
     _select_source,
     _validate_prebuilt_image,
     find_deployment_by_name,
@@ -49,9 +46,7 @@ from langgraph_cli.image_reference import ImageReference
 
 class TestDockerConfigForToken:
     def test_creates_config_json(self):
-        with _docker_config_for_token(
-            "us-docker.pkg.dev", "my-token", "oauth2accesstoken"
-        ) as cfg:
+        with _docker_config_for_token("us-docker.pkg.dev", "my-token") as cfg:
             config_path = os.path.join(cfg, "config.json")
             assert os.path.isfile(config_path)
             with open(config_path) as f:
@@ -59,26 +54,13 @@ class TestDockerConfigForToken:
             expected_auth = base64.b64encode(b"oauth2accesstoken:my-token").decode()
             assert data == {"auths": {"us-docker.pkg.dev": {"auth": expected_auth}}}
 
-    def test_uses_the_given_username(self):
-        with _docker_config_for_token(
-            "123456789012.dkr.ecr.us-east-2.amazonaws.com", "ecr-password", "AWS"
-        ) as cfg:
-            with open(os.path.join(cfg, "config.json")) as f:
-                data = json.load(f)
-        expected_auth = base64.b64encode(b"AWS:ecr-password").decode()
-        assert data["auths"]["123456789012.dkr.ecr.us-east-2.amazonaws.com"] == {
-            "auth": expected_auth
-        }
-
     def test_tempdir_cleaned_up(self):
-        with _docker_config_for_token(
-            "registry.example.com", "tok", "oauth2accesstoken"
-        ) as cfg:
+        with _docker_config_for_token("registry.example.com", "tok") as cfg:
             assert os.path.isdir(cfg)
         assert not os.path.exists(cfg)
 
     def test_different_registries(self):
-        with _docker_config_for_token("gcr.io", "token123", "oauth2accesstoken") as cfg:
+        with _docker_config_for_token("gcr.io", "token123") as cfg:
             with open(os.path.join(cfg, "config.json")) as f:
                 data = json.load(f)
             assert "gcr.io" in data["auths"]
@@ -537,39 +519,6 @@ class TestEmitterTextMode:
         assert "URL: https://app.test" in lines
 
 
-@pytest.mark.parametrize(
-    ("deployment", "expected_url_lines"),
-    [
-        pytest.param(
-            {
-                "id": "dep-1",
-                "source_config": {"custom_url": "https://agent.example.com"},
-            },
-            ["URL: https://agent.example.com"],
-            id="custom_url_is_printed",
-        ),
-        pytest.param(
-            {"id": "dep-1", "source_config": {}}, [], id="no_custom_url_no_line"
-        ),
-    ],
-)
-def test_a_deployed_result_prints_the_deployment_url(
-    capsys, monkeypatch, deployment, expected_url_lines
-):
-    class FakeClient:
-        def get_deployment(self, deployment_id: str) -> dict:
-            return deployment
-
-    monkeypatch.setattr(deploy_mod, "_emitter", None)
-
-    _print_deployment_result(
-        FakeClient(), "dep-1", "DEPLOYED", dashboard_label="Deployment dashboard"
-    )
-
-    lines = [line.strip() for line in capsys.readouterr().out.splitlines()]
-    assert [line for line in lines if line.startswith("URL:")] == expected_url_lines
-
-
 # ---------------------------------------------------------------------------
 # --no-input guard on _create_host_backend_client
 # ---------------------------------------------------------------------------
@@ -644,9 +593,9 @@ class TestDockerBuildCommand:
                 False,
                 DockerBuildCommand(
                     ("docker", "buildx", "build"),
-                    ("--platform", "linux/amd64", "--load", "--progress=plain"),
+                    ("--platform", "linux/amd64", "--load", "--progress=quiet"),
                 ),
-                id="other_hosts_capture_plain_build_logs",
+                id="other_hosts_cross_build_quietly",
             ),
             pytest.param(
                 "arm64",
@@ -672,7 +621,6 @@ class TestSelectSource:
         "tag": None,
         "remote_build_flag": None,
         "placement": RequestedPlacement(),
-        "image_pull_secrets": (),
         "selector": ByName("my-app"),
     }
     REPOSITORY = "registry.example.com/app"
@@ -688,7 +636,7 @@ class TestSelectSource:
                         reference=ImageReference(REPOSITORY, "latest"),
                         prebuilt_image=None,
                     ),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
+                    requested_placement=RequestedPlacement(),
                 ),
                 id="push_to_selects_the_external_source_with_the_default_tag",
             ),
@@ -700,7 +648,7 @@ class TestSelectSource:
                         reference=ImageReference(REPOSITORY, "v2"),
                         prebuilt_image=None,
                     ),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
+                    requested_placement=RequestedPlacement(),
                 ),
                 id="push_to_keeps_a_tag_given_in_the_reference",
             ),
@@ -712,7 +660,7 @@ class TestSelectSource:
                         reference=ImageReference(REPOSITORY, "v3"),
                         prebuilt_image=None,
                     ),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
+                    requested_placement=RequestedPlacement(),
                 ),
                 id="tag_flag_composes_with_push_to",
             ),
@@ -724,7 +672,7 @@ class TestSelectSource:
                         reference=ImageReference(REPOSITORY, "latest"),
                         prebuilt_image="app:dev",
                     ),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
+                    requested_placement=RequestedPlacement(),
                 ),
                 id="prebuilt_image_is_retagged_for_push_to_without_docker_checks",
             ),
@@ -739,35 +687,16 @@ class TestSelectSource:
                         reference=ImageReference(REPOSITORY, "latest"),
                         prebuilt_image=None,
                     ),
-                    create_only=CreateOnlySettings(
-                        RequestedPlacement("listener-1", "agents")
-                    ),
+                    requested_placement=RequestedPlacement("listener-1", "agents"),
                 ),
                 id="push_to_carries_the_requested_placement",
             ),
-            pytest.param(
-                {
-                    "push_to": REPOSITORY,
-                    "image_pull_secrets": ("regcred", "other-secret"),
-                },
-                True,
-                CustomerRegistrySource(
-                    image=BuildAndPush(
-                        reference=ImageReference(REPOSITORY, "latest"),
-                        prebuilt_image=None,
-                    ),
-                    create_only=CreateOnlySettings(
-                        RequestedPlacement(), ("regcred", "other-secret")
-                    ),
-                ),
-                id="push_to_carries_the_image_pull_secrets",
-            ),
             pytest.param(
                 {"image_uri": f"{REPOSITORY}@sha256:abc123"},
                 True,
                 CustomerRegistrySource(
                     image=PublishedImage(f"{REPOSITORY}@sha256:abc123"),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
+                    requested_placement=RequestedPlacement(),
                 ),
                 id="image_uri_selects_the_published_image_source_by_digest",
             ),
@@ -776,7 +705,7 @@ class TestSelectSource:
                 False,
                 CustomerRegistrySource(
                     image=PublishedImage(f"{REPOSITORY}@sha256:abc123"),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
+                    requested_placement=RequestedPlacement(),
                 ),
                 id="image_uri_needs_no_local_docker_and_is_trimmed",
             ),
@@ -788,9 +717,7 @@ class TestSelectSource:
                 False,
                 CustomerRegistrySource(
                     image=PublishedImage(f"{REPOSITORY}@sha256:abc123"),
-                    create_only=CreateOnlySettings(
-                        RequestedPlacement("listener-1", "agents")
-                    ),
+                    requested_placement=RequestedPlacement("listener-1", "agents"),
                 ),
                 id="image_uri_carries_the_requested_placement",
             ),
@@ -879,11 +806,6 @@ class TestSelectSource:
                 "only apply when creating a deployment with --push-to",
                 id="namespace_without_push_to",
             ),
-            pytest.param(
-                {"image_pull_secrets": ("regcred",)},
-                "only apply when creating a deployment with --push-to",
-                id="image_pull_secret_without_push_to",
-            ),
             pytest.param(
                 {"image_uri": REPOSITORY, "push_to": REPOSITORY},
                 "--image-uri cannot be combined with --push-to.",
@@ -1244,7 +1166,6 @@ def test_finding_a_deployment_by_name_narrows_the_search_for_every_server_versio
         "name": "agent",
         "name_contains": "agent",
         "limit": "100",
-        "offset": "0",
     }
     assert found == ExistingDeployment("dep-1", "github")
 
@@ -1272,29 +1193,20 @@ def test_a_server_that_ignores_the_exact_name_filter_never_matches_another_deplo
     assert find_deployment_by_name(client, "brand-new-agent") is None
 
 
-def test_a_deployment_beyond_the_first_page_is_found_by_name():
-    deployments = [
-        *(
-            {"id": f"dep-{index}", "name": f"other-agent-{index}"}
-            for index in range(100)
-        ),
-        {"id": "dep-target", "name": "agent", "source": "external_docker"},
+def test_a_full_page_without_a_match_refuses_to_claim_the_name_is_free():
+    page = [
+        {"id": f"dep-{index}", "name": f"other-agent-{index}"} for index in range(100)
     ]
-
-    def handler(req: httpx.Request) -> httpx.Response:
-        offset = int(req.url.params["offset"])
-        limit = int(req.url.params["limit"])
-        return httpx.Response(
-            200, json={"resources": deployments[offset : offset + limit]}
-        )
-
     client = HostBackendClient(
-        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
+        "https://api.example.com",
+        "key",
+        transport=httpx.MockTransport(
+            lambda req: httpx.Response(200, json={"resources": page})
+        ),
     )
 
-    assert find_deployment_by_name(client, "agent") == ExistingDeployment(
-        "dep-target", "external_docker"
-    )
+    with pytest.raises(click.ClickException, match="--deployment-id"):
+        find_deployment_by_name(client, "brand-new-agent")
 
 
 def test_a_partial_page_without_a_match_means_the_name_is_free():
@@ -1331,7 +1243,7 @@ def test_a_deployment_id_with_listener_flags_is_refused_without_probing_docker(
 
     monkeypatch.setattr(deploy_mod, "can_build_locally", explode)
 
-    with pytest.raises(click.UsageError, match="dep-1"):
+    with pytest.raises(click.UsageError, match="--deployment-id"):
         _select_source(
             push_to="registry.example.com/app",
             image=None,
@@ -1340,77 +1252,10 @@ def test_a_deployment_id_with_listener_flags_is_refused_without_probing_docker(
             tag=None,
             remote_build_flag=None,
             placement=RequestedPlacement(listener_id="listener-1"),
-            image_pull_secrets=(),
             selector=ById("dep-1"),
         )
 
 
-def test_a_deployment_id_with_image_pull_secrets_is_refused_without_probing_docker(
-    monkeypatch,
-):
-    def explode() -> tuple[bool, str | None]:
-        raise AssertionError("docker must not be probed for an argv-only conflict")
-
-    monkeypatch.setattr(deploy_mod, "can_build_locally", explode)
-
-    with pytest.raises(click.UsageError, match="dep-1"):
-        _select_source(
-            push_to="registry.example.com/app",
-            image=None,
-            image_uri=None,
-            image_name=None,
-            tag=None,
-            remote_build_flag=None,
-            placement=RequestedPlacement(),
-            image_pull_secrets=("regcred",),
-            selector=ById("dep-1"),
-        )
-
-
-class TestResourceSpec:
-    def test_no_secrets_keeps_the_operator_default(self):
-        assert _resource_spec(()) == {}
-
-    def test_secrets_become_local_object_references_in_order(self):
-        assert _resource_spec(("regcred", "other-secret")) == {
-            "image_pull_secrets": [
-                {"name": "regcred"},
-                {"name": "other-secret"},
-            ],
-        }
-
-
-class TestCreateOnlySettings:
-    @pytest.mark.parametrize(
-        "name",
-        [
-            pytest.param("Bad_Name", id="uppercase_and_underscore"),
-            pytest.param("", id="empty"),
-            pytest.param("-leading-hyphen", id="leading_hyphen"),
-            pytest.param("a" * 254, id="too_long"),
-        ],
-    )
-    def test_an_invalid_secret_name_is_rejected_up_front(self, name):
-        with pytest.raises(click.UsageError, match="not a valid Kubernetes"):
-            CreateOnlySettings(RequestedPlacement(), (name,))
-
-    def test_a_valid_secret_name_is_accepted(self):
-        CreateOnlySettings(RequestedPlacement(), ("regcred-1.example",))
-
-    def test_ensure_not_existing_mentions_the_api_and_ui_for_pull_secrets(self):
-        settings = CreateOnlySettings(RequestedPlacement(), ("regcred",))
-        with pytest.raises(click.UsageError, match="API or the LangSmith UI"):
-            settings.ensure_not_existing("dep-1")
-
-    def test_ensure_not_existing_keeps_the_placement_message_unchanged(self):
-        settings = CreateOnlySettings(RequestedPlacement(listener_id="listener-1"))
-        with pytest.raises(
-            click.UsageError,
-            match="Listener and namespace are fixed when a deployment is created",
-        ):
-            settings.ensure_not_existing("dep-1")
-
-
 class TestPlacementOnAKnownListener:
     @pytest.mark.parametrize(
         ("request_", "listener", "expected"),
@@ -1458,59 +1303,3 @@ class TestPlacementOnAKnownListener:
     def test_refuses_and_names_the_namespaces(self, request_, listener, message):
         with pytest.raises(click.UsageError, match=message):
             request_.on(listener)
-
-
-DEFAULT_UPLOAD_HEADERS = {
-    "content-type": "application/gzip",
-    "content-length": "7",
-    "x-goog-content-length-range": "0,209715200",
-}
-
-
-@pytest.mark.parametrize(
-    ("upload_headers", "expected"),
-    [
-        pytest.param(None, DEFAULT_UPLOAD_HEADERS, id="missing_sends_defaults"),
-        pytest.param({}, DEFAULT_UPLOAD_HEADERS, id="empty_sends_defaults"),
-        pytest.param(
-            {
-                "content-type": "application/x-gzip",
-                "x-ms-blob-type": "BlockBlob",
-                "content-length": "1",
-            },
-            {
-                "content-type": "application/x-gzip",
-                "x-ms-blob-type": "BlockBlob",
-                "content-length": "7",
-            },
-            id="returned_headers_replace_defaults",
-        ),
-        pytest.param(
-            {"x-ms-blob-type": "BlockBlob"},
-            {
-                "content-type": "application/gzip",
-                "x-ms-blob-type": "BlockBlob",
-                "content-length": "7",
-            },
-            id="returned_headers_keep_a_content_type",
-        ),
-    ],
-)
-def test_source_upload_sends_the_headers_the_signed_url_requires(
-    tmp_path, mocker, upload_headers, expected
-):
-    archive = tmp_path / "source.tar.gz"
-    archive.write_bytes(b"tarball")
-    sent = []
-    mocker.patch(
-        "langgraph_cli.deploy._get_emitter", return_value=MagicMock(json_mode=True)
-    )
-    mocker.patch(
-        "urllib.request.urlopen", side_effect=lambda req, timeout: sent.append(req)
-    )
-
-    deploy_mod._upload_source_tarball(
-        "https://storage.example/signed", str(archive), 7, upload_headers
-    )
-
-    assert {name.lower(): value for name, value in sent[0].header_items()} == expected

libs/cli/tests/unit_tests/test_exec.py

@@ -1,17 +0,0 @@
-import sys
-
-from langgraph_cli.exec import subp_exec
-
-
-async def test_verbose_prints_command_but_not_stdin(capsys):
-    await subp_exec(
-        sys.executable,
-        "-c",
-        "import sys; sys.stdin.read()",
-        input="registry-push-token\n",
-        verbose=True,
-    )
-
-    out = capsys.readouterr().out
-    assert out.startswith(f"+ {sys.executable} -c"), out
-    assert "registry-push-token" not in out, out

libs/cli/tests/unit_tests/test_host_backend.py

@@ -575,7 +575,7 @@ def test_list_listeners_asks_for_a_full_page():
     )
 
     assert c.list_listeners() == [{"id": "listener-1"}]
-    assert seen["url"] == "https://api.example.com/v2/listeners?limit=100&offset=0"
+    assert seen["url"] == "https://api.example.com/v2/listeners?limit=100"
 
 
 @pytest.mark.parametrize(
@@ -602,30 +602,29 @@ def test_is_cloud_recognises_the_managed_control_plane(control_plane_url, expect
     assert endpoints.is_cloud is expected
 
 
-FIRST_PAGE = {"limit": "100", "offset": "0"}
-
-
 @pytest.mark.parametrize(
     ("call", "expected_params"),
     [
         pytest.param(
             lambda c: c.list_deployments(name="agent"),
-            {"name": "agent", **FIRST_PAGE},
+            {"name": "agent"},
             id="exact_name_filters_server_side",
         ),
         pytest.param(
             lambda c: c.list_deployments(name_contains="age"),
-            {"name_contains": "age", **FIRST_PAGE},
+            {"name_contains": "age"},
             id="substring_search_keeps_its_own_parameter",
         ),
         pytest.param(
             lambda c: c.list_deployments(),
-            FIRST_PAGE,
-            id="no_filter_sends_only_the_page",
+            {},
+            id="no_filter_sends_no_parameters",
         ),
         pytest.param(
-            lambda c: c.list_deployments(name="agent", name_contains="agent"),
-            {"name": "agent", "name_contains": "agent", **FIRST_PAGE},
+            lambda c: c.list_deployments(
+                name="agent", name_contains="agent", limit=100
+            ),
+            {"name": "agent", "name_contains": "agent", "limit": "100"},
             id="both_filters_travel_together_for_older_servers",
         ),
     ],
@@ -646,68 +645,6 @@ def test_list_deployments_sends_one_name_filter(call, expected_params):
     assert seen == expected_params
 
 
-@pytest.mark.parametrize(
-    "list_every",
-    [
-        pytest.param(HostBackendClient.list_deployments, id="deployments"),
-        pytest.param(HostBackendClient.list_listeners, id="listeners"),
-    ],
-)
-def test_list_endpoints_read_every_page(list_every):
-    resources = [{"id": f"resource-{index}"} for index in range(101)]
-    offsets: list[str] = []
-
-    def handler(req: httpx.Request) -> httpx.Response:
-        offset = int(req.url.params["offset"])
-        limit = int(req.url.params["limit"])
-        offsets.append(req.url.params["offset"])
-        return httpx.Response(
-            200, json={"resources": resources[offset : offset + limit]}
-        )
-
-    c = HostBackendClient(
-        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
-    )
-
-    assert list_every(c) == resources
-    assert offsets == ["0", "100"]
-
-
-FIRST_PAGE_OF_DEPLOYMENTS = [
-    {"id": f"dep-{index}", "status": "DEPLOYED"} for index in range(100)
-]
-
-
-@pytest.mark.parametrize(
-    "repeated_page",
-    [
-        pytest.param(FIRST_PAGE_OF_DEPLOYMENTS, id="same_page_again"),
-        pytest.param(
-            [
-                {"id": "dep-99", "status": "DEPLOYING"},
-                *FIRST_PAGE_OF_DEPLOYMENTS[:99],
-            ],
-            id="same_deployments_reordered_and_updated",
-        ),
-    ],
-)
-def test_list_deployments_fails_when_the_server_ignores_the_offset(repeated_page):
-    pages = iter([FIRST_PAGE_OF_DEPLOYMENTS, repeated_page])
-
-    def handler(req: httpx.Request) -> httpx.Response:
-        page = next(pages, None)
-        if page is None:
-            return httpx.Response(500, json={"detail": "the guard let paging run on"})
-        return httpx.Response(200, json={"resources": page})
-
-    c = HostBackendClient(
-        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
-    )
-
-    with pytest.raises(HostBackendError, match="ignores 'offset'"):
-        c.list_deployments()
-
-
 @pytest.mark.parametrize(
     ("body", "expected"),
     [

libs/cli/tests/unit_tests/test_util.py

@@ -1,6 +1,11 @@
 from unittest.mock import patch
 
-from langgraph_cli.deploy import Table
+from langgraph_cli.deploy import (
+    _extract_deployment_url,
+    format_deployments_table,
+    format_listeners_table,
+    format_revisions_table,
+)
 from langgraph_cli.util import clean_empty_lines, warn_non_wolfi_distro
 
 
@@ -189,7 +194,96 @@ def test_warn_non_wolfi_distro_does_not_modify_config():
     assert config_copy == original_config  # Config should remain unchanged
 
 
-def test_a_table_without_rows_still_renders_its_headers():
-    table = Table(("Name", "Status"), lambda resource: (None, None))
+def test_extract_deployment_url_uses_custom_url():
+    deployment = {"source_config": {"custom_url": "https://example.com/custom"}}
+    assert _extract_deployment_url(deployment) == "https://example.com/custom"
 
-    assert table.render([]).splitlines() == ["Name  Status", "----  ------"]
+
+def test_extract_deployment_url_defaults_to_dash():
+    assert _extract_deployment_url({"id": "dep-123"}) == "-"
+
+
+def test_format_deployments_table():
+    output = format_deployments_table(
+        [
+            {
+                "id": "dep-123",
+                "name": "alpha",
+                "source_config": {"custom_url": "https://alpha.example.com"},
+            },
+            {
+                "id": "dep-456",
+                "name": "beta",
+                "url": "https://beta.example.com",
+            },
+        ]
+    )
+    assert "Deployment ID" in output
+    assert "Deployment Name" in output
+    assert "Deployment URL" in output
+    assert "dep-123" in output
+    assert "alpha" in output
+    assert "https://alpha.example.com" in output
+    assert "dep-456" in output
+
+
+def test_format_revisions_table():
+    output = format_revisions_table(
+        [
+            {
+                "id": "rev-123",
+                "status": "DEPLOYED",
+                "created_at": "2023-11-09T10:00:00Z",
+            },
+            {
+                "id": "rev-456",
+                "status": "CREATING",
+                "created_at": "2023-11-07T05:31:56Z",
+            },
+            {
+                "id": "rev-789",
+                "status": "DEPLOYED",
+                "created_at": "2023-11-08T10:00:00Z",
+            },
+        ]
+    )
+    assert "Revision ID" in output
+    assert "Status" in output
+    assert "Created At" in output
+    assert "rev-123" in output
+    assert "CREATING" in output
+    assert "2023-11-07T05:31:56Z" in output
+    assert "rev-456" in output
+    assert "rev-789" in output
+    assert "REPLACED" in output
+
+
+def test_format_listeners_table():
+    output = format_listeners_table(
+        [
+            {
+                "id": "listener-1",
+                "compute_id": "prod-cluster",
+                "compute_config": {"k8s_namespaces": ["agents"]},
+            },
+            {
+                "id": "listener-2",
+                "compute_id": "multi-cluster",
+                "compute_config": {"k8s_namespaces": ["agents", "agents-staging"]},
+            },
+            {
+                "id": "listener-3",
+                "compute_id": "broken-cluster",
+            },
+        ]
+    )
+    assert "Listener ID" in output
+    assert "Compute ID" in output
+    assert "Namespaces" in output
+    assert "listener-1" in output
+    assert "prod-cluster" in output
+    assert "agents" in output
+    assert "listener-2" in output
+    assert "agents, agents-staging" in output
+    assert "listener-3" in output
+    assert "broken-cluster" in output

libs/cli/uv-examples/monorepo/uv.lock

@@ -1,5 +1,5 @@
 version = 1
-revision = 5
+revision = 3
 requires-python = ">=3.11"
 
 [manifest]
@@ -52,11 +52,11 @@ wheels = [
 
 [[package]]
 name = "certifi"
-version = "2026.10.19"
+version = "2026.2.25"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/a6/bd/1436c50cc46699de0230fbaacc1d1de7bfec413176099949e9d5112e88f2/certifi-2026.10.19.tar.gz", hash = "sha256:035c1e85572b141bf1c3a3eff0e33a8eb74917522f2559075ff8d2fea780a1ae", size = 137598, upload-time = "2026-10-20T02:24:16.604Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/af/2d/7bf41579a8986e348fa033a31cdd0e4121114f6bce2457e8876010b092dd/certifi-2026.2.25.tar.gz", hash = "sha256:e887ab5cee78ea814d3472169153c2d12cd43b14bd03329a39a9c6e2e80bfba7", size = 155029, upload-time = "2026-02-25T02:54:17.342Z" }
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+    { url = "https://files.pythonhosted.org/packages/9a/3c/c17fb3ca2d9c3acff52e30b309f538586f9f5b9c9cf454f3845fc9af4881/certifi-2026.2.25-py3-none-any.whl", hash = "sha256:027692e4402ad994f1c42e52a4997a9763c646b73e4096e4d5d6db8af1d6f0fa", size = 153684, upload-time = "2026-02-25T02:54:15.766Z" },
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 [[package]]
@@ -267,20 +267,20 @@ wheels = [
 
 [[package]]
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-version = "4.3.0"
+version = "4.2.0"
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     { name = "langchain-core" },
     { name = "ormsgpack" },
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+sdist = { url = "https://files.pythonhosted.org/packages/dc/e1/089c4c9e0a2fec7f883f82ae8e6a727138d50074cfeb6644bc2d13b1019b/langgraph_checkpoint-4.2.0.tar.gz", hash = "sha256:51a593b6bee684b0818e5d6e58e28ab340c6db7794575056ce7bd1b746a84ed7", size = 180239, upload-time = "2026-08-07T20:05:03.756Z" }
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+    { url = "https://files.pythonhosted.org/packages/05/71/3b475f09bd57d3a5649792c66353312b4432afd843f301739dfcebd157f0/langgraph_checkpoint-4.2.0-py3-none-any.whl", hash = "sha256:0547fd228935a0b758865de3a3d6d7a2537c308895d0f9ab092ce9151b5da942", size = 56833, upload-time = "2026-08-07T20:05:02.655Z" },
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 [[package]]
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-version = "3.1.3"
+version = "3.1.1"
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     { name = "langgraph-checkpoint" },
@@ -288,9 +288,9 @@ dependencies = [
     { name = "psycopg" },
     { name = "psycopg-pool" },
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+sdist = { url = "https://files.pythonhosted.org/packages/06/92/1e8959f8cd1b56e672fde3227f6fd642be85af6c5fd662d73921074aa39d/langgraph_checkpoint_postgres-3.1.1.tar.gz", hash = "sha256:d320e147ddad8c374cd546df0b52b532dd54d0541dd9fd23fc738cbd5de76f41", size = 150413, upload-time = "2026-07-30T19:15:39.014Z" }
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+    { url = "https://files.pythonhosted.org/packages/03/32/ba457698a48a0e18d786caa770033067049fbe36d6846f8e50f13b594b51/langgraph_checkpoint_postgres-3.1.1-py3-none-any.whl", hash = "sha256:6e353aecd8150de144fef8e51a49076f58b7d6830d4cf51392b7ad4d79832ba7", size = 50778, upload-time = "2026-07-30T19:15:37.405Z" },
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 [[package]]

libs/cli/uv-examples/simple/uv.lock

@@ -26,11 +26,11 @@ wheels = [
 
 [[package]]
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-version = "2026.10.19"
+version = "2026.5.20"
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+    { url = "https://files.pythonhosted.org/packages/59/8c/57e832b7af6d7c5abe66eb3fbe3a3a32f4d11ea23a1aa7131371035be991/certifi-2026.5.20-py3-none-any.whl", hash = "sha256:3c52e209ba0a4ad7aebe60436a4ab349c39e1e602e8c134221e546902ad25897", size = 134134, upload-time = "2026-05-20T11:46:48.578Z" },
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 [[package]]

libs/cli/uv.lock

@@ -1,10 +1,10 @@
 version = 1
-revision = 5
+revision = 3
 requires-python = ">=3.10"
 resolution-markers = [
     "python_full_version >= '3.15'",
     "python_full_version >= '3.12' and python_full_version < '3.15' and sys_platform == 'emscripten'",
-    "python_full_version == '3.11.*' or (python_full_version >= '3.12' and python_full_version < '3.15' and sys_platform != 'emscripten')",
+    "(python_full_version >= '3.11' and python_full_version < '3.15' and sys_platform != 'emscripten') or (python_full_version == '3.11.*' and sys_platform == 'emscripten')",
     "python_full_version < '3.11'",
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@@ -24,8 +24,7 @@ source = { registry = "https://pypi.org/simple" }
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     { name = "exceptiongroup", marker = "python_full_version < '3.11'" },
     { name = "idna" },
-    { name = "typing-extensions", version = "4.15.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.11' and python_full_version < '3.13'" },
-    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.11'" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
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@@ -169,11 +168,11 @@ wheels = [
 
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+version = "2026.2.25"
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+    { url = "https://files.pythonhosted.org/packages/9a/3c/c17fb3ca2d9c3acff52e30b309f538586f9f5b9c9cf454f3845fc9af4881/certifi-2026.2.25-py3-none-any.whl", hash = "sha256:027692e4402ad994f1c42e52a4997a9763c646b73e4096e4d5d6db8af1d6f0fa", size = 153684, upload-time = "2026-02-25T02:54:15.766Z" },
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@@ -417,7 +416,7 @@ version = "50.0.0"
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     { name = "cffi", marker = "platform_python_implementation != 'PyPy'" },
-    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.11'" },
+    { name = "typing-extensions", marker = "python_full_version < '3.11'" },
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@@ -470,11 +469,11 @@ wheels = [
 
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+version = "0.4.0"
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+    { url = "https://files.pythonhosted.org/packages/33/6b/e0547afaf41bf2c42e52430072fa5658766e3d65bd4b03a563d1b6336f57/distlib-0.4.0-py2.py3-none-any.whl", hash = "sha256:9659f7d87e46584a30b5780e43ac7a2143098441670ff0a49d5f9034c54a6c16", size = 469047, upload-time = "2025-07-17T16:51:58.613Z" },
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 [[package]]
@@ -497,7 +496,7 @@ name = "exceptiongroup"
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 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" } },
+    { name = "typing-extensions" },
 ]
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@@ -536,7 +535,7 @@ name = "grpcio"
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 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "typing-extensions", version = "4.15.0", source = { registry = "https://pypi.org/simple" } },
+    { name = "typing-extensions" },
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-    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.11'" },
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+    { url = "https://files.pythonhosted.org/packages/43/60/1d58e8a05718cb50494763115710b73846cacb651fd735d285233fd72c59/uv-0.11.15-py3-none-win32.whl", hash = "sha256:8e2da3076761086a5b76869c3f38ef0509c836046ef41ddd19485dfd7271dca9", size = 22020178, upload-time = "2026-05-18T19:58:07.64Z" },
+    { url = "https://files.pythonhosted.org/packages/55/53/40fcefcb348af660488597ed3c01363df7344e60611f8883750dc596f5c6/uv-0.11.15-py3-none-win_amd64.whl", hash = "sha256:cc3915ab291a1ecaf31de05f5d8bd70d09c66fe9911a53f70d9efa62ff0dbd8a", size = 24668779, upload-time = "2026-05-18T19:57:44.894Z" },
+    { url = "https://files.pythonhosted.org/packages/e5/7d/fa3a9960c95af9bbe2a629048760d0b9b4fead8ccd4f2235af747ec7cdf0/uv-0.11.15-py3-none-win_arm64.whl", hash = "sha256:4f39426a13dee24897aed60c4b98058c66f18bd983885ac5f4a54a04b24fbddf", size = 23198178, upload-time = "2026-05-18T19:57:14.68Z" },
 ]
 
 [[package]]
@@ -2425,19 +2375,18 @@ wheels = [
 
 [[package]]
 name = "virtualenv"
-version = "21.14.13"
+version = "21.7.13"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "distlib" },
     { name = "filelock" },
-    { name = "packaging" },
     { name = "platformdirs" },
     { name = "python-discovery" },
-    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.11'" },
+    { name = "typing-extensions", marker = "python_full_version < '3.11'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/70/aa/bff50daee0488e16d611258a9b6c5a1d0c9e128f8ca424e9f4e1c0444ef2/virtualenv-21.14.13.tar.gz", hash = "sha256:de5307ba4b9a0001d9c8ea02832d38f63ca432880f416c1bface61c4323fd905", size = 5570301, upload-time = "2026-10-22T20:10:16.952Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/13/50/c9b84eb106d0db420b9878dac0a386c5791726f127ce20b06897f6e3a1e9/virtualenv-21.7.13.tar.gz", hash = "sha256:0355558b6f33619aab31347e43643b0ebc97f61ea3acf617b2b69e1f8a843d11", size = 5360306, upload-time = "2026-09-18T04:35:49.354Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/bb/a9/c10d8a44a29fb94a18b43fdf11f38caca53ae7c9406f11a72b1cb8f624f1/virtualenv-21.14.13-py3-none-any.whl", hash = "sha256:5fbb04138a4861580b78ba9110d529a26bc48fcc93c8ec36bc0202eeed96a788", size = 5557094, upload-time = "2026-10-22T20:10:15.096Z" },
+    { url = "https://files.pythonhosted.org/packages/9a/ce/e74453531b0c49a58d0e8a4f9bab4495705859fee4a4f7de27d58f4a791a/virtualenv-21.7.13-py3-none-any.whl", hash = "sha256:1bea5af7463f59c4719db48fe739579a2a4f569c96f26c086edda85c96da9f59", size = 5328680, upload-time = "2026-09-18T04:35:47.194Z" },
 ]
 
 [[package]]

libs/langgraph/Makefile

@@ -43,31 +43,14 @@ start-services:
 stop-services:
 	docker compose -f tests/compose-postgres.yml -f tests/compose-redis.yml down -v
 
-DEV_SERVER_PYTHON ?= 3.12
-DEV_SERVER_ENV = $(CURDIR)/.venvs/dev-server
-
 start-dev-server:
-	uv sync --frozen --group test --no-dev
-	UV_PROJECT_ENVIRONMENT=$(DEV_SERVER_ENV) uv sync --frozen --group test --no-dev --python $(DEV_SERVER_PYTHON)
-	@LOG_LEVEL=warning UV_PROJECT_ENVIRONMENT=$(DEV_SERVER_ENV) uv run --no-sync --python $(DEV_SERVER_PYTHON) langgraph dev --config tests/example_app/langgraph.json --no-browser --no-reload & \
-	PID=$$!; echo "$$PID" > .devserver.pid; \
-	for ATTEMPT in $$(seq 1 60); do \
-		if ! kill -0 $$PID 2>/dev/null; then break; fi; \
-		if curl --fail --silent --max-time 1 http://localhost:2024/ok >/dev/null; then \
-			echo "Dev server ready."; exit 0; \
-		fi; \
-		sleep 1; \
-	done; \
-	echo "Dev server failed to become ready." >&2; \
-	kill $$PID 2>/dev/null || true; \
-	wait $$PID 2>/dev/null || true; \
-	rm -f .devserver.pid; exit 1
+	LOG_LEVEL=warning uv run langgraph dev --config tests/example_app/langgraph.json --no-browser & echo "$$!" > .devserver.pid
+	@echo "Dev server started."
 
 stop-dev-server:
 	@if [ -f .devserver.pid ]; then \
-		kill $$(cat .devserver.pid) 2>/dev/null || true; \
-		rm -f .devserver.pid; \
-		echo "Dev server stopped."; \
+		kill `cat .devserver.pid` && rm .devserver.pid; \
+		 echo "Dev server stopped."; \
 	else \
 		echo "No dev server PID file found."; \
 	fi
@@ -77,12 +60,13 @@ NO_DOCKER ?= $(sh command -v docker >/dev/null 2>&1 && echo "false" || echo "tru
 
 test:
 	if [ "$(NO_DOCKER)" = "false" ]; then \
-		trap '$(MAKE) stop-dev-server; $(MAKE) stop-services' EXIT; \
-		trap 'exit 130' INT; trap 'exit 143' TERM; \
-		$(MAKE) start-services &&\
-		$(MAKE) start-dev-server &&\
-		uv run --no-sync pytest $(TEST); \
-		exit $$?; \
+		make start-services &&\
+		make start-dev-server &&\
+		uv run pytest $(TEST); \
+		EXIT_CODE=$$?; \
+		make stop-services; \
+		make stop-dev-server; \
+		exit $$EXIT_CODE; \
 	else \
 		NO_DOCKER=true uv run pytest $(TEST) ; \
 		EXIT_CODE=$$?; \
@@ -90,12 +74,13 @@ test:
 	fi
 
 test_parallel:
-	trap '$(MAKE) stop-dev-server; $(MAKE) stop-services' EXIT; \
-	trap 'exit 130' INT; trap 'exit 143' TERM; \
-	$(MAKE) start-services &&\
-	$(MAKE) start-dev-server &&\
-	uv run --no-sync pytest -n auto --dist worksteal $(TEST) -vv --lf; \
-	exit $$?
+	make start-services &&\
+	make start-dev-server &&\
+	uv run pytest -n auto --dist worksteal $(TEST) -vv --lf; \
+	EXIT_CODE=$$?; \
+	make stop-services; \
+	make stop-dev-server; \
+	exit $$EXIT_CODE
 
 integration_tests:
 	uv run pytest integration_tests

libs/langgraph/langgraph/_internal/_config.py

@@ -29,19 +29,7 @@ from langgraph._internal._constants import (
     NS_SEP,
 )
 
-
-class _DefaultRecursionLimit(int):
-    """The limit `ensure_config` fills in when none is given.
-
-    `merge_configs` skips values of this type rather than any equal value, so an
-    explicit limit that happens to equal the default still applies. It checks the
-    type, not identity, because copying or pickling a config rebuilds the value.
-    """
-
-
-DEFAULT_RECURSION_LIMIT = _DefaultRecursionLimit(
-    getenv("LANGGRAPH_DEFAULT_RECURSION_LIMIT", "10007")
-)
+DEFAULT_RECURSION_LIMIT = int(getenv("LANGGRAPH_DEFAULT_RECURSION_LIMIT", "10007"))
 DELTA_MAX_SUPERSTEPS_SINCE_SNAPSHOT = int(
     getenv("LANGGRAPH_DELTA_MAX_SUPERSTEPS_SINCE_SNAPSHOT", "5000")
 )
@@ -194,7 +182,7 @@ def merge_configs(*configs: RunnableConfig | None) -> RunnableConfig:
                     base.get("callbacks"), cast(Callbacks, value)
                 )
             elif key == "recursion_limit":
-                if not isinstance(config["recursion_limit"], _DefaultRecursionLimit):
+                if config["recursion_limit"] != DEFAULT_RECURSION_LIMIT:
                     base["recursion_limit"] = config["recursion_limit"]
             else:
                 base[key] = config[key]  # type: ignore[literal-required]
@@ -347,7 +335,6 @@ def ensure_config(*configs: RunnableConfig | None) -> RunnableConfig:
         recursion_limit=DEFAULT_RECURSION_LIMIT,
         configurable={},
     )
-    inherited_tags: set[str] = set()
     if var_config := var_child_runnable_config.get():
         empty.update(
             {
@@ -356,7 +343,6 @@ def ensure_config(*configs: RunnableConfig | None) -> RunnableConfig:
                 if _is_not_empty(v)
             },
         )
-        inherited_tags.update(empty["tags"])
     # An explicit config that supplies its own checkpoint coordinate (a
     # thread_id, or any checkpoint_ns/checkpoint_id/checkpoint_map) is addressing
     # its own checkpoint lineage, so drop the inherited ambient configurable
@@ -409,14 +395,12 @@ def ensure_config(*configs: RunnableConfig | None) -> RunnableConfig:
                 elif k == "tags":
                     # Concatenate tags across configs so values bound via
                     # with_config(...) are preserved when later configs
-                    # supply additional tags. Matches merge_configs. Tags the
-                    # ambient config already has are skipped: a subgraph gets
-                    # its parent's config both explicitly and as the ambient
-                    # one, so they would double at every nesting level.
+                    # supply additional tags. Matches merge_configs.
                     existing_tags: list[str] | None = empty.get("tags")
-                    new_tags = [t for t in cast(list, v) if t not in inherited_tags]
                     empty["tags"] = (
-                        [*existing_tags, *new_tags] if existing_tags else new_tags
+                        [*existing_tags, *cast(list, v)]
+                        if existing_tags
+                        else list(cast(list, v))
                     )
                 else:
                     empty[k] = v  # type: ignore[literal-required]

libs/langgraph/langgraph/channels/binop.py

@@ -2,7 +2,6 @@ import collections.abc
 from collections.abc import Callable, Sequence
 from typing import Any, Generic
 
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
 from typing_extensions import NotRequired, Required, Self
 
 from langgraph._internal._constants import OVERWRITE
@@ -117,9 +116,6 @@ class BinaryOperatorAggregate(Generic[Value], BaseChannel[Value, Value, Value]):
     def from_checkpoint(self, checkpoint: Value) -> Self:
         empty = self.__class__(self.typ, self.operator)
         empty.key = self.key
-        # A thread written while this field was a DeltaChannel stores snapshots.
-        if isinstance(checkpoint, _DeltaSnapshot):
-            checkpoint = checkpoint.value
         if checkpoint is not MISSING:
             empty.value = checkpoint
         return empty

libs/langgraph/langgraph/channels/delta.py

@@ -60,7 +60,7 @@ class DeltaChannel(Generic[Value], BaseChannel[Any, Any, Any]):
         typ: The value type (e.g. `list`, `dict`). Inferred automatically
             from the outer type when used inside `Annotated[T, DeltaChannel(...)]`.
         snapshot_frequency: Every Nth update to this channel writes a snapshot
-            blob (default `100`). Must be a positive int.
+            blob (default `1000`). Must be a positive int.
     """
 
     __slots__ = ("value", "reducer", "snapshot_frequency")
@@ -71,7 +71,7 @@ class DeltaChannel(Generic[Value], BaseChannel[Any, Any, Any]):
         reducer: Callable[[Any, Sequence[Any]], Any],
         typ: type[Value] | None = None,
         *,
-        snapshot_frequency: int = 100,
+        snapshot_frequency: int = 1000,
     ) -> None:
         if snapshot_frequency <= 0:
             raise ValueError(

libs/langgraph/langgraph/graph/state.py

@@ -1185,6 +1185,7 @@ class StateGraph(Generic[StateT, ContextT, InputT, OutputT]):
         debug: bool = False,
         name: str | None = None,
         transformers: Sequence[Callable[[tuple[str, ...]], Any]] | None = None,
+        insert_before: Sequence[str] | None = None,
     ) -> CompiledStateGraph[StateT, ContextT, InputT, OutputT]:
         """Compiles the `StateGraph` into a `CompiledStateGraph` object.
 
@@ -1224,6 +1225,12 @@ class StateGraph(Generic[StateT, ContextT, InputT, OutputT]):
                 the standard `StreamTransformer` constructor shape by
                 accepting `scope` as their first argument. Appended after the
                 built-in stream transformers.
+            insert_before: Nodes before which input from `RunControl.submit_input`
+                may be applied mid-run, e.g. an agent's model node.
+
+                !!! warning "Experimental"
+
+                    This parameter may change without notice.
 
         Returns:
             CompiledStateGraph: The compiled `StateGraph`.
@@ -1256,6 +1263,13 @@ class StateGraph(Generic[StateT, ContextT, InputT, OutputT]):
         # assign default values
         interrupt_before = interrupt_before or []
         interrupt_after = interrupt_after or []
+        if isinstance(insert_before, str):
+            msg = "`insert_before` takes a sequence of node names, not a string"
+            raise TypeError(msg)
+        insert_before = list(insert_before or ())
+        if unknown := [node for node in insert_before if node not in self.nodes]:
+            msg = f"`insert_before` names nodes not in the graph: {unknown}"
+            raise ValueError(msg)
 
         # validate the graph
         self.validate(
@@ -1360,6 +1374,7 @@ class StateGraph(Generic[StateT, ContextT, InputT, OutputT]):
             checkpointer=checkpointer,
             interrupt_before_nodes=interrupt_before,
             interrupt_after_nodes=interrupt_after,
+            insert_before_nodes=insert_before,
             auto_validate=False,
             debug=debug,
             store=store,
@@ -1441,6 +1456,15 @@ class CompiledStateGraph(
             name=self.get_name("Output"),
         )
 
+    def _inserted_input_channels(self) -> Sequence[str]:
+        """The graph's input keys: inserted input may write only these."""
+        keys = [
+            key
+            for key, value in self.builder.schemas[self.builder.input_schema].items()
+            if not is_managed_value(value)
+        ]
+        return () if keys == ["__root__"] else keys
+
     def attach_node(self, key: str, node: StateNodeSpec[Any, ContextT] | None) -> None:
         if key == START:
             output_keys = [

libs/langgraph/langgraph/pregel/_checkpoint.py

@@ -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
+from typing import Any, Literal, cast
 
 from langchain_core.runnables import RunnableConfig
 from langgraph.checkpoint.base import (
@@ -12,7 +12,6 @@ from langgraph.checkpoint.base import (
     ChannelVersions,
     Checkpoint,
     CheckpointTuple,
-    DeltaChannelHistory,
     PendingWrite,
 )
 from langgraph.checkpoint.base.id import uuid6
@@ -33,7 +32,7 @@ from langgraph._internal._constants import (
 )
 from langgraph._internal._typing import MISSING
 from langgraph.channels.base import BaseChannel
-from langgraph.channels.binop import BinaryOperatorAggregate, _get_overwrite
+from langgraph.channels.binop import _get_overwrite
 from langgraph.channels.delta import DeltaChannel
 from langgraph.managed.base import ManagedValueMapping, ManagedValueSpec
 
@@ -410,39 +409,23 @@ def versions_seen_without_bumps(
 def _delta_channels_to_replay(
     specs: Mapping[str, BaseChannel], checkpoint: Checkpoint
 ) -> list[str]:
-    """Channels whose value at `checkpoint` the ancestor walk rebuilds.
+    """DeltaChannels whose value at `checkpoint` the ancestor walk rebuilds.
 
     A `_DeltaSnapshot` blob or a plain value (migration) resolves directly via
     `from_checkpoint`, so only a channel with nothing stored here needs the
     walk. A channel with no version was never written, so it is empty without
     one; a walk for it would find no snapshot to stop at and read every
     ancestor, every time the thread is loaded.
-
-    A `BinaryOperatorAggregate` stores its value at every version, so one with
-    nothing stored was written as a `DeltaChannel` before its annotation
-    changed, and is rebuilt the same way.
     """
     return [
         k
         for k, spec in specs.items()
-        if isinstance(spec, (DeltaChannel, BinaryOperatorAggregate))
+        if isinstance(spec, DeltaChannel)
         and k in checkpoint["channel_versions"]
         and checkpoint["channel_values"].get(k, MISSING) is MISSING
     ]
 
 
-def _replay(spec: BaseChannel, history: DeltaChannelHistory) -> BaseChannel:
-    ch = spec.from_checkpoint(history.get("seed", MISSING))
-    if isinstance(ch, DeltaChannel):
-        ch.replay_writes(history["writes"])
-    else:
-        # One update per write: the writes span many supersteps, and a single
-        # call would reject a second Overwrite and drop the writes after one.
-        for _, _, value in history["writes"]:
-            ch.update([value])
-    return ch
-
-
 def _require_saver_for_history(
     delta_channels: list[str],
     saver: BaseCheckpointSaver | None,
@@ -482,7 +465,7 @@ def channels_from_checkpoint(
 
     delta_channels = _delta_channels_to_replay(channel_specs, checkpoint)
     _require_saver_for_history(delta_channels, saver, config)
-    histories: Mapping[str, DeltaChannelHistory] = {}
+    histories: Mapping[str, Any] = {}
     if delta_channels and saver is not None and config is not None:
         histories = saver.get_delta_channel_history(
             config=config, channels=delta_channels
@@ -492,7 +475,11 @@ def channels_from_checkpoint(
     for k, spec in channel_specs.items():
         ch: BaseChannel
         if k in histories:
-            ch = _replay(spec, histories[k])
+            delta_spec = cast(DeltaChannel, spec)
+            history = histories[k]
+            replay_ch = delta_spec.from_checkpoint(history.get("seed", MISSING))
+            replay_ch.replay_writes(history["writes"])
+            ch = replay_ch
         else:
             ch = spec.from_checkpoint(checkpoint["channel_values"].get(k, MISSING))
         channels[k] = ch
@@ -517,7 +504,7 @@ async def achannels_from_checkpoint(
 
     delta_channels = _delta_channels_to_replay(channel_specs, checkpoint)
     _require_saver_for_history(delta_channels, saver, config)
-    histories: Mapping[str, DeltaChannelHistory] = {}
+    histories: Mapping[str, Any] = {}
     if delta_channels and saver is not None and config is not None:
         histories = await saver.aget_delta_channel_history(
             config=config, channels=delta_channels
@@ -527,7 +514,11 @@ async def achannels_from_checkpoint(
     for k, spec in channel_specs.items():
         ch: BaseChannel
         if k in histories:
-            ch = _replay(spec, histories[k])
+            delta_spec = cast(DeltaChannel, spec)
+            history = histories[k]
+            replay_ch = delta_spec.from_checkpoint(history.get("seed", MISSING))
+            replay_ch.replay_writes(history["writes"])
+            ch = replay_ch
         else:
             ch = spec.from_checkpoint(checkpoint["channel_values"].get(k, MISSING))
         channels[k] = ch

libs/langgraph/langgraph/pregel/_executor.py

@@ -3,7 +3,6 @@ from __future__ import annotations
 import asyncio
 import concurrent.futures
 import time
-import weakref
 from collections.abc import Awaitable, Callable, Coroutine
 from contextlib import AbstractAsyncContextManager, AbstractContextManager, ExitStack
 from contextvars import copy_context
@@ -38,13 +37,6 @@ class Submit(Protocol[P, T]):
     ) -> concurrent.futures.Future[T]: ...
 
 
-# Futures whose exception a node's error handler took over; the executors
-# don't re-raise them on exit.
-SKIP_RERAISE_SET: weakref.WeakSet[concurrent.futures.Future | asyncio.Future] = (
-    weakref.WeakSet()
-)
-
-
 class BackgroundExecutor(AbstractContextManager):
     """A context manager that runs sync tasks in the background.
     Uses a thread pool executor to delegate tasks to separate threads.
@@ -119,7 +111,7 @@ class BackgroundExecutor(AbstractContextManager):
         if exc_type is None:
             # re-raise the first exception that occurred in a task
             for task, (_, reraise) in tasks.items():
-                if not reraise or task in SKIP_RERAISE_SET:
+                if not reraise:
                     continue
                 try:
                     task.result()
@@ -210,7 +202,7 @@ class AsyncBackgroundExecutor(AbstractAsyncContextManager):
         if exc_type is None:
             # re-raise the first exception that occurred in a task
             for task, (_, reraise) in tasks.items():
-                if not reraise or task in SKIP_RERAISE_SET:
+                if not reraise:
                     continue
                 try:
                     if exc := task.exception():

libs/langgraph/langgraph/pregel/_loop.py

@@ -57,6 +57,7 @@ from langgraph._internal._constants import (
     NS_END,
     NS_SEP,
     NULL_TASK_ID,
+    PULL,
     PUSH,
     RESUME,
     TASKS,
@@ -122,6 +123,7 @@ from langgraph.pregel._io import (
     map_output_values,
     read_channels,
 )
+from langgraph.pregel._log import logger
 from langgraph.pregel._messages import ensure_message_ids
 from langgraph.pregel._read import PregelNode
 from langgraph.pregel._task_status import read_task_statuses
@@ -187,6 +189,8 @@ class PregelLoop:
     manager: None | AsyncParentRunManager | ParentRunManager
     interrupt_after: All | Sequence[str]
     interrupt_before: All | Sequence[str]
+    insert_before: Sequence[str]
+    insert_channels: Sequence[str]
     durability: Durability
     retry_policy: Sequence[RetryPolicy]
     cache_policy: CachePolicy | None
@@ -257,10 +261,8 @@ class PregelLoop:
     _resume_loaded_writes: Sequence[PendingWrite] = ()
     # Tasks `_reapply_writes_to_succeeded_nodes` handed loaded writes back to.
     _reapplied_task_ids: set[str]
-    # Tasks that wrote during this run, the only ones exit mode saves at exit.
-    _written_task_ids: set[str]
-    # A checkpoint addressed by `checkpoint_id` that the thread has moved past,
-    # so it may already have children.
+    # An update or fork checkpoint addressed by `checkpoint_id` that the thread
+    # has moved past, so it may already have children.
     _addressed_checkpoint_superseded: bool = False
 
     # The checkpoint_config that points at the parent loaded at `__enter__`
@@ -328,6 +330,8 @@ class PregelLoop:
         durability: Durability,
         interrupt_after: All | Sequence[str] = EMPTY_SEQ,
         interrupt_before: All | Sequence[str] = EMPTY_SEQ,
+        insert_before: Sequence[str] = EMPTY_SEQ,
+        insert_channels: Sequence[str] = EMPTY_SEQ,
         manager: None | AsyncParentRunManager | ParentRunManager = None,
         migrate_checkpoint: Callable[[Checkpoint], None] | None = None,
         retry_policy: Sequence[RetryPolicy] = (),
@@ -349,8 +353,11 @@ class PregelLoop:
         self.stream_keys = stream_keys
         self.interrupt_after = interrupt_after
         self.interrupt_before = interrupt_before
+        self.insert_before = insert_before
+        self.insert_channels = insert_channels
         self.manager = manager
         self.is_nested = CONFIG_KEY_TASK_ID in self.config.get(CONF, {})
+        self.is_replaying = CONFIG_KEY_CHECKPOINT_ID in config[CONF]
         self._migrate_checkpoint = migrate_checkpoint
         self.trigger_to_nodes = trigger_to_nodes
         self.retry_policy = retry_policy
@@ -408,14 +415,6 @@ class PregelLoop:
             else ()
         )
         self.prev_checkpoint_config = None
-        # Whether the run points this loop at a checkpoint: a truthy
-        # `checkpoint_id`, this graph's `checkpoint_map` entry, or a replaying
-        # parent. Every task config carries `checkpoint_id: None`, so a key
-        # check would count every subgraph.
-        self._addressed = bool(
-            self.checkpoint_config[CONF].get(CONFIG_KEY_CHECKPOINT_ID)
-            or self.config[CONF].get(CONFIG_KEY_REPLAY_STATE)
-        )
         runtime = self.config[CONF].get(CONFIG_KEY_RUNTIME)
         self.control = runtime.control if isinstance(runtime, Runtime) else None
 
@@ -464,7 +463,6 @@ class PregelLoop:
         """Put writes for a task, to be read by the next tick."""
         if not writes:
             return
-        self._written_task_ids.add(task_id)
         # deduplicate writes to special channels, last write wins
         if all(w[0] in WRITES_IDX_MAP for w in writes):
             writes = list({w[0]: w for w in writes}.values())
@@ -478,11 +476,6 @@ class PregelLoop:
                 for w in self.checkpoint_pending_writes
                 if w[0] != task_id or w[1] not in WRITES_IDX_MAP
             ]
-            # Savers key a regular write by its position in the list, and the
-            # special ones dropped above won't be there next time, so they go
-            # last: a resume saved ahead of an update would move it to a new
-            # slot once the list is saved again, and it would apply twice.
-            writes = sorted(writes, key=lambda w: w[0] in WRITES_IDX_MAP)
             writes_to_save: WritesT = [
                 w[1:] for w in self.checkpoint_pending_writes if w[0] == task_id
             ] + list(writes)
@@ -571,12 +564,10 @@ class PregelLoop:
                 CONFIG_KEY_CHECKPOINT_ID: self.checkpoint["id"],
             },
         )
-        # Writes loaded with the checkpoint are stored on it already. Saving them
-        # again can file them under new indexes, and then they apply twice.
+        # group by task id
         by_task = defaultdict(list)
         for task_id, channel, value in self.checkpoint_pending_writes:
-            if task_id in self._written_task_ids:
-                by_task[task_id].append((channel, value))
+            by_task[task_id].append((channel, value))
         # submit writes to checkpointer
         for task_id, writes in by_task.items():
             if self.checkpointer_put_writes_accepts_task_path and hasattr(
@@ -657,11 +648,48 @@ class PregelLoop:
         # check if iteration limit is reached
         if self.step > self.stop:
             self.status = "out_of_steps"
-            # stream the checkpoint the last step saved, as a tick that runs would
-            self._prepare_tasks_and_emit_checkpoint()
             return False
 
-        self._prepare_tasks_and_emit_checkpoint()
+        # prepare next tasks
+        self.tasks = prepare_next_tasks(
+            self.checkpoint,
+            self.checkpoint_pending_writes,
+            self.nodes,
+            self.channels,
+            self.managed,
+            self.config,
+            self.step,
+            self.stop,
+            for_execution=True,
+            manager=self.manager,
+            store=self.store,
+            checkpointer=self.checkpointer,
+            trigger_to_nodes=self.trigger_to_nodes,
+            updated_channels=self.updated_channels,
+            retry_policy=self.retry_policy,
+            cache_policy=self.cache_policy,
+        )
+
+        # produce debug output
+        if self._checkpointer_put_after_previous is not None:
+            self._emit(
+                "checkpoints",
+                map_debug_checkpoint,
+                {
+                    **self.checkpoint_config,
+                    CONF: {
+                        **self.checkpoint_config[CONF],
+                        CONFIG_KEY_CHECKPOINT_ID: self.checkpoint["id"],
+                    },
+                },
+                self.channels,
+                self.stream_keys,
+                self.checkpoint_metadata,
+                self.tasks.values(),
+                self.checkpoint_pending_writes,
+                self.prev_checkpoint_config,
+                self.output_keys,
+            )
 
         # if no more tasks, we're done
         if not self.tasks:
@@ -687,6 +715,11 @@ class PregelLoop:
             self.status = "draining"
             return False
 
+        # apply input inserted into the running run, then plan the step again
+        # from the new state
+        if self._accepts_inserted_input() and self._apply_inserted_input():
+            return self.tick()
+
         # produce debug output
         self._emit("tasks", map_debug_tasks, self.tasks.values())
 
@@ -769,53 +802,10 @@ class PregelLoop:
             self.checkpoint, self.interrupt_after, self.tasks.values()
         ):
             self.status = "interrupt_after"
-            # the next tick, which streams this checkpoint, never runs
-            self._prepare_tasks_and_emit_checkpoint()
             raise GraphInterrupt()
         # unset resuming flag
         self.config[CONF].pop(CONFIG_KEY_RESUMING, None)
 
-    def _prepare_tasks_and_emit_checkpoint(self) -> None:
-        self.tasks = prepare_next_tasks(
-            self.checkpoint,
-            self.checkpoint_pending_writes,
-            self.nodes,
-            self.channels,
-            self.managed,
-            self.config,
-            self.step,
-            self.stop,
-            for_execution=True,
-            manager=self.manager,
-            store=self.store,
-            checkpointer=self.checkpointer,
-            trigger_to_nodes=self.trigger_to_nodes,
-            updated_channels=self.updated_channels,
-            retry_policy=self.retry_policy,
-            cache_policy=self.cache_policy,
-        )
-
-        # produce debug output
-        if self._checkpointer_put_after_previous is not None:
-            self._emit(
-                "checkpoints",
-                map_debug_checkpoint,
-                {
-                    **self.checkpoint_config,
-                    CONF: {
-                        **self.checkpoint_config[CONF],
-                        CONFIG_KEY_CHECKPOINT_ID: self.checkpoint["id"],
-                    },
-                },
-                self.channels,
-                self.stream_keys,
-                self.checkpoint_metadata,
-                self.tasks.values(),
-                self.checkpoint_pending_writes,
-                self.prev_checkpoint_config,
-                self.output_keys,
-            )
-
     def match_cached_writes(self) -> Sequence[PregelExecutableTask]:
         raise NotImplementedError
 
@@ -824,6 +814,110 @@ class PregelLoop:
 
     # private
 
+    def _accepts_inserted_input(self) -> bool:
+        """Whether queued input can be applied before the next step.
+
+        Only in a top-level `StateGraph`, only when every next task is a node
+        declared in `insert_before` that reads the state (not a `Send`, which
+        gets its own argument), and never on the step a resume continues: the
+        resume applies to the state it paused on.
+        """
+        return (
+            self.control is not None
+            and self.control.has_inputs
+            and not self.is_nested
+            and bool(self.insert_before)
+            and bool(self.insert_channels)
+            and not self.config[CONF].get(CONFIG_KEY_RESUMING, False)
+            and all(
+                task.path[0] == PULL and task.name in self.insert_before
+                for task in self.tasks.values()
+            )
+        )
+
+    def _apply_inserted_input(self) -> bool:
+        """Apply queued input to the state and save it as an `input` checkpoint.
+
+        Each input gets its own write, so two that set the same plain key don't
+        raise; the later one wins. Returns whether any was applied, so `tick()`
+        plans the step again.
+        """
+        applied: list[str] = []
+        writes: list[tuple[str, Any]] = []
+        inserted_channels: set[str] = set()
+        for input_id, value in cast(RunControl, self.control).take_inputs():
+            if not (input_writes := self._inserted_writes(input_id, value)):
+                continue
+            inserted_channels |= apply_writes(
+                self.checkpoint,
+                self.channels,
+                [PregelTaskWrites((), INPUT, input_writes, [])],
+                self.checkpointer_get_next_version,
+                self.trigger_to_nodes,
+            )
+            writes.extend(input_writes)
+            applied.append(input_id)
+        if not applied:
+            return False
+        # snapshot delta channels this input wrote, so they read back without
+        # their writes stored separately
+        self._delta_channels_forced_snapshot.update(
+            channel
+            for channel, _ in writes
+            if isinstance(self.specs.get(channel), DeltaChannel)
+        )
+        # add to the last step's updated channels, which trigger the planned tasks
+        self.updated_channels = (self.updated_channels or set()) | inserted_channels
+        if not inserted_channels.isdisjoint(
+            (self.output_keys,)
+            if isinstance(self.output_keys, str)
+            else self.output_keys
+        ):
+            self._emit(
+                "values", map_output_values, self.output_keys, writes, self.channels
+            )
+        self._put_checkpoint(
+            cast(
+                CheckpointMetadata,
+                {"source": "input", "inserted_inputs": applied},
+            )
+        )
+        # the checkpoint took a step, but no node ran: keep the recursion budget
+        self.stop += 1
+        return True
+
+    def _inserted_writes(self, input_id: str, value: Any) -> list[tuple[str, Any]]:
+        """State updates for inserted input, or none if the state rejects it.
+
+        Written straight to the state channels: through `__start__`, the graph
+        would route back to its entry.
+        """
+        if not isinstance(value, dict):
+            logger.warning(
+                "Skipping inserted input %s: expected a dict of state keys, got %s",
+                input_id,
+                type(value).__name__,
+            )
+            return []
+        if ignored := [key for key in value if key not in self.insert_channels]:
+            logger.warning(
+                "Ignoring keys of inserted input %s that aren't graph input keys: %s",
+                input_id,
+                ignored,
+            )
+        writes = [(k, v) for k, v in value.items() if k in self.insert_channels]
+        try:
+            for key, val in writes:
+                self.channels[key].copy().update([val])
+        except Exception:
+            logger.warning(
+                "Skipping inserted input %s: the state rejected it",
+                input_id,
+                exc_info=True,
+            )
+            return []
+        return writes
+
     @property
     def _reapplies_pending_writes(self) -> bool:
         """Whether the writes loaded with the checkpoint go back to the tasks
@@ -927,7 +1021,6 @@ class PregelLoop:
             if tid != NULL_TASK_ID and isinstance(self.specs.get(ch), DeltaChannel)
         }
         self._exit_command_writes = []
-        self._written_task_ids = set()
         # Resuming from a previous checkpoint requires two things:
         # 1. A prior checkpoint exists (channel_versions is non-empty)
         # 2. The input signals continuation (not a fresh run with new input)
@@ -955,7 +1048,7 @@ class PregelLoop:
         # writes so that interrupt() calls re-fire instead of returning
         # stale values. But if we're actively resuming, keep them —
         # multi-interrupt scenarios need previously resolved values preserved.
-        is_time_traveling = self._addressed and (
+        is_time_traveling = self.is_replaying and (
             # Time-travel to a subgraph checkpoint: the parent sets
             # RESUMING=True (it can't distinguish time-travel from resume),
             # so we check if this subgraph's own ns is in checkpoint_map.
@@ -974,10 +1067,6 @@ class PregelLoop:
                 or configurable.get(CONFIG_KEY_RESUMING, False)
             )
         )
-        # Finished tasks rerun only on time travel, or on a resume at a
-        # checkpoint the thread has moved past. A resume addressed at the
-        # thread's latest checkpoint hands their writes back, as without an id.
-        self.is_replaying = is_time_traveling or self._addressed_checkpoint_superseded
         if is_time_traveling:
             self.checkpoint_pending_writes = [
                 w for w in self.checkpoint_pending_writes if w[1] != RESUME
@@ -1193,11 +1282,11 @@ class PregelLoop:
             # checkpoint ID since the fork was created after the subgraph's
             # checkpoints from the original execution.
             #
-            # Only gate on is_time_traveling (not _addressed). When the
+            # Only gate on is_time_traveling (not is_replaying). When the
             # client resumes with an explicit checkpoint_id that happens to
             # point at the current head (e.g. LangGraph Studio sending
             # `checkpoint: {checkpoint_id}` alongside Command(resume=...)),
-            # the run is addressed but not time traveling. In that
+            # is_replaying is True but is_time_traveling is False. In that
             # case subgraphs should load their latest checkpoint normally,
             # not go through ReplayState's before-bound lookup which would
             # miss subgraph checkpoints created during processing of the
@@ -1666,6 +1755,8 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
         manager: None | AsyncParentRunManager | ParentRunManager = None,
         interrupt_after: All | Sequence[str] = EMPTY_SEQ,
         interrupt_before: All | Sequence[str] = EMPTY_SEQ,
+        insert_before: Sequence[str] = EMPTY_SEQ,
+        insert_channels: Sequence[str] = EMPTY_SEQ,
         input_keys: str | Sequence[str] = EMPTY_SEQ,
         output_keys: str | Sequence[str] = EMPTY_SEQ,
         stream_keys: str | Sequence[str] = EMPTY_SEQ,
@@ -1688,6 +1779,8 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
             stream_keys=stream_keys,
             interrupt_after=interrupt_after,
             interrupt_before=interrupt_before,
+            insert_before=insert_before,
+            insert_channels=insert_channels,
             manager=manager,
             migrate_checkpoint=migrate_checkpoint,
             trigger_to_nodes=trigger_to_nodes,
@@ -1817,7 +1910,7 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
             # This covers both normal replay and subgraphs resolved via
             # checkpoint_map during time-travel.
             saved = self.checkpointer.get_tuple(self.checkpoint_config)
-            if saved is not None:
+            if saved is not None and saved.metadata.get("source") in ("update", "fork"):
                 self._addressed_checkpoint_superseded = checkpoint_superseded(
                     self.checkpointer, self.checkpoint_config, saved
                 )
@@ -1921,6 +2014,8 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
         durability: Durability,
         interrupt_after: All | Sequence[str] = EMPTY_SEQ,
         interrupt_before: All | Sequence[str] = EMPTY_SEQ,
+        insert_before: Sequence[str] = EMPTY_SEQ,
+        insert_channels: Sequence[str] = EMPTY_SEQ,
         manager: None | AsyncParentRunManager | ParentRunManager = None,
         input_keys: str | Sequence[str] = EMPTY_SEQ,
         output_keys: str | Sequence[str] = EMPTY_SEQ,
@@ -1944,6 +2039,8 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
             stream_keys=stream_keys,
             interrupt_after=interrupt_after,
             interrupt_before=interrupt_before,
+            insert_before=insert_before,
+            insert_channels=insert_channels,
             manager=manager,
             migrate_checkpoint=migrate_checkpoint,
             trigger_to_nodes=trigger_to_nodes,
@@ -2073,7 +2170,7 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
             # This covers both normal replay and subgraphs resolved via
             # checkpoint_map during time-travel.
             saved = await self.checkpointer.aget_tuple(self.checkpoint_config)
-            if saved is not None:
+            if saved is not None and saved.metadata.get("source") in ("update", "fork"):
                 self._addressed_checkpoint_superseded = await acheckpoint_superseded(
                     self.checkpointer, self.checkpoint_config, saved
                 )

libs/langgraph/langgraph/pregel/_runner.py

@@ -41,9 +41,9 @@ from langgraph._internal._future import chain_future, run_coroutine_threadsafe
 from langgraph._internal._scratchpad import PregelScratchpad
 from langgraph._internal._typing import MISSING
 from langgraph.constants import TAG_HIDDEN
-from langgraph.errors import GraphBubbleUp, GraphInterrupt, is_invalid_resume
+from langgraph.errors import GraphBubbleUp, GraphInterrupt
 from langgraph.pregel._algo import Call
-from langgraph.pregel._executor import SKIP_RERAISE_SET, Submit
+from langgraph.pregel._executor import Submit
 from langgraph.pregel._retry import arun_with_retry, run_with_retry
 from langgraph.pregel._task_status import CONTROL_WRITES
 from langgraph.types import (
@@ -68,6 +68,10 @@ EXCLUDED_FRAME_FNAMES = (
     "concurrent/futures/_base.py",
 )
 
+SKIP_RERAISE_SET: weakref.WeakSet[concurrent.futures.Future | asyncio.Future] = (
+    weakref.WeakSet()
+)
+
 
 class FuturesDict(Generic[F, E], dict[F, PregelExecutableTask | None]):
     event: E
@@ -235,8 +239,6 @@ class PregelRunner:
                         fut.set_exception(exc)
                         futures.done.add(fut)
                 elif reraise and id(exc) not in self._handled_exception_ids:
-                    # let the caller stream this task's result before it raises
-                    yield
                     if tb := exc.__traceback__:
                         while tb.tb_next is not None and any(
                             tb.tb_frame.f_code.co_filename.endswith(name)
@@ -428,8 +430,6 @@ class PregelRunner:
                         fut.set_exception(exc)
                         futures.done.add(fut)
                 elif reraise and id(exc) not in self._handled_exception_ids:
-                    # let the caller stream this task's result before it raises
-                    yield
                     if tb := exc.__traceback__:
                         while tb.tb_next is not None and any(
                             tb.tb_frame.f_code.co_filename.endswith(name)
@@ -621,11 +621,7 @@ def _should_stop_others(
     handled_exception_ids: set[int] | None = None,
 ) -> bool:
     """Check if any task failed, if so, cancel all other tasks.
-    GraphInterrupts are not considered failures.
-
-    Neither is an invalid resume value: it's raised once the other tasks finish, so a
-    task answered in the same resume isn't cut off after its side effects and then run
-    again with its saved answer."""
+    GraphInterrupts are not considered failures."""
     for fut in done:
         if fut.cancelled():
             continue
@@ -633,7 +629,6 @@ def _should_stop_others(
             if (
                 id(exc) not in (handled_exception_ids or set())
                 and not isinstance(exc, GraphBubbleUp)
-                and not is_invalid_resume(exc)
                 and fut not in SKIP_RERAISE_SET
             ):
                 return True

libs/langgraph/langgraph/pregel/main.py

@@ -732,6 +732,14 @@ class Pregel(
 
     interrupt_before_nodes: All | Sequence[str]
 
+    insert_before_nodes: Sequence[str] = ()
+    """Nodes before which input inserted into a running run may be applied.
+
+    !!! warning "Experimental"
+
+        This attribute may change without notice.
+    """
+
     input_channels: str | Sequence[str]
 
     step_timeout: float | None = None
@@ -777,6 +785,7 @@ class Pregel(
         stream_channels: str | Sequence[str] | None = None,
         interrupt_after_nodes: All | Sequence[str] = (),
         interrupt_before_nodes: All | Sequence[str] = (),
+        insert_before_nodes: Sequence[str] = (),
         input_channels: str | Sequence[str],
         step_timeout: float | None = None,
         debug: bool | None = None,
@@ -823,6 +832,7 @@ class Pregel(
         self.stream_channels = stream_channels
         self.interrupt_after_nodes = interrupt_after_nodes
         self.interrupt_before_nodes = interrupt_before_nodes
+        self.insert_before_nodes = insert_before_nodes
         self.input_channels = input_channels
         self.step_timeout = step_timeout
         self.debug = debug if debug is not None else get_debug()
@@ -987,6 +997,10 @@ class Pregel(
             "image/png": self.get_graph().draw_mermaid_png(),
         }
 
+    def _inserted_input_channels(self) -> Sequence[str]:
+        """Channels inserted input may write; none for a plain `Pregel`."""
+        return ()
+
     def copy(self, update: dict[str, Any] | None = None) -> Self:
         attrs = {k: v for k, v in self.__dict__.items() if k != "__orig_class__"}
         attrs.update(update or {})
@@ -2802,7 +2816,8 @@ class Pregel(
                 - `"sync"`: Changes are persisted synchronously before the next step starts.
                 - `"async"`: Changes are persisted asynchronously while the next step executes.
                 - `"exit"`: Changes are persisted only when the graph exits.
-            control: Optional run control used to request cooperative drain.
+            control: Optional run control used to request cooperative drain or to
+                insert input into the run (see `RunControl`).
             subgraphs: Whether to stream events from inside subgraphs, defaults to `False`.
 
                 If `True`, the events will be emitted as tuples `(namespace, data)`,
@@ -3001,6 +3016,8 @@ class Pregel(
                 stream_keys=self.stream_channels_asis,
                 interrupt_before=interrupt_before_,
                 interrupt_after=interrupt_after_,
+                insert_before=self.insert_before_nodes,
+                insert_channels=self._inserted_input_channels(),
                 manager=run_manager,
                 durability=durability_,
                 trigger_to_nodes=self.trigger_to_nodes,
@@ -3208,7 +3225,8 @@ class Pregel(
                 - `"sync"`: Changes are persisted synchronously before the next step starts.
                 - `"async"`: Changes are persisted asynchronously while the next step executes.
                 - `"exit"`: Changes are persisted only when the graph exits.
-            control: Optional run control used to request cooperative drain.
+            control: Optional run control used to request cooperative drain or to
+                insert input into the run (see `RunControl`).
             subgraphs: Whether to stream events from inside subgraphs, defaults to `False`.
 
                 If `True`, the events will be emitted as tuples `(namespace, data)`,
@@ -3453,6 +3471,8 @@ class Pregel(
                 stream_keys=self.stream_channels_asis,
                 interrupt_before=interrupt_before_,
                 interrupt_after=interrupt_after_,
+                insert_before=self.insert_before_nodes,
+                insert_channels=self._inserted_input_channels(),
                 manager=run_manager,
                 durability=durability_,
                 trigger_to_nodes=self.trigger_to_nodes,
@@ -3958,7 +3978,8 @@ class Pregel(
                 - `"sync"`: Changes are persisted synchronously before the next step starts.
                 - `"async"`: Changes are persisted asynchronously while the next step executes.
                 - `"exit"`: Changes are persisted only when the graph exits.
-            control: Optional run control used to request cooperative drain.
+            control: Optional run control used to request cooperative drain or to
+                insert input into the run (see `RunControl`).
             version: The streaming format version. `"v1"` (default) returns the
                 traditional format, `"v2"` returns `StreamPart` typed dicts when
                 `stream_mode` is not `"values"`.
@@ -4135,7 +4156,8 @@ class Pregel(
                 - `"sync"`: Changes are persisted synchronously before the next step starts.
                 - `"async"`: Changes are persisted asynchronously while the next step executes.
                 - `"exit"`: Changes are persisted only when the graph exits.
-            control: Optional run control used to request cooperative drain.
+            control: Optional run control used to request cooperative drain or to
+                insert input into the run (see `RunControl`).
             version: The streaming format version. `"v1"` (default) returns the
                 traditional format, `"v2"` returns `StreamPart` typed dicts when
                 `stream_mode` is not `"values"`.

libs/langgraph/langgraph/pregel/remote.py

@@ -861,6 +861,11 @@ class RemoteGraph(PregelProtocol):
                     )
                 yield {"type": mode, "ns": ns, "data": chunk.data, "interrupts": ints}
             elif subgraphs:
+                if NS_SEP in chunk.event:
+                    mode, ns_ = chunk.event.split(NS_SEP, 1)
+                    ns = tuple(ns_.split(NS_SEP))
+                else:
+                    mode, ns = chunk.event, ()
                 if req_single:
                     yield ns, chunk.data
                 else:
@@ -1011,6 +1016,11 @@ class RemoteGraph(PregelProtocol):
                     )
                 yield {"type": mode, "ns": ns, "data": chunk.data, "interrupts": ints}
             elif subgraphs:
+                if NS_SEP in chunk.event:
+                    mode, ns_ = chunk.event.split(NS_SEP, 1)
+                    ns = tuple(ns_.split(NS_SEP))
+                else:
+                    mode, ns = chunk.event, ()
                 if req_single:
                     yield ns, chunk.data
                 else:

libs/langgraph/langgraph/runtime.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import threading
 from collections.abc import Callable
 from dataclasses import dataclass, field, replace
 from typing import Any, Generic, cast
@@ -77,24 +78,66 @@ class ServerInfo:
 
 
 class RunControl:
-    """Run-scoped control surface for cooperative draining.
+    """Run-scoped control surface for cooperative draining and inserted input.
 
     Intended for a single graph run. Create a fresh `RunControl` per run;
     reusing a control after `request_drain()` leaves it drained.
 
     Safe to call from any thread: the drain request is represented by a
-    single attribute write, so no lock is needed for this signal.
-    If more mutable state is added here, add synchronization.
+    single attribute write, so no lock is needed for this signal. Inserted
+    input is guarded by a lock.
     """
 
-    __slots__ = ("_drain_reason",)
+    __slots__ = ("_drain_reason", "_inputs", "_inputs_lock")
 
     def __init__(self) -> None:
         self._drain_reason: str | None = None
+        self._inputs: list[tuple[str, Any]] = []
+        self._inputs_lock = threading.Lock()
 
     def request_drain(self, reason: str = "shutdown") -> None:
         self._drain_reason = reason
 
+    def submit_input(self, input_id: str, value: Any) -> None:
+        """Queue input for the running graph to apply at its next safe step boundary.
+
+        !!! warning "Experimental"
+
+            This method may change without notice.
+
+        The graph applies queued input only right before the nodes in its
+        `insert_before`, the points it declares safe (for an agent, before the
+        next model call, so input never lands between a tool call and its
+        result). Only the top-level graph applies it, since a subgraph's state
+        isn't the caller's, and never on the step a resume continues, since the
+        resume answers the state it paused on. Input it can't apply (not a dict
+        of the graph's input keys, or a value the state rejects) is skipped and
+        logged rather than failing the run. Input the run never reaches stays
+        queued, so the caller can run it afterwards.
+
+        Args:
+            input_id: Recorded in the `inserted_inputs` metadata of the
+                checkpoint that applied it.
+            value: A dict of the graph's input keys.
+        """
+        with self._inputs_lock:
+            self._inputs.append((input_id, value))
+
+    @property
+    def has_inputs(self) -> bool:
+        """Whether input is queued and not yet applied."""
+        return bool(self._inputs)
+
+    def take_inputs(self) -> list[tuple[str, Any]]:
+        """Remove and return queued input in the order it was submitted.
+
+        Returns:
+            `(input_id, value)` pairs.
+        """
+        with self._inputs_lock:
+            inputs, self._inputs = self._inputs, []
+        return inputs
+
     @property
     def drain_requested(self) -> bool:
         return self._drain_reason is not None

libs/langgraph/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph"
-version = "1.2.18"
+version = "1.2.15"
 description = "Building stateful, multi-actor applications with LLMs"
 authors = []
 requires-python = ">=3.10"

libs/langgraph/tests/test_channels.py

@@ -20,7 +20,6 @@ from langgraph.errors import EmptyChannelError, InvalidUpdateError
 from langgraph.graph import START, StateGraph
 from langgraph.graph.message import _messages_delta_reducer
 from langgraph.graph.state import _get_channel
-from langgraph.pregel._checkpoint import delta_channels_to_snapshot
 from langgraph.types import Overwrite
 
 pytestmark = pytest.mark.anyio
@@ -343,26 +342,6 @@ def test_delta_channel_checkpoint_returns_missing() -> None:
 # ---------------------------------------------------------------------------
 
 
-@pytest.mark.parametrize("frequency", [None, 50, 1000])
-def test_delta_channel_snapshot_frequency(frequency: int | None) -> None:
-    spec = (
-        DeltaChannel(_messages_delta_reducer)
-        if frequency is None
-        else DeltaChannel(_messages_delta_reducer, snapshot_frequency=frequency)
-    )
-    expected = 100 if frequency is None else frequency
-    assert spec.snapshot_frequency == expected
-    channel = spec.from_checkpoint(MISSING)
-    channel.update([HumanMessage(content="hi", id="h1")])
-    assert channel.copy().snapshot_frequency == expected
-    for updates in (expected - 1, expected):
-        assert delta_channels_to_snapshot(
-            {"messages": channel},
-            {"messages": (updates, updates)},
-            {"messages": 1},
-        ) == ({"messages"} if updates == expected else set())
-
-
 def test_delta_channel_snapshot_version_based() -> None:
     """Snapshots fire when a channel accumulates `snapshot_frequency` updates.
 

libs/langgraph/tests/test_config_async.py

@@ -1,19 +1,11 @@
-from collections.abc import Callable
-
 import pytest
 from langchain_core.callbacks import AsyncCallbackManager, BaseCallbackHandler
 
-from langgraph._internal._config import (
-    DEFAULT_RECURSION_LIMIT,
-    get_async_callback_manager_for_config,
-)
+from langgraph._internal._config import get_async_callback_manager_for_config
 from langgraph.graph import StateGraph
-from langgraph.pregel import Pregel
 
 pytestmark = pytest.mark.anyio
 
-EXPLICIT_DEFAULT_LIMIT = int(DEFAULT_RECURSION_LIMIT)
-
 
 def test_new_async_manager_includes_tags() -> None:
     config = {"callbacks": None}
@@ -122,27 +114,3 @@ async def test_with_config_tags_preserved_on_invoke() -> None:
     await graph.ainvoke({}, {"tags": ["invoke"]})
     assert "bound" in captured, "bound tag was dropped by ensure_config overwrite"
     assert "invoke" in captured, "invoke-time tag not present"
-
-
-@pytest.mark.parametrize(
-    "rebind",
-    [
-        lambda g: g.with_config(recursion_limit=EXPLICIT_DEFAULT_LIMIT),
-        lambda g: g.with_config({"recursion_limit": EXPLICIT_DEFAULT_LIMIT}),
-        lambda g: g.with_config(
-            {"recursion_limit": 1}, recursion_limit=EXPLICIT_DEFAULT_LIMIT
-        ),
-        lambda g: g.with_config(recursion_limit=EXPLICIT_DEFAULT_LIMIT).with_config(
-            tags=["t"]
-        ),
-    ],
-    ids=["kwarg", "config", "kwarg_over_config", "kept_by_later_with_config"],
-)
-def test_with_config_applies_recursion_limit_equal_to_default(
-    rebind: Callable[[Pregel], Pregel],
-) -> None:
-    builder = StateGraph(dict)
-    builder.add_node("node", lambda state: state)
-    builder.add_edge("__start__", "node")
-    graph = builder.compile().with_config(recursion_limit=EXPLICIT_DEFAULT_LIMIT + 1)
-    assert rebind(graph).config["recursion_limit"] == EXPLICIT_DEFAULT_LIMIT

libs/langgraph/tests/test_delta_channel_exit_mode.py

@@ -521,11 +521,10 @@ def test_addressed_resume_keeps_a_rerun_tasks_write_to_a_new_channel(
     graph = builder.compile(checkpointer=sync_checkpointer)
     config = {"configurable": {"thread_id": "t"}}
     graph.invoke(_both("in"), config, durability=durability)
-    paused = graph.get_state(config).config
-    graph.update_state(config, None)
+    head = graph.get_state(config).config
 
     live = graph.invoke(
-        Command(resume="yes", update={"flag": True}), paused, durability=durability
+        Command(resume="yes", update={"flag": True}), head, durability=durability
     )
 
     state = graph.get_state(config)

libs/langgraph/tests/test_delta_channel_to_plain.py

@@ -1,148 +0,0 @@
-import operator
-from typing import Annotated, Any
-from unittest.mock import patch
-
-import pytest
-from langchain_core.messages import AIMessage, HumanMessage
-from langchain_core.runnables import RunnableConfig
-from langgraph.checkpoint.base import BaseCheckpointSaver
-from langgraph.checkpoint.memory import InMemorySaver
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
-from typing_extensions import TypedDict
-
-from langgraph.channels.binop import BinaryOperatorAggregate
-from langgraph.channels.delta import DeltaChannel
-from langgraph.graph import END, START, StateGraph
-from langgraph.graph.message import _messages_delta_reducer, add_messages
-from langgraph.pregel._checkpoint import channels_from_checkpoint, empty_checkpoint
-from langgraph.types import Overwrite
-
-pytestmark = pytest.mark.anyio
-
-
-class DeltaState(TypedDict):
-    messages: Annotated[
-        list, DeltaChannel(_messages_delta_reducer, snapshot_frequency=3)
-    ]
-
-
-class PlainState(TypedDict):
-    messages: Annotated[list, add_messages]
-
-
-def _app(schema: type, checkpointer: BaseCheckpointSaver) -> Any:
-    builder = StateGraph(schema)
-    builder.add_node(
-        "chat",
-        lambda state: {"messages": [AIMessage(f"reply {len(state['messages'])}")]},
-    )
-    builder.add_edge(START, "chat")
-    builder.add_edge("chat", END)
-    return builder.compile(checkpointer=checkpointer)
-
-
-def _delta_thread(checkpointer: BaseCheckpointSaver) -> RunnableConfig:
-    config: RunnableConfig = {"configurable": {"thread_id": "1"}}
-    delta = _app(DeltaState, checkpointer)
-    for i in range(4):
-        delta.invoke({"messages": [HumanMessage(f"q{i}")]}, config)
-    assert any(
-        isinstance(t.checkpoint["channel_values"].get("messages"), _DeltaSnapshot)
-        for t in checkpointer.list(config)
-    ), "the thread should have a snapshot to read through"
-    return config
-
-
-def test_plain_reducer_reads_every_delta_written_checkpoint(
-    sync_checkpointer: BaseCheckpointSaver,
-) -> None:
-    config = _delta_thread(sync_checkpointer)
-    delta = _app(DeltaState, sync_checkpointer)
-    plain = _app(PlainState, sync_checkpointer)
-
-    assert [s.values for s in plain.get_state_history(config)] == [
-        s.values for s in delta.get_state_history(config)
-    ]
-
-
-def test_plain_reducer_continues_delta_written_thread(
-    sync_checkpointer: BaseCheckpointSaver,
-) -> None:
-    config = _delta_thread(sync_checkpointer)
-    delta = _app(DeltaState, sync_checkpointer)
-    before = delta.get_state(config).values["messages"]
-
-    after = _app(PlainState, sync_checkpointer).invoke(
-        {"messages": [HumanMessage("q4")]}, config
-    )["messages"]
-
-    assert after[:-2] == before
-    assert [m.content for m in after[-2:]] == ["q4", f"reply {len(before) + 1}"]
-    head = sync_checkpointer.get_tuple(config)
-    assert head is not None
-    assert head.checkpoint["channel_values"]["messages"] == after
-    assert delta.get_state(config).values["messages"] == after
-
-
-async def test_plain_reducer_reads_and_continues_delta_written_thread_async(
-    async_checkpointer: BaseCheckpointSaver,
-) -> None:
-    config: RunnableConfig = {"configurable": {"thread_id": "1"}}
-    delta = _app(DeltaState, async_checkpointer)
-    for i in range(4):
-        await delta.ainvoke({"messages": [HumanMessage(f"q{i}")]}, config)
-    plain = _app(PlainState, async_checkpointer)
-
-    expected = [s.values async for s in delta.aget_state_history(config)]
-    assert [s.values async for s in plain.aget_state_history(config)] == expected
-
-    after = (await plain.ainvoke({"messages": [HumanMessage("q4")]}, config))[
-        "messages"
-    ]
-    assert after[:-2] == expected[0]["messages"]
-
-
-@pytest.mark.parametrize(
-    ("seed", "writes", "expected"),
-    [
-        (_DeltaSnapshot(["a"]), [["b"], ["c"]], ["a", "b", "c"]),
-        (["a"], [["b"], Overwrite(["c"]), ["d"]], ["c", "d"]),
-        (None, [["b"], Overwrite(["c"]), Overwrite(["d"]), ["e"]], ["d", "e"]),
-    ],
-)
-def test_plain_reducer_replays_delta_history_one_write_at_a_time(
-    seed: Any, writes: list[Any], expected: list[str]
-) -> None:
-    history: dict[str, Any] = {"writes": [("t", "items", w) for w in writes]}
-    if seed is not None:
-        history["seed"] = seed
-    checkpoint = empty_checkpoint()
-    checkpoint["channel_versions"]["items"] = 1
-    saver = InMemorySaver()
-
-    with patch.object(
-        saver, "get_delta_channel_history", return_value={"items": history}
-    ):
-        channels, _ = channels_from_checkpoint(
-            {"items": BinaryOperatorAggregate(list, operator.add)},
-            checkpoint,
-            saver=saver,
-            config={"configurable": {"thread_id": "1"}},
-        )
-
-    assert channels["items"].get() == expected
-
-
-def test_plain_thread_reads_never_walk_history() -> None:
-    saver = InMemorySaver()
-    config: RunnableConfig = {"configurable": {"thread_id": "1"}}
-    plain = _app(PlainState, saver)
-
-    with patch.object(saver, "get_delta_channel_history") as walk:
-        plain.invoke({"messages": [HumanMessage("q0")]}, config)
-        plain.update_state(config, {"messages": [HumanMessage("note")]})
-        plain.invoke({"messages": [HumanMessage("q1")]}, config)
-        plain.get_state(config)
-        list(plain.get_state_history(config))
-
-    walk.assert_not_called()

libs/langgraph/tests/test_inserted_input.py

@@ -0,0 +1,333 @@
+import operator
+from typing import Annotated
+
+import pytest
+from langgraph.checkpoint.memory import InMemorySaver
+from typing_extensions import TypedDict
+
+from langgraph.errors import GraphRecursionError
+from langgraph.graph import END, START, StateGraph
+from langgraph.runtime import RunControl
+from langgraph.types import Command, Send, interrupt
+
+
+class State(TypedDict, total=False):
+    log: Annotated[list[str], operator.add]
+    seen: list[str]
+
+
+def _tools_then_model(control: RunControl) -> StateGraph:
+    """`tools` queues input while it runs; `model` records what it sees."""
+
+    def tools(state: State) -> State:
+        control.submit_input("insert-1", {"log": ["inserted"]})
+        return {"log": ["tools"]}
+
+    def model(state: State) -> State:
+        return {"seen": list(state["log"])}
+
+    graph = StateGraph(State)
+    graph.add_node("tools", tools)
+    graph.add_node("model", model)
+    graph.add_edge(START, "tools")
+    graph.add_edge("tools", "model")
+    graph.add_edge("model", END)
+    return graph
+
+
+def test_inserted_input_is_applied_before_an_allowed_node() -> None:
+    control = RunControl()
+    checkpointer = InMemorySaver()
+    graph = _tools_then_model(control).compile(
+        checkpointer=checkpointer, insert_before=["model"]
+    )
+    config = {"configurable": {"thread_id": "1"}}
+
+    result = graph.invoke({"log": ["user"]}, config, control=control)
+
+    assert result["seen"] == ["user", "tools", "inserted"]
+    assert not control.has_inputs
+    inserted = [
+        snapshot.metadata
+        for snapshot in graph.get_state_history(config)
+        if snapshot.metadata.get("inserted_inputs")
+    ]
+    assert len(inserted) == 1
+    assert inserted[0]["source"] == "input"
+    assert inserted[0]["inserted_inputs"] == ["insert-1"]
+
+
+@pytest.mark.anyio
+async def test_inserted_input_is_applied_before_an_allowed_node_async() -> None:
+    control = RunControl()
+    graph = _tools_then_model(control).compile(
+        checkpointer=InMemorySaver(), insert_before=["model"]
+    )
+
+    result = await graph.ainvoke(
+        {"log": ["user"]}, {"configurable": {"thread_id": "1"}}, control=control
+    )
+
+    assert result["seen"] == ["user", "tools", "inserted"]
+    assert not control.has_inputs
+
+
+def test_inserted_input_is_applied_without_a_checkpointer() -> None:
+    control = RunControl()
+    graph = _tools_then_model(control).compile(insert_before=["model"])
+
+    result = graph.invoke({"log": ["user"]}, control=control)
+
+    assert result["seen"] == ["user", "tools", "inserted"]
+
+
+@pytest.mark.parametrize("insert_before", [None, ["tools"]])
+def test_inserted_input_waits_when_the_next_node_is_not_allowed(
+    insert_before: list[str] | None,
+) -> None:
+    control = RunControl()
+    graph = _tools_then_model(control).compile(insert_before=insert_before)
+
+    result = graph.invoke({"log": ["user"]}, control=control)
+
+    assert result["seen"] == ["user", "tools"]
+    assert control.take_inputs() == [("insert-1", {"log": ["inserted"]})]
+
+
+def _outer(node: object) -> StateGraph:
+    """Runs `node` (which runs a subgraph), then `finish`."""
+
+    def finish(state: State) -> State:
+        return {"log": ["finished"]}
+
+    outer = StateGraph(State)
+    outer.add_node("outer", node)
+    outer.add_node("finish", finish)
+    outer.add_edge(START, "outer")
+    outer.add_edge("outer", "finish")
+    outer.add_edge("finish", END)
+    return outer
+
+
+def test_inserted_input_is_not_applied_inside_a_subgraph() -> None:
+    control = RunControl()
+    inner = _tools_then_model(control).compile(insert_before=["model"])
+
+    def outer_node(state: State) -> State:
+        return inner.invoke({"log": state["log"]})
+
+    result = (
+        _outer(outer_node)
+        .compile(insert_before=["finish"])
+        .invoke({"log": ["user"]}, control=control)
+    )
+
+    # the subgraph's model didn't see it; the parent applied it before `finish`
+    assert result["seen"] == ["user", "tools"]
+    assert result["log"][-2:] == ["inserted", "finished"]
+
+
+@pytest.mark.anyio
+async def test_inserted_input_is_not_applied_inside_a_subgraph_async() -> None:
+    control = RunControl()
+    inner = _tools_then_model(control).compile(insert_before=["model"])
+
+    async def outer_node(state: State) -> State:
+        return await inner.ainvoke({"log": state["log"]})
+
+    result = await (
+        _outer(outer_node)
+        .compile(insert_before=["finish"])
+        .ainvoke({"log": ["user"]}, control=control)
+    )
+
+    assert result["seen"] == ["user", "tools"]
+    assert result["log"][-2:] == ["inserted", "finished"]
+
+
+def test_inserted_input_is_streamed_as_values() -> None:
+    control = RunControl()
+    graph = _tools_then_model(control).compile(insert_before=["model"])
+
+    chunks = list(
+        graph.stream({"log": ["user"]}, control=control, stream_mode="values")
+    )
+
+    assert {"log": ["user", "tools", "inserted"]} in chunks
+
+
+@pytest.mark.parametrize(
+    "value", ["not a dict", {"seen": ["forged"]}, {"branch:to:model": None}]
+)
+def test_invalid_inserted_input_is_skipped(value: object) -> None:
+    class InputState(TypedDict):
+        log: Annotated[list[str], operator.add]
+
+    control = RunControl()
+
+    def tools(state: State) -> State:
+        control.submit_input("bad", value)
+        return {"log": ["tools"]}
+
+    def model(state: State) -> State:
+        return {"seen": list(state["log"])}
+
+    builder = StateGraph(State, input_schema=InputState)
+    builder.add_node("tools", tools)
+    builder.add_node("model", model)
+    builder.add_edge(START, "tools")
+    builder.add_edge("tools", "model")
+    builder.add_edge("model", END)
+    checkpointer = InMemorySaver()
+    graph = builder.compile(checkpointer=checkpointer, insert_before=["model"])
+    config = {"configurable": {"thread_id": "1"}}
+
+    result = graph.invoke({"log": ["user"]}, config, control=control)
+
+    assert result["seen"] == ["user", "tools"]
+    assert not any(
+        snapshot.metadata.get("inserted_inputs")
+        for snapshot in graph.get_state_history(config)
+    )
+
+
+@pytest.mark.parametrize("by_id", [False, True])
+def test_inserted_input_waits_while_resuming(by_id: bool) -> None:
+    def model(state: State) -> State:
+        answer = interrupt("approve?")
+        return {"log": [f"answered {answer}"], "seen": list(state["log"])}
+
+    builder = StateGraph(State)
+    builder.add_node("model", model)
+    builder.add_edge(START, "model")
+    builder.add_edge("model", END)
+    graph = builder.compile(checkpointer=InMemorySaver(), insert_before=["model"])
+    config = {"configurable": {"thread_id": "1"}}
+    paused = graph.invoke({"log": ["user"]}, config)
+    interrupt_id = paused["__interrupt__"][0].id
+    control = RunControl()
+    control.submit_input("insert-1", {"log": ["inserted"]})
+
+    result = graph.invoke(
+        Command(resume={interrupt_id: "yes"} if by_id else "yes"),
+        config,
+        control=control,
+    )
+
+    # the resume is answered as asked; the input waits for a later boundary
+    assert result["seen"] == ["user"]
+    assert result["log"] == ["user", "answered yes"]
+    assert control.take_inputs() == [("insert-1", {"log": ["inserted"]})]
+
+
+def test_insert_before_rejects_unknown_nodes() -> None:
+    graph = _tools_then_model(RunControl())
+
+    with pytest.raises(ValueError, match="missing"):
+        graph.compile(insert_before=["missing"])
+
+
+def test_inserts_are_applied_one_by_one_and_bad_values_skipped() -> None:
+    class InputState(TypedDict, total=False):
+        log: Annotated[list[str], operator.add]
+        note: str
+
+    class FullState(InputState, total=False):
+        seen: list[str]
+
+    control = RunControl()
+
+    def tools(state: FullState) -> FullState:
+        control.submit_input("first", {"note": "a", "log": ["one"]})
+        control.submit_input("bad", {"log": "not a list"})
+        control.submit_input("second", {"note": "b", "log": ["two"]})
+        return {"log": ["tools"]}
+
+    def model(state: FullState) -> FullState:
+        return {"seen": [*state["log"], state.get("note", "")]}
+
+    builder = StateGraph(FullState, input_schema=InputState)
+    builder.add_node("tools", tools)
+    builder.add_node("model", model)
+    builder.add_edge(START, "tools")
+    builder.add_edge("tools", "model")
+    builder.add_edge("model", END)
+    checkpointer = InMemorySaver()
+    graph = builder.compile(checkpointer=checkpointer, insert_before=["model"])
+    config = {"configurable": {"thread_id": "1"}}
+
+    result = graph.invoke({"log": ["user"]}, config, control=control)
+
+    assert result["seen"] == ["user", "tools", "one", "two", "b"]
+    inserted = [
+        snapshot.metadata["inserted_inputs"]
+        for snapshot in graph.get_state_history(config)
+        if snapshot.metadata.get("inserted_inputs")
+    ]
+    assert inserted == [["first", "second"]]
+
+
+def test_inserted_input_waits_while_resuming_from_a_breakpoint() -> None:
+    control = RunControl()
+    graph = _tools_then_model(control).compile(
+        checkpointer=InMemorySaver(),
+        insert_before=["model"],
+        interrupt_before=["model"],
+    )
+    config = {"configurable": {"thread_id": "1"}}
+    graph.invoke({"log": ["user"]}, config)
+    assert graph.get_state(config).next == ("model",)
+
+    result = graph.invoke(None, config, control=control)
+
+    # the breakpoint is passed once; the input waits for a later boundary
+    assert result["seen"] == ["user", "tools"]
+    assert graph.get_state(config).next == ()
+
+
+def test_inserted_input_is_not_applied_without_steps_left() -> None:
+    control = RunControl()
+    graph = _tools_then_model(control).compile(insert_before=["model"])
+
+    with pytest.raises(GraphRecursionError):
+        graph.invoke({"log": ["user"]}, {"recursion_limit": 1}, control=control)
+
+    assert control.take_inputs() == [("insert-1", {"log": ["inserted"]})]
+
+
+def test_inserted_input_keeps_the_recursion_budget() -> None:
+    control = RunControl()
+    graph = _tools_then_model(control).compile(insert_before=["model"])
+    # the smallest limit the graph runs within without inserted input
+    config = {"recursion_limit": 3}
+    _tools_then_model(RunControl()).compile().invoke({"log": ["user"]}, config)
+
+    result = graph.invoke({"log": ["user"]}, config, control=control)
+
+    assert result["seen"] == ["user", "tools", "inserted"]
+
+
+def test_inserted_input_waits_for_a_node_started_by_send() -> None:
+    control = RunControl()
+
+    def tools(state: State) -> State:
+        control.submit_input("insert-1", {"log": ["inserted"]})
+        return {"log": ["tools"]}
+
+    def model(state: State) -> State:
+        return {"seen": list(state["log"])}
+
+    builder = StateGraph(State)
+    builder.add_node("tools", tools)
+    builder.add_node("model", model)
+    builder.add_edge(START, "tools")
+    builder.add_conditional_edges("tools", lambda _: [Send("model", {"log": ["sent"]})])
+    builder.add_edge("model", END)
+
+    result = builder.compile(insert_before=["model"]).invoke(
+        {"log": ["user"]}, control=control
+    )
+
+    # `model` reads its `Send` argument, so the input would never reach it
+    assert result["seen"] == ["sent"]
+    assert control.take_inputs() == [("insert-1", {"log": ["inserted"]})]

libs/langgraph/tests/test_interrupt_state.py

@@ -152,83 +152,6 @@ def test_finished_task_does_not_report_answered_interrupt(
         assert asked == [["A1", "B"]]
 
 
-def test_finished_task_output_applies_once(
-    sync_checkpointer: BaseCheckpointSaver, durability: Durability
-) -> None:
-    builder = StateGraph(State)
-    builder.add_node("a", lambda s: {"log": [f"a:{interrupt('A')}"]})
-    builder.add_node("b", lambda s: {"log": [f"b:{interrupt('B')}"]})
-    builder.add_node("c", lambda s: {"log": [f"c:{interrupt('C')}"]})
-    builder.add_edge(START, "a")
-    builder.add_edge(START, "b")
-    builder.add_edge(START, "c")
-    graph = builder.compile(checkpointer=sync_checkpointer)
-    config = _config()
-
-    result = graph.invoke({"log": []}, config, durability=durability)
-    while pending := result.get("__interrupt__"):
-        result = graph.invoke(
-            Command(resume={pending[0].id: "yes"}), config, durability=durability
-        )
-
-    assert sorted(result["log"]) == ["a:yes", "b:yes", "c:yes"]
-
-
-def test_resume_with_update_applies_the_update_once(
-    sync_checkpointer: BaseCheckpointSaver, durability: Durability
-) -> None:
-    def ask_three_times(state: State) -> State:
-        answers = [interrupt(str(question)) for question in range(1, 4)]
-        return {"log": ["a:" + "".join(answers)]}
-
-    graph = (
-        StateGraph(State)
-        .add_node("a", ask_three_times)
-        .add_edge(START, "a")
-        .compile(checkpointer=sync_checkpointer)
-    )
-    config = _config()
-
-    result = graph.invoke({"log": []}, config, durability=durability)
-    for i in range(1, 4):
-        result = graph.invoke(
-            Command(resume=str(i), update={"log": [f"u{i}"]}),
-            config,
-            durability=durability,
-        )
-
-    assert sorted(result["log"]) == ["a:123", "u1", "u2", "u3"]
-    assert sorted(graph.get_state(config).values["log"]) == sorted(result["log"])
-
-
-@pytest.mark.parametrize("checkpoint_id", ["none", "head"])
-def test_resume_at_the_latest_checkpoint_does_not_rerun_finished_task(
-    sync_checkpointer: BaseCheckpointSaver, checkpoint_id: str
-) -> None:
-    calls: Counter[str] = Counter()
-    graph = _build_parallel(sync_checkpointer, calls)
-    config = _config()
-    graph.invoke({"log": []}, config)
-
-    def resume(question: str, answer: str) -> Any:
-        snapshot = graph.get_state(config)
-        target = (
-            snapshot.config
-            if checkpoint_id == "head"
-            else {"configurable": {**config["configurable"], "checkpoint_id": None}}
-        )
-        return graph.invoke(
-            Command(resume={_interrupt_by_value(snapshot, question).id: answer}),
-            target,
-        )
-
-    resume("A1", "yes")
-    result = resume("B", "ok")
-
-    assert sorted(result["log"]) == ["a:yes", "b:ok"]
-    assert calls == {"a": 2, "b": 3}, "resuming B ran the finished A again"
-
-
 @NEEDS_CONTEXTVARS
 async def test_finished_task_does_not_report_answered_interrupt_async(
     async_checkpointer: BaseCheckpointSaver,
@@ -551,64 +474,6 @@ def test_functional_task_finished_with_none_is_not_rerun(
     assert calls == {"a": 2, "b": 3}
 
 
-def test_subgraph_finished_task_is_not_rerun(
-    sync_checkpointer: BaseCheckpointSaver, durability: Durability
-) -> None:
-    calls: Counter[str] = Counter()
-    builder = StateGraph(State)
-    builder.add_node("child", _build_parallel(None, calls))
-    builder.add_edge(START, "child")
-    graph = builder.compile(checkpointer=sync_checkpointer)
-    config = _config()
-
-    graph.invoke({"log": []}, config, durability=durability)
-    snapshot = graph.get_state(config)
-    graph.invoke(
-        Command(resume={_interrupt_by_value(snapshot, "A1").id: "yes"}),
-        config,
-        durability=durability,
-    )
-    snapshot = graph.get_state(config)
-    result = graph.invoke(
-        Command(resume={_interrupt_by_value(snapshot, "B").id: "ok"}),
-        config,
-        durability=durability,
-    )
-
-    assert sorted(result["log"]) == ["a:yes", "b:ok"]
-    assert calls == {"a": 2, "b": 3}, "resuming B ran the finished A again"
-
-
-def test_nested_entrypoint_finished_task_is_not_rerun(
-    sync_checkpointer: BaseCheckpointSaver,
-) -> None:
-    calls: Counter[str] = Counter()
-
-    @task
-    def step_1(query: str) -> str:
-        calls["step_1"] += 1
-        return f"{query} bar"
-
-    @task
-    def human_feedback(query: str) -> str:
-        calls["human_feedback"] += 1
-        return f"{query} {interrupt('feedback?')}"
-
-    @entrypoint()
-    def child(query: str) -> str:
-        return human_feedback(step_1(query).result()).result()
-
-    @entrypoint(checkpointer=sync_checkpointer)
-    def parent(query: str) -> str:
-        return child.invoke(query)
-
-    config = _config()
-    parent.invoke("foo", config)
-
-    assert parent.invoke(Command(resume="baz"), config) == "foo bar baz"
-    assert calls == {"step_1": 1, "human_feedback": 2}
-
-
 # --- Reading task status from recorded writes ---
 
 

libs/langgraph/tests/test_interruption.py

@@ -1,8 +1,5 @@
-import asyncio
-import operator
-import sys
 from dataclasses import dataclass
-from typing import Annotated, Any
+from typing import Any
 
 import pytest
 from langgraph.checkpoint.base import BaseCheckpointSaver
@@ -254,61 +251,3 @@ def test_interrupt_response_schema_invalid_resume_after_earlier_interrupt(
     assert graph.invoke(resume({"approved": True}), config) == {
         "answer": ["ok", Decision(approved=True)]
     }
-
-
-@pytest.mark.skipif(
-    sys.version_info < (3, 11),
-    reason="Python 3.11+ is required for async contextvars support",
-)
-async def test_invalid_resume_lets_other_answered_tasks_finish(
-    async_checkpointer: BaseCheckpointSaver,
-) -> None:
-    """An invalid answer fails the resume without cutting off the other answered tasks.
-
-    A task cancelled after its side effect keeps its answer and runs again on the next
-    resume, so the side effect would happen twice.
-    """
-    sent: list[str] = []
-
-    class State(TypedDict):
-        log: Annotated[list[str], operator.add]
-
-    async def send(state: State) -> State:
-        interrupt("send?", response_schema=Decision)
-        sent.append("email")
-        await asyncio.sleep(0.05)  # waiting on the reply to a request already sent
-        return {"log": ["sent"]}
-
-    async def check(state: State) -> State:
-        interrupt("check?", response_schema=Decision)
-        return {"log": ["checked"]}
-
-    graph = (
-        StateGraph(State)
-        .add_node("send", send)
-        .add_node("check", check)
-        .add_edge(START, "send")
-        .add_edge(START, "check")
-        .compile(checkpointer=async_checkpointer)
-    )
-    config = {"configurable": {"thread_id": "1"}}
-    await graph.ainvoke({"log": []}, config)
-    ids = {i.value: i.id for i in (await graph.aget_state(config)).interrupts}
-
-    with pytest.raises(ValidationError, match="approved"):
-        await graph.ainvoke(
-            Command(
-                resume={
-                    ids["send?"]: {"approved": True},
-                    ids["check?"]: {"approved": "nope"},
-                }
-            ),
-            config,
-        )
-    pending = [i.value for i in (await graph.aget_state(config)).interrupts]
-    assert (pending, sent) == (["check?"], ["email"])
-
-    result = await graph.ainvoke(
-        Command(resume={ids["check?"]: {"approved": True}}), config
-    )
-    assert (sorted(result["log"]), sent) == (["checked", "sent"], ["email"])

libs/langgraph/tests/test_pregel.py

@@ -4346,25 +4346,6 @@ def test_enum_node_names():
     assert graph.invoke({"foo": "hello"}) == {"foo": "hello", "bar": "hello!"}
 
 
-@pytest.mark.parametrize("stream_mode", ["tasks", "debug"])
-def test_failing_task_result_is_streamed_before_the_error(stream_mode: str) -> None:
-    class State(TypedDict):
-        x: str
-
-    def failing(state: State) -> State:
-        raise ValueError("boom")
-
-    graph = StateGraph(State).add_node("failing", failing).add_edge(START, "failing")
-    errors = []
-    with pytest.raises(ValueError, match="boom"):
-        for chunk in graph.compile().stream({"x": ""}, stream_mode=stream_mode):
-            payload = chunk["payload"] if stream_mode == "debug" else chunk
-            if "error" in payload:
-                errors.append(payload["error"])
-
-    assert [type(error) for error in errors] == [ValueError]
-
-
 def test_debug_retry(sync_checkpointer: BaseCheckpointSaver):
     class State(TypedDict):
         messages: Annotated[list[str], operator.add]
@@ -4429,52 +4410,6 @@ def test_debug_retry(sync_checkpointer: BaseCheckpointSaver):
         assert stream_parent_conf == history_parent_conf
 
 
-def test_interrupt_after_streams_the_checkpoint_it_pauses_on(
-    sync_checkpointer: BaseCheckpointSaver,
-) -> None:
-    class State(TypedDict):
-        x: int
-
-    graph = (
-        StateGraph(State)
-        .add_node("one", lambda state: {"x": 1})
-        .add_node("two", lambda state: {"x": 2})
-        .add_edge(START, "one")
-        .add_edge("one", "two")
-        .compile(checkpointer=sync_checkpointer, interrupt_after=["one"])
-    )
-    config = {"configurable": {"thread_id": "1"}}
-
-    checkpoints = list(graph.stream({"x": 0}, config, stream_mode="checkpoints"))
-
-    state = graph.get_state(config)
-    assert checkpoints[-1]["config"] == state.config
-    assert checkpoints[-1]["next"] == ["two"]
-
-
-def test_recursion_limit_streams_the_last_checkpoint_saved(
-    sync_checkpointer: BaseCheckpointSaver,
-) -> None:
-    class State(TypedDict):
-        x: int
-
-    graph = (
-        StateGraph(State)
-        .add_node("loop", lambda state: {"x": state["x"] + 1})
-        .add_edge(START, "loop")
-        .add_edge("loop", "loop")
-        .compile(checkpointer=sync_checkpointer)
-    )
-    config = {"configurable": {"thread_id": "1"}, "recursion_limit": 3}
-    checkpoints = []
-
-    with pytest.raises(GraphRecursionError):
-        for chunk in graph.stream({"x": 0}, config, stream_mode="checkpoints"):
-            checkpoints.append(chunk)
-
-    assert checkpoints[-1]["config"] == graph.get_state(config).config
-
-
 def test_debug_subgraphs(
     sync_checkpointer: BaseCheckpointSaver, durability: Durability
 ):
@@ -6945,22 +6880,6 @@ def test_named_tasks_functional() -> None:
     ]
 
 
-def test_invoke_tags_reach_a_node_three_subgraphs_deep_once() -> None:
-    class State(TypedDict):
-        copies: int
-
-    def leaf(state: State, config: RunnableConfig) -> State:
-        return {"copies": config["tags"].count("my-tag")}
-
-    graph = StateGraph(State).add_node("leaf", leaf).add_edge(START, "leaf").compile()
-    for _ in range(3):
-        graph = (
-            StateGraph(State).add_node("sub", graph).add_edge(START, "sub").compile()
-        )
-
-    assert graph.invoke({"copies": 0}, {"tags": ["my-tag"]}) == {"copies": 1}
-
-
 def test_tags_stream_mode_messages() -> None:
     model = GenericFakeChatModel(messages=iter(["foo"]), tags=["meow"])
     graph = (
@@ -7818,8 +7737,6 @@ def test_parallel_interrupts(sync_checkpointer: BaseCheckpointSaver) -> None:
 def test_parallel_interrupts_double(sync_checkpointer: BaseCheckpointSaver) -> None:
     # --- CHILD GRAPH ---
 
-    answered: Counter[str] = Counter()
-
     class ChildState(BaseModel):
         prompt: str = Field(..., description="What is going to be asked to the user?")
         human_input: str | None = Field(None, description="What the human said")
@@ -7829,7 +7746,6 @@ def test_parallel_interrupts_double(sync_checkpointer: BaseCheckpointSaver) -> N
 
     def get_human_input(state: ChildState):
         human_input = interrupt(state.prompt)
-        answered["human"] += 1
 
         return dict(
             human_inputs=[human_input],  # update parent state
@@ -7837,7 +7753,6 @@ def test_parallel_interrupts_double(sync_checkpointer: BaseCheckpointSaver) -> N
 
     def get_dolphin_input(state: ChildState):
         human_input = interrupt(state.prompt)
-        answered["dolphin"] += 1
 
         return dict(
             human_inputs=[human_input],  # update parent state
@@ -7931,7 +7846,6 @@ def test_parallel_interrupts_double(sync_checkpointer: BaseCheckpointSaver) -> N
 
     assert invokes == 5
     assert len(events) == 5
-    assert answered == {"human": 2, "dolphin": 2}
 
 
 def test_pregel_loop_refcount():

libs/langgraph/tests/test_pregel_async.py

@@ -5809,60 +5809,6 @@ async def test_store_injected_async(
     )  # still overwriting the same one
 
 
-@pytest.mark.parametrize("stream_mode", ["tasks", "debug"])
-async def test_failing_task_result_is_streamed_before_the_error(
-    stream_mode: str,
-) -> None:
-    class State(TypedDict):
-        x: str
-
-    async def failing(state: State) -> State:
-        raise ValueError("boom")
-
-    graph = StateGraph(State).add_node("failing", failing).add_edge(START, "failing")
-    errors = []
-    with pytest.raises(ValueError, match="boom"):
-        async for chunk in graph.compile().astream({"x": ""}, stream_mode=stream_mode):
-            payload = chunk["payload"] if stream_mode == "debug" else chunk
-            if "error" in payload:
-                errors.append(payload["error"])
-
-    assert [type(error) for error in errors] == [ValueError]
-
-
-@pytest.mark.parametrize(
-    ("parallel", "stream_mode"), [(False, "custom"), (True, "values")]
-)
-async def test_graph_error_handler_recovers_on_the_executor_path(
-    parallel: bool, stream_mode: str
-) -> None:
-    class State(TypedDict):
-        x: str
-
-    async def failing(state: State) -> State:
-        raise ValueError("boom")
-
-    async def handler(state: State) -> Command:
-        return Command(update={"x": "handled"}, goto=END)
-
-    builder = (
-        StateGraph(State)
-        .add_node("failing", failing, error_handler=handler)
-        .add_edge(START, "failing")
-    )
-    if parallel:
-        builder.add_node("sibling", lambda state: {}).add_edge(START, "sibling")
-
-    chunks = [
-        chunk
-        async for chunk in builder.compile().astream(
-            {"x": ""}, stream_mode=[stream_mode, "values"]
-        )
-    ]
-
-    assert [c[-1] for c in chunks if c[0] == "values"][-1] == {"x": "handled"}
-
-
 async def test_debug_retry(async_checkpointer: BaseCheckpointSaver):
     class State(TypedDict):
         messages: Annotated[list[str], operator.add]
@@ -5929,55 +5875,6 @@ async def test_debug_retry(async_checkpointer: BaseCheckpointSaver):
         assert stream_parent_conf == history_parent_conf
 
 
-async def test_interrupt_after_streams_the_checkpoint_it_pauses_on(
-    async_checkpointer: BaseCheckpointSaver,
-) -> None:
-    class State(TypedDict):
-        x: int
-
-    graph = (
-        StateGraph(State)
-        .add_node("one", lambda state: {"x": 1})
-        .add_node("two", lambda state: {"x": 2})
-        .add_edge(START, "one")
-        .add_edge("one", "two")
-        .compile(checkpointer=async_checkpointer, interrupt_after=["one"])
-    )
-    config = {"configurable": {"thread_id": "1"}}
-
-    checkpoints = [
-        chunk
-        async for chunk in graph.astream({"x": 0}, config, stream_mode="checkpoints")
-    ]
-
-    state = await graph.aget_state(config)
-    assert checkpoints[-1]["config"] == state.config
-    assert checkpoints[-1]["next"] == ["two"]
-
-
-async def test_recursion_limit_streams_the_last_checkpoint_saved(
-    async_checkpointer: BaseCheckpointSaver,
-) -> None:
-    class State(TypedDict):
-        x: int
-
-    graph = (
-        StateGraph(State)
-        .add_node("loop", lambda state: {"x": state["x"] + 1})
-        .add_edge(START, "loop")
-        .add_edge("loop", "loop")
-        .compile(checkpointer=async_checkpointer)
-    )
-    config = {"configurable": {"thread_id": "1"}, "recursion_limit": 3}
-    checkpoints = []
-
-    with pytest.raises(GraphRecursionError):
-        async for chunk in graph.astream({"x": 0}, config, stream_mode="checkpoints"):
-            checkpoints.append(chunk)
-
-    assert checkpoints[-1]["config"] == (await graph.aget_state(config)).config
-
-
 async def test_debug_subgraphs(
     async_checkpointer: BaseCheckpointSaver, durability: Durability
 ):

libs/langgraph/tests/test_prune_postgres.py

@@ -1,490 +0,0 @@
-import operator
-import sys
-from collections.abc import Callable
-from contextlib import contextmanager
-from threading import Event
-from typing import Annotated, Any
-
-import pytest
-from langchain_core.messages import AIMessage, AnyMessage, HumanMessage
-from langchain_core.runnables import RunnableConfig
-from langgraph.checkpoint.postgres import PostgresSaver
-from langgraph.checkpoint.postgres.base import PRUNE_DELTA_THREADS_SQL, PRUNE_HEADS_SQL
-from typing_extensions import TypedDict
-
-from langgraph.channels.delta import DeltaChannel
-from langgraph.graph import START, StateGraph
-from langgraph.graph.message import _messages_delta_reducer, add_messages
-from langgraph.types import Command, StateSnapshot, interrupt
-from tests.conftest import NO_DOCKER
-from tests.conftest_checkpointer import (
-    DEFAULT_POSTGRES_URI,
-    _checkpointer_postgres,
-    _checkpointer_postgres_aio,
-    _checkpointer_postgres_aio_pipe,
-    _checkpointer_postgres_aio_pool,
-    _checkpointer_postgres_pipe,
-    _checkpointer_postgres_pool,
-)
-
-pytestmark = [
-    pytest.mark.anyio,
-    pytest.mark.skipif(NO_DOCKER, reason="needs Postgres"),
-]
-
-NEEDS_CONTEXTVARS = pytest.mark.skipif(
-    sys.version_info < (3, 11),
-    reason="Python 3.11+ is required for async contextvars support",
-)
-
-SYNC = [
-    _checkpointer_postgres,
-    _checkpointer_postgres_pipe,
-    _checkpointer_postgres_pool,
-]
-ASYNC = [
-    _checkpointer_postgres_aio,
-    _checkpointer_postgres_aio_pipe,
-    _checkpointer_postgres_aio_pool,
-]
-
-
-class State(TypedDict):
-    messages: Annotated[list[AnyMessage], add_messages]
-    notes: Annotated[list[str], operator.add]
-
-
-class DeltaState(TypedDict):
-    messages: Annotated[list[AnyMessage], DeltaChannel(_messages_delta_reducer)]
-
-
-def _reply(ask: bool):
-    def reply(state: dict) -> dict:
-        n = len(state["messages"])
-        answer = interrupt("approve?") if ask else "ok"
-        return {"messages": [AIMessage(f"{answer} {n}", id=f"reply-{n}")]}
-
-    return reply
-
-
-def _graph(
-    checkpointer: Any,
-    *,
-    ask: bool = False,
-    fail: set[str] | None = None,
-    calls: dict[str, int] | None = None,
-    before_fail: Callable[[], None] | None = None,
-) -> Any:
-    def note(name: str):
-        def node(state: State) -> dict:
-            if calls is not None:
-                calls[name] = calls.get(name, 0) + 1
-            if fail is not None and name in fail:
-                if before_fail is not None:
-                    before_fail()
-                fail.discard(name)
-                raise ValueError(f"{name} failed")
-            return {"notes": [name]}
-
-        return node
-
-    builder = StateGraph(State)
-    builder.add_node("left", note("left"))
-    builder.add_node("right", note("right"))
-    builder.add_node("reply", _reply(ask))
-    builder.add_edge(START, "left")
-    builder.add_edge(START, "right")
-    builder.add_edge(["left", "right"], "reply")
-    return builder.compile(checkpointer=checkpointer)
-
-
-def _counting_subgraph(name: str, *, checkpointer: bool | None) -> Any:
-    class Calls(TypedDict):
-        messages: Annotated[list[AnyMessage], add_messages]
-        calls: Annotated[list[str], operator.add]
-
-    def count(state: Calls) -> dict:
-        n = len(state["messages"])
-        reply = AIMessage(f"{name} call {len(state['calls']) + 1}", id=f"{name}-{n}")
-        return {"calls": [name], "messages": [reply]}
-
-    builder = StateGraph(Calls)
-    builder.add_node("count", count)
-    builder.add_edge(START, "count")
-    return builder.compile(checkpointer=checkpointer)
-
-
-def _delta_graph(checkpointer: Any) -> Any:
-    builder = StateGraph(DeltaState)
-    builder.add_node("reply", _reply(ask=False))
-    builder.add_edge(START, "reply")
-    return builder.compile(checkpointer=checkpointer)
-
-
-def _config(thread_id: str) -> RunnableConfig:
-    return {"configurable": {"thread_id": thread_id}}
-
-
-def _say(i: int) -> dict:
-    return {"messages": [HumanMessage(f"hi {i}", id=f"hi-{i}")]}
-
-
-def _checkpoint_ids(checkpointer: Any, thread_id: str) -> list[str]:
-    return [c.checkpoint["id"] for c in checkpointer.list(_config(thread_id))]
-
-
-def _namespaces(checkpointer: Any, thread_id: str) -> list[str]:
-    return sorted(
-        c.config["configurable"]["checkpoint_ns"]
-        for c in checkpointer.list(_config(thread_id))
-    )
-
-
-async def _acheckpoint_ids(checkpointer: Any, thread_id: str) -> list[str]:
-    return [c.checkpoint["id"] async for c in checkpointer.alist(_config(thread_id))]
-
-
-def _parentless(snapshot: StateSnapshot) -> StateSnapshot:
-    return snapshot._replace(
-        parent_config=None,
-        tasks=tuple(
-            t._replace(state=_parentless(t.state))
-            if isinstance(t.state, StateSnapshot)
-            else t
-            for t in snapshot.tasks
-        ),
-    )
-
-
-def _run_once_after(
-    saver: PostgresSaver, sql: str, action: Callable[[], Any], *, nth: int = 1
-) -> None:
-    seen = 0
-    cursor = saver._cursor
-
-    class Hooked:
-        def __init__(self, cur: Any) -> None:
-            self.cur = cur
-
-        def __getattr__(self, name: str) -> Any:
-            return getattr(self.cur, name)
-
-        def execute(self, query: Any, params: Any = None, **kwargs: Any) -> None:
-            nonlocal seen
-            self.cur.execute(query, params, **kwargs)
-            if query is sql:
-                seen += 1
-                if seen == nth:
-                    action()
-
-    @contextmanager
-    def hooked(**kwargs: Any):
-        with cursor(**kwargs) as cur:
-            yield Hooked(cur)
-
-    saver._cursor = hooked
-
-
-@pytest.mark.parametrize("durability", ["sync", "async", "exit"])
-@pytest.mark.parametrize("make_checkpointer", SYNC)
-def test_keep_latest_keeps_the_state_and_the_thread_runs_on_like_its_twin(
-    make_checkpointer: Any, durability: str
-) -> None:
-    with make_checkpointer() as checkpointer:
-        graph = _graph(checkpointer)
-        for i in range(3):
-            for thread_id in ("pruned", "twin"):
-                graph.invoke(_say(i), _config(thread_id), durability=durability)
-        before = graph.get_state(_config("pruned"))
-
-        checkpointer.prune(["pruned"])
-
-        assert _checkpoint_ids(checkpointer, "pruned") == [
-            before.config["configurable"]["checkpoint_id"]
-        ]
-        assert graph.get_state(_config("pruned")) == _parentless(before)
-        for thread_id in ("pruned", "twin"):
-            graph.invoke(_say(3), _config(thread_id), durability=durability)
-        assert (
-            graph.get_state(_config("pruned")).values
-            == graph.get_state(_config("twin")).values
-        )
-
-
-@pytest.mark.parametrize("make_checkpointer", SYNC)
-def test_keep_latest_keeps_a_pending_interrupt_resumable(
-    make_checkpointer: Any,
-) -> None:
-    with make_checkpointer() as checkpointer:
-        graph = _graph(checkpointer, ask=True)
-        for thread_id in ("pruned", "twin"):
-            for i in range(2):
-                graph.invoke(_say(i), _config(thread_id))
-                graph.invoke(Command(resume=f"yes {i}"), _config(thread_id))
-            graph.invoke(_say(2), _config(thread_id))
-        before = graph.get_state(_config("pruned"))
-        assert before.interrupts
-
-        checkpointer.prune(["pruned"])
-
-        assert graph.get_state(_config("pruned")) == _parentless(before)
-        for thread_id in ("pruned", "twin"):
-            graph.invoke(Command(resume="yes 2"), _config(thread_id))
-        assert (
-            graph.get_state(_config("pruned")).values
-            == graph.get_state(_config("twin")).values
-        )
-
-
-@pytest.mark.parametrize("make_checkpointer", SYNC)
-def test_keep_latest_keeps_writes_of_tasks_that_finished_before_a_failure(
-    make_checkpointer: Any, monkeypatch: pytest.MonkeyPatch
-) -> None:
-    with make_checkpointer() as checkpointer:
-        calls: dict[str, int] = {}
-        fail: set[str] = set()
-        left_persisted = Event()
-        put_writes = checkpointer.put_writes
-
-        def persist(config, writes, task_id, task_path=""):
-            put_writes(config, writes, task_id, task_path)
-            if ("notes", ["left"]) in writes:
-                left_persisted.set()
-
-        def wait_for_left() -> None:
-            assert left_persisted.wait(5), "left task writes were not persisted"
-
-        monkeypatch.setattr(checkpointer, "put_writes", persist)
-        graph = _graph(checkpointer, fail=fail, calls=calls, before_fail=wait_for_left)
-        for thread_id in ("pruned", "twin"):
-            for i in range(2):
-                graph.invoke(_say(i), _config(thread_id))
-            left_persisted.clear()
-            fail.add("right")
-            with pytest.raises(ValueError, match="right failed"):
-                graph.invoke(_say(2), _config(thread_id))
-            checkpoint = checkpointer.get_tuple(_config(thread_id))
-            assert checkpoint is not None
-            assert any(
-                channel == "notes" and value == ["left"]
-                for _, channel, value in checkpoint.pending_writes
-            )
-        before = graph.get_state(_config("pruned"))
-
-        checkpointer.prune(["pruned"])
-
-        assert graph.get_state(_config("pruned")) == _parentless(before)
-        left_runs = calls["left"]
-        graph.invoke(None, _config("pruned"))
-        assert calls["left"] == left_runs, "a task that had finished ran again"
-        graph.invoke(None, _config("twin"))
-        assert (
-            graph.get_state(_config("pruned")).values
-            == graph.get_state(_config("twin")).values
-        )
-
-
-@pytest.mark.parametrize("make_checkpointer", SYNC)
-def test_keep_latest_keeps_an_interrupted_subgraph_resumable(
-    make_checkpointer: Any,
-) -> None:
-    with make_checkpointer() as checkpointer:
-        sub = StateGraph(State)
-        sub.add_node("reply", _reply(ask=True))
-        sub.add_edge(START, "reply")
-        parent = StateGraph(State)
-        parent.add_node("sub", sub.compile())
-        parent.add_edge(START, "sub")
-        graph = parent.compile(checkpointer=checkpointer)
-        for thread_id in ("pruned", "twin"):
-            for i in range(2):
-                graph.invoke(_say(i), _config(thread_id))
-                graph.invoke(Command(resume=f"yes {i}"), _config(thread_id))
-            graph.invoke(_say(2), _config(thread_id))
-        before = graph.get_state(_config("pruned"), subgraphs=True)
-        interrupted = before.tasks[0].state.config["configurable"]["checkpoint_ns"]
-
-        checkpointer.prune(["pruned"])
-
-        assert _namespaces(checkpointer, "pruned") == ["", interrupted]
-        assert graph.get_state(_config("pruned"), subgraphs=True) == _parentless(before)
-        for thread_id in ("pruned", "twin"):
-            graph.invoke(Command(resume="yes 2"), _config(thread_id))
-        assert (
-            graph.get_state(_config("pruned")).values
-            == graph.get_state(_config("twin")).values
-        )
-
-
-@pytest.mark.parametrize("durability", ["sync", "async", "exit"])
-@pytest.mark.parametrize("make_checkpointer", SYNC)
-def test_keep_latest_keeps_a_checkpointer_true_subgraph_but_not_finished_calls(
-    make_checkpointer: Any, durability: str
-) -> None:
-    with make_checkpointer() as checkpointer:
-        parent = StateGraph(State)
-        parent.add_node("memory", _counting_subgraph("memory", checkpointer=True))
-        parent.add_node("call", _counting_subgraph("call", checkpointer=None))
-        parent.add_edge(START, "memory")
-        parent.add_edge("memory", "call")
-        graph = parent.compile(checkpointer=checkpointer)
-        for i in range(3):
-            for thread_id in ("pruned", "twin"):
-                graph.invoke(_say(i), _config(thread_id), durability=durability)
-
-        checkpointer.prune(["pruned"])
-
-        assert _namespaces(checkpointer, "pruned") == ["", "memory"]
-        for thread_id in ("pruned", "twin"):
-            graph.invoke(_say(3), _config(thread_id), durability=durability)
-        assert (
-            graph.get_state(_config("pruned")).values
-            == graph.get_state(_config("twin")).values
-        )
-
-
-def test_keep_latest_keeps_a_turn_saved_after_it_read_the_heads() -> None:
-    with (
-        _checkpointer_postgres() as checkpointer,
-        PostgresSaver.from_conn_string(
-            DEFAULT_POSTGRES_URI + checkpointer.conn.info.dbname
-        ) as pruner,
-    ):
-        graph = _graph(checkpointer)
-        for i in range(3):
-            for thread_id in ("pruned", "twin"):
-                graph.invoke(_say(i), _config(thread_id))
-        _run_once_after(
-            pruner, PRUNE_HEADS_SQL, lambda: graph.invoke(_say(3), _config("pruned"))
-        )
-
-        pruner.prune(["pruned"])
-
-        graph.invoke(_say(3), _config("twin"))
-        assert (
-            graph.get_state(_config("pruned")).values
-            == graph.get_state(_config("twin")).values
-        )
-
-
-def test_keep_latest_refuses_a_thread_that_switches_to_a_delta_channel_mid_batch() -> (
-    None
-):
-    with (
-        _checkpointer_postgres() as checkpointer,
-        PostgresSaver.from_conn_string(
-            DEFAULT_POSTGRES_URI + checkpointer.conn.info.dbname
-        ) as pruner,
-    ):
-        graph, delta_graph = _graph(checkpointer), _delta_graph(checkpointer)
-        for i in range(3):
-            for thread_id in ("switched", "twin"):
-                graph.invoke(_say(i), _config(thread_id))
-        _run_once_after(
-            pruner,
-            PRUNE_DELTA_THREADS_SQL,
-            lambda: delta_graph.invoke(_say(3), _config("switched")),
-        )
-
-        with pytest.raises(NotImplementedError, match="switched"):
-            pruner.prune(["switched"])
-
-        delta_graph.invoke(_say(3), _config("twin"))
-        assert (
-            delta_graph.get_state(_config("switched")).values
-            == delta_graph.get_state(_config("twin")).values
-        )
-
-
-def test_keep_latest_keeps_a_delta_channel_turn_saved_after_the_thread_check() -> None:
-    with (
-        _checkpointer_postgres() as checkpointer,
-        PostgresSaver.from_conn_string(
-            DEFAULT_POSTGRES_URI + checkpointer.conn.info.dbname
-        ) as pruner,
-    ):
-        graph, delta_graph = _graph(checkpointer), _delta_graph(checkpointer)
-        for i in range(3):
-            for thread_id in ("switched", "twin"):
-                graph.invoke(_say(i), _config(thread_id))
-        head = _checkpoint_ids(checkpointer, "switched")[0]
-        _run_once_after(
-            pruner,
-            PRUNE_DELTA_THREADS_SQL,
-            lambda: delta_graph.invoke(_say(3), _config("switched")),
-            nth=2,
-        )
-
-        pruner.prune(["switched"])
-
-        assert _checkpoint_ids(checkpointer, "switched")[-1] == head
-        delta_graph.invoke(_say(3), _config("twin"))
-        assert (
-            delta_graph.get_state(_config("switched")).values
-            == delta_graph.get_state(_config("twin")).values
-        )
-
-
-@pytest.mark.parametrize("make_checkpointer", SYNC)
-def test_keep_latest_refuses_a_batch_with_a_delta_channel_thread(
-    make_checkpointer: Any,
-) -> None:
-    with make_checkpointer() as checkpointer:
-        graph, delta_graph = _graph(checkpointer), _delta_graph(checkpointer)
-        for i in range(3):
-            graph.invoke(_say(i), _config("ordinary"))
-            delta_graph.invoke(_say(i), _config("delta"))
-        before = {t: _checkpoint_ids(checkpointer, t) for t in ("ordinary", "delta")}
-        delta_before = delta_graph.get_state(_config("delta"))
-
-        with pytest.raises(NotImplementedError, match="delta"):
-            checkpointer.prune(["ordinary", "delta"])
-
-        assert {t: _checkpoint_ids(checkpointer, t) for t in before} == before
-        assert delta_graph.get_state(_config("delta")) == delta_before
-
-
-@NEEDS_CONTEXTVARS
-@pytest.mark.parametrize("make_checkpointer", ASYNC)
-async def test_akeep_latest_keeps_a_pending_interrupt_resumable(
-    make_checkpointer: Any,
-) -> None:
-    async with make_checkpointer() as checkpointer:
-        graph = _graph(checkpointer, ask=True)
-        for thread_id in ("pruned", "twin"):
-            for i in range(2):
-                await graph.ainvoke(_say(i), _config(thread_id))
-                await graph.ainvoke(Command(resume=f"yes {i}"), _config(thread_id))
-            await graph.ainvoke(_say(2), _config(thread_id))
-        before = await graph.aget_state(_config("pruned"))
-
-        await checkpointer.aprune(["pruned"])
-
-        assert await _acheckpoint_ids(checkpointer, "pruned") == [
-            before.config["configurable"]["checkpoint_id"]
-        ]
-        assert await graph.aget_state(_config("pruned")) == _parentless(before)
-        for thread_id in ("pruned", "twin"):
-            await graph.ainvoke(Command(resume="yes 2"), _config(thread_id))
-        assert (await graph.aget_state(_config("pruned"))).values == (
-            await graph.aget_state(_config("twin"))
-        ).values
-
-
-@pytest.mark.parametrize("make_checkpointer", ASYNC)
-async def test_akeep_latest_refuses_a_batch_with_a_delta_channel_thread(
-    make_checkpointer: Any,
-) -> None:
-    async with make_checkpointer() as checkpointer:
-        graph, delta_graph = _graph(checkpointer), _delta_graph(checkpointer)
-        for i in range(3):
-            await graph.ainvoke(_say(i), _config("ordinary"))
-            await delta_graph.ainvoke(_say(i), _config("delta"))
-        before = {
-            t: await _acheckpoint_ids(checkpointer, t) for t in ("ordinary", "delta")
-        }
-
-        with pytest.raises(NotImplementedError, match="delta"):
-            await checkpointer.aprune(["ordinary", "delta"])
-
-        assert {t: await _acheckpoint_ids(checkpointer, t) for t in before} == before

libs/langgraph/tests/test_remote_graph.py

@@ -819,50 +819,6 @@ async def test_astream():
     ]
 
 
-_CALLER_CONFIG: RunnableConfig = {
-    "configurable": {"thread_id": "thread_1", "checkpoint_ns": "outer:123"}
-}
-_SUBGRAPH_PARTS = [
-    StreamPart(event="values|sub:abc", data={"chunk": "inner"}),
-    StreamPart(event="values", data={"chunk": "root"}),
-]
-_CALLER_PREFIXED = [
-    (("outer:123", "sub:abc"), {"chunk": "inner"}),
-    (("outer:123",), {"chunk": "root"}),
-]
-
-
-def test_stream_subgraphs_keeps_caller_namespace():
-    mock_sync_client = MagicMock()
-    mock_sync_client.runs.stream.return_value = _SUBGRAPH_PARTS
-    remote_pregel = RemoteGraph("test_graph_id", sync_client=mock_sync_client)
-
-    stream_parts = list(
-        remote_pregel.stream(
-            {"input": "data"}, _CALLER_CONFIG, stream_mode="values", subgraphs=True
-        )
-    )
-
-    assert stream_parts == _CALLER_PREFIXED
-
-
-async def test_astream_subgraphs_keeps_caller_namespace():
-    mock_async_client = MagicMock()
-    async_iter = MagicMock()
-    async_iter.__aiter__.return_value = _SUBGRAPH_PARTS
-    mock_async_client.runs.stream.return_value = async_iter
-    remote_pregel = RemoteGraph("test_graph_id", client=mock_async_client)
-
-    stream_parts = [
-        part
-        async for part in remote_pregel.astream(
-            {"input": "data"}, _CALLER_CONFIG, stream_mode="values", subgraphs=True
-        )
-    ]
-
-    assert stream_parts == _CALLER_PREFIXED
-
-
 def test_invoke():
     # set up test
     mock_sync_client = MagicMock()

libs/langgraph/tests/test_retry.py

@@ -2097,47 +2097,6 @@ def test_graph_error_handler_can_route_with_command():
     assert result["foo"] == "handled_next"
 
 
-# Each case runs the failing node on the executor path instead of the
-# single-task fast path.
-@pytest.mark.parametrize(
-    ("parallel", "stream_mode", "subgraphs"),
-    [
-        (False, "custom", False),
-        (False, "messages", False),
-        (False, "values", True),
-        (True, "values", False),
-    ],
-)
-def test_graph_error_handler_recovers_on_the_executor_path(
-    parallel: bool, stream_mode: str, subgraphs: bool
-) -> None:
-    class State(TypedDict):
-        x: str
-
-    def failing(state: State) -> State:
-        raise ValueError("boom")
-
-    def handler(state: State) -> Command:
-        return Command(update={"x": "handled"}, goto=END)
-
-    builder = (
-        StateGraph(State)
-        .add_node("failing", failing, error_handler=handler)
-        .add_edge(START, "failing")
-    )
-    if parallel:
-        builder.add_node("sibling", lambda state: {}).add_edge(START, "sibling")
-    graph = builder.compile()
-
-    chunks = list(
-        graph.stream(
-            {"x": ""}, stream_mode=[stream_mode, "values"], subgraphs=subgraphs
-        )
-    )
-
-    assert [c[-1] for c in chunks if c[-2] == "values"][-1] == {"x": "handled"}
-
-
 def test_graph_error_handler_failure_fails_run():
     class State(TypedDict):
         foo: str

libs/langgraph/tests/test_time_travel.py

@@ -1177,43 +1177,6 @@ def test_subgraph_interrupt_resume_with_explicit_head_checkpoint_id(
     assert result["value"] == ["sub_a", "human:answer", "sub_b"]
 
 
-def test_subgraph_replay_reasks_answered_parallel_interrupt(
-    sync_checkpointer: BaseCheckpointSaver,
-) -> None:
-    """Replaying a subgraph checkpoint asks its step's questions again, including
-    one already answered. An update checkpoint replays in place instead of
-    forking, so its tasks keep their ids and its saved answers could be reused."""
-
-    subgraph = (
-        StateGraph(State)
-        .add_node("a", lambda s: {"value": [f"a:{interrupt('a')}"]})
-        .add_node("b", lambda s: {"value": [f"b:{interrupt('b')}"]})
-        .add_edge(START, "a")
-        .add_edge(START, "b")
-        .compile(checkpointer=True)
-    )
-    graph = (
-        StateGraph(State)
-        .add_node("subgraph_node", subgraph)
-        .add_edge(START, "subgraph_node")
-        .compile(checkpointer=sync_checkpointer)
-    )
-    config = {"configurable": {"thread_id": "1"}}
-
-    def subgraph_head() -> RunnableConfig:
-        return graph.get_state(config, subgraphs=True).tasks[0].state.config
-
-    graph.invoke({"value": []}, config)
-    graph.update_state(subgraph_head(), {"value": ["u"]}, as_node="__start__")
-    result = graph.invoke(None, config)
-    question_a = next(i for i in result["__interrupt__"] if i.value == "a")
-    graph.invoke(Command(resume={question_a.id: "yes"}), config)
-
-    result = graph.invoke(None, subgraph_head())
-
-    assert sorted(i.value for i in result["__interrupt__"]) == ["a", "b"]
-
-
 def test_subgraph_replay_loads_accumulated_state_then_resume(
     sync_checkpointer: BaseCheckpointSaver,
 ) -> None:

libs/langgraph/tests/test_utils.py

@@ -1,6 +1,4 @@
-import copy
 import functools
-import pickle
 import sys
 import uuid
 from collections.abc import Callable
@@ -27,7 +25,6 @@ from pydantic import BaseModel, Field
 from typing_extensions import NotRequired, Required, TypedDict
 
 from langgraph._internal._config import (
-    DEFAULT_RECURSION_LIMIT,
     _is_not_empty,
     _merge_callbacks,
     ensure_config,
@@ -623,30 +620,6 @@ def test_merge_configs_merges_metadata_lc_versions() -> None:
     assert merged["metadata"]["lc_agent_name"] == "agent"
 
 
-@pytest.mark.parametrize(
-    "rebuild",
-    [
-        lambda config: config,
-        copy.deepcopy,
-        lambda config: pickle.loads(pickle.dumps(config)),
-    ],
-    ids=["as_is", "deepcopy", "pickle"],
-)
-def test_merge_configs_skips_the_injected_default_recursion_limit(
-    rebuild: Callable[[RunnableConfig], RunnableConfig],
-) -> None:
-    merged = merge_configs({"recursion_limit": 50}, rebuild(ensure_config()))
-    assert merged["recursion_limit"] == 50
-
-
-def test_merge_configs_applies_an_explicit_recursion_limit_equal_to_default() -> None:
-    explicit_default = int(DEFAULT_RECURSION_LIMIT)
-    merged = merge_configs(
-        {"recursion_limit": 50}, {"recursion_limit": explicit_default}
-    )
-    assert merged["recursion_limit"] == explicit_default
-
-
 def test_ensure_config_merges_metadata_lc_versions() -> None:
     a = {
         "metadata": {
@@ -799,15 +772,6 @@ def test_ensure_config_tags_concat_preserves_order_and_duplicates() -> None:
     assert merged["tags"] == ["shared", "alpha", "shared", "beta"]
 
 
-def test_ensure_config_skips_tags_inherited_from_ambient() -> None:
-    token = var_child_runnable_config.set({"tags": ["inherited"]})
-    try:
-        merged = ensure_config({"tags": ["inherited", "own"]})
-    finally:
-        var_child_runnable_config.reset(token)
-    assert merged["tags"] == ["inherited", "own"]
-
-
 def test_ensure_config_merges_callbacks_across_configs() -> None:
     a_cb = _TrackingCB("a")
     b_cb = _TrackingCB("b")

libs/langgraph/uv.lock

@@ -1,5 +1,5 @@
 version = 1
-revision = 5
+revision = 3
 requires-python = ">=3.10"
 resolution-markers = [
     "python_full_version >= '3.15'",
@@ -202,11 +202,11 @@ wheels = [
 
 [[package]]
 name = "certifi"
-version = "2026.10.19"
+version = "2026.1.4"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/a6/bd/1436c50cc46699de0230fbaacc1d1de7bfec413176099949e9d5112e88f2/certifi-2026.10.19.tar.gz", hash = "sha256:035c1e85572b141bf1c3a3eff0e33a8eb74917522f2559075ff8d2fea780a1ae", size = 137598, upload-time = "2026-10-20T02:24:16.604Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/e0/2d/a891ca51311197f6ad14a7ef42e2399f36cf2f9bd44752b3dc4eab60fdc5/certifi-2026.1.4.tar.gz", hash = "sha256:ac726dd470482006e014ad384921ed6438c457018f4b3d204aea4281258b2120", size = 154268, upload-time = "2026-01-04T02:42:41.825Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c4/51/29046e48f693c54e5b7412216d447a1d8362c9653148d98c02cdf65fa733/certifi-2026.10.19-py3-none-any.whl", hash = "sha256:42d35340cc5b9ba78e818ddbff0c5b1c2b779de448a340fd1b989f5fa8670e1b", size = 136464, upload-time = "2026-10-20T02:24:15.072Z" },
+    { url = "https://files.pythonhosted.org/packages/e6/ad/3cc14f097111b4de0040c83a525973216457bbeeb63739ef1ed275c1c021/certifi-2026.1.4-py3-none-any.whl", hash = "sha256:9943707519e4add1115f44c2bc244f782c0249876bf51b6599fee1ffbedd685c", size = 152900, upload-time = "2026-01-04T02:42:40.15Z" },
 ]
 
 [[package]]
@@ -931,6 +931,18 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/d2/23/408243171aa9aaba178d3e2559159c24c1171a641aa83b67bdd3394ead8e/idna-3.15-py3-none-any.whl", hash = "sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8", size = 72340, upload-time = "2026-05-12T22:45:55.733Z" },
 ]
 
+[[package]]
+name = "importlib-metadata"
+version = "8.7.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "zipp" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/f3/49/3b30cad09e7771a4982d9975a8cbf64f00d4a1ececb53297f1d9a7be1b10/importlib_metadata-8.7.1.tar.gz", hash = "sha256:49fef1ae6440c182052f407c8d34a68f72efc36db9ca90dc0113398f2fdde8bb", size = 57107, upload-time = "2025-12-21T10:00:19.278Z" }
+wheels = [
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@@ -1823,7 +1835,7 @@ test = [
 
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@@ -46,7 +46,7 @@ test = [
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-    "psycopg[binary]",
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libs/sdk-py/CHANGELOG.md

@@ -34,14 +34,6 @@
 - **`thread.output`** — awaitable that resolves to the terminal thread state
   `values` dict after the run lifecycle completes.
 
-- **`Priority` (beta)** — register an async function with `@priority.assign`
-  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`, `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.
-
 ### Changed
 
 - `client.threads.stream()` now accepts `transport="sse"` (default) or

libs/sdk-py/langgraph_sdk/__init__.py

@@ -2,19 +2,14 @@ from langgraph_sdk.auth import Auth
 from langgraph_sdk.client import get_client, get_sync_client
 from langgraph_sdk.encryption import Encryption
 from langgraph_sdk.encryption.types import DecryptResult, EncryptionContext
-from langgraph_sdk.priority import Priority
-from langgraph_sdk.priority.types import PriorityContext, PrioritySettings
 
-__version__ = "0.4.10"
+__version__ = "0.4.7"
 
 __all__ = [
     "Auth",
     "DecryptResult",
     "Encryption",
     "EncryptionContext",
-    "Priority",
-    "PriorityContext",
-    "PrioritySettings",
     "get_client",
     "get_sync_client",
 ]

libs/sdk-py/langgraph_sdk/_async/cron.py

@@ -104,7 +104,7 @@ class CronClient:
 
             webhook: Webhook to call after LangGraph API call is done.
             multitask_strategy: Multitask strategy to use.
-                Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
+                Must be one of 'reject', 'interrupt', 'rollback', 'enqueue', or 'insert'.
             end_time: The time to stop running the cron job. If not provided, the cron job will run indefinitely.
             enabled: Whether the cron job is enabled or not.
             timezone: IANA timezone for the cron schedule. Accepts a string (e.g. 'America/New_York') or a ``datetime.tzinfo`` instance (e.g. ``ZoneInfo("America/New_York")``).
@@ -222,7 +222,7 @@ class CronClient:
                 after execution. 'keep' creates a new thread for each execution but does not
                 clean them up. Clients are responsible for cleaning up kept threads.
             multitask_strategy: Multitask strategy to use.
-                Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
+                Must be one of 'reject', 'interrupt', 'rollback', 'enqueue', or 'insert'.
             end_time: The time to stop running the cron job. If not provided, the cron job will run indefinitely.
             enabled: Whether the cron job is enabled or not.
             timezone: IANA timezone for the cron schedule. Accepts a string (e.g. 'America/New_York') or a ``datetime.tzinfo`` instance (e.g. ``ZoneInfo("America/New_York")``).

libs/sdk-py/langgraph_sdk/_async/http.py

@@ -179,7 +179,7 @@ class HttpClient:
                 return await self.request_reconnect(
                     loc,
                     "GET",
-                    headers=headers,
+                    headers=request_headers,
                     # don't pass on_response so it's only called once
                     reconnect_limit=reconnect_limit - 1,
                 )
@@ -217,7 +217,7 @@ class HttpClient:
             current_headers = dict(
                 request_headers if reconnect_path is None else reconnect_headers
             )
-            if last_event_id:
+            if last_event_id is not None:
                 current_headers["Last-Event-ID"] = last_event_id
 
             current_method = method if reconnect_path is None else "GET"

libs/sdk-py/langgraph_sdk/_async/runs.py

@@ -99,7 +99,6 @@ class RunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
         version: Literal["v1"] = "v1",
     ) -> AsyncIterator[StreamPart]: ...
 
@@ -132,7 +131,6 @@ class RunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
         version: Literal["v2"],
     ) -> AsyncIterator[StreamPartV2]: ...
 
@@ -149,7 +147,6 @@ class RunsClient:
         stream_resumable: bool = False,
         metadata: Mapping[str, Any] | None = None,
         config: Config | None = None,
-        context: Context | None = None,
         checkpoint_during: bool | None = None,
         interrupt_before: All | Sequence[str] | None = None,
         interrupt_after: All | Sequence[str] | None = None,
@@ -163,7 +160,6 @@ class RunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
         version: Literal["v1"] = "v1",
     ) -> AsyncIterator[StreamPart]: ...
 
@@ -180,7 +176,6 @@ class RunsClient:
         stream_resumable: bool = False,
         metadata: Mapping[str, Any] | None = None,
         config: Config | None = None,
-        context: Context | None = None,
         checkpoint_during: bool | None = None,
         interrupt_before: All | Sequence[str] | None = None,
         interrupt_after: All | Sequence[str] | None = None,
@@ -194,7 +189,6 @@ class RunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
         version: Literal["v2"],
     ) -> AsyncIterator[StreamPartV2]: ...
 
@@ -258,7 +252,7 @@ class RunsClient:
                 Must be one of 'delete' or 'keep'.
             webhook: Webhook to call after LangGraph API call is done.
             multitask_strategy: Multitask strategy to use.
-                Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
+                Must be one of 'reject', 'interrupt', 'rollback', 'enqueue', or 'insert'.
             if_not_exists: How to handle missing thread. Defaults to 'reject'.
                 Must be either 'reject' (raise error if missing), or 'create' (create new thread).
             after_seconds: The number of seconds to wait before starting the run.
@@ -391,7 +385,6 @@ class RunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
     ) -> Run: ...
 
     @overload
@@ -421,7 +414,6 @@ class RunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
     ) -> Run: ...
 
     async def create(
@@ -476,7 +468,7 @@ class RunsClient:
             interrupt_after: Nodes to Nodes to interrupt immediately after they get executed.
             webhook: Webhook to call after LangGraph API call is done.
             multitask_strategy: Multitask strategy to use.
-                Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
+                Must be one of 'reject', 'interrupt', 'rollback', 'enqueue', or 'insert'.
             on_completion: Whether to delete or keep the thread created for a stateless run.
                 Must be one of 'delete' or 'keep'.
             if_not_exists: How to handle missing thread. Defaults to 'reject'.
@@ -655,7 +647,6 @@ class RunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
     ) -> builtins.list[dict] | dict[str, Any]: ...
 
     @overload
@@ -682,7 +673,6 @@ class RunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
     ) -> builtins.list[dict] | dict[str, Any]: ...
 
     async def wait(
@@ -736,7 +726,7 @@ class RunsClient:
             on_completion: Whether to delete or keep the thread created for a stateless run.
                 Must be one of 'delete' or 'keep'.
             multitask_strategy: Multitask strategy to use.
-                Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
+                Must be one of 'reject', 'interrupt', 'rollback', 'enqueue', or 'insert'.
             if_not_exists: How to handle missing thread. Defaults to 'reject'.
                 Must be either 'reject' (raise error if missing), or 'create' (create new thread).
             after_seconds: The number of seconds to wait before starting the run.

libs/sdk-py/langgraph_sdk/_async/stream.py

@@ -15,7 +15,6 @@ from __future__ import annotations
 
 import asyncio
 import contextlib
-import logging
 import random
 from collections.abc import AsyncGenerator, AsyncIterator, Generator, Mapping
 from dataclasses import dataclass, field
@@ -37,11 +36,6 @@ from langgraph_sdk.stream.decoders import (
     ToolCallsDecoder,
     validate_interleave_channels,
 )
-from langgraph_sdk.stream.errors import (
-    is_non_retryable_stream_error,
-    protocol_error,
-    stream_error_frame,
-)
 from langgraph_sdk.stream.subscription import compute_union_filter, infer_channel
 from langgraph_sdk.stream.transport import (
     AsyncProtocolTransport,
@@ -50,8 +44,6 @@ from langgraph_sdk.stream.transport import (
     ProtocolWebSocketTransport,
 )
 
-logger = logging.getLogger(__name__)
-
 
 class InterruptPayload(TypedDict):
     """Payload surfaced when the server requests human input for a thread."""
@@ -201,7 +193,6 @@ class RunModule:
             if not gate.done():
                 gate.set_result(None)
             self._owner._run_seen = True
-            self._owner._ensure_lifecycle_watcher_running()
             return result
         except BaseException as err:
             # Why: gate MUST reject on any exit type, including CancelledError,
@@ -1212,7 +1203,6 @@ class AsyncThreadStream:
         # observes a `completed`/`errored` event.
         self._interrupts_lock = asyncio.Lock()
         self._lifecycle_watcher_task: asyncio.Task[None] | None = None
-        self._lifecycle_watcher_rejected = False
         self._lifecycle_watcher_handle: EventStreamHandle | None = None
         self._lifecycle_cursor: int | None = None
         self._lifecycle_max_reconnect_attempts = 5
@@ -1271,11 +1261,8 @@ class AsyncThreadStream:
         # Create the run-done future here (async context guarantees a running loop).
         self._run_done = asyncio.get_running_loop().create_future()
         # Start the lifecycle watcher immediately so reattach and thread.output
-        # work without a preceding run.start call. A minted thread_id names no
-        # thread until run.start creates it, and with custom auth a stream for a
-        # thread that doesn't exist yet fails, so run.start starts the watcher.
-        if self._explicit_thread_id:
-            self._ensure_lifecycle_watcher_running()
+        # work without a preceding run.start call.
+        self._ensure_lifecycle_watcher_running()
         return self
 
     async def __aexit__(self, exc_type: Any, exc: Any, tb: Any) -> None:
@@ -1643,13 +1630,6 @@ class AsyncThreadStream:
                 async for event in self._dedup_iter(shared.events):
                     if self._closed:
                         break
-                    if (frame_error := stream_error_frame(event)) is not None:
-                        logger.warning(
-                            "Thread %s event stream failed: %s",
-                            self.thread_id,
-                            frame_error,
-                        )
-                        continue
                     self._observe_event(event)
                     for sub in list(self._subscriptions.values()):
                         if matches_subscription(event, sub.params):
@@ -1675,7 +1655,6 @@ class AsyncThreadStream:
                 if (
                     err is not None
                     and not isinstance(err, asyncio.CancelledError)
-                    and not is_non_retryable_stream_error(err)
                     and not self._closed
                 ):
                     with contextlib.suppress(Exception):
@@ -1702,8 +1681,7 @@ class AsyncThreadStream:
 
         Returns:
             `True` if a new stream was opened (caller should resume fanout),
-            `False` if all reconnect attempts were exhausted, the server
-            rejected the stream with a non-retryable 4xx, or the controller
+            `False` if all reconnect attempts were exhausted or the controller
             was closed in the meantime.
         """
         if self._transport is None:
@@ -1724,9 +1702,7 @@ class AsyncThreadStream:
                 await new_stream.ready
             except asyncio.CancelledError:
                 raise
-            except Exception as err:
-                if is_non_retryable_stream_error(err):
-                    return False
+            except Exception:
                 await self._reconnect_sleep(attempt)
                 continue
             self._shared_stream = new_stream
@@ -1824,7 +1800,9 @@ class AsyncThreadStream:
             # 202/204 — no body. Caller gets an empty result.
             return {}
         if response.get("type") == "error":
-            raise protocol_error(response)
+            code = response.get("error", "unknown")
+            message = response.get("message", "")
+            raise RuntimeError(f"Protocol error [{code}]: {message}")
         meta = response.get("meta")
         if isinstance(meta, dict):
             applied_through_seq = meta.get("applied_through_seq")
@@ -1848,15 +1826,8 @@ class AsyncThreadStream:
             await asyncio.wait_for(asyncio.shield(gate), timeout=timeout)
 
     def _ensure_lifecycle_watcher_running(self) -> None:
-        task = self._lifecycle_watcher_task
-        if task is not None and not self._lifecycle_watcher_rejected:
+        if self._lifecycle_watcher_task is not None:
             return
-        if task is not None:
-            # A 4xx stopped the watcher before this run started, typically the
-            # 404 for a thread this run.start just created, so the result it
-            # left isn't this run's.
-            self._run_done = asyncio.get_running_loop().create_future()
-            self._lifecycle_watcher_rejected = False
         self._lifecycle_watcher_task = asyncio.create_task(
             self._run_lifecycle_watcher()
         )
@@ -1879,11 +1850,7 @@ class AsyncThreadStream:
         if self._transport is None:
             return
         reconnect_attempts = 0
-        frame_error: RuntimeError | None = None
         while not self._closed:
-            # A stream opened before run.start can 404 for the thread that
-            # run.start creates, so it gets one more try once a run has started.
-            opened_before_run = not self._run_seen
             try:
                 handle = self._transport.open_event_stream(
                     self._lifecycle_stream_params()
@@ -1893,7 +1860,6 @@ class AsyncThreadStream:
                 async for event in handle.events:
                     if self._closed:
                         return
-                    frame_error = stream_error_frame(event) or frame_error
                     self._observe_lifecycle_event(event)
                     await self._apply_lifecycle_event(event)
                 err = await handle.done
@@ -1902,43 +1868,38 @@ class AsyncThreadStream:
                     # event. Resolve `_run_done` as errored so awaiters of
                     # `thread.output` don't hang.
                     if err is None:
-                        self._fail_run_done(
-                            frame_error
-                            or RuntimeError(
-                                "lifecycle stream ended before terminal event"
+                        run_done = self._run_done
+                        if run_done is not None and not run_done.done():
+                            run_done.set_result(
+                                _RunTerminal(
+                                    status="errored",
+                                    error=RuntimeError(
+                                        "lifecycle stream ended before terminal event"
+                                    ),
+                                )
                             )
-                        )
                     return
                 reconnect_attempts += 1
-                if (
-                    is_non_retryable_stream_error(err)
-                    or reconnect_attempts > self._lifecycle_max_reconnect_attempts
-                ):
+                if reconnect_attempts > self._lifecycle_max_reconnect_attempts:
                     raise err
                 await asyncio.sleep(0.05)
             except asyncio.CancelledError:
                 raise
             except Exception as exc:
-                if is_non_retryable_stream_error(exc):
-                    if opened_before_run and self._run_seen:
-                        continue
-                    self._lifecycle_watcher_rejected = True
-                    self._fail_run_done(exc)
-                    return
                 reconnect_attempts += 1
                 if reconnect_attempts <= self._lifecycle_max_reconnect_attempts:
                     await asyncio.sleep(0.05)
                     continue
-                self._fail_run_done(
-                    frame_error or RuntimeError(f"Lifecycle transport failed: {exc}")
-                )
+                run_done = self._run_done
+                if run_done is not None and not run_done.done():
+                    run_done.set_result(
+                        _RunTerminal(
+                            status="errored",
+                            error=RuntimeError(f"Lifecycle transport failed: {exc}"),
+                        )
+                    )
                 return
 
-    def _fail_run_done(self, error: BaseException) -> None:
-        run_done = self._run_done
-        if run_done is not None and not run_done.done():
-            run_done.set_result(_RunTerminal(status="errored", error=error))
-
     async def _fetch_state(self) -> dict[str, Any]:
         """Fetch the current thread state from the REST endpoint."""
         return await self._http.get(

libs/sdk-py/langgraph_sdk/_sync/cron.py

@@ -96,7 +96,7 @@ class SyncCronClient:
             interrupt_after: Nodes to Nodes to interrupt immediately after they get executed.
             webhook: Webhook to call after LangGraph API call is done.
             multitask_strategy: Multitask strategy to use.
-                Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
+                Must be one of 'reject', 'interrupt', 'rollback', 'enqueue', or 'insert'.
             end_time: The time to stop running the cron job. If not provided, the cron job will run indefinitely.
             enabled: Whether the cron job is enabled. By default, it is considered enabled.
             timezone: IANA timezone for the cron schedule. Accepts a string (e.g. 'America/New_York') or a ``datetime.tzinfo`` instance (e.g. ``ZoneInfo("America/New_York")``).
@@ -212,7 +212,7 @@ class SyncCronClient:
                 after execution. 'keep' creates a new thread for each execution but does not
                 clean them up. Clients are responsible for cleaning up kept threads.
             multitask_strategy: Multitask strategy to use.
-                Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
+                Must be one of 'reject', 'interrupt', 'rollback', 'enqueue', or 'insert'.
             end_time: The time to stop running the cron job. If not provided, the cron job will run indefinitely.
             enabled: Whether the cron job is enabled. By default, it is considered enabled.
             timezone: IANA timezone for the cron schedule. Accepts a string (e.g. 'America/New_York') or a ``datetime.tzinfo`` instance (e.g. ``ZoneInfo("America/New_York")``).

libs/sdk-py/langgraph_sdk/_sync/http.py

@@ -179,7 +179,7 @@ class SyncHttpClient:
                 return self.request_reconnect(
                     loc,
                     "GET",
-                    headers=headers,
+                    headers=request_headers,
                     # don't pass on_response so it's only called once
                     reconnect_limit=reconnect_limit - 1,
                 )
@@ -219,7 +219,7 @@ class SyncHttpClient:
             current_headers = dict(
                 request_headers if reconnect_path is None else reconnect_headers
             )
-            if last_event_id:
+            if last_event_id is not None:
                 current_headers["Last-Event-ID"] = last_event_id
 
             current_method = method if reconnect_path is None else "GET"
@@ -286,9 +286,7 @@ class SyncHttpClient:
             break
 
 
-def _encode_json(json: Any) -> tuple[dict[str, str], bytes | None]:
-    if json is None:
-        return {}, None
+def _encode_json(json: Any) -> tuple[dict[str, str], bytes]:
     body = orjson.dumps(
         json,
         _orjson_default,

libs/sdk-py/langgraph_sdk/_sync/runs.py

@@ -80,7 +80,6 @@ class SyncRunsClient:
         command: Command | None = None,
         stream_mode: StreamMode | Sequence[StreamMode] = "values",
         stream_subgraphs: bool = False,
-        stream_resumable: bool = False,
         metadata: Mapping[str, Any] | None = None,
         config: Config | None = None,
         context: Context | None = None,
@@ -99,7 +98,6 @@ class SyncRunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
         version: Literal["v1"] = "v1",
     ) -> Iterator[StreamPart]: ...
 
@@ -113,7 +111,6 @@ class SyncRunsClient:
         command: Command | None = None,
         stream_mode: StreamMode | Sequence[StreamMode] = "values",
         stream_subgraphs: bool = False,
-        stream_resumable: bool = False,
         metadata: Mapping[str, Any] | None = None,
         config: Config | None = None,
         context: Context | None = None,
@@ -132,7 +129,6 @@ class SyncRunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
         version: Literal["v2"],
     ) -> Iterator[StreamPartV2]: ...
 
@@ -163,7 +159,6 @@ class SyncRunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
         version: Literal["v1"] = "v1",
     ) -> Iterator[StreamPart]: ...
 
@@ -194,7 +189,6 @@ class SyncRunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
         version: Literal["v2"],
     ) -> Iterator[StreamPartV2]: ...
 
@@ -258,7 +252,7 @@ class SyncRunsClient:
                 Must be one of 'delete' or 'keep'.
             webhook: Webhook to call after LangGraph API call is done.
             multitask_strategy: Multitask strategy to use.
-                Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
+                Must be one of 'reject', 'interrupt', 'rollback', 'enqueue', or 'insert'.
             if_not_exists: How to handle missing thread. Defaults to 'reject'.
                 Must be either 'reject' (raise error if missing), or 'create' (create new thread).
             after_seconds: The number of seconds to wait before starting the run.
@@ -386,7 +380,6 @@ class SyncRunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
     ) -> Run: ...
 
     @overload
@@ -416,7 +409,6 @@ class SyncRunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
     ) -> Run: ...
 
     def create(
@@ -471,7 +463,7 @@ class SyncRunsClient:
             interrupt_after: Nodes to Nodes to interrupt immediately after they get executed.
             webhook: Webhook to call after LangGraph API call is done.
             multitask_strategy: Multitask strategy to use.
-                Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
+                Must be one of 'reject', 'interrupt', 'rollback', 'enqueue', or 'insert'.
             on_completion: Whether to delete or keep the thread created for a stateless run.
                 Must be one of 'delete' or 'keep'.
             if_not_exists: How to handle missing thread. Defaults to 'reject'.
@@ -650,7 +642,6 @@ class SyncRunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
     ) -> builtins.list[dict] | dict[str, Any]: ...
 
     @overload
@@ -677,7 +668,6 @@ class SyncRunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-        durability: Durability | None = None,
     ) -> builtins.list[dict] | dict[str, Any]: ...
 
     def wait(
@@ -731,7 +721,7 @@ class SyncRunsClient:
             on_completion: Whether to delete or keep the thread created for a stateless run.
                 Must be one of 'delete' or 'keep'.
             multitask_strategy: Multitask strategy to use.
-                Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
+                Must be one of 'reject', 'interrupt', 'rollback', 'enqueue', or 'insert'.
             if_not_exists: How to handle missing thread. Defaults to 'reject'.
                 Must be either 'reject' (raise error if missing), or 'create' (create new thread).
             after_seconds: The number of seconds to wait before starting the run.
@@ -825,6 +815,7 @@ class SyncRunsClient:
             "checkpoint_during": checkpoint_during,
             "on_completion": on_completion,
             "after_seconds": after_seconds,
+            "raise_error": raise_error,
             "durability": durability,
             "langsmith_tracer": langsmith_tracing,
         }
@@ -839,7 +830,7 @@ class SyncRunsClient:
             if thread_id is not None
             else "/runs/wait"
         )
-        response = self.http.request_reconnect(
+        return self.http.request_reconnect(
             endpoint,
             "POST",
             json={k: v for k, v in payload.items() if v is not None},
@@ -847,16 +838,6 @@ class SyncRunsClient:
             headers=headers,
             on_response=on_response if on_run_created else None,
         )
-        if (
-            raise_error
-            and isinstance(response, dict)
-            and "__error__" in response
-            and isinstance(response["__error__"], dict)
-        ):
-            raise Exception(
-                f"{response['__error__'].get('error')}: {response['__error__'].get('message')}"
-            )
-        return response
 
     def list(
         self,

libs/sdk-py/langgraph_sdk/_sync/stream.py

@@ -34,11 +34,6 @@ from langgraph_sdk.stream.decoders import (
     ToolCallsDecoder,
     validate_interleave_channels,
 )
-from langgraph_sdk.stream.errors import (
-    is_non_retryable_stream_error,
-    protocol_error,
-    stream_error_frame,
-)
 from langgraph_sdk.stream.subscription import compute_union_filter, infer_channel
 from langgraph_sdk.stream.sync_controller import (
     SyncStreamController,
@@ -242,7 +237,6 @@ class SyncRunModule:
         controller = self._owner._controller
         if controller is not None and controller._run_start_gate is not None:
             controller._run_start_gate.set()
-        self._owner._ensure_lifecycle_watcher_running()
         return result
 
     def respond(
@@ -1117,7 +1111,6 @@ class SyncThreadStream:
         self.interrupted: bool = False
         self.interrupts: list[InterruptPayload] = []
         self._lifecycle_watcher_thread: threading.Thread | None = None
-        self._lifecycle_watcher_lock = threading.Lock()
         self._lifecycle_watcher_handle: SyncEventStreamHandle | None = None
         self._lifecycle_cursor: int | None = None
         self._lifecycle_max_reconnect_attempts = 5
@@ -1156,11 +1149,7 @@ class SyncThreadStream:
             self._transport, run_start_gate=run_start_gate
         )
         self._run_done = _BlockingResult()
-        # A minted thread_id names no thread until run.start creates it, and
-        # with custom auth a stream for a thread that doesn't exist yet fails,
-        # so run.start starts the watcher instead.
-        if self._explicit_thread_id:
-            self._ensure_lifecycle_watcher_running()
+        self._ensure_lifecycle_watcher_running()
         return self
 
     def __exit__(self, exc_type: Any, exc: Any, tb: Any) -> None:
@@ -1496,7 +1485,9 @@ class SyncThreadStream:
         if response is None:
             return {}
         if response.get("type") == "error":
-            raise protocol_error(response)
+            code = response.get("error", "unknown")
+            message = response.get("message", "")
+            raise RuntimeError(f"Protocol error [{code}]: {message}")
         meta = response.get("meta")
         if isinstance(meta, dict):
             applied_through_seq = meta.get("applied_through_seq")
@@ -1505,20 +1496,14 @@ class SyncThreadStream:
         return response.get("result", {})
 
     def _ensure_lifecycle_watcher_running(self) -> None:
-        with self._lifecycle_watcher_lock:
-            if self._lifecycle_watcher_thread is not None:
-                return
-            if self._run_done is not None and self._run_done.done():
-                # A 4xx stopped the watcher before this run started, typically
-                # the 404 for a thread this run.start just created, so the
-                # result it left isn't this run's.
-                self._run_done = _BlockingResult()
-            self._lifecycle_watcher_thread = threading.Thread(
-                target=self._run_lifecycle_watcher,
-                name="langgraph-sdk-sync-lifecycle",
-                daemon=True,
-            )
-            self._lifecycle_watcher_thread.start()
+        if self._lifecycle_watcher_thread is not None:
+            return
+        self._lifecycle_watcher_thread = threading.Thread(
+            target=self._run_lifecycle_watcher,
+            name="langgraph-sdk-sync-lifecycle",
+            daemon=True,
+        )
+        self._lifecycle_watcher_thread.start()
 
     def _observe_lifecycle_event(self, event: Event) -> None:
         seq = event.get("seq")
@@ -1538,11 +1523,7 @@ class SyncThreadStream:
         if self._transport is None:
             return
         reconnect_attempts = 0
-        frame_error: RuntimeError | None = None
         while not self._closed:
-            # A stream opened before run.start can 404 for the thread that
-            # run.start creates, so it gets one more try once a run has started.
-            opened_before_run = not self._run_seen
             try:
                 handle = self._transport.open_event_stream(
                     self._lifecycle_stream_params()
@@ -1551,64 +1532,28 @@ class SyncThreadStream:
                 for event in handle.events:
                     if self._closed:
                         return
-                    frame_error = stream_error_frame(event) or frame_error
                     self._observe_lifecycle_event(event)
                     self._apply_lifecycle_event(event)
                 err = handle.error()
                 if err is None:
-                    # Clean EOF: stream ended without a terminal lifecycle
-                    # event. Resolve `_run_done` as errored so `thread.output`
-                    # doesn't block forever.
-                    if not self._closed:
-                        self._fail_run_done(
-                            frame_error
-                            or RuntimeError(
-                                "lifecycle stream ended before terminal event"
-                            )
-                        )
                     return
                 reconnect_attempts += 1
-                if (
-                    is_non_retryable_stream_error(err)
-                    or reconnect_attempts > self._lifecycle_max_reconnect_attempts
-                ):
+                if reconnect_attempts > self._lifecycle_max_reconnect_attempts:
                     raise err
             except Exception as exc:
-                if is_non_retryable_stream_error(exc):
-                    if self._stop_rejected_lifecycle_watcher(
-                        exc, unless_run_started=opened_before_run
-                    ):
-                        return
-                    continue
                 reconnect_attempts += 1
                 if reconnect_attempts <= self._lifecycle_max_reconnect_attempts:
                     continue
-                self._fail_run_done(
-                    frame_error or RuntimeError(f"Lifecycle transport failed: {exc}")
-                )
+                run_done = self._run_done
+                if run_done is not None and not run_done.done():
+                    run_done.set_result(
+                        _RunTerminal(
+                            status="errored",
+                            error=RuntimeError(f"Lifecycle transport failed: {exc}"),
+                        )
+                    )
                 return
 
-    def _stop_rejected_lifecycle_watcher(
-        self, error: BaseException, *, unless_run_started: bool = False
-    ) -> bool:
-        """Fail the run with a 4xx `error` and clear the watcher, so run.start starts another.
-
-        Returns False, changing nothing, when `unless_run_started` is set and a
-        run has started. Holding the lock keeps a run.start from seeing this
-        watcher as still running once it has decided to stop.
-        """
-        with self._lifecycle_watcher_lock:
-            if unless_run_started and self._run_seen:
-                return False
-            self._fail_run_done(error)
-            self._lifecycle_watcher_thread = None
-            return True
-
-    def _fail_run_done(self, error: BaseException) -> None:
-        run_done = self._run_done
-        if run_done is not None and not run_done.done():
-            run_done.set_result(_RunTerminal(status="errored", error=error))
-
     def _fetch_state(self) -> dict[str, Any]:
         """Fetch the current thread state from the REST endpoint."""
         return self._http.get(

libs/sdk-py/langgraph_sdk/auth/types.py

@@ -29,7 +29,9 @@ Values:
     - interrupted: Run was manually interrupted
 """
 
-MultitaskStrategy = typing.Literal["reject", "rollback", "interrupt", "enqueue"]
+MultitaskStrategy = typing.Literal[
+    "reject", "rollback", "interrupt", "enqueue", "insert"
+]
 """Strategy for handling multiple concurrent tasks.
 
 Values:
@@ -37,6 +39,7 @@ Values:
     - rollback: Cancel current task and start new one
     - interrupt: Interrupt current task and start new one
     - enqueue: Queue new tasks to run after current one
+    - insert: Add input to current task at its next safe step; held while interrupted
 """
 
 OnConflictBehavior = typing.Literal["raise", "do_nothing"]

libs/sdk-py/langgraph_sdk/priority/__init__.py

@@ -1,155 +0,0 @@
-"""Custom run priority for LangGraph.
-
-.. warning::
-    This API is in beta and may change in future versions.
-
-This module lets developers decide the priority settings of each thread with
-an async function that the server calls at the first run on a thread with no
-settings. The function is registered on an object that `langgraph.json` names,
-and runs server-side.
-"""
-
-from __future__ import annotations
-
-import functools
-import inspect
-import typing
-import warnings
-from collections.abc import Awaitable, Callable
-
-from langgraph_sdk.encryption import DuplicateHandlerError, LangGraphBetaWarning
-from langgraph_sdk.priority import types
-
-_AssignHandler = Callable[
-    [types.PriorityContext], Awaitable[types.PrioritySettings | None]
-]
-_AssignHandlerT = typing.TypeVar("_AssignHandlerT", bound=_AssignHandler)
-
-
-@functools.lru_cache(maxsize=1)
-def _warn_priority_beta() -> None:
-    warnings.warn(
-        "The Priority API is in beta and may change in future versions.",
-        LangGraphBetaWarning,
-        stacklevel=4,
-    )
-
-
-def _validate_handler(fn: typing.Callable) -> None:
-    """Validate that the assign handler is async and takes one parameter.
-
-    Raises:
-        TypeError: If the handler is not an async function or has wrong parameter count
-    """
-    if not inspect.iscoroutinefunction(fn):
-        raise TypeError(
-            f"Priority assign handler must be an async function, got {type(fn)}"
-        )
-
-    sig = inspect.signature(fn)
-    params = [
-        p
-        for p in sig.parameters.values()
-        if p.kind in (p.POSITIONAL_ONLY, p.POSITIONAL_OR_KEYWORD)
-    ]
-    if len(params) != 1:
-        raise TypeError(
-            "Priority assign handler must accept exactly 1 parameter (ctx), "
-            f"got {len(params)}"
-        )
-
-
-class Priority:
-    """Decide the priority settings of your LangGraph application's threads.
-
-    .. warning::
-        This API is in beta and may change in future versions.
-
-    To use, create a separate Python file and add the path to the file to your
-    LangGraph API configuration file (`langgraph.json`). Within that file, create
-    an instance of the Priority class and register an assign function with
-    `@priority.assign`.
-
-    Example `langgraph.json` file:
-
-    ```json
-    {
-      "dependencies": ["."],
-      "graphs": {
-        "agent": "./my_agent/agent.py:graph"
-      },
-      "env": ".env",
-      "priority": {
-        "path": "./priority.py:priority"
-      }
-    }
-    ```
-
-    The server calls the assign function at the first run on a thread with no
-    settings, which can come long after the thread was created, and stores the
-    settings it returns on the thread. Later runs on the thread use the stored
-    settings. The function can be called more than once for one thread, for
-    example after it raises, and only one result is stored, so keep it free of
-    side effects.
-
-    ???+ example "Basic Usage"
-
-        ```python
-        from langgraph_sdk import Priority, PriorityContext, PrioritySettings
-
-        priority = Priority()
-
-        @priority.assign
-        async def assign(ctx: PriorityContext) -> PrioritySettings | None:
-            return {
-                "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"],
-            }
-        ```
-    """
-
-    __slots__ = ("_assign_handler",)
-
-    types = types
-    """Reference to priority type definitions.
-
-    Provides access to the type definitions used by the priority system:
-    PriorityContext and PrioritySettings.
-    """
-
-    def __init__(self) -> None:
-        """Initialize the Priority instance."""
-        _warn_priority_beta()
-        self._assign_handler: _AssignHandler | None = None
-
-    def assign(self, fn: _AssignHandlerT) -> _AssignHandlerT:
-        """Register the function that assigns a thread's priority settings.
-
-        The function receives a `PriorityContext` and returns `PrioritySettings`,
-        or `None` for the defaults.
-
-        Example:
-            ```python
-            @priority.assign
-            async def assign(ctx: PriorityContext) -> PrioritySettings | None:
-                if ctx.cron_id is not None:
-                    return {"priority": -2}
-                return None
-            ```
-
-        Args:
-            fn: The assign handler function
-
-        Returns:
-            The registered handler function
-
-        Raises:
-            DuplicateHandlerError: If an assign handler is already registered
-            TypeError: If the handler has an invalid signature
-        """
-        if self._assign_handler is not None:
-            raise DuplicateHandlerError("Priority assign handler already registered")
-        _validate_handler(fn)
-        self._assign_handler = fn
-        return fn

libs/sdk-py/langgraph_sdk/priority/types.py

@@ -1,67 +0,0 @@
-"""Priority types for LangGraph.
-
-This module defines the context the server passes to the function registered
-with `@priority.assign`, and the settings that function returns.
-"""
-
-from __future__ import annotations
-
-import typing
-from collections.abc import Sequence
-from dataclasses import dataclass
-
-from langgraph_sdk.auth.types import BaseUser
-
-
-@dataclass(frozen=True, slots=True)
-class PriorityContext:
-    """Context passed to the `@priority.assign` function at the first run on a thread with no settings."""
-
-    user: BaseUser
-    """The user from the deployment's auth, custom auth or LangSmith auth. Without auth, `user.identity` is empty."""
-
-    permissions: Sequence[str]
-    """The user's permissions from the same auth. Without auth, it's empty."""
-
-    thread_id: str | None
-    """The thread's ID, or `None` when the run creates its thread without being given an ID."""
-
-    thread_metadata: dict[str, typing.Any]
-    """The thread's metadata."""
-
-    assistant_id: str
-    """The ID of the assistant the run uses."""
-
-    graph_id: str
-    """The ID of the graph the assistant runs."""
-
-    assistant_metadata: dict[str, typing.Any]
-    """The assistant's metadata."""
-
-    run_metadata: dict[str, typing.Any]
-    """The run's metadata."""
-
-    cron_id: str | None
-    """The ID of the cron that started the run, or `None` when no cron started it."""
-
-
-class PrioritySettings(typing.TypedDict, total=False):
-    """Priority settings returned by the `@priority.assign` function.
-
-    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 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."""
-
-    fairness_group: str | None
-    """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."""

libs/sdk-py/langgraph_sdk/schema.py

@@ -78,13 +78,14 @@ Specifies behavior on disconnection:
 - "continue": Continue the operation even if disconnected.
 """
 
-MultitaskStrategy = Literal["reject", "interrupt", "rollback", "enqueue"]
+MultitaskStrategy = Literal["reject", "interrupt", "rollback", "enqueue", "insert"]
 """
 Defines how to handle multiple tasks:
 - "reject": Reject new tasks when busy.
 - "interrupt": Interrupt current task for new ones.
 - "rollback": Roll back current task and start new one.
 - "enqueue": Queue new tasks for later execution.
+- "insert": Add input to the current task at its next safe step; held while interrupted.
 """
 
 OnConflictBehavior = Literal["raise", "do_nothing"]

libs/sdk-py/langgraph_sdk/sse.py

@@ -79,27 +79,18 @@ class SSEDecoder:
     def __init__(self) -> None:
         self._event = ""
         self._data = bytearray()
-        self._last_event_id: str | None = None
+        self._last_event_id = ""
         self._retry: int | None = None
-        self._at_stream_start = True
 
     @property
     def last_event_id(self) -> str | None:
-        """Return the last event identifier that was seen.
+        """Return the last event identifier that was seen."""
 
-        `None` until the stream sends an `id` field, and `""` after an empty
-        one, which resets the reconnect cursor.
-        """
-
-        return self._last_event_id
+        return self._last_event_id or None
 
     def decode(self, line: bytes) -> StreamPart | None:
         # See: https://html.spec.whatwg.org/multipage/server-sent-events.html#event-stream-interpretation
 
-        if self._at_stream_start:
-            self._at_stream_start = False
-            line = line.removeprefix(b"\xef\xbb\xbf")
-
         if not line:
             if (
                 not self._event
@@ -112,7 +103,7 @@ class SSEDecoder:
             sse = StreamPart(
                 event=self._event,
                 data=orjson.loads(self._data) if self._data else None,  # ty: ignore[invalid-argument-type]
-                id=self._last_event_id or None,
+                id=self.last_event_id,
             )
 
             # NOTE: as per the SSE spec, do not reset last_event_id.
@@ -133,8 +124,6 @@ class SSEDecoder:
         if fieldname == b"event":
             self._event = value.decode()
         elif fieldname == b"data":
-            if self._data:
-                self._data.extend(b"\n")
             self._data.extend(value)
         elif fieldname == b"id":
             if b"\0" in value:

libs/sdk-py/langgraph_sdk/stream/errors.py

@@ -1,46 +0,0 @@
-"""Thread-stream failures, shared by the async and sync clients."""
-
-from __future__ import annotations
-
-from typing import Any
-
-import httpx
-from websockets.exceptions import ConnectionClosed, InvalidStatus
-
-
-def protocol_error(response: dict[str, Any]) -> RuntimeError:
-    """Build the error for a protocol `{"type": "error"}` envelope."""
-    code = response.get("error", "unknown")
-    message = response.get("message", "")
-    return RuntimeError(f"Protocol error [{code}]: {message}")
-
-
-def stream_error_frame(event: Any) -> RuntimeError | None:
-    """Return the error in an unsolicited `{"type": "error", "id": null}` frame.
-
-    The server sends one just before it closes a thread stream whose read failed.
-    """
-    if (
-        isinstance(event, dict)
-        and event.get("type") == "error"
-        and event.get("id") is None
-    ):
-        return protocol_error(event)
-    return None
-
-
-def is_non_retryable_stream_error(error: BaseException | None) -> bool:
-    """Whether reopening the stream would fail the same way.
-
-    True for a 4xx other than 408 and 429: the status of a refused stream request
-    or WebSocket upgrade, or a WebSocket close code of 4000 plus that status. A
-    server that rejects a WebSocket after accepting it closes with such a code,
-    because a browser can't read the status of a refused upgrade.
-    """
-    if isinstance(error, (httpx.HTTPStatusError, InvalidStatus)):
-        status = error.response.status_code
-    elif isinstance(error, ConnectionClosed) and error.rcvd is not None:
-        status = error.rcvd.code - 4000
-    else:
-        return False
-    return 400 <= status < 500 and status not in (408, 429)

libs/sdk-py/langgraph_sdk/stream/sync_controller.py

@@ -13,10 +13,6 @@ from typing import Any
 
 from langchain_protocol import Event, SubscribeParams
 
-from langgraph_sdk.stream.errors import (
-    is_non_retryable_stream_error,
-    stream_error_frame,
-)
 from langgraph_sdk.stream.subscription import compute_union_filter, filter_covers
 from langgraph_sdk.stream.transport import (
     SyncEventStreamHandle,
@@ -171,13 +167,6 @@ class SyncStreamController:
                 return
             try:
                 for event in self._dedup_iter(shared.events):
-                    if (frame_error := stream_error_frame(event)) is not None:
-                        _logger.warning(
-                            "Thread %s event stream failed: %s",
-                            self._transport.thread_id,
-                            frame_error,
-                        )
-                        continue
                     with self._lock:
                         if self._closed:
                             break
@@ -201,11 +190,7 @@ class SyncStreamController:
                     continue  # rotation happened; pick up new stream
                 # No rotation — check if this was a transport drop
             err = shared.error()
-            if (
-                err is not None
-                and not is_non_retryable_stream_error(err)
-                and not self._closed
-            ):
+            if err is not None and not self._closed:
                 if self._reconnect_shared_stream():
                     continue
             break
@@ -214,6 +199,25 @@ class SyncStreamController:
             for sub in self._subscriptions.values():
                 sub.queue.put(None)
 
+    def _reconnect_shared_stream(self) -> bool:
+        with self._lock:
+            base_filter = self._shared_stream_filter
+        if base_filter is None:
+            return False
+        for _ in range(self._max_reconnect_attempts):
+            with self._lock:
+                if self._closed:
+                    return False
+                params = self._filter_with_since(base_filter)
+            try:
+                new_stream = self._transport.open_event_stream(params)
+            except Exception:
+                continue
+            with self._lock:
+                self._shared_stream = new_stream
+            return True
+        return False
+
     def _compute_current_union(
         self, extra: SubscribeParams | None = None
     ) -> dict[str, Any]:
@@ -292,8 +296,7 @@ class SyncStreamController:
         """Attempt to reopen the shared stream after a transport drop.
 
         Returns True if a new stream was successfully opened, False if all
-        reconnect attempts were exhausted, the server rejected the stream with a
-        non-retryable 4xx, or the controller was closed.
+        reconnect attempts were exhausted or the controller was closed.
         """
         base_filter = self._shared_stream_filter
         if base_filter is None:
@@ -314,8 +317,6 @@ class SyncStreamController:
                         old.close()
                 return True
             except Exception as err:
-                if is_non_retryable_stream_error(err):
-                    return False
                 _logger.debug("sync reconnect attempt %d failed: %r", attempt, err)
         return False
 

libs/sdk-py/pyproject.toml

@@ -16,7 +16,7 @@ dependencies = [
     "orjson>=3.11.5",
     "langchain-protocol>=0.0.15",
     "langchain-core>=1.4.0,<2",
-    "websockets>=14",
+    "websockets>=14,<17",
 ]
 
 [tool.hatch.version]

libs/sdk-py/tests/streaming/_events.py

@@ -69,16 +69,6 @@ def lifecycle_errored_event(
     return _base(seq, "lifecycle", namespace or [], {"event": "failed", "error": error})
 
 
-def thread_stream_failed_frame() -> dict[str, Any]:
-    """Unsolicited error frame the server sends before closing a failed stream."""
-    return {
-        "type": "error",
-        "id": None,
-        "error": "unknown_error",
-        "message": "Thread event stream failed.",
-    }
-
-
 def values_event(
     seq: int = 0, namespace: list[str] | None = None, **data: Any
 ) -> dict[str, Any]:

libs/sdk-py/tests/streaming/_fake_server.py

@@ -60,7 +60,6 @@ class _StreamScript:
     events: list[dict[str, Any]]
     delay: float = 0.0
     fail_after: int | None = None
-    status: int = 200
 
 
 class FakeServer:
@@ -264,8 +263,6 @@ class FakeServer:
                     events=list(self.scripted_events), delay=self._stream_delay
                 )
             )
-            if script.status != 200:
-                return httpx.Response(script.status, json={"detail": "scripted"})
             self.open_event_streams += 1
             self._open_event_streams_max = max(
                 self._open_event_streams_max, self.open_event_streams

libs/sdk-py/tests/streaming/_sync_fake_server.py

@@ -14,7 +14,6 @@ import orjson
 class SyncStreamScript:
     events: list[dict[str, Any]]
     fail_after: int | None = None
-    status: int = 200
 
 
 class _SseByteStream(httpx.SyncByteStream):
@@ -114,8 +113,6 @@ class SyncFakeServer:
                 if self._stream_scripts
                 else SyncStreamScript(events=list(self.scripted_events))
             )
-            if script.status != 200:
-                return httpx.Response(script.status, json={"detail": "scripted"})
             return httpx.Response(
                 200,
                 headers={"content-type": "text/event-stream"},

libs/sdk-py/tests/streaming/test_lifecycle_namespace.py

@@ -1,67 +0,0 @@
-"""Child lifecycle completion must not finish the parent thread's output."""
-
-from __future__ import annotations
-
-import asyncio
-from typing import cast
-
-import httpx
-import pytest
-from langchain_protocol import Event
-
-from langgraph_sdk._async.http import HttpClient
-from langgraph_sdk._async.threads import ThreadsClient
-from langgraph_sdk._sync.http import SyncHttpClient
-from langgraph_sdk._sync.stream import _BlockingResult
-from langgraph_sdk._sync.threads import SyncThreadsClient
-from streaming._events import input_requested_event, lifecycle_event
-
-
-@pytest.mark.parametrize("phase", ["completed", "failed"])
-async def test_async_child_terminal_does_not_finish_root(phase):
-    async with httpx.AsyncClient(base_url="http://test") as raw:
-        thread = ThreadsClient(HttpClient(raw)).stream(
-            thread_id="t-1", assistant_id="agent"
-        )
-        thread._run_done = asyncio.get_running_loop().create_future()
-        await thread._apply_lifecycle_event(
-            cast(Event, input_requested_event(namespace=["sub:1"]))
-        )
-        await thread._apply_lifecycle_event(
-            cast(Event, lifecycle_event(namespace=["sub:1"], event=phase))
-        )
-        assert not thread._run_done.done()
-        assert thread.interrupted
-        assert thread.interrupts[0]["namespace"] == ["sub:1"]
-
-        await thread._apply_lifecycle_event(
-            cast(Event, lifecycle_event(event="completed"))
-        )
-        assert thread._run_done.done()
-        assert (await thread._run_done).error is None
-        assert not thread.interrupted
-        assert thread.interrupts == []
-
-
-@pytest.mark.parametrize("phase", ["completed", "failed"])
-def test_sync_child_terminal_does_not_finish_root(phase):
-    with httpx.Client(base_url="http://test") as raw:
-        thread = SyncThreadsClient(SyncHttpClient(raw)).stream(
-            thread_id="t-1", assistant_id="agent"
-        )
-        thread._run_done = _BlockingResult()
-        thread._apply_lifecycle_event(
-            cast(Event, input_requested_event(namespace=["sub:1"]))
-        )
-        thread._apply_lifecycle_event(
-            cast(Event, lifecycle_event(namespace=["sub:1"], event=phase))
-        )
-        assert not thread._run_done.done()
-        assert thread.interrupted
-        assert thread.interrupts[0]["namespace"] == ["sub:1"]
-
-        thread._apply_lifecycle_event(cast(Event, lifecycle_event(event="completed")))
-        assert thread._run_done.done()
-        assert thread._run_done.result().error is None
-        assert not thread.interrupted
-        assert thread.interrupts == []

libs/sdk-py/tests/streaming/test_lifecycle_watcher.py

@@ -17,7 +17,6 @@ from streaming._events import (
     lifecycle_completed_event,
     lifecycle_errored_event,
     lifecycle_event,
-    thread_stream_failed_frame,
 )
 from streaming._fake_server import FakeServer, _StreamScript
 
@@ -49,7 +48,7 @@ async def test_interrupts_populated_from_input_requested_event():
 
 
 async def test_aenter_starts_lifecycle_watcher():
-    """Entering with an explicit thread_id opens the lifecycle/input SSE before run.start."""
+    """Entering AsyncThreadStream opens lifecycle/input SSE before run.start."""
     fake = FakeServer()
     fake.script([lifecycle_event(seq=0, phase="started")])
     asgi = httpx.ASGITransport(app=fake.app)
@@ -275,137 +274,3 @@ async def test_lifecycle_watcher_reconnects_with_since_after_transport_drop():
     assert fake.stream_request_bodies[0]["channels"] == ["lifecycle", "input"]
     assert fake.stream_request_bodies[1]["channels"] == ["lifecycle", "input"]
     assert fake.stream_request_bodies[1]["since"] == 1
-
-
-async def test_lifecycle_error_frame_becomes_the_run_error():
-    fake = FakeServer()
-    fake.script([lifecycle_event(seq=0, phase="running"), thread_stream_failed_frame()])
-    async with httpx.AsyncClient(
-        transport=fake.transport, base_url="http://test"
-    ) as raw:
-        threads = ThreadsClient(HttpClient(raw))
-        async with threads.stream(thread_id="t-1", assistant_id="agent") as thread:
-            run_done = thread._run_done
-            assert run_done is not None
-            terminal = await asyncio.wait_for(run_done, timeout=2.0)
-
-    assert terminal.status == "errored"
-    assert (
-        str(terminal.error)
-        == "Protocol error [unknown_error]: Thread event stream failed."
-    )
-
-
-async def test_lifecycle_watcher_stops_on_a_404_without_retrying():
-    fake = FakeServer()
-    fake.script_sequence([_StreamScript(events=[], status=404)])
-    async with httpx.AsyncClient(
-        transport=fake.transport, base_url="http://test"
-    ) as raw:
-        threads = ThreadsClient(HttpClient(raw))
-        async with threads.stream(thread_id="t-1", assistant_id="agent") as thread:
-            run_done = thread._run_done
-            assert run_done is not None
-            terminal = await asyncio.wait_for(run_done, timeout=2.0)
-
-    assert isinstance(terminal.error, httpx.HTTPStatusError)
-    assert terminal.error.response.status_code == 404
-    assert len(fake.stream_request_bodies) == 1
-
-
-async def test_minted_thread_opens_the_lifecycle_stream_after_run_start():
-    fake = FakeServer()
-    fake.script([lifecycle_completed_event(seq=1)])
-    async with httpx.AsyncClient(
-        transport=fake.transport, base_url="http://test"
-    ) as raw:
-        threads = ThreadsClient(HttpClient(raw))
-        async with threads.stream(assistant_id="agent") as thread:
-            assert thread._lifecycle_watcher_task is None
-            await thread.run.start(input={})
-            run_done = thread._run_done
-            assert run_done is not None
-            terminal = await asyncio.wait_for(run_done, timeout=2.0)
-
-    assert terminal.status == "completed"
-
-
-def _new_thread_scripts() -> list[_StreamScript]:
-    return [
-        _StreamScript(events=[], status=404),
-        _StreamScript(events=[lifecycle_completed_event(seq=1)]),
-    ]
-
-
-async def test_run_start_restarts_a_watcher_stopped_by_a_404_for_a_new_thread():
-    fake = FakeServer()
-    fake.script_sequence(_new_thread_scripts())
-    fake.set_state({"ok": True})
-    async with httpx.AsyncClient(
-        transport=fake.transport, base_url="http://test"
-    ) as raw:
-        threads = ThreadsClient(HttpClient(raw))
-        async with threads.stream(thread_id="t-new", assistant_id="agent") as thread:
-            rejected = thread._run_done
-            assert rejected is not None
-            await asyncio.wait_for(rejected, timeout=2.0)
-            await thread.run.start(input={})
-            output = await thread.output.with_timeout(2.0)
-
-    assert output == {"ok": True}
-    assert len(fake.stream_request_bodies) == 2
-
-
-async def test_lifecycle_watcher_retries_a_404_that_arrives_after_run_start():
-    fake = FakeServer()
-    fake.script_sequence(_new_thread_scripts())
-    fake.set_state({"ok": True})
-    stream_opened = asyncio.Event()
-    run_started = asyncio.Event()
-
-    async def handle(request: httpx.Request) -> httpx.Response:
-        if (
-            request.url.path.endswith("/stream/events")
-            and not fake.stream_request_bodies
-        ):
-            stream_opened.set()
-            await run_started.wait()
-        return await fake._handle_request(request)
-
-    async with httpx.AsyncClient(
-        transport=httpx.MockTransport(handle), base_url="http://test"
-    ) as raw:
-        threads = ThreadsClient(HttpClient(raw))
-        async with threads.stream(thread_id="t-new", assistant_id="agent") as thread:
-            await asyncio.wait_for(stream_opened.wait(), timeout=2.0)
-            await thread.run.start(input={})
-            run_started.set()
-            output = await thread.output.with_timeout(2.0)
-
-    assert output == {"ok": True}
-    assert len(fake.stream_request_bodies) == 2
-
-
-async def test_lifecycle_watcher_reports_the_error_frame_when_reconnects_run_out():
-    fake = FakeServer()
-    async with httpx.AsyncClient(
-        transport=fake.transport, base_url="http://test"
-    ) as raw:
-        threads = ThreadsClient(HttpClient(raw))
-        stream = threads.stream(thread_id="t-1", assistant_id="agent")
-        stream._lifecycle_max_reconnect_attempts = 1
-        fake.script_sequence(
-            [
-                _StreamScript(events=[thread_stream_failed_frame()], fail_after=1)
-                for _ in range(stream._lifecycle_max_reconnect_attempts + 1)
-            ]
-        )
-        async with stream as thread:
-            run_done = thread._run_done
-            assert run_done is not None
-            terminal = await asyncio.wait_for(run_done, timeout=2.0)
-
-    assert (
-        str(terminal.error)
-        == "Protocol error [unknown_error]: Thread event stream failed."
-    )

libs/sdk-py/tests/streaming/test_shared_stream.py

@@ -1,13 +1,11 @@
 from __future__ import annotations
 
 import asyncio
-from collections.abc import AsyncGenerator, AsyncIterator
+from collections.abc import AsyncGenerator
 from typing import Any, cast
 from unittest.mock import MagicMock
 
 import httpx
-from websockets.exceptions import ConnectionClosedError
-from websockets.frames import Close
 
 from langgraph_sdk._async.http import HttpClient
 from langgraph_sdk._async.threads import ThreadsClient
@@ -350,66 +348,3 @@ async def test_send_command_applied_through_seq_seeds_shared_stream_since():
     ]
     assert len(values_requests) == 1
     assert values_requests[0]["since"] == 17
-
-
-async def _drain(events: AsyncIterator[Any]) -> list[Any]:
-    return [event async for event in events]
-
-
-async def test_shared_stream_stops_reconnecting_on_a_404():
-    fake = FakeServer()
-    fake.script_sequence(
-        [
-            _StreamScript(events=[values_event(seq=1)], fail_after=1),
-            _StreamScript(events=[], status=404),
-        ]
-    )
-    async with httpx.AsyncClient(
-        transport=fake.transport, base_url="http://test"
-    ) as raw:
-        threads = ThreadsClient(HttpClient(raw))
-        async with threads.stream(assistant_id="agent") as thread:
-            received = await asyncio.wait_for(
-                _drain(thread.subscribe(["values"])), timeout=5.0
-            )
-
-    assert [event["seq"] for event in received] == [1]
-    assert len(fake.stream_request_bodies) == 2
-
-
-async def test_shared_stream_does_not_reconnect_after_a_4404_close(
-    monkeypatch: Any,
-) -> None:
-    opened: list[dict[str, Any]] = []
-
-    def open_then_close_with_4404(
-        _self: ProtocolSseTransport, params: dict[str, Any]
-    ) -> EventStreamHandle:
-        opened.append(params)
-        loop = asyncio.get_running_loop()
-        ready: asyncio.Future[None] = loop.create_future()
-        ready.set_result(None)
-        done: asyncio.Future[BaseException | None] = loop.create_future()
-        done.set_result(ConnectionClosedError(Close(4404, "not found"), None))
-
-        async def events() -> AsyncGenerator[Any, None]:
-            await asyncio.sleep(0)
-            yield values_event(seq=1)
-
-        async def close() -> None:
-            return None
-
-        return EventStreamHandle(events=events(), ready=ready, done=done, close=close)
-
-    monkeypatch.setattr(
-        ProtocolSseTransport, "open_event_stream", open_then_close_with_4404
-    )
-    async with httpx.AsyncClient(base_url="http://test") as raw:
-        threads = ThreadsClient(HttpClient(raw))
-        async with threads.stream(assistant_id="agent") as thread:
-            received = await asyncio.wait_for(
-                _drain(thread.subscribe(["values"])), timeout=5.0
-            )
-
-    assert [event["seq"] for event in received] == [1]
-    assert len(opened) == 1

libs/sdk-py/tests/streaming/test_stream_errors.py

@@ -1,67 +0,0 @@
-from __future__ import annotations
-
-import httpx
-import pytest
-from websockets.datastructures import Headers
-from websockets.exceptions import ConnectionClosedError, InvalidStatus
-from websockets.frames import Close
-from websockets.http11 import Response
-
-from langgraph_sdk.stream.errors import (
-    is_non_retryable_stream_error,
-    stream_error_frame,
-)
-
-
-def _http_error(status: int) -> httpx.HTTPStatusError:
-    request = httpx.Request("POST", "http://test/threads/t-1/stream/events")
-    response = httpx.Response(status, request=request)
-    return httpx.HTTPStatusError("scripted", request=request, response=response)
-
-
-def _ws_close(code: int) -> ConnectionClosedError:
-    return ConnectionClosedError(Close(code, "scripted"), None)
-
-
-@pytest.mark.parametrize(
-    ("error", "expected"),
-    [
-        pytest.param(_http_error(403), True, id="http-403"),
-        pytest.param(_http_error(404), True, id="http-404"),
-        pytest.param(_http_error(408), False, id="http-408"),
-        pytest.param(_http_error(429), False, id="http-429"),
-        pytest.param(_http_error(503), False, id="http-503"),
-        pytest.param(_ws_close(4404), True, id="ws-close-4404"),
-        pytest.param(_ws_close(4422), True, id="ws-close-4422"),
-        pytest.param(_ws_close(4429), False, id="ws-close-4429"),
-        pytest.param(_ws_close(4503), False, id="ws-close-4503"),
-        pytest.param(_ws_close(1011), False, id="ws-close-1011"),
-        pytest.param(
-            InvalidStatus(Response(403, "Forbidden", Headers())),
-            True,
-            id="ws-upgrade-403",
-        ),
-        pytest.param(RuntimeError("network down"), False, id="no-status"),
-        pytest.param(None, False, id="none"),
-    ],
-)
-def test_is_non_retryable_stream_error(
-    error: BaseException | None, expected: bool
-) -> None:
-    assert is_non_retryable_stream_error(error) is expected
-
-
-def test_stream_error_frame_reads_only_unsolicited_error_frames() -> None:
-    frame = {
-        "type": "error",
-        "id": None,
-        "error": "unknown_error",
-        "message": "Thread event stream failed.",
-    }
-
-    assert (
-        str(stream_error_frame(frame))
-        == "Protocol error [unknown_error]: Thread event stream failed."
-    )
-    assert stream_error_frame({**frame, "id": 3}) is None
-    assert stream_error_frame({"type": "event", "method": "values"}) is None

libs/sdk-py/tests/streaming/test_sync_thread_stream.py

@@ -35,7 +35,6 @@ from streaming._events import (
     message_text_delta_event,
     message_text_finish_event,
     tasks_start_event,
-    thread_stream_failed_frame,
     tool_finished_event,
     tool_started_event,
     updates_event,
@@ -869,196 +868,3 @@ def test_interleave_projections_data_channel_scoped_to_root_namespace():
             ]
     assert {"scope": "root"} in checkpoints
     assert {"scope": "child"} not in checkpoints
-
-
-def test_sync_lifecycle_clean_eof_fails_the_run_instead_of_blocking():
-    fake = SyncFakeServer()
-    fake.script([lifecycle_started_event(seq=0)])
-    with httpx.Client(transport=fake.transport, base_url="http://test") as raw:
-        threads = SyncThreadsClient(SyncHttpClient(raw))
-        with threads.stream(thread_id="t-1", assistant_id="agent") as thread:
-            run_done = thread._run_done
-            assert run_done is not None
-            terminal = run_done.result(timeout=2.0)
-
-    assert terminal.status == "errored"
-    assert "ended before terminal" in str(terminal.error)
-
-
-def test_sync_lifecycle_error_frame_becomes_the_run_error():
-    fake = SyncFakeServer()
-    fake.script([lifecycle_event(seq=0, phase="running"), thread_stream_failed_frame()])
-    with httpx.Client(transport=fake.transport, base_url="http://test") as raw:
-        threads = SyncThreadsClient(SyncHttpClient(raw))
-        with threads.stream(thread_id="t-1", assistant_id="agent") as thread:
-            run_done = thread._run_done
-            assert run_done is not None
-            terminal = run_done.result(timeout=2.0)
-
-    assert terminal.status == "errored"
-    assert (
-        str(terminal.error)
-        == "Protocol error [unknown_error]: Thread event stream failed."
-    )
-
-
-def test_sync_lifecycle_watcher_stops_on_a_404_without_retrying():
-    fake = SyncFakeServer()
-    fake.script_sequence([SyncStreamScript(events=[], status=404)])
-    with httpx.Client(transport=fake.transport, base_url="http://test") as raw:
-        threads = SyncThreadsClient(SyncHttpClient(raw))
-        with threads.stream(thread_id="t-1", assistant_id="agent") as thread:
-            run_done = thread._run_done
-            assert run_done is not None
-            terminal = run_done.result(timeout=2.0)
-
-    assert isinstance(terminal.error, httpx.HTTPStatusError)
-    assert terminal.error.response.status_code == 404
-    assert len(fake.stream_request_bodies) == 1
-
-
-def test_sync_minted_thread_opens_the_lifecycle_stream_after_run_start():
-    fake = SyncFakeServer()
-    fake.script([lifecycle_completed_event(seq=1)])
-    with httpx.Client(transport=fake.transport, base_url="http://test") as raw:
-        threads = SyncThreadsClient(SyncHttpClient(raw))
-        with threads.stream(assistant_id="agent") as thread:
-            assert thread._lifecycle_watcher_thread is None
-            thread.run.start(input={})
-            run_done = thread._run_done
-            assert run_done is not None
-            terminal = run_done.result(timeout=2.0)
-
-    assert terminal.status == "completed"
-
-
-def _sync_new_thread_scripts() -> list[SyncStreamScript]:
-    return [
-        SyncStreamScript(events=[], status=404),
-        SyncStreamScript(events=[lifecycle_completed_event(seq=1)]),
-    ]
-
-
-def test_sync_run_start_restarts_a_watcher_stopped_by_a_404_for_a_new_thread():
-    fake = SyncFakeServer()
-    fake.script_sequence(_sync_new_thread_scripts())
-    fake.set_state({"ok": True})
-    with httpx.Client(transport=fake.transport, base_url="http://test") as raw:
-        threads = SyncThreadsClient(SyncHttpClient(raw))
-        with threads.stream(thread_id="t-new", assistant_id="agent") as thread:
-            rejected = thread._run_done
-            assert rejected is not None
-            rejected.result(timeout=2.0)
-            thread.run.start(input={})
-            output = thread.output
-
-    assert output == {"ok": True}
-    assert len(fake.stream_request_bodies) == 2
-
-
-def test_sync_lifecycle_watcher_retries_a_404_that_arrives_after_run_start():
-    fake = SyncFakeServer()
-    fake.script_sequence(_sync_new_thread_scripts())
-    fake.set_state({"ok": True})
-    stream_opened = threading.Event()
-    run_started = threading.Event()
-
-    def handle(request: httpx.Request) -> httpx.Response:
-        if (
-            request.url.path.endswith("/stream/events")
-            and not fake.stream_request_bodies
-        ):
-            stream_opened.set()
-            run_started.wait(timeout=2.0)
-        return fake._handle(request)
-
-    with httpx.Client(
-        transport=httpx.MockTransport(handle), base_url="http://test"
-    ) as raw:
-        threads = SyncThreadsClient(SyncHttpClient(raw))
-        with threads.stream(thread_id="t-new", assistant_id="agent") as thread:
-            assert stream_opened.wait(timeout=2.0)
-            thread.run.start(input={})
-            run_started.set()
-            output = thread.output
-
-    assert output == {"ok": True}
-    assert len(fake.stream_request_bodies) == 2
-
-
-def test_sync_lifecycle_watcher_reports_the_error_frame_when_reconnects_run_out():
-    fake = SyncFakeServer()
-    with httpx.Client(transport=fake.transport, base_url="http://test") as raw:
-        threads = SyncThreadsClient(SyncHttpClient(raw))
-        stream = threads.stream(thread_id="t-1", assistant_id="agent")
-        stream._lifecycle_max_reconnect_attempts = 1
-        fake.script_sequence(
-            [
-                SyncStreamScript(events=[thread_stream_failed_frame()], fail_after=1)
-                for _ in range(stream._lifecycle_max_reconnect_attempts + 1)
-            ]
-        )
-        with stream as thread:
-            run_done = thread._run_done
-            assert run_done is not None
-            terminal = run_done.result(timeout=2.0)
-
-    assert (
-        str(terminal.error)
-        == "Protocol error [unknown_error]: Thread event stream failed."
-    )
-
-
-def test_sync_concurrent_run_starts_start_one_lifecycle_watcher(monkeypatch):
-    real_thread = threading.Thread
-    created_watchers: list[str] = []
-
-    class _SlowToCreateThread(real_thread):
-        def __init__(self, *args: Any, **kwargs: Any) -> None:
-            if kwargs.get("name") == "langgraph-sdk-sync-lifecycle":
-                created_watchers.append(kwargs["name"])
-                time.sleep(0.05)
-            super().__init__(*args, **kwargs)
-
-    monkeypatch.setattr(threading, "Thread", _SlowToCreateThread)
-    fake = SyncFakeServer()
-    fake.script([lifecycle_completed_event(seq=1)])
-    with httpx.Client(transport=fake.transport, base_url="http://test") as raw:
-        threads = SyncThreadsClient(SyncHttpClient(raw))
-        with threads.stream(assistant_id="agent") as thread:
-            barrier = threading.Barrier(2)
-
-            def start_run() -> None:
-                barrier.wait()
-                thread.run.start(input={})
-
-            runners = [real_thread(target=start_run) for _ in range(2)]
-            for runner in runners:
-                runner.start()
-            for runner in runners:
-                runner.join()
-
-    assert len(created_watchers) == 1
-
-
-def test_sync_reconnect_stops_on_a_404(monkeypatch):
-    monkeypatch.setattr(_ctrl_mod.time, "sleep", lambda _delay: None)
-    opened: list[dict[str, Any]] = []
-
-    class _NotFoundTransport(SyncProtocolSseTransport):
-        def open_event_stream(self, params: dict) -> SyncEventStreamHandle:
-            opened.append(params)
-            request = httpx.Request("POST", "http://test/threads/t-1/stream/events")
-            raise httpx.HTTPStatusError(
-                "not found",
-                request=request,
-                response=httpx.Response(404, request=request),
-            )
-
-    with httpx.Client(base_url="http://test") as raw:
-        transport = _NotFoundTransport(client=raw, thread_id="t-1")
-        controller = SyncStreamController(transport, max_reconnect_attempts=5)
-        controller._shared_stream_filter = {"channels": ["values"]}
-        assert controller._reconnect_shared_stream() is False
-
-    assert len(opened) == 1

libs/sdk-py/tests/test_api_parity.py

@@ -1,9 +1,7 @@
 from __future__ import annotations
 
-import ast
 import inspect
 import re
-from pathlib import Path
 
 import pytest
 
@@ -130,45 +128,3 @@ def test_sync_api_matches_async(async_cls, sync_cls):
             f"Return annotation mismatch for {async_cls.__name__}.{name}: "
             f"async={a_ret}, sync={s_ret}"
         )
-
-
-# Stateless overloads (`thread_id: None`) leave out the thread-only parameters,
-# and stateful ones (`thread_id: str`) leave out `on_completion`, which only
-# applies to stateless runs.
-_RUN_OVERLOAD_OMISSIONS = {
-    "None": {"checkpoint", "checkpoint_id", "multitask_strategy"},
-    "str": {"on_completion"},
-}
-
-
-@pytest.mark.parametrize("client_cls", [RunsClient, SyncRunsClient])
-def test_run_overloads_accept_implementation_params(client_cls) -> None:
-    tree = ast.parse(Path(inspect.getfile(client_cls)).read_text())
-    cls = next(
-        node
-        for node in tree.body
-        if isinstance(node, ast.ClassDef) and node.name == client_cls.__name__
-    )
-    defs = [
-        node
-        for node in cls.body
-        if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef))
-        and node.name in {"stream", "create", "wait"}
-    ]
-    impl_params = {
-        node.name: {arg.arg for arg in node.args.kwonlyargs}
-        for node in defs
-        if not node.decorator_list
-    }
-    gaps = []
-    for stub in defs:
-        if not stub.decorator_list:
-            continue
-        thread_id = next(arg for arg in stub.args.args if arg.arg == "thread_id")
-        assert thread_id.annotation is not None
-        kind = ast.unparse(thread_id.annotation)
-        expected = impl_params[stub.name] - _RUN_OVERLOAD_OMISSIONS[kind]
-        if missing := expected - {arg.arg for arg in stub.args.kwonlyargs}:
-            gaps.append(f"{stub.name}(thread_id: {kind}) line {stub.lineno}: {missing}")
-
-    assert not gaps, gaps

libs/sdk-py/tests/test_client_stream.py

@@ -5,7 +5,6 @@ from pathlib import Path
 from typing import Any
 
 import httpx
-import orjson
 import pytest
 from typing_extensions import assert_type
 
@@ -111,25 +110,6 @@ def test_stream_sse():
         assert len(parts) == 79
 
 
-def test_sse_decoder_joins_data_lines_with_a_newline():
-    decoder = SSEDecoder()
-    for line in (b"data: [1,", b"data: 2]"):
-        decoder.decode(line)
-    assert decoder.decode(b"") == StreamPart(event="", data=[1, 2], id=None)  # ty: ignore[invalid-argument-type]
-
-    for line in (b"data: [1", b"data: 0]"):
-        decoder.decode(line)
-    with pytest.raises(orjson.JSONDecodeError):
-        decoder.decode(b"")
-
-
-def test_sse_decoder_strips_a_leading_bom():
-    decoder = SSEDecoder()
-    for line in (b"\xef\xbb\xbfevent: values", b"data: 1"):
-        decoder.decode(line)
-    assert decoder.decode(b"") == StreamPart(event="values", data=1, id=None)  # ty: ignore[invalid-argument-type]
-
-
 # --- HTTP client streaming ---
 
 
@@ -312,52 +292,6 @@ async def test_http_client_stream_recovers_after_disconnect():
     ]
 
 
-def _drop_after_an_empty_id(stream_cls: type, reconnects: list[httpx.Request]):
-    def handler(request: httpx.Request) -> httpx.Response:
-        if request.method == "POST":
-            return httpx.Response(
-                200,
-                headers={"Content-Type": "text/event-stream", "Location": "/reconnect"},
-                stream=stream_cls(
-                    [
-                        b"id: 1\nevent: values\ndata: 1\n\n",
-                        b"id:\nevent: values\ndata: 2\n\n",
-                    ],
-                    httpx.RemoteProtocolError("incomplete chunked read"),
-                ),
-            )
-        reconnects.append(request)
-        return httpx.Response(
-            200,
-            headers={"Content-Type": "text/event-stream"},
-            stream=stream_cls([b"event: end\ndata: null\n\n"]),
-        )
-
-    return handler
-
-
-def test_sync_stream_reconnects_without_a_cursor_after_an_empty_id():
-    reconnects: list[httpx.Request] = []
-    transport = httpx.MockTransport(_drop_after_an_empty_id(ListByteStream, reconnects))
-    with httpx.Client(transport=transport, base_url="https://example.com") as client:
-        list(SyncHttpClient(client).stream("/stream", "POST", json={}))
-
-    assert "last-event-id" not in reconnects[0].headers
-
-
-async def test_async_stream_reconnects_without_a_cursor_after_an_empty_id():
-    reconnects: list[httpx.Request] = []
-    transport = httpx.MockTransport(
-        _drop_after_an_empty_id(AsyncListByteStream, reconnects)
-    )
-    async with httpx.AsyncClient(
-        transport=transport, base_url="https://example.com"
-    ) as client:
-        [part async for part in HttpClient(client).stream("/stream", "POST", json={})]
-
-    assert "last-event-id" not in reconnects[0].headers
-
-
 # --- _sse_to_v2_dict conversion ---
 
 

libs/sdk-py/tests/test_priority.py

@@ -1,128 +0,0 @@
-import dataclasses
-
-import pytest
-
-import langgraph_sdk
-from langgraph_sdk import Priority, PriorityContext, PrioritySettings
-from langgraph_sdk.encryption import DuplicateHandlerError, LangGraphBetaWarning
-from langgraph_sdk.priority import _warn_priority_beta
-
-
-class _User:
-    is_authenticated = True
-    display_name = "user-1"
-    identity = "user-1"
-    permissions: tuple[str, ...] = ()
-
-    def __getitem__(self, key):
-        return getattr(self, key)
-
-    def __contains__(self, key):
-        return hasattr(self, key)
-
-    def __iter__(self):
-        return iter(("identity", "display_name", "is_authenticated", "permissions"))
-
-
-def _context(thread_id: str | None) -> PriorityContext:
-    return PriorityContext(
-        user=_User(),
-        permissions=[],
-        thread_id=thread_id,
-        thread_metadata={},
-        assistant_id="assistant-1",
-        graph_id="agent",
-        assistant_metadata={"tier": "gold"},
-        run_metadata={},
-        cron_id=None,
-    )
-
-
-async def _no_params() -> PrioritySettings | None:
-    return None
-
-
-async def _two_params(_ctx: PriorityContext, _extra: object) -> PrioritySettings | None:
-    return None
-
-
-def test_priority_and_its_types_are_exported():
-    assert {"Priority", "PriorityContext", "PrioritySettings"} <= set(
-        langgraph_sdk.__all__
-    )
-    assert Priority.types.PriorityContext is PriorityContext
-    assert Priority.types.PrioritySettings is PrioritySettings
-
-
-def test_construction_warns_that_priority_is_beta():
-    # The warning fires once per process, so an earlier test may have used it up.
-    _warn_priority_beta.cache_clear()
-    with pytest.warns(LangGraphBetaWarning, match="Priority API is in beta"):
-        Priority()
-
-
-def test_assign_registers_and_returns_the_function():
-    priority = Priority()
-
-    async def assign(_ctx: PriorityContext) -> PrioritySettings | None:
-        return {"priority": 3, "fairness_group": "org-42"}
-
-    assert priority.assign(assign) is assign
-    assert priority._assign_handler is assign
-
-
-def test_assign_rejects_a_sync_function():
-    priority = Priority()
-
-    def assign(_ctx: PriorityContext) -> PrioritySettings | None:
-        return None
-
-    with pytest.raises(TypeError, match="must be an async function"):
-        priority.assign(assign)  # ty: ignore[invalid-argument-type]
-    assert priority._assign_handler is None
-
-
-@pytest.mark.parametrize("fn", [_no_params, _two_params])
-def test_assign_rejects_the_wrong_number_of_parameters(fn):
-    priority = Priority()
-
-    with pytest.raises(TypeError, match="must accept exactly 1 parameter"):
-        priority.assign(fn)
-    assert priority._assign_handler is None
-
-
-def test_assign_rejects_a_second_function():
-    priority = Priority()
-
-    @priority.assign
-    async def first(_ctx: PriorityContext) -> PrioritySettings | None:
-        return None
-
-    with pytest.raises(DuplicateHandlerError):
-
-        @priority.assign
-        async def second(_ctx: PriorityContext) -> PrioritySettings | None:
-            return None
-
-    assert priority._assign_handler is first
-
-
-def test_context_accepts_no_thread_id():
-    # `make lint` type-checks this call too, so `thread_id` must accept None there.
-    assert _context(thread_id=None).thread_id is None
-
-
-def test_context_is_frozen():
-    ctx = _context(thread_id="thread-1")
-
-    with pytest.raises(dataclasses.FrozenInstanceError):
-        ctx.thread_id = "thread-2"  # ty: ignore[invalid-assignment]
-
-
-def test_every_settings_key_is_optional():
-    assert PrioritySettings.__optional_keys__ == {
-        "priority",
-        "fairness_group",
-        "fairness_weight",
-    }
-    assert PrioritySettings.__required_keys__ == frozenset()

libs/sdk-py/tests/test_runs_client.py

@@ -1,119 +0,0 @@
-from __future__ import annotations
-
-import json
-from collections.abc import AsyncIterator, Iterator
-
-import httpx
-import pytest
-
-from langgraph_sdk.client import (
-    HttpClient,
-    RunsClient,
-    SyncHttpClient,
-    SyncRunsClient,
-)
-
-
-class _BodyDropsMidRead(httpx.SyncByteStream, httpx.AsyncByteStream):
-    def __iter__(self) -> Iterator[bytes]:
-        yield b'{"partial'
-        raise httpx.ReadError("connection dropped")
-
-    async def __aiter__(self) -> AsyncIterator[bytes]:
-        yield b'{"partial'
-        raise httpx.ReadError("connection dropped")
-
-
-def _wait_handler(requests: list[httpx.Request]):
-    def handler(request: httpx.Request) -> httpx.Response:
-        requests.append(request)
-        if request.method == "POST":
-            return httpx.Response(
-                200,
-                headers={"Location": "/threads/t1/runs/r1/join"},
-                stream=_BodyDropsMidRead(),
-            )
-        return httpx.Response(200, json={"done": True})
-
-    return handler
-
-
-def _assert_bodyless_get(request: httpx.Request) -> None:
-    assert request.method == "GET"
-    assert request.url.path == "/threads/t1/runs/r1/join"
-    assert "content-length" not in request.headers, request.headers
-    assert "content-type" not in request.headers, request.headers
-    assert request.read() == b""
-
-
-def test_sync_wait_reconnects_with_a_bodyless_get():
-    requests: list[httpx.Request] = []
-    transport = httpx.MockTransport(_wait_handler(requests))
-    with httpx.Client(transport=transport, base_url="https://example.com") as client:
-        runs = SyncRunsClient(SyncHttpClient(client))
-        with pytest.warns(UserWarning, match="attempting reconnect"):
-            result = runs.wait("t1", "agent", input={"question": "hi"})
-
-    assert result == {"done": True}
-    _assert_bodyless_get(requests[1])
-
-
-async def test_async_wait_reconnects_with_a_bodyless_get():
-    requests: list[httpx.Request] = []
-    transport = httpx.MockTransport(_wait_handler(requests))
-    async with httpx.AsyncClient(
-        transport=transport, base_url="https://example.com"
-    ) as client:
-        runs = RunsClient(HttpClient(client))
-        with pytest.warns(UserWarning, match="attempting reconnect"):
-            result = await runs.wait("t1", "agent", input={"question": "hi"})
-
-    assert result == {"done": True}
-    _assert_bodyless_get(requests[1])
-
-
-def test_sync_wait_raises_the_run_error():
-    requests: list[httpx.Request] = []
-
-    def handler(request: httpx.Request) -> httpx.Response:
-        requests.append(request)
-        return httpx.Response(
-            200, json={"__error__": {"error": "RuntimeError", "message": "boom"}}
-        )
-
-    transport = httpx.MockTransport(handler)
-    with httpx.Client(transport=transport, base_url="https://example.com") as client:
-        runs = SyncRunsClient(SyncHttpClient(client))
-        with pytest.raises(Exception, match="RuntimeError: boom"):
-            runs.wait("t1", "agent", input={}, raise_error=True)
-
-    assert "raise_error" not in json.loads(requests[0].content)
-
-
-@pytest.mark.parametrize("asynchronous", [False, True])
-async def test_wait_returns_the_run_error_without_raise_error(asynchronous):
-    requests: list[httpx.Request] = []
-    run_error = {"__error__": {"error": "RuntimeError", "message": "boom"}}
-
-    def handler(request: httpx.Request) -> httpx.Response:
-        requests.append(request)
-        return httpx.Response(200, json=run_error)
-
-    transport = httpx.MockTransport(handler)
-    if asynchronous:
-        async with httpx.AsyncClient(
-            transport=transport, base_url="https://example.com"
-        ) as client:
-            result = await RunsClient(HttpClient(client)).wait(
-                "t1", "agent", input={}, raise_error=False
-            )
-    else:
-        with httpx.Client(
-            transport=transport, base_url="https://example.com"
-        ) as client:
-            result = SyncRunsClient(SyncHttpClient(client)).wait(
-                "t1", "agent", input={}, raise_error=False
-            )
-
-    assert result == run_error
-    assert "raise_error" not in json.loads(requests[0].content)

libs/sdk-py/uv.lock

@@ -40,11 +40,11 @@ wheels = [
 
 [[package]]
 name = "certifi"
-version = "2026.10.19"
+version = "2026.2.25"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/a6/bd/1436c50cc46699de0230fbaacc1d1de7bfec413176099949e9d5112e88f2/certifi-2026.10.19.tar.gz", hash = "sha256:035c1e85572b141bf1c3a3eff0e33a8eb74917522f2559075ff8d2fea780a1ae", size = 137598, upload-time = "2026-10-20T02:24:16.604Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/af/2d/7bf41579a8986e348fa033a31cdd0e4121114f6bce2457e8876010b092dd/certifi-2026.2.25.tar.gz", hash = "sha256:e887ab5cee78ea814d3472169153c2d12cd43b14bd03329a39a9c6e2e80bfba7", size = 155029, upload-time = "2026-02-25T02:54:17.342Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c4/51/29046e48f693c54e5b7412216d447a1d8362c9653148d98c02cdf65fa733/certifi-2026.10.19-py3-none-any.whl", hash = "sha256:42d35340cc5b9ba78e818ddbff0c5b1c2b779de448a340fd1b989f5fa8670e1b", size = 136464, upload-time = "2026-10-20T02:24:15.072Z" },
+    { url = "https://files.pythonhosted.org/packages/9a/3c/c17fb3ca2d9c3acff52e30b309f538586f9f5b9c9cf454f3845fc9af4881/certifi-2026.2.25-py3-none-any.whl", hash = "sha256:027692e4402ad994f1c42e52a4997a9763c646b73e4096e4d5d6db8af1d6f0fa", size = 153684, upload-time = "2026-02-25T02:54:15.766Z" },
 ]
 
 [[package]]
@@ -301,7 +301,7 @@ wheels = [
 
 [[package]]
 name = "langgraph"
-version = "1.2.18"
+version = "1.2.15"
 source = { editable = "../langgraph" }
 dependencies = [
     { name = "langchain-core" },
@@ -385,7 +385,7 @@ test = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.3.1"
+version = "4.3.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
@@ -433,7 +433,7 @@ test = [
 
 [[package]]
 name = "langgraph-prebuilt"
-version = "1.1.1"
+version = "1.1.0"
 source = { editable = "../prebuilt" }
 dependencies = [
     { name = "langchain-core" },
@@ -454,7 +454,7 @@ dev = [
     { name = "langgraph-checkpoint", editable = "../checkpoint" },
     { name = "langgraph-checkpoint-postgres", editable = "../checkpoint-postgres" },
     { name = "langgraph-checkpoint-sqlite", editable = "../checkpoint-sqlite" },
-    { name = "psycopg", extras = ["binary"] },
+    { name = "psycopg-binary" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -474,7 +474,7 @@ test = [
     { name = "langgraph-checkpoint", editable = "../checkpoint" },
     { name = "langgraph-checkpoint-postgres", editable = "../checkpoint-postgres" },
     { name = "langgraph-checkpoint-sqlite", editable = "../checkpoint-sqlite" },
-    { name = "psycopg", extras = ["binary"] },
+    { name = "psycopg-binary" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -525,7 +525,7 @@ requires-dist = [
     { name = "langchain-core", specifier = ">=1.4.0,<2" },
     { name = "langchain-protocol", specifier = ">=0.0.15" },
     { name = "orjson", specifier = ">=3.11.5" },
-    { name = "websockets", specifier = ">=14" },
+    { name = "websockets", specifier = ">=14,<17" },
 ]
 
 [package.metadata.requires-dev]