release(sdk-py): 0.4.5 (#8988 )

Bumps the Python SDK version from 0.4.4 to 0.4.5. Adds `response_schema` to the `Interrupt` TypedDict (#8886).
release(langgraph): 1.2.12 (#8987 )
2026-09-21 17:18:09 +02:00 · 2026-09-21 10:38:26 -04:00 · 2026-09-21 10:38:21 -04:00 · 2026-09-20 12:50:31 -07:00 · 2026-09-18 23:31:43 +00:00 · 2026-09-18 23:29:43 +00:00
20 changed files with 287 additions and 495 deletions
@@ -13,16 +13,16 @@ wheels = [

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@@ -19,16 +19,16 @@ wheels = [

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-]
-
-[[package]]
-name = "sniffio"
-version = "1.3.1"
-description = "Sniff out which async library your code is running under"
-optional = false
-python-versions = ">=3.7"
-groups = ["main"]
-files = [
-    {file = "sniffio-1.3.1-py3-none-any.whl", hash = "sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2"},
-    {file = "sniffio-1.3.1.tar.gz", hash = "sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc"},
-]
-
-[[package]]
-name = "typing-extensions"
-version = "4.12.2"
-description = "Backported and Experimental Type Hints for Python 3.8+"
-optional = false
-python-versions = ">=3.8"
-groups = ["main"]
-markers = "python_version < \"3.11\""
-files = [
-    {file = "typing_extensions-4.12.2-py3-none-any.whl", hash = "sha256:04e5ca0351e0f3f85c6853954072df659d0d13fac324d0072316b67d7794700d"},
-    {file = "typing_extensions-4.12.2.tar.gz", hash = "sha256:1a7ead55c7e559dd4dee8856e3a88b41225abfe1ce8df57b7c13915fe121ffb8"},
-]
-
-[metadata]
-lock-version = "2.1"
-python-versions = "^3.9.0,<4.0"
-content-hash = "ec5109729f30d2033a10a10e8f8d3ed94c7d96d5d31025b4815b0123664bb063"
@@ -12,5 +12,5 @@ def disable_analytics_env() -> None:
    if "LANGGRAPH_CLI_NO_ANALYTICS" in os.environ:
        print("⚠️ LANGGRAPH_CLI_NO_ANALYTICS is set. Overriding it for the test.")

-    with patch.dict(os.environ, {"LANGGRAPH_CLI_NO_ANALYTICS": "0"}):
+    with patch.dict(os.environ, {"LANGGRAPH_CLI_NO_ANALYTICS": "1"}):
        yield
@@ -39,15 +39,15 @@ wheels = [

 [[package]]
 name = "anyio"
-version = "4.13.0"
+version = "4.14.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "idna" },
    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/19/14/2c5dd9f512b66549ae92767a9c7b330ae88e1932ca57876909410251fe13/anyio-4.13.0.tar.gz", hash = "sha256:334b70e641fd2221c1505b3890c69882fe4a2df910cba14d97019b90b24439dc", size = 231622, upload-time = "2026-03-24T12:59:09.671Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/61/cc/a381afa6efea9f496eff839d4a6a1aed3bfafc7b3ab4b0d1b243a12573dd/anyio-4.14.2.tar.gz", hash = "sha256:cfa139f3ed1a23ee8f88a145ddb5ac7605b8bbfd8592baacd7ce3d8bb4313c7f", size = 260176, upload-time = "2026-07-12T20:29:07.082Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/da/42/e921fccf5015463e32a3cf6ee7f980a6ed0f395ceeaa45060b61d86486c2/anyio-4.13.0-py3-none-any.whl", hash = "sha256:08b310f9e24a9594186fd75b4f73f4a4152069e3853f1ed8bfbf58369f4ad708", size = 114353, upload-time = "2026-03-24T12:59:08.246Z" },
+    { url = "https://files.pythonhosted.org/packages/da/35/f2287558c17e29fafc8ef3daf819bb9834061cfa43bff8014f7df7f63bdc/anyio-4.14.2-py3-none-any.whl", hash = "sha256:9f505dda5ac9f0c8309b5e8bd445a8c2bf7246f3ce950121e45ea15bc41d1494", size = 125813, upload-time = "2026-07-12T20:29:05.763Z" },
 ]

 [[package]]
@@ -13,15 +13,15 @@ wheels = [

 [[package]]
 name = "anyio"
-version = "4.13.0"
+version = "4.14.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "idna" },
    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/19/14/2c5dd9f512b66549ae92767a9c7b330ae88e1932ca57876909410251fe13/anyio-4.13.0.tar.gz", hash = "sha256:334b70e641fd2221c1505b3890c69882fe4a2df910cba14d97019b90b24439dc", size = 231622, upload-time = "2026-03-24T12:59:09.671Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/61/cc/a381afa6efea9f496eff839d4a6a1aed3bfafc7b3ab4b0d1b243a12573dd/anyio-4.14.2.tar.gz", hash = "sha256:cfa139f3ed1a23ee8f88a145ddb5ac7605b8bbfd8592baacd7ce3d8bb4313c7f", size = 260176, upload-time = "2026-07-12T20:29:07.082Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/da/42/e921fccf5015463e32a3cf6ee7f980a6ed0f395ceeaa45060b61d86486c2/anyio-4.13.0-py3-none-any.whl", hash = "sha256:08b310f9e24a9594186fd75b4f73f4a4152069e3853f1ed8bfbf58369f4ad708", size = 114353, upload-time = "2026-03-24T12:59:08.246Z" },
+    { url = "https://files.pythonhosted.org/packages/da/35/f2287558c17e29fafc8ef3daf819bb9834061cfa43bff8014f7df7f63bdc/anyio-4.14.2-py3-none-any.whl", hash = "sha256:9f505dda5ac9f0c8309b5e8bd445a8c2bf7246f3ce950121e45ea15bc41d1494", size = 125813, upload-time = "2026-07-12T20:29:05.763Z" },
 ]

 [[package]]
@@ -19,16 +19,16 @@ wheels = [

 [[package]]
 name = "anyio"
-version = "4.13.0"
+version = "4.14.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "exceptiongroup", marker = "python_full_version < '3.11'" },
    { name = "idna" },
    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/19/14/2c5dd9f512b66549ae92767a9c7b330ae88e1932ca57876909410251fe13/anyio-4.13.0.tar.gz", hash = "sha256:334b70e641fd2221c1505b3890c69882fe4a2df910cba14d97019b90b24439dc", size = 231622, upload-time = "2026-03-24T12:59:09.671Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/61/cc/a381afa6efea9f496eff839d4a6a1aed3bfafc7b3ab4b0d1b243a12573dd/anyio-4.14.2.tar.gz", hash = "sha256:cfa139f3ed1a23ee8f88a145ddb5ac7605b8bbfd8592baacd7ce3d8bb4313c7f", size = 260176, upload-time = "2026-07-12T20:29:07.082Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/da/42/e921fccf5015463e32a3cf6ee7f980a6ed0f395ceeaa45060b61d86486c2/anyio-4.13.0-py3-none-any.whl", hash = "sha256:08b310f9e24a9594186fd75b4f73f4a4152069e3853f1ed8bfbf58369f4ad708", size = 114353, upload-time = "2026-03-24T12:59:08.246Z" },
+    { url = "https://files.pythonhosted.org/packages/da/35/f2287558c17e29fafc8ef3daf819bb9834061cfa43bff8014f7df7f63bdc/anyio-4.14.2-py3-none-any.whl", hash = "sha256:9f505dda5ac9f0c8309b5e8bd445a8c2bf7246f3ce950121e45ea15bc41d1494", size = 125813, upload-time = "2026-07-12T20:29:05.763Z" },
 ]

 [[package]]
@@ -12,15 +12,23 @@ from typing import (
    Generic,
    Literal,
    NamedTuple,
-    TypeVar,
    final,
+    overload,
 )
 from warnings import warn

 from langchain_core.messages import AnyMessage
 from langchain_core.runnables import Runnable, RunnableConfig
 from langgraph.checkpoint.base import BaseCheckpointSaver, CheckpointMetadata
-from typing_extensions import NotRequired, TypeAliasType, TypedDict, Unpack, deprecated
+from pydantic import TypeAdapter
+from typing_extensions import (
+    NotRequired,
+    TypeAliasType,
+    TypedDict,
+    TypeVar,
+    Unpack,
+    deprecated,
+)
 from xxhash import xxh3_128_hexdigest

 from langgraph._internal._cache import default_cache_key
@@ -36,6 +44,7 @@ from langgraph.warnings import LangGraphDeprecatedSinceV10, LangGraphDeprecatedS
 # when used in standalone type aliases.
 StateT = TypeVar("StateT")
 OutputT = TypeVar("OutputT")
+ResponseT = TypeVar("ResponseT", default=Any)

 if TYPE_CHECKING:
    from langgraph.pregel.protocol import PregelProtocol
@@ -572,7 +581,7 @@ _DEFAULT_INTERRUPT_ID = "placeholder-id"

@final
@dataclass(init=False, slots=True)
-class Interrupt:
+class Interrupt(Generic[ResponseT]):
    """Information about an interrupt that occurred in a node.

    !!! version-added "Added in version 0.2.24"
@@ -596,13 +605,22 @@ class Interrupt:
    id: str
    """The ID of the interrupt. Can be used to resume the interrupt directly."""

+    response_schema: type[ResponseT] | dict[str, Any] | None = None
+    """Schema for the value expected when resuming this interrupt, if the graph provided one.
+
+    A surfaced interrupt carries JSON Schema (a `dict`); `type[ResponseT]` records the
+    Python type at construction so `Interrupt[Decision]` is meaningful to type checkers."""
+
    def __init__(
        self,
        value: Any,
        id: str = _DEFAULT_INTERRUPT_ID,
+        *,
+        response_schema: type[ResponseT] | dict[str, Any] | None = None,
        **deprecated_kwargs: Unpack[DeprecatedKwargs],
    ) -> None:
        self.value = value
+        self.response_schema = response_schema

        if (
            (ns := deprecated_kwargs.get("ns", MISSING)) is not MISSING
@@ -614,8 +632,18 @@ class Interrupt:
            self.id = id

    @classmethod
-    def from_ns(cls, value: Any, ns: str) -> Interrupt:
-        return cls(value=value, id=xxh3_128_hexdigest(ns.encode()))
+    def from_ns(
+        cls,
+        value: Any,
+        ns: str,
+        *,
+        response_schema: type[ResponseT] | dict[str, Any] | None = None,
+    ) -> Interrupt[ResponseT]:
+        return cls(
+            value=value,
+            id=xxh3_128_hexdigest(ns.encode()),
+            response_schema=response_schema,
+        )

    @property
    @deprecated("`interrupt_id` is deprecated. Use `id` instead.", category=None)
@@ -848,7 +876,17 @@ class Command(Generic[N], ToolOutputMixin):
    PARENT: ClassVar[Literal["__parent__"]] = "__parent__"


-def interrupt(value: Any) -> Any:
+@overload
+def interrupt(value: Any, *, response_schema: type[ResponseT]) -> ResponseT: ...
+
+
+@overload
+def interrupt(value: Any, *, response_schema: dict[str, Any] | None = None) -> Any: ...
+
+
+def interrupt(
+    value: Any, *, response_schema: dict[str, Any] | type | None = None
+) -> Any:
    """Interrupt the graph with a resumable exception from within a node.

    The `interrupt` function enables human-in-the-loop workflows by pausing graph
@@ -918,7 +956,7 @@ def interrupt(value: Any) -> Any:
        for chunk in graph.stream({\"foo\": \"abc\"}, config):
            print(chunk)

-        # > {'__interrupt__': (Interrupt(value='what is your age?', id='45fda8478b2ef754419799e10992af06'),)}
+        # > {'__interrupt__': (Interrupt(value='what is your age?', id='45fda8478b2ef754419799e10992af06', response_schema=None),)}

        command = Command(resume=\"some input from a human!!!\")

@@ -931,12 +969,20 @@ def interrupt(value: Any) -> Any:

    Args:
        value: The value to surface to the client when the graph is interrupted.
+        response_schema: Optional schema for the value expected on resume, surfaced
+            to clients so they can render a typed input form. Accepts a JSON Schema
+            `dict` (used as-is, resume values are not validated), or a Pydantic model
+            class, `TypedDict`, or dataclass, which are converted to JSON Schema for
+            clients and used to validate the resume value; the validated object is
+            what `interrupt` returns.

    Returns:
-        Any: On subsequent invocations within the same node (same task to be precise), returns the value provided during the first invocation
+        Any: On subsequent invocations within the same node (same task to be precise), returns the value provided during the first invocation,
+            validated against `response_schema` when one that supports validation was given.

    Raises:
        GraphInterrupt: On the first invocation within the node, halts execution and surfaces the provided value to the client.
+        pydantic.ValidationError: When a resume value does not match a Pydantic model, `TypedDict`, or dataclass `response_schema`.
    """
    from langgraph._internal._constants import (
        CONFIG_KEY_CHECKPOINT_NS,
@@ -948,27 +994,36 @@ def interrupt(value: Any) -> Any:
    from langgraph.errors import GraphInterrupt

    conf = get_config()["configurable"]
+    adapter = (
+        None
+        if response_schema is None or isinstance(response_schema, dict)
+        else TypeAdapter(response_schema)
+    )
    # track interrupt index
    scratchpad = conf[CONFIG_KEY_SCRATCHPAD]
    idx = scratchpad.interrupt_counter()
    # find previous resume values
    if scratchpad.resume:
        if idx < len(scratchpad.resume):
-            conf[CONFIG_KEY_SEND]([(RESUME, scratchpad.resume)])
-            return scratchpad.resume[idx]
+            v = scratchpad.resume[idx]
+            validated = adapter.validate_python(v) if adapter else v
+            conf[CONFIG_KEY_SEND]([(RESUME, scratchpad.resume[: idx + 1])])
+            return validated
    # find current resume value
    v = scratchpad.get_null_resume(True)
    if v is not None:
        assert len(scratchpad.resume) == idx, (scratchpad.resume, idx)
+        validated = adapter.validate_python(v) if adapter else v
        scratchpad.resume.append(v)
        conf[CONFIG_KEY_SEND]([(RESUME, scratchpad.resume)])
-        return v
+        return validated
    # no resume value found
    raise GraphInterrupt(
        (
            Interrupt.from_ns(
                value=value,
                ns=conf[CONFIG_KEY_CHECKPOINT_NS],
+                response_schema=adapter.json_schema() if adapter else response_schema,
            ),
        )
    )
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"

 [project]
 name = "langgraph"
-version = "1.2.11"
+version = "1.2.12"
 description = "Building stateful, multi-actor applications with LLMs"
 authors = []
 requires-python = ">=3.10"
@@ -1,9 +1,14 @@
+from dataclasses import dataclass
+from typing import Any
+
 import pytest
 from langgraph.checkpoint.base import BaseCheckpointSaver
+from pydantic import BaseModel, ValidationError
 from typing_extensions import TypedDict

 from langgraph.graph import END, START, StateGraph
-from langgraph.types import Durability
+from langgraph.types import Command, Durability, Interrupt, interrupt
+from tests.any_str import AnyStr

 pytestmark = pytest.mark.anyio

@@ -90,3 +95,150 @@ async def test_interruption_without_state_updates_async(
    assert (await graph.aget_state(thread)).next == ()
    n_checkpoints = len([c async for c in graph.aget_state_history(thread)])
    assert n_checkpoints == (5 if durability != "exit" else 3)
+
+
+class Decision(BaseModel):
+    approved: bool
+    note: str | None = None
+
+
+class DecisionDict(TypedDict):
+    approved: bool
+
+
+@dataclass
+class DecisionData:
+    approved: bool
+
+
+RAW_SCHEMA = {"type": "object", "properties": {"approved": {"type": "boolean"}}}
+
+
+@pytest.mark.parametrize(
+    ("response_schema", "expected_schema", "expected_answer"),
+    [
+        (None, None, {"approved": True, "extra": 1}),
+        (RAW_SCHEMA, RAW_SCHEMA, {"approved": True, "extra": 1}),
+        (Decision, Decision.model_json_schema(), Decision(approved=True)),
+        (
+            DecisionDict,
+            {
+                "properties": {"approved": {"title": "Approved", "type": "boolean"}},
+                "required": ["approved"],
+                "title": "DecisionDict",
+                "type": "object",
+            },
+            {"approved": True},
+        ),
+        (
+            DecisionData,
+            {
+                "properties": {"approved": {"title": "Approved", "type": "boolean"}},
+                "required": ["approved"],
+                "title": "DecisionData",
+                "type": "object",
+            },
+            DecisionData(approved=True),
+        ),
+    ],
+    ids=["none", "raw_dict", "pydantic", "typeddict", "dataclass"],
+)
+def test_interrupt_response_schema(
+    sync_checkpointer: BaseCheckpointSaver,
+    response_schema: Any,
+    expected_schema: dict[str, Any] | None,
+    expected_answer: Any,
+) -> None:
+    class State(TypedDict):
+        answer: Any
+
+    def node(state: State) -> State:
+        return {
+            "answer": interrupt(
+                {"question": "approve?"}, response_schema=response_schema
+            )
+        }
+
+    graph = (
+        StateGraph(State)
+        .add_node("node", node)
+        .add_edge(START, "node")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": "1"}}
+    expected = Interrupt(
+        value={"question": "approve?"}, id=AnyStr(), response_schema=expected_schema
+    )
+
+    assert list(graph.stream({"answer": None}, config)) == [
+        {"__interrupt__": (expected,)}
+    ]
+    assert graph.get_state(config).tasks[0].interrupts == (expected,)
+    assert graph.invoke(Command(resume={"approved": True, "extra": 1}), config) == {
+        "answer": expected_answer
+    }
+
+
+@pytest.mark.parametrize("resume_style", ["null", "map"])
+def test_interrupt_response_schema_rejects_invalid_resume(
+    sync_checkpointer: BaseCheckpointSaver, resume_style: str
+) -> None:
+    class State(TypedDict):
+        answer: Any
+
+    def node(state: State) -> State:
+        return {"answer": interrupt("approve?", response_schema=Decision)}
+
+    graph = (
+        StateGraph(State)
+        .add_node("node", node)
+        .add_edge(START, "node")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": "1"}}
+    graph.invoke({"answer": None}, config)
+    [pending] = graph.get_state(config).tasks[0].interrupts
+
+    def resume(value: dict[str, Any]) -> Command:
+        return Command(resume=value if resume_style == "null" else {pending.id: value})
+
+    with pytest.raises(ValidationError, match="approved"):
+        graph.invoke(resume({"approved": "nope"}), config)
+
+    assert graph.invoke(resume({"approved": False}), config) == {
+        "answer": Decision(approved=False)
+    }
+
+
+@pytest.mark.parametrize("resume_style", ["null", "id_map"])
+def test_interrupt_response_schema_invalid_resume_after_earlier_interrupt(
+    sync_checkpointer: BaseCheckpointSaver, resume_style: str
+) -> None:
+    class State(TypedDict):
+        answer: Any
+
+    def node(state: State) -> State:
+        first = interrupt("first")
+        second = interrupt("approve?", response_schema=Decision)
+        return {"answer": [first, second]}
+
+    graph = (
+        StateGraph(State)
+        .add_node("node", node)
+        .add_edge(START, "node")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": "1"}}
+    graph.invoke({"answer": None}, config)
+    graph.invoke(Command(resume="ok"), config)
+    [pending] = graph.get_state(config).tasks[0].interrupts
+
+    def resume(value: dict[str, Any]) -> Command:
+        return Command(resume=value if resume_style == "null" else {pending.id: value})
+
+    with pytest.raises(ValidationError, match="approved"):
+        graph.invoke(resume({"approved": "nope"}), config)
+
+    assert graph.invoke(resume({"approved": True}), config) == {
+        "answer": ["ok", Decision(approved=True)]
+    }
@@ -5583,6 +5583,7 @@ def test_falsy_return_from_task(sync_checkpointer: BaseCheckpointSaver):
                "interrupts": [
                    {
                        "id": AnyStr(),
+                        "response_schema": None,
                        "value": "test",
                    },
                ],
@@ -5627,6 +5628,7 @@ def test_falsy_return_from_task(sync_checkpointer: BaseCheckpointSaver):
                        "interrupts": (
                            {
                                "id": AnyStr(),
+                                "response_schema": None,
                                "value": "test",
                            },
                        ),
@@ -1437,7 +1437,7 @@ wheels = [

 [[package]]
 name = "langgraph"
-version = "1.2.11"
+version = "1.2.12"
 source = { editable = "." }
 dependencies = [
    { name = "langchain-core" },
@@ -3404,11 +3404,11 @@ wheels = [

 [[package]]
 name = "soupsieve"
-version = "2.8.4"
+version = "2.9"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/47/2c/0a5f6f8ee0d5589e48c7640213ed5175d52cf540a06725b628cc1a45d6ce/soupsieve-2.8.4.tar.gz", hash = "sha256:e121fd02e975c695e4e9e8774a5ee35d74714b59307868dcc5319ad2d9e3328e", size = 121110, upload-time = "2026-05-24T13:55:57.154Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/80/f1/93422647dd7e461f23d254e6b2bfa687a85b53aeb4903fcdbb74474d4584/soupsieve-2.9.tar.gz", hash = "sha256:acee8417325c5653e1377dc31eccad59eb82cbc65942afe6174c53b3aaad63fc", size = 122122, upload-time = "2026-07-19T01:35:18.425Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/5e/f5/0c41cb68dcae6b7de4fac4188a3a9589e21fb31df21ea3a2e888db95e6c9/soupsieve-2.8.4-py3-none-any.whl", hash = "sha256:e7e6b0769c8f51ed59acab6e994b00621096cfb1c640a7509295987388fbaf65", size = 37304, upload-time = "2026-05-24T13:55:55.406Z" },
+    { url = "https://files.pythonhosted.org/packages/7b/d6/3185ab5ad1280319b31986898f3206dd7227cd75e293d4dba2a5e6bf27a0/soupsieve-2.9-py3-none-any.whl", hash = "sha256:a2b2c76d67df2382d245409fd71e321a571717e58463efa32ace87dcadac2c12", size = 37387, upload-time = "2026-07-19T01:35:17.106Z" },
 ]

 [[package]]
@@ -135,25 +135,18 @@ class ToolCallRequest:

    Attributes:
        tool_call: Tool call dict with name, args, and id from model output.
-
-            If an interceptor edits `tool_call["name"]` so it differs from `tool`,
-            `tool_call["name"]` is authoritative for what tool is executed.
        tool: BaseTool instance to be invoked, or None if tool is not
            registered with the `ToolNode`. When tool is `None`, interceptors can
            handle the request without validation. If the interceptor calls `execute()`,
            validation will occur and raise an error for unregistered tools.
        state: Agent state (`dict`, `list`, or `BaseModel`).
        runtime: LangGraph runtime context (optional, `None` if outside graph).
-        available_tools: Client-side tools registered with the `ToolNode`. Provider
-            and built-in tools are not included. Use this to resolve a replacement
-            tool when redirecting a call, and set `tool` to the resolved instance.
    """

    tool_call: ToolCall
    tool: BaseTool | None
    state: Any
    runtime: ToolRuntime
-    available_tools: list[BaseTool] = field(default_factory=list)

    def __setattr__(self, name: str, value: Any) -> None:
        """Raise deprecation warning when setting attributes directly.
@@ -343,27 +336,6 @@ def msg_content_output(output: Any) -> str | list[dict]:
        return str(output)


-class ToolCallRequestMismatchError(ValueError):
-    """`tool_call["name"]` and `tool` disagree on a `ToolCallRequest`."""
-
-
-def _check_not_redirected_without_tool(
-    request: ToolCallRequest, original_name: str, original_tool: BaseTool | None
-) -> None:
-    """Raise if an interceptor renamed the call but left `tool` as the resolved one."""
-    if (
-        original_tool is not None
-        and request.tool is original_tool
-        and request.tool_call["name"] != original_name
-    ):
-        msg = (
-            f"Interceptor set tool_call name to {request.tool_call['name']!r} but left "
-            f"`tool` as {original_tool.name!r}. Redirecting a call requires setting both; "
-            f"resolve the replacement from `ToolCallRequest.available_tools`."
-        )
-        raise ToolCallRequestMismatchError(msg)
-
-
 class ToolInvocationError(ToolException):
    """An error occurred while invoking a tool due to invalid arguments.

@@ -1065,7 +1037,6 @@ class ToolNode(RunnableCallable):
            tool=tool,
            state=tool_runtime.state,
            runtime=tool_runtime,
-            available_tools=list(self.tools_by_name.values()),
        )

        config = tool_runtime.config
@@ -1075,18 +1046,13 @@ class ToolNode(RunnableCallable):
            return self._execute_tool_sync(tool_request, input_type, config)

        # Define execute callable that can be called multiple times
-        original_name, original_tool = call["name"], tool
-
        def execute(req: ToolCallRequest) -> ToolMessage | Command:
            """Execute tool with given request. Can be called multiple times."""
-            _check_not_redirected_without_tool(req, original_name, original_tool)
            return self._execute_tool_sync(req, input_type, config)

        # Call wrapper with request and execute callable
        try:
            return self._wrap_tool_call(tool_request, execute)
-        except ToolCallRequestMismatchError:
-            raise
        except Exception as e:
            # Wrapper threw an exception
            if not self._handle_tool_errors:
@@ -1218,7 +1184,6 @@ class ToolNode(RunnableCallable):
            tool=tool,
            state=tool_runtime.state,
            runtime=tool_runtime,
-            available_tools=list(self.tools_by_name.values()),
        )

        config = tool_runtime.config
@@ -1228,16 +1193,12 @@ class ToolNode(RunnableCallable):
            return await self._execute_tool_async(tool_request, input_type, config)

        # Define async execute callable that can be called multiple times
-        original_name, original_tool = call["name"], tool
-
        async def execute(req: ToolCallRequest) -> ToolMessage | Command:
            """Execute tool with given request. Can be called multiple times."""
-            _check_not_redirected_without_tool(req, original_name, original_tool)
            return await self._execute_tool_async(req, input_type, config)

        def _sync_execute(req: ToolCallRequest) -> ToolMessage | Command:
            """Sync execute fallback for sync wrapper."""
-            _check_not_redirected_without_tool(req, original_name, original_tool)
            return self._execute_tool_sync(req, input_type, config)

        # Call wrapper with request and execute callable
@@ -1247,8 +1208,6 @@ class ToolNode(RunnableCallable):
            # None check was performed above already
            self._wrap_tool_call = cast("ToolCallWrapper", self._wrap_tool_call)
            return self._wrap_tool_call(tool_request, _sync_execute)
-        except ToolCallRequestMismatchError:
-            raise
        except Exception as e:
            # Wrapper threw an exception
            if not self._handle_tool_errors:
@@ -1,7 +1,7 @@
 """Unit tests for tool call interceptor in ToolNode."""

 import functools
-from collections.abc import Awaitable, Callable
+from collections.abc import Callable
 from unittest.mock import Mock

 import pytest
@@ -13,7 +13,6 @@ from langgraph.types import Command

 from langgraph.prebuilt.tool_node import (
    ToolCallRequest,
-    ToolCallRequestMismatchError,
    ToolNode,
 )

@@ -1472,118 +1471,3 @@ def test_tool_call_request_is_frozen() -> None:
    assert fresh_new_request.tool == add  # Other fields should remain the same
    assert fresh_new_request.state == state
    assert fresh_new_request.runtime is None
-
-
-async def test_interceptor_can_redirect_to_another_tool() -> None:
-    """Redirecting requires setting both `tool_call` and `tool`; routing follows them."""
-
-    @tool
-    def subtract(a: int, b: int) -> int:
-        """Subtract two numbers."""
-        return a - b
-
-    async def redirect(
-        request: ToolCallRequest,
-        execute: Callable[[ToolCallRequest], Awaitable[ToolMessage | Command]],
-    ) -> ToolMessage | Command:
-        target = next(t for t in request.available_tools if t.name == "subtract")
-        return await execute(
-            request.override(
-                tool_call={**request.tool_call, "name": "subtract"}, tool=target
-            )
-        )
-
-    node = ToolNode([add, subtract], awrap_tool_call=redirect)
-    result = await node.ainvoke(
-        [
-            AIMessage(
-                "",
-                tool_calls=[
-                    {
-                        "name": "add",
-                        "args": {"a": 5, "b": 3},
-                        "id": "1",
-                        "type": "tool_call",
-                    }
-                ],
-            )
-        ],
-        _create_config_with_runtime(),
-    )
-
-    # `add` would return 8; `subtract` returns 2.
-    assert result[0].content == "2"
-
-
-def test_interceptor_tool_call_name_and_tool_must_agree() -> None:
-    """Renaming `tool_call` without `tool` raises rather than running the wrong tool."""
-
-    def rename_only(
-        request: ToolCallRequest,
-        execute: Callable[[ToolCallRequest], ToolMessage | Command],
-    ) -> ToolMessage | Command:
-        return execute(
-            request.override(tool_call={**request.tool_call, "name": "other"})
-        )
-
-    @tool
-    def other(a: int, b: int) -> int:
-        """Another tool."""
-        return 0
-
-    # handle_tool_errors is on by default; the mismatch must not become a ToolMessage
-    node = ToolNode([add, other], wrap_tool_call=rename_only)
-    with pytest.raises(ToolCallRequestMismatchError, match="other"):
-        node.invoke(
-            [
-                AIMessage(
-                    "",
-                    tool_calls=[
-                        {
-                            "name": "add",
-                            "args": {"a": 1, "b": 2},
-                            "id": "1",
-                            "type": "tool_call",
-                        }
-                    ],
-                )
-            ],
-            _create_config_with_runtime(),
-        )
-
-
-async def test_sync_interceptor_under_ainvoke_also_validates_redirect() -> None:
-    """The sync-wrapper fallback used by `ainvoke` must validate too, not just `invoke`."""
-
-    def rename_only(
-        request: ToolCallRequest,
-        execute: Callable[[ToolCallRequest], ToolMessage | Command],
-    ) -> ToolMessage | Command:
-        return execute(
-            request.override(tool_call={**request.tool_call, "name": "other"})
-        )
-
-    @tool
-    def other(a: int, b: int) -> int:
-        """Another tool."""
-        return 0
-
-    # Only a sync wrapper is configured, so `ainvoke` routes through `_sync_execute`.
-    node = ToolNode([add, other], wrap_tool_call=rename_only)
-    with pytest.raises(ToolCallRequestMismatchError, match="other"):
-        await node.ainvoke(
-            [
-                AIMessage(
-                    "",
-                    tool_calls=[
-                        {
-                            "name": "add",
-                            "args": {"a": 1, "b": 2},
-                            "id": "1",
-                            "type": "tool_call",
-                        }
-                    ],
-                )
-            ],
-            _create_config_with_runtime(),
-        )
@@ -286,7 +286,7 @@ wheels = [

 [[package]]
 name = "langgraph"
-version = "1.2.11"
+version = "1.2.12"
 source = { editable = "../langgraph" }
 dependencies = [
    { name = "langchain-core" },
@@ -3,7 +3,7 @@ from langgraph_sdk.client import get_client, get_sync_client
 from langgraph_sdk.encryption import Encryption
 from langgraph_sdk.encryption.types import DecryptResult, EncryptionContext

-__version__ = "0.4.4"
+__version__ = "0.4.5"

 __all__ = [
    "Auth",
@@ -295,6 +295,8 @@ class Interrupt(TypedDict):
    """The value associated with the interrupt."""
    id: str
    """The ID of the interrupt. Can be used to resume the interrupt."""
+    response_schema: NotRequired[dict[str, Any]]
+    """JSON Schema for the value expected when resuming this interrupt, if the graph provided one."""


 class Thread(TypedDict):
@@ -29,7 +29,10 @@ def test_sync_extension_projection_yields_matching_custom_payloads():
        {"name": "progress", "step": 1},
        {"name": "progress", "step": 2},
    ]
-    assert "custom:progress" in fake.stream_request_bodies[-1]["channels"]
+    assert any(
+        "custom:progress" in body.get("channels", [])
+        for body in fake.stream_request_bodies
+    )


 def test_sync_extension_projection_supports_namespace_scope_on_subgraph_handle():
@@ -17,16 +17,16 @@ wheels = [

 [[package]]
 name = "anyio"
-version = "4.12.1"
+version = "4.15.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "exceptiongroup", marker = "python_full_version < '3.11'" },
    { name = "idna" },
-    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
+    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.15'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/96/f0/5eb65b2bb0d09ac6776f2eb54adee6abe8228ea05b20a5ad0e4945de8aac/anyio-4.12.1.tar.gz", hash = "sha256:41cfcc3a4c85d3f05c932da7c26d0201ac36f72abd4435ba90d0464a3ffed703", size = 228685, upload-time = "2026-01-06T11:45:21.246Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/a9/d2/f4d173e22df740bc37b1db102b386ba719b66e95b0f0d751f556b387e6d2/anyio-4.15.1.tar.gz", hash = "sha256:9f28306018cbd6d329e64a36d58256edff76dd996fe423bc957326e578b82a94", size = 276966, upload-time = "2026-09-05T10:42:39.44Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/38/0e/27be9fdef66e72d64c0cdc3cc2823101b80585f8119b5c112c2e8f5f7dab/anyio-4.12.1-py3-none-any.whl", hash = "sha256:d405828884fc140aa80a3c667b8beed277f1dfedec42ba031bd6ac3db606ab6c", size = 113592, upload-time = "2026-01-06T11:45:19.497Z" },
+    { url = "https://files.pythonhosted.org/packages/12/b8/4bd346e22b28902df4d651910f5242c28d84e4a5c2435ca5c3f797ed7e2e/anyio-4.15.1-py3-none-any.whl", hash = "sha256:6152fdbbf9a77fdec97731721bebf7c4c44f7c29b424b0065826173efc7ed101", size = 132079, upload-time = "2026-09-05T10:42:37.923Z" },
 ]

 [[package]]
@@ -181,7 +181,7 @@ name = "exceptiongroup"
 version = "1.3.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "typing-extensions" },
+    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" } },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/50/79/66800aadf48771f6b62f7eb014e352e5d06856655206165d775e675a02c9/exceptiongroup-1.3.1.tar.gz", hash = "sha256:8b412432c6055b0b7d14c310000ae93352ed6754f70fa8f7c34141f91c4e3219", size = 30371, upload-time = "2025-11-21T23:01:54.787Z" }
 wheels = [
@@ -277,7 +277,8 @@ dependencies = [
    { name = "pydantic" },
    { name = "pyyaml" },
    { name = "tenacity" },
-    { name = "typing-extensions" },
+    { name = "typing-extensions", version = "4.15.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.15'" },
+    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.15'" },
    { name = "uuid-utils" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/90/12/aff76ca89c219ebe6f9dd3c5dbc4e3b1cf5450e9fc7037dccad23d45cd7a/langchain_core-1.6.1.tar.gz", hash = "sha256:1b156cb395aac4f009a8a1b38a574c7d948fe2d5f74c96e0d8a5017b4149e04f", size = 1003359, upload-time = "2026-08-27T19:31:14.956Z" }
@@ -290,7 +291,8 @@ name = "langchain-protocol"
 version = "0.0.19"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "typing-extensions" },
+    { name = "typing-extensions", version = "4.15.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.15'" },
+    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.15'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/14/56/913599f2f9cec8524868929f12d72b2ede377a6056ca8a40a32bdadfa535/langchain_protocol-0.0.19.tar.gz", hash = "sha256:79d90a1425122ac87e8052e2ec054fbd09c3edbf341bdfb6397112a495c7bf8c", size = 6265, upload-time = "2026-08-26T21:12:00.703Z" }
 wheels = [
@@ -299,7 +301,7 @@ wheels = [

 [[package]]
 name = "langgraph"
-version = "1.2.11"
+version = "1.2.12"
 source = { editable = "../langgraph" }
 dependencies = [
    { name = "langchain-core" },
@@ -726,7 +728,8 @@ source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "annotated-types" },
    { name = "pydantic-core" },
-    { name = "typing-extensions" },
+    { name = "typing-extensions", version = "4.15.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.15'" },
+    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.15'" },
    { name = "typing-inspection" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/53/ef/fc4f868f4e2cee79f863883abffceff107875f569b848507319842d2a681/pydantic-2.13.5.tar.gz", hash = "sha256:51a9c5f7b2f8e636f04c6cada605d9b6a3bf1348fdf945a3d8869b19bba0ee08", size = 845750, upload-time = "2026-08-28T14:04:00.916Z" }
@@ -739,7 +742,8 @@ name = "pydantic-core"
 version = "2.46.5"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "typing-extensions" },
+    { name = "typing-extensions", version = "4.15.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.15'" },
+    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.15'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/af/f9/8a06bea35ef8daf588f707784c973a7046e0034c8d8cfb08828eeffb8b75/pydantic_core-2.46.5.tar.gz", hash = "sha256:10416c15b8839ecc4ef4d0885da76da6fd0f67333a0eb8aff6d93c4b8f2910fc", size = 472262, upload-time = "2026-08-28T10:01:31.677Z" }
 wheels = [
@@ -884,7 +888,7 @@ source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "backports-asyncio-runner", marker = "python_full_version < '3.11'" },
    { name = "pytest" },
-    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
+    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.13'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/43/7c/d36d04db312ecf4298932ef77e6e4a9e8ad017906e24e34f0b0c361a2473/pytest_asyncio-1.4.0.tar.gz", hash = "sha256:c6c0d2259945122819f171a32ecea2c349ead889ee28176caaf492143424be42", size = 58514, upload-time = "2026-05-26T09:56:04.083Z" }
 wheels = [
@@ -1037,7 +1041,7 @@ version = "1.6.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "anyio" },
-    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
+    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.13'" },
 ]
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@@ -1136,17 +1140,33 @@ wheels = [
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 version = "4.15.0"
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+    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.15'" },
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