release: langgraph and prebuilt 1.0.7 (#6712)

Allow overriding `tool` impl in `wrap_tool_call` in order to support
dynamically registered tools via middleware

libs/langgraph/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph"
-version = "1.0.6"
+version = "1.0.7"
 description = "Building stateful, multi-actor applications with LLMs"
 authors = []
 requires-python = ">=3.10"
@@ -27,7 +27,7 @@ dependencies = [
     "langchain-core>=0.1",
     "langgraph-checkpoint>=2.1.0,<5.0.0",
     "langgraph-sdk>=0.3.0,<0.4.0",
-    "langgraph-prebuilt>=1.0.2,<1.1.0",
+    "langgraph-prebuilt>=1.0.7,<1.1.0",
     "xxhash>=3.5.0",
     "pydantic>=2.7.4",
 ]

libs/langgraph/uv.lock

@@ -192,7 +192,7 @@ name = "blockbuster"
 version = "1.5.26"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "forbiddenfruit", marker = "python_full_version >= '3.11' and implementation_name == 'cpython'" },
+    { name = "forbiddenfruit", marker = "python_full_version >= '3.11' and python_full_version < '3.14' and implementation_name == 'cpython'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/55/e0/dcbab602790a576b0b94108c07e2c048e5897df7cc83722a89582d733987/blockbuster-1.5.26.tar.gz", hash = "sha256:cc3ce8c70fa852a97ee3411155f31e4ad2665cd1c6c7d2f8bb1851dab61dc629", size = 36085, upload-time = "2025-12-05T10:43:47.735Z" }
 wheels = [
@@ -384,7 +384,7 @@ name = "click"
 version = "8.3.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "colorama", marker = "sys_platform == 'win32'" },
+    { name = "colorama", marker = "python_full_version < '3.14' and sys_platform == 'win32'" },
 ]
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 wheels = [
@@ -527,7 +527,7 @@ name = "cryptography"
 version = "46.0.3"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "cffi", marker = "python_full_version >= '3.11' and platform_python_implementation != 'PyPy'" },
+    { name = "cffi", marker = "python_full_version >= '3.11' and python_full_version < '3.14' and platform_python_implementation != 'PyPy'" },
 ]
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 wheels = [
@@ -692,7 +692,7 @@ name = "googleapis-common-protos"
 version = "1.72.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "protobuf", marker = "python_full_version >= '3.11'" },
+    { name = "protobuf", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/e5/7b/adfd75544c415c487b33061fe7ae526165241c1ea133f9a9125a56b39fd8/googleapis_common_protos-1.72.0.tar.gz", hash = "sha256:e55a601c1b32b52d7a3e65f43563e2aa61bcd737998ee672ac9b951cd49319f5", size = 147433, upload-time = "2025-11-06T18:29:24.087Z" }
 wheels = [
@@ -704,7 +704,7 @@ name = "grpcio"
 version = "1.76.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "typing-extensions", marker = "python_full_version >= '3.11'" },
+    { name = "typing-extensions", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/b6/e0/318c1ce3ae5a17894d5791e87aea147587c9e702f24122cc7a5c8bbaeeb1/grpcio-1.76.0.tar.gz", hash = "sha256:7be78388d6da1a25c0d5ec506523db58b18be22d9c37d8d3a32c08be4987bd73", size = 12785182, upload-time = "2025-10-21T16:23:12.106Z" }
 wheels = [
@@ -765,8 +765,8 @@ name = "grpcio-health-checking"
 version = "1.76.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "grpcio", marker = "python_full_version >= '3.11'" },
-    { name = "protobuf", marker = "python_full_version >= '3.11'" },
+    { name = "grpcio", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "protobuf", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
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 wheels = [
@@ -778,9 +778,9 @@ name = "grpcio-tools"
 version = "1.75.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "grpcio", marker = "python_full_version >= '3.11'" },
-    { name = "protobuf", marker = "python_full_version >= '3.11'" },
-    { name = "setuptools", marker = "python_full_version >= '3.11'" },
+    { name = "grpcio", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "protobuf", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "setuptools", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
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 wheels = [
@@ -887,7 +887,7 @@ name = "importlib-metadata"
 version = "8.7.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "zipp", marker = "python_full_version >= '3.11'" },
+    { name = "zipp", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
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 wheels = [
@@ -1372,7 +1372,7 @@ wheels = [
 
 [[package]]
 name = "langgraph"
-version = "1.0.6"
+version = "1.0.7"
 source = { editable = "." }
 dependencies = [
     { name = "langchain-core" },
@@ -1518,33 +1518,33 @@ name = "langgraph-api"
 version = "0.6.39"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "cloudpickle", marker = "python_full_version >= '3.11'" },
-    { name = "cryptography", marker = "python_full_version >= '3.11'" },
-    { name = "grpcio", marker = "python_full_version >= '3.11'" },
-    { name = "grpcio-health-checking", marker = "python_full_version >= '3.11'" },
-    { name = "grpcio-tools", marker = "python_full_version >= '3.11'" },
-    { name = "httpx", marker = "python_full_version >= '3.11'" },
-    { name = "jsonschema-rs", marker = "python_full_version >= '3.11'" },
-    { name = "langchain-core", marker = "python_full_version >= '3.11'" },
-    { name = "langgraph", marker = "python_full_version >= '3.11'" },
-    { name = "langgraph-checkpoint", marker = "python_full_version >= '3.11'" },
-    { name = "langgraph-runtime-inmem", marker = "python_full_version >= '3.11'" },
-    { name = "langgraph-sdk", marker = "python_full_version >= '3.11'" },
-    { name = "langsmith", extra = ["otel"], marker = "python_full_version >= '3.11'" },
-    { name = "opentelemetry-api", marker = "python_full_version >= '3.11'" },
-    { name = "opentelemetry-exporter-otlp-proto-http", marker = "python_full_version >= '3.11'" },
-    { name = "opentelemetry-sdk", marker = "python_full_version >= '3.11'" },
-    { name = "orjson", marker = "python_full_version >= '3.11'" },
-    { name = "protobuf", marker = "python_full_version >= '3.11'" },
-    { name = "pyjwt", marker = "python_full_version >= '3.11'" },
-    { name = "sse-starlette", marker = "python_full_version >= '3.11'" },
-    { name = "starlette", marker = "python_full_version >= '3.11'" },
-    { name = "structlog", marker = "python_full_version >= '3.11'" },
-    { name = "tenacity", marker = "python_full_version >= '3.11'" },
-    { name = "truststore", marker = "python_full_version >= '3.11'" },
-    { name = "uuid-utils", marker = "python_full_version >= '3.11'" },
-    { name = "uvicorn", marker = "python_full_version >= '3.11'" },
-    { name = "watchfiles", marker = "python_full_version >= '3.11'" },
+    { name = "cloudpickle", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "cryptography", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "grpcio", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "grpcio-health-checking", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "grpcio-tools", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "httpx", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "jsonschema-rs", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "langchain-core", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "langgraph", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "langgraph-checkpoint", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "langgraph-runtime-inmem", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "langgraph-sdk", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "langsmith", extra = ["otel"], marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "opentelemetry-api", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "opentelemetry-exporter-otlp-proto-http", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "opentelemetry-sdk", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "orjson", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "protobuf", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "pyjwt", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "sse-starlette", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "starlette", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "structlog", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "tenacity", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "truststore", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "uuid-utils", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "uvicorn", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "watchfiles", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
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 wheels = [
@@ -1692,15 +1692,15 @@ test = [
 name = "langgraph-cli"
 source = { editable = "../cli" }
 dependencies = [
-    { name = "click" },
-    { name = "langgraph-sdk", marker = "python_full_version >= '3.11'" },
+    { name = "click", marker = "python_full_version < '3.14'" },
+    { name = "langgraph-sdk", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
 
 [package.optional-dependencies]
 inmem = [
-    { name = "langgraph-api", marker = "python_full_version >= '3.11'" },
-    { name = "langgraph-runtime-inmem", marker = "python_full_version >= '3.11'" },
-    { name = "python-dotenv" },
+    { name = "langgraph-api", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "langgraph-runtime-inmem", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "python-dotenv", marker = "python_full_version < '3.14'" },
 ]
 
 [package.metadata]
@@ -1740,7 +1740,7 @@ test = [
 
 [[package]]
 name = "langgraph-prebuilt"
-version = "1.0.6"
+version = "1.0.7"
 source = { editable = "../prebuilt" }
 dependencies = [
     { name = "langchain-core" },
@@ -1794,12 +1794,12 @@ name = "langgraph-runtime-inmem"
 version = "0.22.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "blockbuster", marker = "python_full_version >= '3.11'" },
-    { name = "langgraph", marker = "python_full_version >= '3.11'" },
-    { name = "langgraph-checkpoint", marker = "python_full_version >= '3.11'" },
-    { name = "sse-starlette", marker = "python_full_version >= '3.11'" },
-    { name = "starlette", marker = "python_full_version >= '3.11'" },
-    { name = "structlog", marker = "python_full_version >= '3.11'" },
+    { name = "blockbuster", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "langgraph", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "langgraph-checkpoint", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "sse-starlette", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "starlette", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "structlog", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
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 wheels = [
@@ -1868,9 +1868,9 @@ wheels = [
 
 [package.optional-dependencies]
 otel = [
-    { name = "opentelemetry-api", marker = "python_full_version >= '3.11'" },
-    { name = "opentelemetry-exporter-otlp-proto-http", marker = "python_full_version >= '3.11'" },
-    { name = "opentelemetry-sdk", marker = "python_full_version >= '3.11'" },
+    { name = "opentelemetry-api", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "opentelemetry-exporter-otlp-proto-http", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "opentelemetry-sdk", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
 
 [[package]]
@@ -2216,8 +2216,8 @@ name = "opentelemetry-api"
 version = "1.39.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "importlib-metadata", marker = "python_full_version >= '3.11'" },
-    { name = "typing-extensions", marker = "python_full_version >= '3.11'" },
+    { name = "importlib-metadata", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "typing-extensions", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
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 wheels = [
@@ -2229,7 +2229,7 @@ name = "opentelemetry-exporter-otlp-proto-common"
 version = "1.39.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "opentelemetry-proto", marker = "python_full_version >= '3.11'" },
+    { name = "opentelemetry-proto", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
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 wheels = [
@@ -2241,13 +2241,13 @@ name = "opentelemetry-exporter-otlp-proto-http"
 version = "1.39.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "googleapis-common-protos", marker = "python_full_version >= '3.11'" },
-    { name = "opentelemetry-api", marker = "python_full_version >= '3.11'" },
-    { name = "opentelemetry-exporter-otlp-proto-common", marker = "python_full_version >= '3.11'" },
-    { name = "opentelemetry-proto", marker = "python_full_version >= '3.11'" },
-    { name = "opentelemetry-sdk", marker = "python_full_version >= '3.11'" },
-    { name = "requests", marker = "python_full_version >= '3.11'" },
-    { name = "typing-extensions", marker = "python_full_version >= '3.11'" },
+    { name = "googleapis-common-protos", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "opentelemetry-api", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "opentelemetry-exporter-otlp-proto-common", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "opentelemetry-proto", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "opentelemetry-sdk", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "requests", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "typing-extensions", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
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 wheels = [
@@ -2259,7 +2259,7 @@ name = "opentelemetry-proto"
 version = "1.39.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "protobuf", marker = "python_full_version >= '3.11'" },
+    { name = "protobuf", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
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 wheels = [
@@ -2271,9 +2271,9 @@ name = "opentelemetry-sdk"
 version = "1.39.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "opentelemetry-api", marker = "python_full_version >= '3.11'" },
-    { name = "opentelemetry-semantic-conventions", marker = "python_full_version >= '3.11'" },
-    { name = "typing-extensions", marker = "python_full_version >= '3.11'" },
+    { name = "opentelemetry-api", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "opentelemetry-semantic-conventions", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "typing-extensions", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/eb/fb/c76080c9ba07e1e8235d24cdcc4d125ef7aa3edf23eb4e497c2e50889adc/opentelemetry_sdk-1.39.1.tar.gz", hash = "sha256:cf4d4563caf7bff906c9f7967e2be22d0d6b349b908be0d90fb21c8e9c995cc6", size = 171460, upload-time = "2025-12-11T13:32:49.369Z" }
 wheels = [
@@ -2285,8 +2285,8 @@ name = "opentelemetry-semantic-conventions"
 version = "0.60b1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "opentelemetry-api", marker = "python_full_version >= '3.11'" },
-    { name = "typing-extensions", marker = "python_full_version >= '3.11'" },
+    { name = "opentelemetry-api", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "typing-extensions", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/91/df/553f93ed38bf22f4b999d9be9c185adb558982214f33eae539d3b5cd0858/opentelemetry_semantic_conventions-0.60b1.tar.gz", hash = "sha256:87c228b5a0669b748c76d76df6c364c369c28f1c465e50f661e39737e84bc953", size = 137935, upload-time = "2025-12-11T13:32:50.487Z" }
 wheels = [
@@ -3469,9 +3469,9 @@ name = "sse-starlette"
 version = "2.1.3"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "anyio", marker = "python_full_version >= '3.11'" },
-    { name = "starlette", marker = "python_full_version >= '3.11'" },
-    { name = "uvicorn", marker = "python_full_version >= '3.11'" },
+    { name = "anyio", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "starlette", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "uvicorn", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/72/fc/56ab9f116b2133521f532fce8d03194cf04dcac25f583cf3d839be4c0496/sse_starlette-2.1.3.tar.gz", hash = "sha256:9cd27eb35319e1414e3d2558ee7414487f9529ce3b3cf9b21434fd110e017169", size = 19678, upload-time = "2024-08-01T08:52:50.248Z" }
 wheels = [
@@ -3497,7 +3497,7 @@ name = "starlette"
 version = "0.51.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "anyio", marker = "python_full_version >= '3.11'" },
+    { name = "anyio", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
     { name = "typing-extensions", marker = "python_full_version >= '3.11' and python_full_version < '3.13'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/e7/65/5a1fadcc40c5fdc7df421a7506b79633af8f5d5e3a95c3e72acacec644b9/starlette-0.51.0.tar.gz", hash = "sha256:4c4fda9b1bc67f84037d3d14a5112e523509c369d9d47b111b2f984b0cc5ba6c", size = 2647658, upload-time = "2026-01-10T20:23:15.043Z" }
@@ -3746,8 +3746,8 @@ name = "uvicorn"
 version = "0.40.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "click", marker = "python_full_version >= '3.11'" },
-    { name = "h11", marker = "python_full_version >= '3.11'" },
+    { name = "click", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
+    { name = "h11", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/c3/d1/8f3c683c9561a4e6689dd3b1d345c815f10f86acd044ee1fb9a4dcd0b8c5/uvicorn-0.40.0.tar.gz", hash = "sha256:839676675e87e73694518b5574fd0f24c9d97b46bea16df7b8c05ea1a51071ea", size = 81761, upload-time = "2025-12-21T14:16:22.45Z" }
 wheels = [
@@ -3823,7 +3823,7 @@ name = "watchfiles"
 version = "1.1.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "anyio", marker = "python_full_version >= '3.11'" },
+    { name = "anyio", marker = "python_full_version >= '3.11' and python_full_version < '3.14'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/c2/c9/8869df9b2a2d6c59d79220a4db37679e74f807c559ffe5265e08b227a210/watchfiles-1.1.1.tar.gz", hash = "sha256:a173cb5c16c4f40ab19cecf48a534c409f7ea983ab8fed0741304a1c0a31b3f2", size = 94440, upload-time = "2025-10-14T15:06:21.08Z" }
 wheels = [

libs/prebuilt/langgraph/prebuilt/tool_node.py

@@ -121,6 +121,7 @@ class _ToolCallRequestOverrides(TypedDict, total=False):
     """Possible overrides for ToolCallRequest.override() method."""
 
     tool_call: ToolCall
+    tool: BaseTool
     state: Any
 
 

libs/prebuilt/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-prebuilt"
-version = "1.0.6"
+version = "1.0.7"
 description = "Library with high-level APIs for creating and executing LangGraph agents and tools."
 authors = []
 requires-python = ">=3.10"

libs/prebuilt/tests/test_tool_node_interceptor_unregistered.py

@@ -220,7 +220,10 @@ def test_unregistered_tool_error_when_interceptor_calls_execute() -> None:
     )
     # Should get validation error message
     assert result[0].status == "error"
-    assert "is not a valid tool" in result[0].content
+    assert (
+        result[0].content
+        == "Error: unregistered_tool is not a valid tool, try one of [registered_tool]."
+    )
     assert result[0].tool_call_id == "2"
 
 
@@ -576,3 +579,226 @@ def test_interceptor_verifies_tool_is_none_for_unregistered() -> None:
     assert len(captured_requests) == 1
     assert captured_requests[0].tool is not None
     assert captured_requests[0].tool.name == "registered_tool"
+
+
+def test_wrap_tool_call_override_unregistered_tool_with_custom_impl() -> None:
+    """Test that wrap_tool_call can provide custom implementation for unregistered tool."""
+    called = False
+
+    @dec_tool
+    def custom_tool_impl() -> str:
+        """Custom tool implementation."""
+        nonlocal called
+        called = True
+        return "custom result"
+
+    def hook(
+        request: ToolCallRequest,
+        execute: Callable[[ToolCallRequest], ToolMessage | Command],
+    ) -> ToolMessage | Command:
+        if request.tool_call["name"] == "custom_tool":
+            assert request.tool is None  # Unregistered tools have tool=None
+            return execute(request.override(tool=custom_tool_impl))
+        return execute(request)
+
+    node = ToolNode([registered_tool], wrap_tool_call=hook)
+
+    result = node.invoke(
+        [
+            AIMessage(
+                "",
+                tool_calls=[
+                    {"name": "custom_tool", "args": {}, "id": "1", "type": "tool_call"}
+                ],
+            )
+        ],
+        config=_create_config_with_runtime(),
+    )
+
+    assert called
+    assert result[0].content == "custom result"
+    assert result[0].tool_call_id == "1"
+
+
+async def test_awrap_tool_call_override_unregistered_tool_with_custom_impl() -> None:
+    """Test that awrap_tool_call can provide custom implementation for unregistered tool."""
+    called = False
+
+    @dec_tool
+    def custom_async_tool_impl() -> str:
+        """Custom async tool implementation."""
+        nonlocal called
+        called = True
+        return "async custom result"
+
+    async def hook(
+        request: ToolCallRequest,
+        execute: Callable[[ToolCallRequest], Awaitable[ToolMessage | Command]],
+    ) -> ToolMessage | Command:
+        if request.tool_call["name"] == "custom_async_tool":
+            assert request.tool is None  # Unregistered tools have tool=None
+            return await execute(request.override(tool=custom_async_tool_impl))
+        return await execute(request)
+
+    node = ToolNode([registered_tool], awrap_tool_call=hook)
+
+    result = await node.ainvoke(
+        [
+            AIMessage(
+                "",
+                tool_calls=[
+                    {
+                        "name": "custom_async_tool",
+                        "args": {},
+                        "id": "1",
+                        "type": "tool_call",
+                    }
+                ],
+            )
+        ],
+        config=_create_config_with_runtime(),
+    )
+
+    assert called
+    assert result[0].content == "async custom result"
+    assert result[0].tool_call_id == "1"
+
+
+def test_graceful_failure_when_hook_does_not_override_unregistered_tool_sync() -> None:
+    """Test graceful failure when hook doesn't override unregistered tool."""
+
+    def passthrough_hook(
+        request: ToolCallRequest,
+        execute: Callable[[ToolCallRequest], ToolMessage | Command],
+    ) -> ToolMessage | Command:
+        return execute(request)
+
+    node = ToolNode(
+        [registered_tool],
+        wrap_tool_call=passthrough_hook,
+        handle_tool_errors=True,
+    )
+
+    result = node.invoke(
+        [
+            AIMessage(
+                "",
+                tool_calls=[
+                    {"name": "nonexistent", "args": {}, "id": "1", "type": "tool_call"}
+                ],
+            )
+        ],
+        config=_create_config_with_runtime(),
+    )
+
+    assert result[0].status == "error"
+    assert result[0].tool_call_id == "1"
+    assert (
+        result[0].content
+        == "Error: nonexistent is not a valid tool, try one of [registered_tool]."
+    )
+
+
+def test_graceful_failure_even_when_handle_errors_disabled_sync() -> None:
+    """Test that unregistered tool validation returns error even with handle_tool_errors=False."""
+
+    def passthrough_hook(
+        request: ToolCallRequest,
+        execute: Callable[[ToolCallRequest], ToolMessage | Command],
+    ) -> ToolMessage | Command:
+        return execute(request)
+
+    node = ToolNode(
+        [registered_tool],
+        wrap_tool_call=passthrough_hook,
+        handle_tool_errors=False,
+    )
+
+    result = node.invoke(
+        [
+            AIMessage(
+                "",
+                tool_calls=[
+                    {"name": "missing", "args": {}, "id": "1", "type": "tool_call"}
+                ],
+            )
+        ],
+        config=_create_config_with_runtime(),
+    )
+
+    assert result[0].status == "error"
+    assert (
+        result[0].content
+        == "Error: missing is not a valid tool, try one of [registered_tool]."
+    )
+
+
+async def test_graceful_failure_when_hook_does_not_override_unregistered_tool_async() -> (
+    None
+):
+    """Test graceful failure when async hook doesn't override unregistered tool."""
+
+    async def passthrough_hook(
+        request: ToolCallRequest,
+        execute: Callable[[ToolCallRequest], Awaitable[ToolMessage | Command]],
+    ) -> ToolMessage | Command:
+        return await execute(request)
+
+    node = ToolNode(
+        [registered_tool],
+        awrap_tool_call=passthrough_hook,
+        handle_tool_errors=True,
+    )
+
+    result = await node.ainvoke(
+        [
+            AIMessage(
+                "",
+                tool_calls=[
+                    {"name": "unknown", "args": {}, "id": "1", "type": "tool_call"}
+                ],
+            )
+        ],
+        config=_create_config_with_runtime(),
+    )
+
+    assert result[0].status == "error"
+    assert result[0].tool_call_id == "1"
+    assert (
+        result[0].content
+        == "Error: unknown is not a valid tool, try one of [registered_tool]."
+    )
+
+
+async def test_graceful_failure_even_when_handle_errors_disabled_async() -> None:
+    """Test that async unregistered tool validation returns error even with handle_tool_errors=False."""
+
+    async def passthrough_hook(
+        request: ToolCallRequest,
+        execute: Callable[[ToolCallRequest], Awaitable[ToolMessage | Command]],
+    ) -> ToolMessage | Command:
+        return await execute(request)
+
+    node = ToolNode(
+        [registered_tool],
+        awrap_tool_call=passthrough_hook,
+        handle_tool_errors=False,
+    )
+
+    result = await node.ainvoke(
+        [
+            AIMessage(
+                "",
+                tool_calls=[
+                    {"name": "missing", "args": {}, "id": "1", "type": "tool_call"}
+                ],
+            )
+        ],
+        config=_create_config_with_runtime(),
+    )
+
+    assert result[0].status == "error"
+    assert (
+        result[0].content
+        == "Error: missing is not a valid tool, try one of [registered_tool]."
+    )

libs/prebuilt/uv.lock

@@ -268,7 +268,7 @@ wheels = [
 
 [[package]]
 name = "langgraph"
-version = "1.0.6"
+version = "1.0.7"
 source = { editable = "../langgraph" }
 dependencies = [
     { name = "langchain-core" },
@@ -489,7 +489,7 @@ test = [
 
 [[package]]
 name = "langgraph-prebuilt"
-version = "1.0.6"
+version = "1.0.7"
 source = { editable = "." }
 dependencies = [
     { name = "langchain-core" },