From e3f6adfe1976a773704a20fef7bb03ac0309e0e4 Mon Sep 17 00:00:00 2001
From: ccurme <chester.curme@gmail.com>
Date: Thu, 27 Aug 2026 11:19:28 -0400
Subject: [PATCH] feat(anthropic): support top-level param for skills via
 `container`; `updates` thinking display mode (#39962)

---
 .../langchain_anthropic/chat_models.py        |  81 +++++++++++++--
 .../tests/cassettes/test_skills.yaml.gz       | Bin 0 -> 18682 bytes
 .../integration_tests/test_chat_models.py     |  70 ++++++++++++-
 .../tests/unit_tests/test_chat_models.py      |  96 ++++++++++++++++++
 4 files changed, 234 insertions(+), 13 deletions(-)
 create mode 100644 libs/partners/anthropic/tests/cassettes/test_skills.yaml.gz

diff --git a/libs/partners/anthropic/langchain_anthropic/chat_models.py b/libs/partners/anthropic/langchain_anthropic/chat_models.py
index bad2789fb1..10298786b2 100644
--- a/libs/partners/anthropic/langchain_anthropic/chat_models.py
+++ b/libs/partners/anthropic/langchain_anthropic/chat_models.py
@@ -177,7 +177,6 @@ class AnthropicTool(TypedDict):
 _TOOL_TYPE_TO_BETA: dict[str, str] = {
     "web_fetch_20250910": "web-fetch-2025-09-10",
     "code_execution_20250522": "code-execution-2025-05-22",
-    "code_execution_20250825": "code-execution-2025-08-25",
     "mcp_toolset": "mcp-client-2025-11-20",
     "memory_20250818": "context-management-2025-06-27",
     "computer_20250124": "computer-use-2025-01-24",
@@ -816,6 +815,15 @@ def _format_messages(
     return system, formatted_messages
 
 
+def _container_id(container: Any) -> str | None:
+    """Return the container ID from either accepted `container` shape."""
+    if isinstance(container, str):
+        return container
+    if isinstance(container, dict):
+        return container.get("id")
+    return None
+
+
 def _collect_code_execution_tool_ids(formatted_messages: list[dict]) -> set[str]:
     """Collect `tool_use` IDs that were called by `code_execution`.
 
@@ -1255,6 +1263,28 @@ class ChatAnthropic(BaseChatModel):
     [context management](https://platform.claude.com/docs/en/build-with-claude/context-editing).
     """
 
+    container: dict[str, Any] | str | None = None
+    """Code execution container for the request.
+
+    Either a container ID from a previous response, or a dict of container
+    parameters — notably
+    [skills](https://platform.claude.com/docs/en/build-with-claude/skills-guide)
+    to load into the container. Skills require a
+    [code execution](https://docs.langchain.com/oss/python/integrations/chat/anthropic#code-execution)
+    tool to be bound.
+
+    ```python
+    model = ChatAnthropic(
+        model="claude-opus-5",
+        container={
+            "skills": [{"type": "anthropic", "skill_id": "pptx", "version": "latest"}]
+        },
+    ).bind_tools([{"type": "code_execution_20260521", "name": "code_execution"}])
+    ```
+
+    Can also be passed at call time, which overrides the value set here.
+    """
+
     reuse_last_container: bool | None = None
     """Automatically reuse container from most recent response (code execution).
 
@@ -1582,6 +1612,7 @@ class ChatAnthropic(BaseChatModel):
             "betas": self.betas,
             "context_management": self.context_management,
             "mcp_servers": self.mcp_servers,
+            "container": self.container,
             "user_profile_id": self.user_profile_id,
             "system": system,
             **self.model_kwargs,
@@ -1667,19 +1698,43 @@ class ChatAnthropic(BaseChatModel):
             output_config = payload.setdefault("output_config", {})
             output_config["format"] = payload.pop("output_format")
 
-        if self.reuse_last_container:
-            # Check for most recent AIMessage with container set in response_metadata
-            # and set as a top-level param on the request
+        container = payload.get("container")
+
+        if self.reuse_last_container and not _container_id(container):
+            # Reuse the container from the most recent response (code execution)
             for message in reversed(messages):
                 if (
                     isinstance(message, AIMessage)
-                    and (container := message.response_metadata.get("container"))
-                    and isinstance(container, dict)
-                    and (container_id := container.get("id"))
+                    and isinstance(
+                        last_container := message.response_metadata.get("container"),
+                        dict,
+                    )
+                    and (container_id := last_container.get("id"))
                 ):
-                    payload["container"] = container_id
+                    payload["container"] = (
+                        {**container, "id": container_id}
+                        if isinstance(container, dict)
+                        else container_id
+                    )
                     break
 
+        if (
+            isinstance(container, dict)
+            and container.get("skills")
+            and not any(
+                isinstance(tool, dict)
+                and str(tool.get("type", "")).startswith("code_execution")
+                for tool in (payload.get("tools") or [])
+            )
+        ):
+            warnings.warn(
+                "Skills require a code execution tool to be bound, e.g. "
+                '`bind_tools([{"type": "code_execution_20260521", '
+                '"name": "code_execution"}])`.',
+                UserWarning,
+                stacklevel=2,
+            )
+
         # Note: Beta headers are no longer required for structured outputs
         # (output_config.format or strict tool use) as they are now generally available
         if "tools" in payload and isinstance(payload["tools"], list):
@@ -1731,6 +1786,16 @@ class ChatAnthropic(BaseChatModel):
             else:
                 payload["betas"] = [required_beta]
 
+        # Auto-append required beta for the `updates` thinking display mode
+        thinking = payload.get("thinking")
+        if isinstance(thinking, dict) and thinking.get("display") == "updates":
+            required_beta = "thinking-display-updates-2026-08-18"
+            if payload.get("betas"):
+                if required_beta not in payload["betas"]:
+                    payload["betas"] = [*payload["betas"], required_beta]
+            else:
+                payload["betas"] = [required_beta]
+
         # Auto-append required beta for user_profile_id
         if payload.get("user_profile_id"):
             required_beta = "user-profiles-2026-03-24"
diff --git a/libs/partners/anthropic/tests/cassettes/test_skills.yaml.gz b/libs/partners/anthropic/tests/cassettes/test_skills.yaml.gz
new file mode 100644
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HcmV?d00001

diff --git a/libs/partners/anthropic/tests/integration_tests/test_chat_models.py b/libs/partners/anthropic/tests/integration_tests/test_chat_models.py
index 905c8a3064..7c487c45bf 100644
--- a/libs/partners/anthropic/tests/integration_tests/test_chat_models.py
+++ b/libs/partners/anthropic/tests/integration_tests/test_chat_models.py
@@ -1884,17 +1884,22 @@ def test_code_execution_old(output_version: Literal["v0", "v1"]) -> None:
     )
 
 
+def _collect_file_ids(content: Any) -> list[str]:
+    """Recursively collect `file_id` values from response content."""
+    if isinstance(content, dict):
+        found = [content["file_id"]] if "file_id" in content else []
+        return found + [fid for v in content.values() for fid in _collect_file_ids(v)]
+    if isinstance(content, list):
+        return [fid for item in content for fid in _collect_file_ids(item)]
+    return []
+
+
 @pytest.mark.default_cassette("test_code_execution.yaml.gz")
 @pytest.mark.vcr
 @pytest.mark.parametrize("output_version", ["v0", "v1"])
 def test_code_execution(output_version: Literal["v0", "v1"]) -> None:
-    """Note: this is a beta feature.
-
-    TODO: Update to remove beta once generally available.
-    """
     llm = ChatAnthropic(
         model=MODEL_NAME,  # type: ignore[call-arg]
-        betas=["code-execution-2025-08-25"],
         output_version=output_version,
     )
 
@@ -1952,6 +1957,61 @@ def test_code_execution(output_version: Literal["v0", "v1"]) -> None:
     )
 
 
+@pytest.mark.default_cassette("test_skills.yaml.gz")
+@pytest.mark.vcr
+@pytest.mark.parametrize("output_version", ["v0", "v1"])
+def test_skills(output_version: Literal["v0", "v1"]) -> None:
+    """Load an Anthropic skill into the code execution container."""
+    skills = [{"type": "anthropic", "skill_id": "xlsx"}]
+    code_execution = {"type": "code_execution_20250825", "name": "code_execution"}
+    llm = ChatAnthropic(
+        model=MODEL_NAME,  # type: ignore[call-arg]
+        container={"skills": skills},
+        reuse_last_container=True,
+        output_version=output_version,
+    )
+    llm_with_tools = llm.bind_tools([code_execution])
+
+    input_message = {
+        "role": "user",
+        "content": "Create an xlsx file with a single cell containing the number 42.",
+    }
+
+    # Stream the first turn. `.output` blocks until the stream finishes and
+    # returns the aggregated message.
+    # `stream_events` is typed as `Iterator[Any]` on a bound model; the v3
+    # protocol returns a `ChatModelStream`.
+    stream = cast("Any", llm_with_tools.stream_events([input_message], version="v3"))
+    first_response = stream.output
+
+    # The skill ran in the container and wrote a file.
+    container_id = first_response.response_metadata["container"]["id"]
+    assert container_id
+    assert _collect_file_ids(first_response.content)
+
+    # `reuse_last_container` supplies the container ID on the next turn without
+    # dropping the skills.
+    messages: list = [
+        input_message,
+        first_response,
+        {"role": "user", "content": "Now change the cell to 43."},
+    ]
+    payload = llm._get_request_payload(messages, tools=[code_execution])
+    assert payload["container"] == {"id": container_id, "skills": skills}
+
+    # The aggregated stream is valid history, so the follow-up round-trips.
+    second_response = llm_with_tools.invoke(messages)
+    block_types = {block["type"] for block in second_response.content}  # type: ignore[index]
+    if output_version == "v0":
+        assert {
+            "text",
+            "server_tool_use",
+            "bash_code_execution_tool_result",
+        } <= block_types
+    else:
+        assert {"text", "server_tool_call", "server_tool_result"} <= block_types
+
+
 @pytest.mark.default_cassette("test_remote_mcp.yaml.gz")
 @pytest.mark.vcr
 @pytest.mark.parametrize("output_version", ["v0", "v1"])
diff --git a/libs/partners/anthropic/tests/unit_tests/test_chat_models.py b/libs/partners/anthropic/tests/unit_tests/test_chat_models.py
index 0f2c3802c4..6c40ccf632 100644
--- a/libs/partners/anthropic/tests/unit_tests/test_chat_models.py
+++ b/libs/partners/anthropic/tests/unit_tests/test_chat_models.py
@@ -4985,3 +4985,99 @@ def test_unrelated_type_error_propagates_unchanged() -> None:
         llm.invoke([HumanMessage(content="test")])
 
     assert exc_info.value is unrelated_error
+
+
+_CODE_EXECUTION_TOOL = [{"type": "code_execution_20250825", "name": "code_execution"}]
+_PPTX_SKILL = [{"type": "anthropic", "skill_id": "pptx", "version": "latest"}]
+
+
+def test_container_init_param() -> None:
+    """`container` set at construction is included in the payload."""
+    llm = ChatAnthropic(model=MODEL_NAME, container={"skills": _PPTX_SKILL})
+    payload = llm._get_request_payload(
+        [HumanMessage("Hello, world!")], tools=_CODE_EXECUTION_TOOL
+    )
+    assert payload["container"] == {"skills": _PPTX_SKILL}
+
+
+def test_container_runtime_overrides_init() -> None:
+    """A call-time `container` takes precedence over the init value."""
+    llm = ChatAnthropic(model=MODEL_NAME, container={"skills": _PPTX_SKILL})
+    payload = llm._get_request_payload(
+        [HumanMessage("Hello, world!")],
+        tools=_CODE_EXECUTION_TOOL,
+        container="container_runtime",
+    )
+    assert payload["container"] == "container_runtime"
+
+
+def test_container_merged_with_reused_container() -> None:
+    """`reuse_last_container` supplies an ID without dropping other keys."""
+    llm = ChatAnthropic(
+        model=MODEL_NAME, container={"skills": _PPTX_SKILL}, reuse_last_container=True
+    )
+    messages = [
+        HumanMessage("Hello, world!"),
+        AIMessage("Done.", response_metadata={"container": {"id": "container_123"}}),
+        HumanMessage("Now edit it."),
+    ]
+    payload = llm._get_request_payload(messages, tools=_CODE_EXECUTION_TOOL)
+    assert payload["container"] == {"id": "container_123", "skills": _PPTX_SKILL}
+
+
+def test_reuse_last_container_without_container_param() -> None:
+    """Without a `container`, a reused container is passed as a bare ID."""
+    llm = ChatAnthropic(model=MODEL_NAME, reuse_last_container=True)
+    messages = [
+        HumanMessage("Hello, world!"),
+        AIMessage("Done.", response_metadata={"container": {"id": "container_123"}}),
+        HumanMessage("Again."),
+    ]
+    payload = llm._get_request_payload(messages, tools=_CODE_EXECUTION_TOOL)
+    assert payload["container"] == "container_123"
+
+
+def test_reuse_last_container_does_not_override_explicit_id() -> None:
+    """An explicitly passed container ID wins over `reuse_last_container`."""
+    llm = ChatAnthropic(model=MODEL_NAME, reuse_last_container=True)
+    messages = [
+        HumanMessage("Hello, world!"),
+        AIMessage("Done.", response_metadata={"container": {"id": "container_123"}}),
+        HumanMessage("Again."),
+    ]
+    payload = llm._get_request_payload(
+        messages, tools=_CODE_EXECUTION_TOOL, container="container_explicit"
+    )
+    assert payload["container"] == "container_explicit"
+
+
+def test_container_absent_by_default() -> None:
+    """When unset, `container` is stripped from the payload."""
+    llm = ChatAnthropic(model=MODEL_NAME)
+    payload = llm._get_request_payload([HumanMessage("Hello, world!")])
+    assert "container" not in payload
+
+
+def test_skills_without_code_execution_tool_warns() -> None:
+    """Skills are inert without a code execution tool, so warn."""
+    llm = ChatAnthropic(model=MODEL_NAME, container={"skills": _PPTX_SKILL})
+    with pytest.warns(UserWarning, match="code execution tool"):
+        llm._get_request_payload([HumanMessage("Hello, world!")])
+
+
+def test_thinking_display_updates_enables_beta() -> None:
+    """`display="updates"` auto-enables its beta, routing through beta.messages."""
+    llm = ChatAnthropic(
+        model=MODEL_NAME, thinking={"type": "adaptive", "display": "updates"}
+    )
+    payload = llm._get_request_payload([HumanMessage("Hello, world!")])
+    assert "thinking-display-updates-2026-08-18" in payload["betas"]
+
+
+def test_thinking_display_summarized_does_not_enable_beta() -> None:
+    """Other `display` values are generally available."""
+    llm = ChatAnthropic(
+        model=MODEL_NAME, thinking={"type": "adaptive", "display": "summarized"}
+    )
+    payload = llm._get_request_payload([HumanMessage("Hello, world!")])
+    assert "betas" not in payload