chore: sync from ark-apis acc918f276

Auto-generated SDK sync from ark-apis at acc918f2764e20f2797d4e954bd18131bac2c82d.
Generated files are overwritten by the sync pipeline and should not be edited by hand.

Sync-Source-Commit: 48565b676b74fa8cd2919dce8e0c65eecc2da538
Ark-APIs-Commit: acc918f2764e20f2797d4e954bd18131bac2c82d

Author: ark-hand[bot]

src/arkruntime/types/session/__init__.py

@@ -23,6 +23,11 @@
 from .list_session_threads_response import ListSessionThreadsResponse
 from .list_sessions_order import ListSessionsOrder
 from .list_sessions_response import ListSessionsResponse
+from .managed_agents_agent_message_preview import ManagedAgentsAgentMessagePreview
+from .managed_agents_agent_thinking_preview import ManagedAgentsAgentThinkingPreview
+from .managed_agents_delta_content import ManagedAgentsDeltaContent
+from .managed_agents_delta_event import ManagedAgentsDeltaEvent
+from .managed_agents_delta_text_block import ManagedAgentsDeltaTextBlock
 from .managed_agents_document_block import ManagedAgentsDocumentBlock
 from .managed_agents_event_params import ManagedAgentsEventParams
 from .managed_agents_file_rubric_params import ManagedAgentsFileRubricParams
@@ -31,6 +36,9 @@
 from .managed_agents_rubric import ManagedAgentsRubric
 from .managed_agents_search_result_block import ManagedAgentsSearchResultBlock
 from .managed_agents_session_event import ManagedAgentsSessionEvent
+from .managed_agents_start_event import ManagedAgentsStartEvent
+from .managed_agents_start_event_preview import ManagedAgentsStartEventPreview
+from .managed_agents_stream_preview_event import ManagedAgentsStreamPreviewEvent
 from .managed_agents_system_content_block import ManagedAgentsSystemContentBlock
 from .managed_agents_system_message_event_params import (
     ManagedAgentsSystemMessageEventParams,
@@ -95,6 +103,11 @@
     "ListSessionThreadsResponse",
     "ListSessionsOrder",
     "ListSessionsResponse",
+    "ManagedAgentsAgentMessagePreview",
+    "ManagedAgentsAgentThinkingPreview",
+    "ManagedAgentsDeltaContent",
+    "ManagedAgentsDeltaEvent",
+    "ManagedAgentsDeltaTextBlock",
     "ManagedAgentsDocumentBlock",
     "ManagedAgentsEventParams",
     "ManagedAgentsFileRubricParams",
@@ -103,6 +116,9 @@
     "ManagedAgentsRubric",
     "ManagedAgentsSearchResultBlock",
     "ManagedAgentsSessionEvent",
+    "ManagedAgentsStartEvent",
+    "ManagedAgentsStartEventPreview",
+    "ManagedAgentsStreamPreviewEvent",
     "ManagedAgentsSystemContentBlock",
     "ManagedAgentsSystemMessageEventParams",
     "ManagedAgentsTextBlock",

src/arkruntime/types/session/managed_agents_agent_message_preview.py

@@ -0,0 +1,27 @@
+# Generated by datamodel-code-generator from ark-apis typespec/openapi.
+# DO NOT EDIT — regenerate with `make gen-py-<api>` in ark-apis.
+#
+# Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from typing import Literal
+
+from arkruntime._models import BaseModel
+
+
+class ManagedAgentsAgentMessagePreview(BaseModel):
+    """
+    `agent.message` 的流式预览标识。`id` 同时关联后续 `event_delta.event_id`
+    与最终完整 `agent.message.id`。
+    """
+
+    id: str
+    """
+    被预览事件的 id。
+    """
+    type: Literal["agent.message"]
+    """
+    固定 `"agent.message"`。
+    """

src/arkruntime/types/session/managed_agents_agent_thinking_preview.py

@@ -0,0 +1,27 @@
+# Generated by datamodel-code-generator from ark-apis typespec/openapi.
+# DO NOT EDIT — regenerate with `make gen-py-<api>` in ark-apis.
+#
+# Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from typing import Literal
+
+from arkruntime._models import BaseModel
+
+
+class ManagedAgentsAgentThinkingPreview(BaseModel):
+    """
+    `agent.thinking` 的流式预览标识。`id` 同时关联后续 `event_delta.event_id`
+    与最终完整 `agent.thinking.id`。
+    """
+
+    id: str
+    """
+    被预览事件的 id。
+    """
+    type: Literal["agent.thinking"]
+    """
+    固定 `"agent.thinking"`。
+    """

src/arkruntime/types/session/managed_agents_delta_content.py

@@ -0,0 +1,34 @@
+# Generated by datamodel-code-generator from ark-apis typespec/openapi.
+# DO NOT EDIT — regenerate with `make gen-py-<api>` in ark-apis.
+#
+# Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from typing import Literal, Optional
+
+from arkruntime._models import BaseModel
+
+from .managed_agents_delta_text_block import ManagedAgentsDeltaTextBlock
+
+
+class ManagedAgentsDeltaContent(BaseModel):
+    """
+    `event_delta.delta` 的 `content_delta` 载荷。`content` 是一个文本片段，
+    `index` 指定它落到最终事件 `content[]` 的位置。
+    """
+
+    type: Literal["content_delta"]
+    """
+    固定 `"content_delta"`，区别于 Messages API 的 `content_block_delta`。
+    """
+    content: ManagedAgentsDeltaTextBlock
+    """
+    与最终 `agent.message.content[]` / `agent.thinking.content[]` 元素同形的文本片段。
+    """
+    index: Optional[int] = None
+    """
+    最终 `content[]` 的下标。新 index 插入条目，已见过的 index 追加文本。
+    当前 agent-loop 总会写出该字段；公开层保留 optional 以兼容历史帧。
+    """

src/arkruntime/types/session/managed_agents_delta_event.py

@@ -0,0 +1,34 @@
+# Generated by datamodel-code-generator from ark-apis typespec/openapi.
+# DO NOT EDIT — regenerate with `make gen-py-<api>` in ark-apis.
+#
+# Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from typing import Literal
+
+from arkruntime._models import BaseModel
+
+from .managed_agents_delta_content import ManagedAgentsDeltaContent
+
+
+class ManagedAgentsDeltaEvent(BaseModel):
+    """
+    `event_delta`：仍在流式生成的事件增量。客户端用 `event_id` 反查前面的
+    `event_start.event.type`，并按 `(event_id, index)` 累积文本。该帧是
+    best-effort 预览，不进入事件历史，也不携带顶层 `id` / `processed_at`。
+    """
+
+    type: Literal["event_delta"]
+    """
+    固定 `"event_delta"`。
+    """
+    delta: ManagedAgentsDeltaContent
+    """
+    被预览事件的一个内容增量。
+    """
+    event_id: str
+    """
+    对应 `event_start.event.id`，也与最终完整 buffered 事件的 id 一致。
+    """

src/arkruntime/types/session/managed_agents_delta_text_block.py

@@ -0,0 +1,27 @@
+# Generated by datamodel-code-generator from ark-apis typespec/openapi.
+# DO NOT EDIT — regenerate with `make gen-py-<api>` in ark-apis.
+#
+# Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from typing import Literal
+
+from arkruntime._models import BaseModel
+
+
+class ManagedAgentsDeltaTextBlock(BaseModel):
+    """
+    `content_delta.content` 的文本片段。wire 形态与 buffered 事件中的 text block
+    相同；单独建模可在直接引用时保留必需的 `type: "text"` discriminator。
+    """
+
+    type: Literal["text"]
+    """
+    固定 `"text"`。
+    """
+    text: str
+    """
+    本帧新增的文本。
+    """

src/arkruntime/types/session/managed_agents_session_event.py

@@ -15,12 +15,14 @@ class ManagedAgentsSessionEvent(BaseModel):
     """
     会话流上的一个事件。`type` 是判别式，其余字段随 type 变化。SDK 层建议
     把这个模型作为出流事件的公共 envelope；具体 variant 的 payload 可以在
-    消费侧按 `type` 再解构。
+    消费侧按 `type` 再解构。`event_start` / `event_delta` 的强类型结构见
+    `ManagedAgentsStreamPreviewEvent`；这两种瞬时预览帧不携带 `id` /
+    `processed_at`。
     """
 
     type: str
     """
-    事件类型判别式，例如 `agent.message` / `span.outcome_evaluation_end` / `session.status_idle`。
+    事件类型判别式，例如 `agent.message` / `event_start` / `event_delta` / `session.status_idle`。
     """
     id: Optional[str] = None
     """

src/arkruntime/types/session/managed_agents_start_event.py

@@ -0,0 +1,31 @@
+# Generated by datamodel-code-generator from ark-apis typespec/openapi.
+# DO NOT EDIT — regenerate with `make gen-py-<api>` in ark-apis.
+#
+# Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from typing import Literal
+
+from arkruntime._models import BaseModel
+
+from .managed_agents_start_event_preview import ManagedAgentsStartEventPreview
+
+
+class ManagedAgentsStartEvent(BaseModel):
+    """
+    `event_start`：打开一次 buffered 事件的流式预览。该帧仅在流式接口通过
+    `event_deltas` opt-in 后出现，不进入事件历史，也不携带顶层 `id` /
+    `processed_at`。通常由相同 id 的完整 buffered 事件收尾；若模型请求中途
+    结束，则由对应的 `span.model_request_end` 关闭预览。
+    """
+
+    type: Literal["event_start"]
+    """
+    固定 `"event_start"`。
+    """
+    event: ManagedAgentsStartEventPreview
+    """
+    被预览的 `agent.message` 或 `agent.thinking`。
+    """

src/arkruntime/types/session/managed_agents_start_event_preview.py

@@ -0,0 +1,27 @@
+# Generated by datamodel-code-generator from ark-apis typespec/openapi.
+# DO NOT EDIT — regenerate with `make gen-py-<api>` in ark-apis.
+#
+# Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from typing import Annotated, Union
+
+from pydantic import Field
+from typing_extensions import TypeAliasType
+
+from .managed_agents_agent_message_preview import ManagedAgentsAgentMessagePreview
+from .managed_agents_agent_thinking_preview import ManagedAgentsAgentThinkingPreview
+
+ManagedAgentsStartEventPreview = TypeAliasType(
+    "ManagedAgentsStartEventPreview",
+    Annotated[
+        Union[ManagedAgentsAgentMessagePreview, ManagedAgentsAgentThinkingPreview],
+        Field(discriminator="type"),
+    ],
+)
+"""
+`event_start.event` 的 tagged union。目标事件的 `type` 决定后续
+`event_delta` 应累积到 `agent.message` 还是 `agent.thinking`。
+"""

src/arkruntime/types/session/managed_agents_stream_preview_event.py

@@ -0,0 +1,26 @@
+# Generated by datamodel-code-generator from ark-apis typespec/openapi.
+# DO NOT EDIT — regenerate with `make gen-py-<api>` in ark-apis.
+#
+# Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from typing import Annotated, Union
+
+from pydantic import Field
+from typing_extensions import TypeAliasType
+
+from .managed_agents_delta_event import ManagedAgentsDeltaEvent
+from .managed_agents_start_event import ManagedAgentsStartEvent
+
+ManagedAgentsStreamPreviewEvent = TypeAliasType(
+    "ManagedAgentsStreamPreviewEvent",
+    Annotated[
+        Union[ManagedAgentsStartEvent, ManagedAgentsDeltaEvent],
+        Field(discriminator="type"),
+    ],
+)
+"""
+流式预览新增的两种 SSE 帧。
+"""