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kgod
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"""Python bindings for the LangChain agent streaming protocol."""
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from langchain_protocol.protocol import * # noqa: F403
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# compiled with https://www.npmjs.com/package/cddl2py v0.2.2
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from __future__ import annotations
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from typing import Annotated, Any, Literal, Union
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from typing_extensions import NotRequired, TypedDict
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JsInt = int
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JsUint = int
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Namespace = list[str]
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Extensible = dict[str, Any]
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Timestamp = int
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MetadataScalar = Union[None, bool, int, float, str]
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MessageRole = Union[Literal["ai"], Literal["human"], Literal["system"]]
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||||
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||||
class MessageMetadata(TypedDict, extra_items=MetadataScalar):
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provider: NotRequired[str]
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model: NotRequired[str]
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model_type: NotRequired[str]
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||||
run_id: NotRequired[str]
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||||
thread_id: NotRequired[str]
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||||
system_fingerprint: NotRequired[str]
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||||
service_tier: NotRequired[str]
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||||
|
||||
class TextContentBlock(TypedDict):
|
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type: Literal["text"]
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text: str
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||||
id: NotRequired[str]
|
||||
index: NotRequired[BlockIndex]
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||||
annotations: NotRequired[list[Annotation]]
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||||
|
||||
class InvalidToolCall(TypedDict):
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type: Literal["invalid_tool_call"]
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id: Union[str, None]
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name: Union[str, None]
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args: Union[str, None]
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error: Union[str, None]
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index: NotRequired[BlockIndex]
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||||
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||||
class ReasoningContentBlock(TypedDict):
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type: Literal["reasoning"]
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reasoning: NotRequired[str]
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id: NotRequired[str]
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||||
index: NotRequired[BlockIndex]
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||||
|
||||
class NonStandardContentBlock(TypedDict):
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||||
type: Literal["non_standard"]
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value: dict[str, Any]
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||||
id: NotRequired[str]
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||||
index: NotRequired[BlockIndex]
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||||
|
||||
class ImageContentBlock(TypedDict):
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type: Literal["image"]
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id: NotRequired[str]
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||||
file_id: NotRequired[str]
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||||
url: NotRequired[str]
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||||
base64: NotRequired[str] # Base64-encoded image data
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mime_type: NotRequired[str]
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||||
index: NotRequired[BlockIndex]
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||||
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class VideoContentBlock(TypedDict):
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type: Literal["video"]
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id: NotRequired[str]
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file_id: NotRequired[str]
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||||
url: NotRequired[str]
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||||
base64: NotRequired[str] # Base64-encoded video data
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mime_type: NotRequired[str]
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index: NotRequired[BlockIndex]
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class AudioContentBlock(TypedDict):
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type: Literal["audio"]
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id: NotRequired[str]
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file_id: NotRequired[str]
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url: NotRequired[str]
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base64: NotRequired[str] # Base64-encoded audio data
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mime_type: NotRequired[str]
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index: NotRequired[BlockIndex]
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class FileContentBlock(TypedDict):
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type: Literal["file"]
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id: NotRequired[str]
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file_id: NotRequired[str]
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||||
url: NotRequired[str]
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||||
base64: NotRequired[str] # Base64-encoded file data
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mime_type: NotRequired[str]
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index: NotRequired[BlockIndex]
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DataContentBlock = Union[ImageContentBlock, VideoContentBlock, AudioContentBlock, FileContentBlock]
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class ToolCall(TypedDict):
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type: Literal["tool_call"]
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id: Union[str, None]
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name: str
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args: dict[str, Any]
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index: NotRequired[BlockIndex]
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class ToolCallChunk(TypedDict):
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type: Literal["tool_call_chunk"]
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id: Union[str, None]
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name: Union[str, None]
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args: Union[str, None] # Partial JSON string
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index: NotRequired[BlockIndex]
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class ServerToolCall(TypedDict):
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type: Literal["server_tool_call"]
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id: str
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name: str
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args: dict[str, Any]
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index: NotRequired[BlockIndex]
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class ServerToolCallChunk(TypedDict):
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type: Literal["server_tool_call_chunk"]
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id: NotRequired[str]
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name: NotRequired[str]
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args: NotRequired[str]
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index: NotRequired[BlockIndex]
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class ServerToolResult(TypedDict):
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type: Literal["server_tool_result"]
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tool_call_id: str
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status: Union[Literal["success"], Literal["error"]]
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id: NotRequired[str]
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output: NotRequired[Any]
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index: NotRequired[BlockIndex]
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ToolContentBlock = Union[ToolCall, ToolCallChunk, ServerToolCall, ServerToolCallChunk, ServerToolResult]
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ContentBlock = Union[TextContentBlock, InvalidToolCall, ReasoningContentBlock, NonStandardContentBlock, DataContentBlock, ToolContentBlock]
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FinalizedContentBlock = Union[TextContentBlock, ReasoningContentBlock, ToolCall, InvalidToolCall, ServerToolCall, ServerToolResult, DataContentBlock, NonStandardContentBlock]
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BlockIndex = Union[JsInt, str]
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class Citation(TypedDict):
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type: Literal["citation"]
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id: NotRequired[str]
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url: NotRequired[str]
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title: NotRequired[str]
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start_index: NotRequired[int]
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end_index: NotRequired[int]
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cited_text: NotRequired[str]
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class NonStandardAnnotation(TypedDict):
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type: Literal["non_standard_annotation"]
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id: NotRequired[str]
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value: dict[str, Any]
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Annotation = Union[Citation, NonStandardAnnotation]
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class TextDelta(TypedDict):
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type: Literal["text-delta"]
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text: str
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class ReasoningDelta(TypedDict):
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type: Literal["reasoning-delta"]
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reasoning: str
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class DataDelta(TypedDict):
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type: Literal["data-delta"]
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data: str # Encoded data chunk to append
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encoding: NotRequired[Literal["base64"]] # Defaults to base64 when absent
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||||
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class BlockDeltaFields(TypedDict, extra_items=Any):
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type: str
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||||
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class BlockDelta(TypedDict):
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type: Literal["block-delta"]
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fields: BlockDeltaFields
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ContentBlockDelta = Union[TextDelta, ReasoningDelta, DataDelta, BlockDelta]
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class RunStart(TypedDict):
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method: Literal["run.start"]
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params: RunStartParams
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class SubscriptionSubscribe(TypedDict):
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method: Literal["subscription.subscribe"]
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params: SubscribeParams
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class SubscriptionUnsubscribe(TypedDict):
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method: Literal["subscription.unsubscribe"]
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params: UnsubscribeParams
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||||
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class SubscriptionReconnect(TypedDict):
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method: Literal["subscription.reconnect"]
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params: ReconnectParams
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SubscriptionCommand = Union[SubscriptionSubscribe, SubscriptionUnsubscribe, SubscriptionReconnect]
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class AgentGetTree(TypedDict):
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method: Literal["agent.getTree"]
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params: AgentGetTreeParams
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class InputRespond(TypedDict):
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method: Literal["input.respond"]
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params: InputRespondParams
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class InputInject(TypedDict):
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method: Literal["input.inject"]
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params: InputInjectParams
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InputCommand = Union[InputRespond, InputInject]
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class StateGet(TypedDict):
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method: Literal["state.get"]
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params: StateGetParams
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class StateListCheckpoints(TypedDict):
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method: Literal["state.listCheckpoints"]
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params: ListCheckpointsParams
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class StateFork(TypedDict):
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method: Literal["state.fork"]
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params: StateForkParams
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StateCommand = Union[StateGet, StateListCheckpoints, StateFork]
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class _CommandFields(TypedDict):
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id: JsUint
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class _CommandVariant1(_CommandFields, SubscriptionSubscribe):
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pass
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class _CommandVariant2(_CommandFields, SubscriptionUnsubscribe):
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pass
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class _CommandVariant3(_CommandFields, SubscriptionReconnect):
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pass
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class _CommandVariant5(_CommandFields, InputRespond):
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pass
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class _CommandVariant6(_CommandFields, InputInject):
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pass
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class _CommandVariant7(_CommandFields, StateGet):
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pass
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class _CommandVariant8(_CommandFields, StateListCheckpoints):
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pass
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class _CommandVariant9(_CommandFields, StateFork):
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pass
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class CommandResponse(TypedDict):
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type: Literal["success"]
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id: JsUint
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result: ResultData
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meta: NotRequired[ResponseMeta]
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class ErrorResponse(TypedDict):
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type: Literal["error"]
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id: Union[JsUint, None]
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error: ErrorCode
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message: str
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stacktrace: NotRequired[str]
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meta: NotRequired[ResponseMeta]
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class LifecycleEvent(TypedDict):
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method: Literal["lifecycle"]
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params: dict[str, Any]
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class MessagesEvent(TypedDict):
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method: Literal["messages"]
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params: dict[str, Any]
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class ToolsEvent(TypedDict):
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method: Literal["tools"]
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params: dict[str, Any]
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class InputEvent(TypedDict):
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method: Literal["input.requested"]
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params: dict[str, Any]
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||||
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class ValuesEvent(TypedDict):
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method: Literal["values"]
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params: dict[str, Any]
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||||
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class UpdatesEvent(TypedDict):
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method: Literal["updates"]
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params: dict[str, Any]
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||||
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class CheckpointsEvent(TypedDict):
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method: Literal["checkpoints"]
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params: dict[str, Any]
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||||
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class CustomEvent(TypedDict):
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method: Literal["custom"]
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||||
params: dict[str, Any]
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||||
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class TasksEvent(TypedDict):
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method: Literal["tasks"]
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||||
params: dict[str, Any]
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EventData = Union[LifecycleEvent, MessagesEvent, ToolsEvent, InputEvent, ValuesEvent, UpdatesEvent, CheckpointsEvent, CustomEvent, TasksEvent]
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class _EventFields(TypedDict):
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||||
type: Literal["event"]
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||||
event_id: NotRequired[str] # Unique ID for reconnection (maps to SSE id:)
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seq: NotRequired[JsUint] # Monotonic sequence number for ordering
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||||
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class _EventVariant0(_EventFields, LifecycleEvent):
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pass
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class _EventVariant1(_EventFields, MessagesEvent):
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pass
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class _EventVariant2(_EventFields, ToolsEvent):
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pass
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||||
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class _EventVariant3(_EventFields, InputEvent):
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pass
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||||
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class _EventVariant4(_EventFields, ValuesEvent):
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pass
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class _EventVariant5(_EventFields, UpdatesEvent):
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pass
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class _EventVariant6(_EventFields, CheckpointsEvent):
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pass
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class _EventVariant7(_EventFields, CustomEvent):
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pass
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class _EventVariant8(_EventFields, TasksEvent):
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pass
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Event = Union[_EventVariant0, _EventVariant1, _EventVariant2, _EventVariant3, _EventVariant4, _EventVariant5, _EventVariant6, _EventVariant7, _EventVariant8]
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Message = Union[CommandResponse, ErrorResponse, Event]
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class RunResult(TypedDict):
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run_id: NotRequired[str] # ID of the started or resumed run
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class SubscribeResult(TypedDict):
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subscription_id: str
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replayed_events: NotRequired[int] # Events replayed from buffer
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class ReconnectResult(TypedDict):
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restored: bool
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missed_events: NotRequired[int]
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current_namespaces: NotRequired[list[AgentStatusEntry]]
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class EmptyResult(TypedDict):
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pass
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class AgentResult(TypedDict):
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tree: AgentTreeNode
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class StateGetResult(TypedDict):
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values: dict[str, Any]
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checkpoint: NotRequired[CheckpointRef]
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class ListCheckpointsResult(TypedDict):
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checkpoints: list[CheckpointSummary]
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class StateForkResult(TypedDict):
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run_id: str
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thread_id: str
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ErrorCode = Union[Literal["invalid_argument"], Literal["unknown_command"], Literal["unknown_error"], Literal["no_such_run"], Literal["no_such_subscription"], Literal["no_such_namespace"], Literal["no_such_interrupt"], Literal["no_such_checkpoint"], Literal["permission_denied"], Literal["not_supported"]]
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class ResponseMeta(TypedDict):
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applied_through_seq: NotRequired[JsUint]
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RunCommand = RunStart
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class _CommandVariant0(_CommandFields, RunCommand):
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pass
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class RunStartParams(TypedDict):
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assistant_id: str # Deployed graph/agent to run
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input: Any # Graph input, resume value, or injected message
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config: NotRequired[dict[str, Any]] # Per-run config overrides
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metadata: NotRequired[dict[str, Any]] # Per-run metadata
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Channel = Union[Literal["values"], Literal["updates"], Literal["messages"], Literal["tools"], Literal["lifecycle"], Literal["input"], Literal["checkpoints"], Literal["tasks"], Literal["custom"], Annotated[str, "custom:.+"]]
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class EventStreamRequest(TypedDict):
|
||||
channels: list[Channel]
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||||
namespaces: NotRequired[list[Namespace]] # Prefix-match these namespace paths
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depth: NotRequired[int] # Max depth below namespace prefix
|
||||
since: NotRequired[JsUint] # Replay events after this seq number
|
||||
|
||||
class SubscribeParams(TypedDict):
|
||||
channels: list[Channel]
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||||
namespaces: NotRequired[list[Namespace]] # Prefix-match these namespace paths
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||||
depth: NotRequired[int] # Max depth below namespace prefix
|
||||
|
||||
class UnsubscribeParams(TypedDict):
|
||||
subscription_id: str
|
||||
|
||||
class ReconnectParams(TypedDict):
|
||||
run_id: str
|
||||
last_event_id: NotRequired[str] # Last event the client processed
|
||||
subscriptions: NotRequired[list[str]] # Subscription IDs to restore
|
||||
|
||||
class AgentStatusEntry(TypedDict):
|
||||
namespace: Namespace
|
||||
status: AgentStatus
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||||
|
||||
SubscriptionResult = Union[SubscribeResult, ReconnectResult, EmptyResult]
|
||||
|
||||
AgentCommand = AgentGetTree
|
||||
|
||||
CommandData = Union[RunCommand, SubscriptionCommand, AgentCommand, InputCommand, StateCommand]
|
||||
|
||||
class _CommandVariant4(_CommandFields, AgentCommand):
|
||||
pass
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||||
|
||||
Command = Union[_CommandVariant0, _CommandVariant1, _CommandVariant2, _CommandVariant3, _CommandVariant4, _CommandVariant5, _CommandVariant6, _CommandVariant7, _CommandVariant8, _CommandVariant9]
|
||||
|
||||
class AgentGetTreeParams(TypedDict):
|
||||
run_id: NotRequired[str]
|
||||
|
||||
class AgentTreeNode(TypedDict):
|
||||
namespace: Namespace
|
||||
status: AgentStatus
|
||||
graph_name: str
|
||||
children: NotRequired[list[AgentTreeNode]]
|
||||
metadata: NotRequired[dict[str, Any]]
|
||||
|
||||
AgentStatus = Union[Literal["started"], Literal["running"], Literal["completed"], Literal["failed"], Literal["interrupted"]]
|
||||
|
||||
class LifecycleCauseToolCall(TypedDict):
|
||||
type: Literal["toolCall"] # The `tool_call_id` from the originating `tool-started` event
|
||||
tool_call_id: str
|
||||
|
||||
class LifecycleCauseSend(TypedDict):
|
||||
type: Literal["send"] # Name of the parent node that issued the `Send`. Multiple Sends
|
||||
from_node: str
|
||||
|
||||
class LifecycleCauseEdge(TypedDict):
|
||||
type: Literal["edge"] # Name of the parent node the edge originated from.
|
||||
from_node: str
|
||||
|
||||
LifecycleCause = Union[LifecycleCauseToolCall, LifecycleCauseSend, LifecycleCauseEdge]
|
||||
|
||||
class LifecycleData(TypedDict):
|
||||
event: AgentStatus
|
||||
graph_name: NotRequired[str]
|
||||
cause: NotRequired[LifecycleCause] # Causation edge (see LifecycleCause)
|
||||
error: NotRequired[str]
|
||||
checkpoint: NotRequired[CheckpointRef] # Checkpoint reference for time-travel
|
||||
|
||||
class MessageStartData(TypedDict):
|
||||
event: Literal["message-start"]
|
||||
role: MessageRole # Author role for this message
|
||||
id: str # Unique ID for this message
|
||||
metadata: NotRequired[MessageMetadata] # Concise provider/model metadata for AI messages
|
||||
|
||||
class ContentBlockStartData(TypedDict):
|
||||
event: Literal["content-block-start"]
|
||||
index: int # Positional index within the message
|
||||
content: ContentBlock
|
||||
|
||||
class ContentBlockDeltaData(TypedDict):
|
||||
event: Literal["content-block-delta"]
|
||||
index: int
|
||||
delta: ContentBlockDelta
|
||||
|
||||
class ContentBlockFinishData(TypedDict):
|
||||
event: Literal["content-block-finish"]
|
||||
index: int
|
||||
content: FinalizedContentBlock
|
||||
|
||||
class MessageFinishData(TypedDict):
|
||||
event: Literal["message-finish"]
|
||||
usage: NotRequired[UsageInfo] # Token usage for AI-authored messages
|
||||
|
||||
class MessageErrorData(TypedDict):
|
||||
event: Literal["error"]
|
||||
message: str
|
||||
code: NotRequired[str]
|
||||
|
||||
MessagesData = Union[MessageStartData, ContentBlockStartData, ContentBlockDeltaData, ContentBlockFinishData, MessageFinishData, MessageErrorData]
|
||||
|
||||
class UsageInfo(TypedDict):
|
||||
input_tokens: NotRequired[int]
|
||||
output_tokens: NotRequired[int]
|
||||
total_tokens: NotRequired[int]
|
||||
|
||||
class ToolStartedData(TypedDict):
|
||||
event: Literal["tool-started"]
|
||||
tool_call_id: str
|
||||
tool_name: str
|
||||
input: NotRequired[Any] # Tool input arguments
|
||||
|
||||
class ToolOutputDeltaData(TypedDict):
|
||||
event: Literal["tool-output-delta"]
|
||||
tool_call_id: str
|
||||
delta: str
|
||||
|
||||
class ToolFinishedData(TypedDict):
|
||||
event: Literal["tool-finished"]
|
||||
tool_call_id: str
|
||||
output: Any
|
||||
|
||||
class ToolErrorData(TypedDict):
|
||||
event: Literal["tool-error"]
|
||||
tool_call_id: str
|
||||
message: str
|
||||
code: NotRequired[str]
|
||||
|
||||
ToolsData = Union[ToolStartedData, ToolOutputDeltaData, ToolFinishedData, ToolErrorData]
|
||||
|
||||
class InputRespondParams(TypedDict):
|
||||
namespace: Namespace
|
||||
interrupt_id: str
|
||||
response: Any
|
||||
|
||||
class InputInjectParams(TypedDict):
|
||||
namespace: Namespace
|
||||
message: InputMessage
|
||||
|
||||
class InputMessage(TypedDict):
|
||||
role: Union[Literal["user"], Literal["system"]]
|
||||
content: str
|
||||
name: NotRequired[str]
|
||||
|
||||
InputResult = EmptyResult
|
||||
|
||||
class InputRequestedData(TypedDict):
|
||||
interrupt_id: str # Correlates this request with input.respond
|
||||
payload: Any # Opaque interrupt value from runtime; application-defined shape
|
||||
|
||||
class StateGetParams(TypedDict):
|
||||
namespace: Namespace
|
||||
keys: NotRequired[list[str]] # Specific state keys, or omit for all
|
||||
|
||||
class ListCheckpointsParams(TypedDict):
|
||||
namespace: NotRequired[Namespace]
|
||||
limit: NotRequired[int]
|
||||
before: NotRequired[str] # Cursor for pagination
|
||||
|
||||
class CheckpointSummary(TypedDict):
|
||||
id: str
|
||||
timestamp: str # ISO 8601
|
||||
step: int
|
||||
node_name: NotRequired[str] # Node that produced this checkpoint
|
||||
metadata: NotRequired[dict[str, Any]]
|
||||
|
||||
class CheckpointRef(TypedDict):
|
||||
id: str
|
||||
ns: NotRequired[str]
|
||||
|
||||
class StateForkParams(TypedDict):
|
||||
checkpoint_id: str
|
||||
input: NotRequired[Any] # Input for the forked run
|
||||
config: NotRequired[dict[str, Any]] # Config overrides
|
||||
|
||||
StateResult = Union[StateGetResult, ListCheckpointsResult, StateForkResult, EmptyResult]
|
||||
|
||||
ResultData = Union[RunResult, SubscriptionResult, AgentResult, InputResult, StateResult, EmptyResult]
|
||||
|
||||
class Checkpoint(TypedDict):
|
||||
id: str # Fork target: pass to state.fork / configurable.checkpoint_id
|
||||
parent_id: NotRequired[str] # Parent checkpoint id for tree linkage
|
||||
step: int # Superstep number (-1 for first input, 0 for first loop step, ...)
|
||||
source: CheckpointSource # Origin of the checkpoint
|
||||
|
||||
CheckpointSource = Union[Literal["input"], Literal["loop"], Literal["update"], Literal["fork"]]
|
||||
|
||||
class UpdatesData(TypedDict):
|
||||
node: NotRequired[str] # Graph node that produced this update
|
||||
values: dict[str, Any] # State delta
|
||||
|
||||
class CustomData(TypedDict):
|
||||
name: NotRequired[str] # Custom event name for dispatch
|
||||
payload: Any # User-defined payload
|
||||
|
||||
Reference in New Issue
Block a user