ChatHistoryTruncationReducer Class

A ChatHistory that supports truncation logic.

Because this class inherits from ChatHistoryReducer (which in turn inherits from ChatHistory), it can also be used anywhere a ChatHistory is expected, while adding truncation capability.

Args: target_count: The target message count. threshold_count: The threshold count to avoid orphaning messages. auto_reduce: Whether to automatically reduce the chat history, default is False.

Note: This class is marked as 'experimental' and may change in the future.

Create a new model by parsing and validating input data from keyword arguments.

Raises [ValidationError][pydantic_core.ValidationError] if the input data cannot be validated to form a valid model.

self is explicitly positional-only to allow self as a field name.

Constructor

ChatHistoryTruncationReducer(*, messages: list[ChatMessageContent] = None, system_message: str | None = None, target_count: Annotated[int, Gt(gt=0)], threshold_count: Annotated[int, Ge(ge=0)] = 0, auto_reduce: bool = False)

Keyword-Only Parameters

Name	Description
messages Required
system_message Required
target_count Required
threshold_count Required
auto_reduce Required

Methods

reduce

reduce

async reduce() -> Self | None

Attributes

auto_reduce

auto_reduce: bool

is_experimental

is_experimental = True

messages

messages: list[ChatMessageContent]

stage_status

stage_status = 'experimental'

system_message

system_message: str | None

target_count

target_count: int

threshold_count

threshold_count: int