Module state 

Modules

channel

Channel trait and channel types for state field access with checkpoint support

messages

trait_

Structs

AnyValueReducer

AnyValue reducer: assumes all values are equal

AppendReducer

Append reducer: accumulate all writes

CowState

Copy-on-write state wrapper (default state wrapper)

DeltaChannel

Delta channel: append-heavy optimization with periodic snapshots

EphemeralChannel

Ephemeral channel: value is cleared at the start of each superstep

FieldVersions

Per-field version numbers for state change tracking.

FieldsChanged

Bitmask tracking which fields changed

ImageData

Image data for multimodal content

LastValueAfterFinishChannel

Last-value-after-finish channel: value only available after finish() is called

LastWriteWinsReducer

LastWriteWins reducer: allows multiple writers, last one wins

Message

Message type for LLM conversations.

MessagesState

Built-in state for simple chat agents

MessagesStateUpdate

Update type for MessagesState

NamedBarrierChannel

Named barrier channel: waits for all registered named sources to write

Overwrite

Bypass reducer: overwrite value directly, bypassing normal merge

RemoveMessage

Remove-message identifier for message deletion

ReplaceReducer

Replace reducer: only one writer per superstep (default)

RingBufferChannel

Ring buffer channel for append-heavy fields with bounded size

TokenUsage

Token usage information from LLM API responses

ToolCall

Tool call within a message

TopicChannel

Topic channel: accumulates all published values into a list

UntrackedChannel

Untracked channel: value is not persisted across checkpoints

Enums

Content

Message content

ContentPart

Content part for multimodal messages

DeltaBlob

Delta blob for representing checkpoint state

ImageSource

Image source for multimodal content

Role

Message role

Constants

REMOVE_ALL_MESSAGES

Special sentinel: remove all messages

Traits

Channel

Channel trait for state field access with checkpoint support

FromState

Trait for extracting output schema from full State

IntoState

Trait for converting input schema into full State

Reducer

Reducer trait defining merge semantics for state fields

State

State trait for graph state management

Functions

messages_reducer

Messages reducer with append+merge+delete semantics