Enum StreamMode 

#[non_exhaustive]
pub enum StreamMode {
    Values,
    Updates,
    Messages,
    Debug,
    Events,
}

Which stream shape the caller wants.

Matches LangGraph’s stream_mode. Values and Updates are the most common; Messages is for token-level UX; Debug and Events are for observability.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Values

Emit the full output state after each step.

Updates

Emit only what changed at each step, tagged with the node name.

Messages

Emit token-level deltas from any underlying chat model.

Debug

Emit lifecycle markers (node start / node end / final).

Events

Emit runtime events (runnable started / runnable finished).

Trait Implementations

impl Clone for StreamMode

fn clone(&self) -> StreamMode

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StreamMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for StreamMode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for StreamMode

fn eq(&self, other: &StreamMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for StreamMode

impl Eq for StreamMode

impl StructuralPartialEq for StreamMode