Enum ModelDelta 

#[non_exhaustive]
pub enum ModelDelta {
    Text(String),
    ToolCallStart {
        id: String,
        name: String,
    },
    ToolCallArgs {
        id: String,
        partial_json: String,
    },
    ToolCallEnd {
        id: String,
    },
    Usage(Usage),
    Stop(StopReason),
    Reasoning(String),
}

Streaming delta — incremental output from the model.

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.

Text(String)

ToolCallStart

Fields

id: String

name: String

ToolCallArgs

Fields

id: String

partial_json: String

ToolCallEnd

Fields

id: String

Usage(Usage)

Stop(StopReason)

Reasoning(String)

Provider-specific reasoning trace that must round-trip on the next request. DeepSeek thinking content, Anthropic thinking blocks, and Gemini raw parts (with thoughtSignatures) all flow through this — the AgentLoop folds them into the final ModelOutput.reasoning without surfacing them to user-visible token streams.

Trait Implementations

impl Clone for ModelDelta

fn clone(&self) -> ModelDelta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ModelDelta

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ModelDelta

fn deserialize<__D>( __deserializer: __D, ) -> Result<ModelDelta, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ModelDelta

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.