Struct Step 

pub struct Step {

    pub step_id: u64,
    pub timestamp: Option<String>,
    pub source: Source,
    pub message: Value,
    pub reasoning_effort: Option<ReasoningEffort>,
    pub reasoning_content: Option<String>,
    pub model_name: Option<String>,
    pub tool_calls: Option<Vec<ToolCall>>,
    pub observation: Option<Observation>,
    pub metrics: Option<Metrics>,
    pub is_copied_context: Option<bool>,
    pub llm_call_count: Option<u64>,
    pub extra: Option<Value>,
}

One interaction step.

Fields

step_id: u64

Sequential id starting at 1.

timestamp: Option<String>

ISO-8601 timestamp.

source: Source

Who produced the step.

message: Value

Message content (string or content-part array since v1.6).

reasoning_effort: Option<ReasoningEffort>

Agent-only: qualitative or quantitative reasoning effort.

reasoning_content: Option<String>

Agent-only: chain-of-thought / reasoning content.

model_name: Option<String>

Agent-only: model that produced this step.

tool_calls: Option<Vec<ToolCall>>

Agent-only: tool calls issued in this step.

observation: Option<Observation>

Environment feedback (agent steps; system steps since v1.2).

metrics: Option<Metrics>

Agent-only: per-step LLM metrics.

is_copied_context: Option<bool>

True when copied from a previous trajectory as context.

llm_call_count: Option<u64>

Number of LLM calls in this step (v1.7; valid on any step source).

extra: Option<Value>

Custom metadata.

Trait Implementations

impl Clone for Step

fn clone(&self) -> Step

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Step

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Step

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Step

fn eq(&self, other: &Step) -> 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 Serialize for Step

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Step