Struct AgentStep 

pub struct AgentStep {
    pub id: Uuid,
    pub timestamp: DateTime<Utc>,
    pub reasoning: Option<ReasoningBlock>,
    pub message: Option<MessageBlock>,
    pub tools: Vec<ToolExecution>,
    pub usage: Option<ContextWindowUsage>,
    pub is_failed: bool,
    pub status: StepStatus,
}

Single LLM inference cycle with optional tool executions.

A step represents one round of agent thinking and acting:

1. Generation phase: LLM produces reasoning, messages, and tool calls
2. Execution phase: Tools are executed and results collected

Steps are the atomic unit of agent behavior analysis.

Fields

id: Uuid

Unique step identifier (ID of the first event in this step).

timestamp: DateTime<Utc>

When the step started.

reasoning: Option<ReasoningBlock>

Chain-of-thought reasoning, if present.

message: Option<MessageBlock>

Text response to user or explanation of tool usage.

tools: Vec<ToolExecution>

Tool executions (call + result pairs) performed in this step. Calls are generated in Phase 1, paired with results here.

usage: Option<ContextWindowUsage>

Token usage for this step’s LLM inference, if available.

is_failed: bool

Whether this step encountered any failures.

status: StepStatus

Current completion status of this step.

Trait Implementations

impl Clone for AgentStep

fn clone(&self) -> AgentStep

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AgentStep

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AgentStep

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for AgentStep

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

where __S: Serializer,

Serialize this value into the given Serde serializer.