Struct Step 

pub struct Step {
    pub idx: usize,
    pub kind: StepKind,
    pub name: String,
    pub inputs: Option<Payload>,
    pub outputs: Option<Payload>,
    pub attrs: Map<String, Value>,
    pub t_start: Option<String>,
    pub t_end: Option<String>,
    pub parent_idx: Option<usize>,
}

One node in a trajectory.

Minimal valid step: idx, kind, name, and at least one of inputs/outputs. All other fields are optional and omitted from serialization when empty, so re-emitted traces stay compact without losing information.

Fields

idx: usize

0-based position in the trajectory.

kind: StepKind

Structural class of the step.

name: String

Agent or tool name — part of the structural identity the aligner keys on.

inputs: Option<Payload>

Step input, if captured.

outputs: Option<Payload>

Step output, if captured.

attrs: Map<String, Value>

Anything else worth keeping (model, tokens, cost, …).

t_start: Option<String>

RFC3339 start time. Display-only — never an alignment signal.

t_end: Option<String>

RFC3339 end time. Display-only — never an alignment signal.

parent_idx: Option<usize>

Caller step index; absent/null on every step means a linear chain.

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

Equality operator ==.

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

Inequality operator !=.

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