Struct StepOutput 

pub struct StepOutput {
    pub output: Value,
    pub duration_ms: u64,
    pub cost_usd: Decimal,
    pub input_tokens: Option<u64>,
    pub output_tokens: Option<u64>,
    pub model: Option<String>,
    pub debug_messages: Option<Vec<DebugMessage>>,
}

Result of executing a single step.

Fields

output: Value

Serialized output (stdout for shell, body for http, value for agent).

For agent steps with a JSON schema, the value may not strictly conform to the schema: Claude CLI can flatten wrapper objects with a single array field, returning a bare array instead of {"items": [...]}. Callers should handle both the expected wrapper and a bare value.

duration_ms: u64

Wall-clock duration in milliseconds.

cost_usd: Decimal

Cost in USD (agent steps only).

input_tokens: Option<u64>

Input token count (agent steps only).

output_tokens: Option<u64>

Output token count (agent steps only).

model: Option<String>

Model identifier used for agent steps (e.g. "claude-sonnet-4-20250514").

debug_messages: Option<Vec<DebugMessage>>

Conversation trace from verbose agent invocations.

Implementations

impl StepOutput

pub fn debug_messages_json(&self) -> Option<Value>

Serialize debug messages to a JSON Value for store persistence.

Returns None when verbose mode was off (no messages captured).

Trait Implementations

impl Clone for StepOutput

fn clone(&self) -> StepOutput

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StepOutput

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

Formats the value using the given formatter.