Struct ExecutionTrace 

pub struct ExecutionTrace {
    pub inputs: Example,
    pub outputs: Option<Prediction>,
    pub feedback: Option<FeedbackMetric>,
    pub intermediate_steps: Vec<(String, Value)>,
    pub errors: Vec<String>,
    pub metadata: HashMap<String, Value>,
}

Execution trace capturing program behavior

Captures the full execution path of a module, including intermediate steps, errors, and environmental feedback.

Fields

inputs: Example

Input example

outputs: Option<Prediction>

Final prediction (if successful)

feedback: Option<FeedbackMetric>

Evaluation feedback

intermediate_steps: Vec<(String, Value)>

Intermediate steps in the execution

Each entry is (step_name, step_output)

errors: Vec<String>

Errors encountered during execution

metadata: HashMap<String, Value>

Execution metadata (timing, cost, etc.)

Implementations

impl ExecutionTrace

pub fn simple(inputs: Example, outputs: Prediction) -> Self

Create a simple trace with just inputs and outputs

pub fn builder(inputs: Example) -> ExecutionTraceBuilder

Create a new trace builder

pub fn with_feedback(self, feedback: FeedbackMetric) -> Self

Add feedback to the trace

pub fn is_successful(&self) -> bool

Check if execution was successful

pub fn score(&self) -> Option<f32>

Get score if available

pub fn format_for_reflection(&self) -> String

Format trace for LLM reflection

Trait Implementations

impl Clone for ExecutionTrace

fn clone(&self) -> ExecutionTrace

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExecutionTrace

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ExecutionTrace

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ExecutionTrace

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

where __S: Serializer,

Serialize this value into the given Serde serializer.