Struct EpisodeSummary 

pub struct EpisodeSummary {
    pub episode_index: i64,
    pub env_index: i32,
    pub seed: Option<i64>,
    pub trial_index: Option<u64>,
    pub step_count: i64,
    pub cumulative_reward: f64,
    pub terminated: bool,
    pub truncated: bool,
    pub duration_ms: i64,
    pub success: Option<bool>,
    pub predict_ms: Option<f64>,
    pub step_ms: Option<f64>,
}

One completed episode’s summary, recorded in completion order across all lanes. The pull counterpart of the episode_completed hook event, so a caller without hooks (e.g. the in-process run_local loop) still gets per-episode results on the report.

Fields

episode_index: i64

1-based slot ordinal within the session, in completion order.

env_index: i32

The vector lane the episode ran on (0 for a single env).

seed: Option<i64>

The explicit seed this episode was reset with (episode_seeds / base_seed derivation), None for an unseeded or autoreset-rolled one.

trial_index: Option<u64>

The trial ordinal this episode walked (trial_index_base + its episode-start position). Minted for every driver-owned reset whether or not the env declared the reset option, so a coverage audit can read the sweep off the report either way; None only under NEXT_STEP autoreset, where the env restarts its own lanes and no ordinal is minted.

step_count: i64

cumulative_reward: f64

terminated: bool

truncated: bool

duration_ms: i64

success: Option<bool>

Env-reported task outcome from the final step’s info (Gymnasium’s is_success / success, or task_success); None when the env emits no such signal.

predict_ms: Option<f64>

Per-step means over the episode of the predict and env-step wall time, in milliseconds (the same accounting as the step_completed hook event); None for an episode that completed before its first step.

step_ms: Option<f64>

Trait Implementations

impl Clone for EpisodeSummary

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EpisodeSummary

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

Formats the value using the given formatter.

impl PartialEq for EpisodeSummary

fn eq(&self, other: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for EpisodeSummary