Struct Capture 

#[non_exhaustive]
pub struct Capture {
    pub run_id: RunId,
    pub run_log: RunLog,
    pub llm_io: Vec<LlmIo>,
    pub model_version: Option<String>,
    pub rng_seed: Option<u64>,
    pub memory_ref: Option<String>,
    pub captured_at: DateTime<Utc>,
}

A self-contained snapshot of one run’s replayable execution context. The model_version, rng_seed, and memory_ref fields are Option so a capture assembled before a provider records them deserializes unchanged once they are present — older captures simply carry null.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

run_id: RunId

Equal to run_log.run_id; the key under which a persisted capture is looked up.

run_log: RunLog

The recorded step sequence replay walks; its outputs are what a DivergenceReport compares against.

llm_io: Vec<LlmIo>

Prompt/completion text the RunLog itself does not carry, ordered parallel to the run_log’s LlmCall steps.

model_version: Option<String>

Model that served the last LLM call in this run. In heterogeneous-model runs this captures the most-recent model only. None for captures assembled before model tracking was added (older captures carry null).

rng_seed: Option<u64>

Seed that made the run’s LLM deterministic, when one was set — the signal that replay can expect byte-identical output rather than drift.

memory_ref: Option<String>

Opaque handle to a memory snapshot; None when no snapshot was taken.

captured_at: DateTime<Utc>

Capture-assembly time, distinct from the run’s own started_at/finished_at.

Implementations

impl Capture

pub fn from_runlog(run_log: RunLog, llm_io: Vec<LlmIo>) -> Self

Stamps captured_at from the wall clock at call time — it is the capture moment, not derived from the run’s own started_at/finished_at.

model_version is derived from the last LlmIo entry that carries a model name; None when no entry recorded one.

Trait Implementations

impl Clone for Capture

fn clone(&self) -> Capture

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Capture

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Capture

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Capture

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

where __S: Serializer,

Serialize this value into the given Serde serializer.