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//! Evaluation scopes, subjects, and expected outcomes.
use serde::{Deserialize, Serialize};
use agent_sdk_core::{EntityRef, RunId, SessionId, TurnId};
#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
#[serde(tag = "scope", rename_all = "snake_case")]
/// The durable boundary an evaluation is about.
pub enum EvaluationScope {
/// Evaluate one run.
Run {
/// Run identifier used for lineage, filtering, replay, and dedupe.
run_id: RunId,
},
/// Evaluate one turn, optionally grouped by session.
Turn {
/// Optional host-provided session identifier for grouping related turns.
session_id: Option<SessionId>,
/// Turn identifier for one loop turn within a run.
turn_id: TurnId,
},
/// Evaluate one session timeline.
Session {
/// Session identifier for grouping related turns.
session_id: SessionId,
},
/// Evaluate a host-defined scope represented by an entity ref.
Custom {
/// Scope ref owned by the host or optional integration layer.
scope_ref: EntityRef,
},
}
#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
#[serde(rename_all = "snake_case")]
/// Role a subject plays in an evaluation.
pub enum EvaluationSubjectRole {
/// Main thing being evaluated.
Primary,
/// Candidate evidence that may have helped the outcome.
CandidateEvidence,
/// Baseline subject used for comparison.
Baseline,
/// Comparator subject used in paired or ablation evals.
Comparator,
/// Constraint that shaped the expected result.
Constraint,
}
#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
/// One entity being evaluated or compared.
pub struct EvaluationSubject {
/// Entity ref for the subject.
pub subject_ref: EntityRef,
/// Subject role in this evaluation.
pub role: EvaluationSubjectRole,
/// Bounded summary safe for logs, journals, events, and telemetry.
pub redacted_summary: Option<String>,
}
impl EvaluationSubject {
/// Creates a primary evaluation subject.
pub fn primary(subject_ref: EntityRef) -> Self {
Self {
subject_ref,
role: EvaluationSubjectRole::Primary,
redacted_summary: None,
}
}
/// Returns this subject with a safe summary attached.
pub fn with_redacted_summary(mut self, redacted_summary: impl Into<String>) -> Self {
self.redacted_summary = Some(redacted_summary.into());
self
}
}
#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
/// One expected-outcome criterion.
pub struct EvaluationCriterion {
/// Stable criterion id owned by the host or eval fixture.
pub criterion_id: String,
/// Bounded summary of the condition to check.
pub redacted_summary: String,
/// Optional weight encoded as a string so the SDK stays metric-neutral.
pub weight: Option<String>,
}
impl EvaluationCriterion {
/// Creates a criterion from a stable id and safe summary.
pub fn new(criterion_id: impl Into<String>, redacted_summary: impl Into<String>) -> Self {
Self {
criterion_id: criterion_id.into(),
redacted_summary: redacted_summary.into(),
weight: None,
}
}
/// Returns this criterion with a host-defined weight attached.
pub fn with_weight(mut self, weight: impl Into<String>) -> Self {
self.weight = Some(weight.into());
self
}
}
#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
/// Expected result supplied by a test, host, human reviewer, or eval fixture.
pub struct ExpectedOutcome {
/// Optional outcome entity being checked.
pub outcome_ref: Option<EntityRef>,
/// Criteria the evaluator should judge.
pub criteria: Vec<EvaluationCriterion>,
/// Bounded summary safe for provider prompts and test output.
pub redacted_summary: String,
}
impl ExpectedOutcome {
/// Creates an expected outcome from a safe summary.
pub fn new(redacted_summary: impl Into<String>) -> Self {
Self {
outcome_ref: None,
criteria: Vec::new(),
redacted_summary: redacted_summary.into(),
}
}
/// Creates a common completion expectation.
pub fn completed() -> Self {
Self::new("agent completed the requested task").with_criterion(EvaluationCriterion::new(
"criterion.completed",
"run completed",
))
}
/// Returns this expected outcome with an outcome ref attached.
pub fn with_outcome_ref(mut self, outcome_ref: EntityRef) -> Self {
self.outcome_ref = Some(outcome_ref);
self
}
/// Returns this expected outcome with one criterion appended.
pub fn with_criterion(mut self, criterion: EvaluationCriterion) -> Self {
self.criteria.push(criterion);
self
}
}