/**
 * Eval stimulus resolution — resolves a raw (YAML-parsed) stimulus into
 * a fully resolved `Stimulus` by replacing string environment refs with
 * concrete `EnvironmentConfig` objects and merging with the root environment.
 */
import type { RawStimulus, EnvironmentConfig, GradingEnvironmentConfig, Stimulus } from "./types.js";
/**
 * Resolve a single `RawStimulus` into a `Stimulus` by resolving its
 * environment string ref (if any) and merging with the provided root
 * environment.  Eval-level tags are merged onto each stimulus using
 * child-wins semantics (stimulus tags override eval tags on the same key).
 */
export declare function resolveStimulus(raw: RawStimulus, rootEnv: EnvironmentConfig | undefined, environments: Record<string, EnvironmentConfig>, evalTags?: Record<string, string | string[]>, baseDir?: string, rootGradingEnv?: GradingEnvironmentConfig): Stimulus;
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