import type { FixtureDefinition, RegisteredFixture } from './types.js';
/**
 * Stores fixture definitions keyed by model name.
 * Fixtures can be retrieved in dependency-sorted order for safe loading.
 */
export declare class FixtureRegistry {
    private readonly fixtures;
    /** Validate and store a fixture definition. */
    register(definition: FixtureDefinition): void;
    getForModel(model: string): RegisteredFixture[];
    getAll(): RegisteredFixture[];
    getAllModels(): string[];
    /** Return all definitions sorted so dependencies load first. */
    getLoadOrder(): FixtureDefinition[];
    /**
     * Get fixtures for a specific variant. Variant fixtures override base (no-variant)
     * fixtures on a per-model basis. Results are dependency-sorted.
     */
    getForVariant(variant: string | undefined): FixtureDefinition[];
    /**
     * Sort definitions so that each fixture's dependencies appear before it.
     * Uses depth-first traversal with visited tracking.
     */
    private topologicalSort;
    private validate;
}
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