export interface ArtifactPaths {
    slug: string;
    mdPath: string;
    jsonPath: string;
}
/**
 * Resolve a collision-free slug + its `.md`/`.json` paths under
 * `artifactDir`. The base slug wins when free; otherwise `-2`, `-3`, …
 * until neither the `.md` nor the `.json` exists. Bounded so a
 * pathological directory can't loop forever — after 998 collisions it
 * falls back to a high-resolution millisecond suffix rather than clobber.
 */
export declare function resolveUniqueArtifactPaths(artifactDir: string, baseSlug: string): Promise<ArtifactPaths>;
/**
 * Write the artifact pair atomically, `.json` LAST as the commit marker.
 * Callers pass FINAL paths (already de-collided via
 * resolveUniqueArtifactPaths). Throws on any filesystem failure — the pack
 * handlers catch it and record the artifact as not-written.
 */
export declare function writeArtifactPair(artifactDir: string, mdPath: string, markdown: string, jsonPath: string, jsonPayload: string): Promise<void>;
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