/** Clears the cached directory-entry lookups. Exported for test isolation. */
export declare function clearJsDirectoryIndexCache(): void;
/**
 * Resolve `specifier` (already relative-resolved to a workspace-relative-ish
 * path by `resolveRelativeImport`) to `<specifier>/index` when it names a
 * real on-disk directory with a recognized `index.<ext>` entry file, using
 * `workspaceRoot` to build the absolute path for the filesystem check.
 *
 * No-op (`specifier` unchanged) when:
 * - `workspaceRoot` is undefined.
 * - `<workspaceRoot>/<specifier>` isn't a directory at all — the common
 *   case: an ordinary file-shaped relative import, already correctly matched
 *   without this step.
 * - It IS a directory but has no recognized `index.<ext>` file (a directory
 *   of loose files with no barrel) — left unresolved rather than guessed;
 *   `dependency-analyzer.ts`'s per-chunk Python-strategy guard is the
 *   residual defense for this case.
 *
 * @param specifier - The already relative-resolved specifier.
 * @param workspaceRoot - Absolute path to the project root (for the existence check).
 */
export declare function resolveJsDirectoryIndex(specifier: string, workspaceRoot: string | undefined): string;
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