feat(import): code-repo job

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/feature-import/src/jobs/code-repo.ts

@@ -27,7 +27,7 @@ function moduleNumber(m: { id: string; title: string }, index: number): number {
   return folderNumber(m.title) ?? index + 1;
 }
 
-/** One level of single-directory wrappers ("Repo-main/Repo-main/…") is skipped. */
+/** Single-directory wrappers ("Repo-main/…") of a zip are skipped. */
 async function effectiveRoot(dir: string): Promise<string> {
   for (let i = 0; i < 3; i++) {
     const entries = (await readdir(dir, { withFileTypes: true })).filter((e) => !e.name.startsWith(".") && e.name !== "__MACOSX");
@@ -62,11 +62,10 @@ export async function importCodeRepo(d: Deps, payload: unknown, jc: JobContext):
       await jc.reportProgress(0.05, "Unpacking the repository zip");
       const src = await openSource(path);
       await src.extract(src.entries.filter((e) => !e.startsWith("__MACOSX/")), join(stage, "repo"), jc.signal);
-      root = join(stage, "repo");
+      root = await effectiveRoot(join(stage, "repo")); // GitHub-style zips wrap everything in one folder
     } else {
       root = path; // an extracted folder is only read
     }
-    root = await effectiveRoot(root);
 
     const modules: any[] = course.manifest.modules ?? [];
     const folders = (await readdir(root, { withFileTypes: true })).filter((e) => e.isDirectory() && !SKIP_DIRS.has(e.name) && !e.name.startsWith(".")).map((e) => e.name).sort();