c88c.org

File	Role
CNAME	the custom domain (mirrors the repo's Pages settings)
index.html	c88c.org → client-side redirect to the current semester
404.html	any unknown path: assignment links (/hw/...) redirect into the current semester; anything else shows a 404. Past semesters are served directly at c88c.org/<sem>/ by their own repos, so they never reach this file

Each semester

Update the semester in index.html (two places) and CURRENT in 404.html. A new semester repo named <sem> is served at c88c.org/<sem>/ automatically, but check Enforce HTTPS in its Pages settings — the setting is per repo, and without it http://c88c.org/<sem>/... serves plain HTTP instead of redirecting to https.