architecture

takeUforward DSA sheet reader. No contests, no rating, no /topics extra route. Topics live inside /stats. Contests/rating/badges routes still await fetch_dsa_progress(username) so a missing user 404s, then return empty models so CodeTrace’s six-way loop does not special-case the platform.

App is app:app. No __main__. Local port 8007.

TUF is the sibling that also speaks Upstash REST (UPSTASH_REDIS_REST_URL + token) besides REDIS_URL / TUF_REDIS_URL. Invalid-user marker adds "username not found". Full Redis walk is on Request path.

flowchart LR
  Browser --> API["tuf-stats.tashif.codes"]
  API --> GO["backend-go.takeuforward.org/api"]

Older shared-profile URL 404s. The frontend uses DSA progress. This API does the same.