platform notes

Deprecated alias:

GET /{username}/solved-problems

That path now returns the canonical stats envelope. OpenAPI marks it deprecated.

GFG does not have contests in the Codeforces sense. /{username}/contests and /{username}/rating exist so CodeTrace can loop the same paths. Expect empty history / null rating rather than a 404.

Difficulty keys school and basic are real here. LeetCode leaves them at 0.

CORS *. Optional Redis via REDIS_URL.