Three guides, one for each role, all following the system-design interview scenarios from first sign-in to a graded session.
Sign in, set your keys, ask the interviewer the right questions, write DESIGN.md in the browser, submit, and defend it.
Create sessions one at a time or for a whole cohort, send links, watch replays, grade with extra credit, export.
Environment variables, the first admin, users and cohorts, scenario curation, keys and rate limits, emails.