The retry that pays twice
A charge endpoint retried by the client. Two charges appear on the customer's card.
Whether they choose the right idempotency key (request-scoped) and reject duplicates server-side.
- · a real Linux box in the browser
- · kubectl, docker, terraform, jq, yq
- · cluster, repo and cloud creds pre-wired
- · auto-checks running in the background
- · every keystroke + every command
- · terminal + screen recording
- · auto-graded pass/fail per check
