New chapter: Things You Do Not Control. Four levels about services you depend on but cannot scale: rate limits, slow providers, retries that spend your quota twice, and a dinner rush that tests it all.<br>Postmortems now name the real problem and the first thing to try.<br>Closer to the User is more forgiving: a CDN at default settings passes.<br>Finished the campaign? Play points you at levels sh
Only the current version so far — new entries appear as the game ships updates.
Cloud architecture simulator: design real systems, deploy, and watch them break.
