Ruleset 42
You can now sign in without a password. Ask for a sign-in link and one arrives by email: it works once, expires after thirty minutes, and replaces any earlier link you had asked for. Opened in a different browser from the one that asked, it checks with you first rather than signing you in. Nothing about how the game is played has changed: no fixture has moved, no format has changed and no result has been recomputed. The limits on how many links one address may ask for are settings now rather than numbers in the code, and they are the ones that were always intended. Links that arrive inside a notification are a later change: for now a link signs you in and takes you to your worlds.