Saurik issued a rare official update for Cydia Substrate on Sunday, officially bringing the native tweak injection method for the checkra1n and unc0ver jailbreaks up to version 0.9.7100.
Although Saurik hasn’t made any official announcements on Twitter about the update, checkra1n and unc0ver co-developer Sam Bingner made a post on /r/jailbreak describing this new Cydia Substrate update.