It looks like that Cydia creator Saurik (aka Jay Freeman) is making progress on his work to fix the 7-day certification signing issue of Luca Todesco's Yalu iOS 10.2 jailbreak. The dev just released a tool called Cydia Extender that is designed to make the JB solution more convenient to use.
As promised, Saurik came up with Cydia Extender, which according to iDownloadBlog.com was unpacked with Cydia Impactor v. 0.9.39. The original plan was for the tool to do away with the Yalu jailbreak's 7-day re-signing requirements but as noted in the same report, Cydia Extender is a bit incomplete at the moment.
For one, it will only be available to users with a paid developer account and Saurik himself has admitted that Cydia Extender requires a "crazy indirect technique ... for the install process (a loopback VPN network extension)." The VPN feature is admittedly an inconvenient element and could be ditched soon, the dev told iDB.
Saurik also made clear that Cydia Extender is far from the 7-day signing fix that he remains working on but as noted by the same report the tool can certainly do wonders like allowing developers "to browse, install and re-sign applications indefinitely," minus the need to hook up on a computer. Incomplete as it is, Cydia Extender now works on Mac, PC and Linux.
At best, the tool serves as a workaround for now on the Yalu jailbreak signing problem but the final solution remains in the works. The possible next scenarios would be Saurik will eventually update Cydia Extender and make it accessible to the public or he could opt to release a more powerful solution.
The latter is likely to be the product of Saurik's rumored collaboration with an unnamed developer, which Todesco himself has hinted. So the prospect remains that the Yalu signing woes will be resolved soon and possibly the finalization of the same jailbreak solution.
As committed by Todesco in recent weeks, the Yalu iOS 10.2 jailbreak will reach its finalized version soon, which could mean that the JB tool will not only fix the 7-day signing glitch but also graduate into an untethered jailbreak solution. But when exactly the finalized jailbreak release is happening remains a big mystery.