NightwindDev/oldabi-c — reverse-engineered prompt

Build me a small jailbreak compatibility package for iOS 15 and newer that lets older tweaks built for the legacy arm64e ABI keep working on devices where Apple removed that ABI. I want this to be a C based reimplementation of the old OldABI idea, basically a shim that patches in the compatibility behavior at runtime so legacy tweaks can still load.

Please make it easy to build and package for both rootful and rootless setups, and produce installable deb packages for each. If there are any device specific differences, handle them cleanly and detect what is needed at runtime where possible. Keep the project simple and practical, with a normal make based build flow and the usual jailbreak package metadata so it can be installed like a standard tweak package.

Add a short README that explains what it does, who it is for, and how to build and install it. You can look up current Theos and jailbreak packaging docs online if you need to.