Cartethyiaaa/android_kernel_common-6.12 — reverse-engineered prompt

I want this Android common kernel repo set up so I can actually build it without having to guess my way through it.

Please make the tree build cleanly with the included build script and existing configs, especially for the common Android kernel targets like arm64 and x86_64 if they’re supported here. If there are obvious repo issues, broken defaults, or missing bits that stop a normal build, fix them in place instead of only pointing them out. Then add a simple beginner friendly guide that explains how to do a clean build, what commands to run, what the main config choices mean, and where the build output ends up.

Since the README is mostly about patch submission, also make the contribution flow easier to follow. I want a short practical note on how to prepare a patch correctly for this repo, including the subject tags, Change Id, Bug, and Signed off by lines, plus any basic checks I should run before sending it. Look up current Android kernel build docs online if you need to.