During some investigation into building simple host images for KVM with Weston, I discovered that as things stand at the moment agl-image-weston is not particularly usable because:

• it does not stably end up containing weston; building with the "agl-demo" feature results in agl-compositor with the app framework user session startup being used instead.
• there are some permission issues around /dev/dri nodes when building without "agl-demo", as weston is run as the weston user now with Yocto's default weston-init behavior

This issue will be used to track fixes for the above.