Working on an embedded device that requires building firmware images, etc, I've taken to using docker containers with a COW overlay. I have a vibe-coded tool wh

Working on an embedded device that requires building firmware images, etc, I've taken to using docker containers with a COW overlay. I have a vibe-coded tool which checks out the latest and does a clean compile, creating a base directory. Then I spawn a build container on top of that. Every build is warm, as they share ccache and page cache. Huge speed up for parallel builds and I never OOM. Every build also sees the same directory structure, simplifying instructions, etc for the agents.