Captain Bob, 2026-11-07: "I also want that rebuilds block other jobs always." acceptance, nightly and release shared the group qemu; now runner-image, build and nightly-docs do too, so a rebuild of the runner image (on the host's Docker daemon) never overlaps another job, whatever the runner's capacity (#121). On this server every CI run is then one at a time. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2