Ilia Denisov
edc9709bd6
After a host reboot macOS clears /private/tmp, so the per-game bind-mount source under /tmp/galaxy-game-state/<uuid> vanishes and Docker refuses to restart the long-lived engine container under `restart: unless-stopped`. The container then sits in `exited` state and the dev sandbox is unreachable until the developer manually rms it and runs `make up` twice. Fix `make -C tools/local-dev up` to heal this in one cycle: 1. `prune-broken-engines` (new make target wired into `up`) walks every container labelled `galaxy-game-engine` and removes the ones not in `running` / `restarting` state. Healthy long-lived containers survive normal up/down cycles untouched. 2. The backend now runs a single reconciliation pass before the dev-sandbox bootstrap (`Reconciler().Tick(ctx)` in main.go). Without it, bootstrap would reuse the soon-to-be-cancelled game that the periodic ticker is about to mark `removed`. The pre-tick cascades the orphan runtime row through markRemoved → lobby cancel before bootstrap purges terminal sandbox games and creates a fresh one — so a single `make up` lands a working sandbox with a brand new state directory. README troubleshooting section documents the symptom and the recovery so the bind-mount-source error message is greppable. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>