Ballast is a control plane and agent for Hyper-V hosts and failover clusters. The agent runs on each host and keeps enforcing its last-known-good config if the centre goes offline, catching back up automatically once reachable again. Community edition is free forever for one cluster of any size plus unlimited standalone hosts. The agent is open source (Apache 2.0); the centre is closed source. Built primarily with Claude Code under my direction, tested against real Hyper-V hosts and clusters.