QM uses scopes to define agent-computer boundaries. CubePlex reuses an agent's long-lived capabilities in a workspace while isolating conversations, identities, and execution at each chat entry point.
YC ran into collaboration and operational problems while managing more than 50 personal agents. QM resolves Slack people, channels, groups, and projects into scopes, then places environments, access relationships, and durable sandboxes inside those boundaries.
A comparison of control-plane and sandbox-local harnesses for one-off automation, long-running agents, state recovery, multi-sandbox orchestration, and governance.
