The Agent Runtime — the layer that takes a plan and actually executes it — is now in internal testing at 60% readiness. Working now: the agent execution foundation and task orchestration across specialized agents. Still ahead: durable execution (tasks that survive restarts), failure recovery, and broader tool integration. Internal testing means the runtime is exercised daily against real tasks inside the development environment. It is not a public beta, and nothing here is presented as production software. When the remaining work lands, the runtime moves from internal testing to a working prototype — and the Build Status page will say so.