Agent harnesses, memory, verification, and runtime safety become the capability battleground

Evidence increasingly shows that agent performance depends on orchestration: ActiveSaddler and AutoGUIWorld report meaningful harness and synthetic-trajectory gains, while explicit belief states target long-horizon recovery. Offrun's parallel worktrees and session/permission management illustrate the tooling layer forming around multi-agent coding, but merge and review burdens remain. Messaging-based personal agents expand delegated actions without yet providing strong reliability or safety evidence; runtime identity, endpoint, sandbox, and verification failures remain central risks.