Tests / Test passed: 626
- Host Agent now defaults AI_PLANNER_ENABLED=true (opt-out via env), scoped to apps/device-host-agent/host_agent/execution.py only; the shared runtime.planner_config default (disabled) is unchanged. - Add openspec proposal for cloud-planner-proxy: centralize LLM provider config/credentials on the Cloud Control Plane and let the Host Agent proxy AI Planner decisions through it instead of holding provider API keys locally. Proposal only, no implementation yet.