- main.go: 30+ log.Printf → logger.Infof - plugin/registry: 12 log.Printf → logger.Infof - db/db.go, ws/hub.go: log → logger - platform-bridge: fmt.Printf/println → logger.Info - Logs now: time=... level=INFO msg=... - 16 packages pass, vet clean
- internal/plugin: Plugin/IoTProvider/ToolProvider/RAGProvider interfaces - internal/plugin: Registry with type-safe auto-detection, 11 tests - plugins/iot-mock: 8 simulated smart home devices, 11 tests - 63 total tests, build + vet clean