- cmd/netsynth/main.go: Cobra root command with -i, --list-interfaces, --verbose flags
- Signal handling via signal.NotifyContext for clean Ctrl+C shutdown
- 3-stage pipeline: capture.StartCapture -> classify.NewClassifier -> aggregate.Aggregate
- Permission errors surface platform-specific sudo/setcap hint (CAPT-04)
- --verbose flag wires aggregate.PrintWindowLine callback for per-window output
- Exit summary via aggregate.PrintSummary with dropped packet warning
- cmd/netsynth/main_test.go: 3 tests covering flag parsing and help output
- go.mod: cobra v1.10.2 and go-pcap promoted to direct dependencies
