The Matter controller/commissioner CLI from the connectedhomeip SDK (examples/chip-tool). Commissions a Matter device over Bluetooth LE — establishing a PASE (SPAKE2+) session from the setup passcode, handing over Thread/Wi-Fi credentials with `pairing ble-thread` / `pairing ble-wifi` (or `pairing onnetwork` / `pairing code` once on-network) — then drives it with CASE-secured operational commands. Also opens a second commissioning window (`pairing open-commissioning-window`) to test multi-admin. The tool for assessing Matter onboarding and the application-layer cluster interface.