Prepare a NemoClaw source checkout for compliant contribution through the repository's one-command setup and readiness doctor. Use when a new contributor asks to set up a development machine, prepare a checkout for a first PR, repair local contributor tooling, verify contributor readiness, launch the pinned coding agent, or decide whether optional runtime onboarding is needed. Trigger keywords - contributor setup, developer onboarding, first PR, dev setup, dev doctor, repair checkout, prepare development machine.