Unit 7 Wrap-Up: Which Boundary Saved You From the Wrong Repair?

Use your Repeatable Startup Runbook and Java-to-ROS Integration Contract. Respond in 75–125 words or make an equivalent one-minute recording. Use at least two exact labels from your artifacts, such as ros2 pkg prefix, robotnix_bringup, demo_pair.launch.py, /robotnix/demo, or install/setup.bash.

1. Which startup failure became easier once you identified the correct source/build/shell/launch/graph layer?
2. What evidence in your runbook proves the ROS bringup is reproducible from a clean shell?
3. What exact Java-to-ROS evidence is still missing before you could claim the two runtimes are integrated?