Prerequisite Checkpoint: Verify the Graph Inventory

With the shell confirmed, inspect the runtime rather than reteaching node fundamentals.

Use supplied or local evidence from commands such as:

ros2 node list
ros2 topic list

Record the observed node and topic names with the environment and time/context of the observation.

Bridge question

What does the graph inventory prove?

It can prove that named graph entities were visible to that ROS 2 environment at that moment. It does not prove message correctness, physical hardware response, or a Java/WPILib integration path.

Write one proved claim and two not demonstrated claims.

If node/topic vocabulary itself is unfamiliar, return to ros2-for-students. This bridge only verifies that the prerequisite runtime skill is active.