Prerequisite Checkpoint: Prove the ROS 2 Environment

This bridge assumes you already know how to source ROS 2 Jazzy from ros2-for-students.

Your task is only to prove the shell is ready before making runtime claims.

Capture:

printenv ROS_DISTRO
ros2 --help

Then record whether the shell is sourced, unsourced, or ambiguous.

Bridge rule

A failed ros2 command can be an environment problem rather than a graph problem. Do not diagnose missing nodes until the shell itself is confirmed.

Write:

shell state:
evidence:
next claim now allowed:
claim still not allowed:

If sourcing and shell setup are unfamiliar, return to ros2-for-students. This route is a readiness check, not a second ROS installation lesson.