Start with the topic guide.
This Fish shell micro-course focuses on Process environment variables. The practice brief below is available while the full tutorial is prepared.
This is a learning outline. A complete worked tutorial has not been published for this topic yet.
Practice brief
Demonstrate process environment variables in a focused Fish shell example; verify normal behavior and one edge or failure case. Keep the exercise bounded and record the behavior supported by the chosen version.
Evidence to produce
Focused working example and verification evidence