Learn issy from the CLI

When this skill is relevant, run:

issy learn

Follow the instructions printed by issy learn. That output is the canonical agent reference for the installed issy version.

If issy learn is unavailable because the CLI is not installed, ask the user to install issy first, then rerun issy learn.

Do not rely on this skill file for operational details. It is only a bootstrap adapter that points agents to issy learn.