Sync ag-shared Subrepo Across AG Repos

Orchestrate syncing external/ag-shared/ changes from the current repo to all other AG repos that consume the subrepo. This handles the full yarn subrepo push / pull cycle, companion changes, and cross-linked PRs.

Help

If the user provides a command option of help:

• Explain how to use this skill.
• Explain the prerequisites and what will happen.
• DO NOT proceed, exit the skill immediately after these steps.

Prerequisites