Skill Sync — Detect & Apply CLI Changes

After a new mmk CLI version ships, run this skill to find what changed, update the SKILL.md files, and raise a PR automatically.

Diff-only mode: If the user says "just show the diff" or "dry run", stop after Phase 4.

Phase 1: Upgrade & Version Check

First, upgrade the CLI to the latest version, then confirm the version:

mmk upgrade
mmk version -o json

Report the upgraded version (old → new) to the user before continuing. If already on the latest version, report the current version and proceed.