코드브레인 업그레이드 — 공개 레포 최신 ref 적용.
$npx -y skills add ezbuilder/code-brain --skill source-command-cb-upgradeInstalls into the current project.
Run `npx skills use "https://github.com/ezbuilder/code-brain" --skill "ezbuilder/code-brain/source-command-cb-upgrade"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/ezbuilder/code-brain" that are relevant to the current task. Run `npx skills add "https://github.com/ezbuilder/code-brain"` and select the relevant skills, then follow their instructions.