Diagnose a ynh setup that is not working — a harness that will not install, a launcher that is not found, a vendor that cannot see the skills, instructions that are not applied, or a check that gates for no visible reason. Use when something is broken and it is not obvious why.
Install
npx skills add eyelock/ynh --skill ynh-troubleshootnpx skills add eyelock/ynh --skill ynh-troubleshoot -a claude-code -gnpx skills add eyelock/ynh --skill ynh-troubleshoot -a codex -ggemini skills install https://github.com/eyelock/ynh.git --path skills/ynh-troubleshootgh skill install eyelock/ynh ynh-troubleshootgit clone --depth 1 https://github.com/eyelock/ynh /tmp/eyelock__ynh
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/eyelock__ynh/skills/ynh-troubleshoot ~/.claude/skills/ynh-troubleshoot # Claude Code
cp -R /tmp/eyelock__ynh/skills/ynh-troubleshoot ~/.agents/skills/ynh-troubleshoot # Codex, Cursor, Gemini CLI, Copilot, OpenCode