Systematic debugging with root cause investigation. (gstack)
Install
npx skills add garrytan/gstack --skill investigatenpx skills add garrytan/gstack --skill investigate -a claude-code -gnpx skills add garrytan/gstack --skill investigate -a codex -ggemini skills install https://github.com/garrytan/gstack.git --path investigategh skill install garrytan/gstack investigategit clone --depth 1 https://github.com/garrytan/gstack /tmp/garrytan__gstack
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/garrytan__gstack/investigate ~/.claude/skills/investigate # Claude Code
cp -R /tmp/garrytan__gstack/investigate ~/.agents/skills/investigate # Codex, Cursor, Gemini CLI, Copilot, OpenCode