Turn an English description (or mermaid source) into a diagram triplet: the source, an editable .excalidraw file you can open on excalidraw.com, and rendered SVG + PNG. (gstack)
Install
npx skills add garrytan/gstack --skill diagramnpx skills add garrytan/gstack --skill diagram -a claude-code -gnpx skills add garrytan/gstack --skill diagram -a codex -ggemini skills install https://github.com/garrytan/gstack.git --path diagramgh skill install garrytan/gstack diagramgit clone --depth 1 https://github.com/garrytan/gstack /tmp/garrytan__gstack
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/garrytan__gstack/diagram ~/.claude/skills/diagram # Claude Code
cp -R /tmp/garrytan__gstack/diagram ~/.agents/skills/diagram # Codex, Cursor, Gemini CLI, Copilot, OpenCode