setup

Make a repo agent-ready for sstack, new or existing. Audits the repo and the machine read-only, shows one table of recommended changes, and writes only the rows the user picks - .sstack/product.md (what the app is, linking deeper docs), .sstack/project.toml, the verify commands, the code graph, and one AGENTS.md row. Use for "set up this repo", "onboard", "make this repo sstack-ready", or when work finds no .sstack/product.md on a sizeable task.