Public OSS repos never show the paid product: how you promise uptime, what you do when the site is down, how you undo a bad deploy, and the tenancy and compliance work that must exist before the first invoice. This skill covers that closed-SaaS half of an L3 product. It pairs with `github-actions-engineering` for the CI/CD workflows and `open-source-project-maintainer` for release propagation; this skill is what those two assume already exists on the production side.