Playbook for rebuilding an existing web tool as a free, open-source, serverless static app — autonomously, to a polished, reviewed result. Use when the user wants to clone/remake a site as FOSS they can self-host "forever", especially when the underlying data comes from a public/open API. Covers spec-driven scoping, a static no-backend architecture, a model cascade, a verification loop (build + tests + headless screenshot), and an adversarial multi-lens review (correctness, a11y, security, AND design).
2026-06-25