# Website Guardrails (Mandatory)

This document defines architecture guardrails that must be enforced via tests + ESLint.

Authoritative contract: [`WEBSITE_CONTRACT.md`](docs/architecture/website/WEBSITE_CONTRACT.md:1).

## 1) RSC boundary guardrails

Fail CI if any `apps/website/app/**/page.tsx`:

- imports from `apps/website/lib/view-models/*`
- imports from Presenter code (presenters live colocated with ViewModels)
- calls `Intl.*` or `toLocale*`
- performs sorting/filtering (`sort`, `filter`, `reduce`) beyond trivial null checks

## 2) Template purity guardrails

Fail CI if any `apps/website/templates/**`:

- imports from `apps/website/lib/view-models/*`
- imports from presenter code (presenters live colocated with ViewModels)
- imports from `apps/website/lib/display-objects/*`
- calls `Intl.*` or `toLocale*`

Templates accept ViewData only.

## 3) Display Object guardrails

Fail CI if any `apps/website/lib/display-objects/**`:

- calls `Intl.*` or `toLocale*`

Display Objects must be deterministic.