Imported from Interleaf-Development/MC-Draft (AGENTS.md). Install upstream with npx skills add Interleaf-Development/MC-Draft. Copyright stays with the author.

MathConcept demo conventions

• Parent and Student interfaces use Hong Kong Traditional Chinese (zh-HK) by default, including new features, dialogs, validation, accessibility labels, sample learning content and PWA metadata. Use natural Hong Kong wording: 家長、學生、老師、課堂、補堂、工作紙、繳費、收據、付款證明.
• Parent layouts target phones; Student layouts target large tablets such as iPad Pro.
• Admin and Teacher interfaces remain English unless the user requests otherwise. Shared components must choose copy by role.
• Use the explicit family locale helpers or Chinese source strings in family-only screens. Preserve identifiers, action names, canonical model values, mathematical notation, names and uploaded filenames. Do not translate or overwrite user-authored messages, notes or worksheet answers.
• Keep the demo frontend-only. Local data does not sync across devices. OCR/payment checks remain explicitly simulated.
• New locally imported modules and essential artwork must be added to the service worker cache. Bump its cache version when the asset set changes.
• Run npm run check and npm test; check changed family flows at phone/tablet widths before publishing. Vercel deploys dist/ from main.