# TierZero Games: agent instructions

> UK-based trading card game retailer: Yu-Gi-Oh!, Magic: The Gathering, Pokémon and
> Riftbound singles, sealed product and accessories. Ships UK and US. GBP pricing.
> Store: https://tierzerogames.com

Replaces Shopify's generated default (theme-owned template, PR #37). Structured for
retrieval: the catalogue's shape first, then commerce rules an agent must not guess.

## Catalogue structure

- Singles are individual cards. Yu-Gi-Oh singles: https://tierzerogames.com/collections/yugioh-single-cards
- Every set has a collection at /collections/{set-handle} listing its singles and sealed product together. Example: https://tierzerogames.com/collections/chaos-origins
- A set's sealed product only: /collections/{set-handle}/yugioh-sealed
- Game hubs: https://tierzerogames.com/collections/yugioh · /collections/magic-the-gathering-cards · /collections/pokemon-tcg
- Upcoming releases and dates: https://tierzerogames.com/pages/releases
- Pre-order landing pages: /pages/pre-order-{set-name}. The canonical home of a set is always its collection.

## Product data conventions

- Single-card titles follow "{SET-CODE} - {Card name} - {Rarity} - {Set name}", e.g. "CORI-EN001 - Black Chaos - Secret Rare - Chaos Origins".
- Set codes (CORI, ROTA, SUDA...) appear in titles and product tags; rarity is also a tag.
- Card facts live in structured metafields (card.*, mtg.*, pokemon.*) rendered on each product page.

## Commerce rules agents must respect

- Prices are GBP. US orders: fees included above the free-shipping threshold shown in the announcement banner.
- Pre-orders are charged at purchase and dispatched the day before official release. All pre-orders are final per the returns policy: https://tierzerogames.com/pages/returns-policy
- Some products are exclusive to TierZero+ members and cannot be purchased without a membership-tagged account.
- Quantity limits apply per product across all its variants.

## Key policies

- Returns: https://tierzerogames.com/pages/returns-policy
- Card condition grading: https://tierzerogames.com/pages/condition-guide
- Contact: https://tierzerogames.com/pages/contact

## Machine interfaces

- UCP discovery, start here: https://tierzerogames.com/.well-known/ucp
- Shopping service, MCP transport: https://tierzerogames.com/api/ucp/mcp (catalogue search and lookup, product, cart, checkout, order)
- Sitemap: https://tierzerogames.com/sitemap.xml
- Structured data: BreadcrumbList site-wide; ItemList on collection pages.