tanshu
de0553d0d4
The route from "mozimo.in displays Shopify products" to "mozimo.in sells them", as a plan with a phase spine and gates, plus the open decision tickets that still shape it and the evidence they rest on. - .scratch/shopify-headless-commerce/: plan.md (phases and gates), map.md (the wayfinder map), 10 open decision tickets - CONTEXT.md: Storefront / Theme store / Cart / Parity vocabulary - docs/adr/0001-0003: Checkout stays Shopify-hosted, one Variant per product, the checkout domain stays shop.mozimo.in - docs/research/ and docs/shopify-catalog-inventory.md: verified store facts, the Cart API probe, and the catalogue inventory Raw Shopify doc scrapes under .scratch/shopify-research/ are ignored: they are working material, not record.
20 lines
810 B
Markdown
20 lines
810 B
Markdown
# Cart persistence and SSR hydration
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`Type:` grilling (HITL)
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`Status:` open
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`Blocked by:` 01
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Part of [the map](../map.md).
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## Question
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How is a Cart identified and carried across requests? Shopify addresses a Cart by ID, and this Storefront renders on the server, so the mechanism has to survive both.
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Decide: where the Cart ID lives (an httpOnly cookie the server sets, client storage, or both), what its attributes are, and how the client hydrates without a flash of an empty Cart.
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Decide the failure paths too, because both are reachable: a Cart expires after 30 days, and Shopify deletes it on checkout completion — so a returning buyer can arrive holding a cookie that points at nothing. What happens then — silent re-create, cleared Cart, or an error?
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## Answer
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<!-- filled on resolution -->
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