Skill

domain-ecommerce:cart-checkout

Designs e-commerce shopping carts and checkout flows: architectures (session/DB/Redis/headless APIs), express checkout (Apple Pay/Google Pay/Shop Pay), shipping/tax integrations (Shippo/Avalara), promotions, cart recovery (Klaviyo), BOPIS.

Redis

backend

api-development

npx claudepluginhub rnavarych/alpha-engineer --plugin domain-ecommerce

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How this skill is triggered — by the user, by Claude, or both

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/domain-ecommerce:cart-checkout

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This skill is limited to the following tools:

ReadGrepGlobBash

Context Preview

The summary Claude sees in its skill listing — used to decide when to auto-load this skill

- Designing or rebuilding a shopping cart (storage strategy, data model, merge logic)

Supporting Files

references/cart-architecture.mdreferences/checkout-flow-tax-shipping.mdreferences/express-checkout.mdreferences/promotions-recovery-bopis.md

SKILL.md

35 lines · ~593 tokens

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Parent stars13

Parent forks1

MaintenanceGood

Last CommitMar 3, 2026

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Cart and Checkout

When to use

Designing or rebuilding a shopping cart (storage strategy, data model, merge logic)

Implementing express checkout methods (Apple Pay, Google Pay, Shop Pay, Amazon Pay)

Building or integrating a checkout flow (single-page, multi-step, guest checkout)

Wiring up shipping aggregators or tax engines (Avalara, TaxJar, ShipStation, EasyPost)

Building a promotion/discount engine with rules, stacking, and abuse prevention

Setting up abandoned cart recovery sequences (Klaviyo, Omnisend, or custom)

Implementing BOPIS with real-time store inventory and pickup notifications

Core principles

Validate the cart on every read — prices, stock, and promotions change; never trust a stale cart total

Express checkout above the fold — Apple Pay + Google Pay on product pages and cart converts before standard checkout even loads

Guest checkout is not optional — forced registration causes 10-25% abandonment; post-purchase signup instead

Shipping rate circuit breaker — always fall back to flat-rate if carrier APIs are down; never block checkout

Recovery sequence timing matters — T+1h (reminder), T+24h (urgency), T+72h (discount); discount-first burns margin

Reference Files

references/cart-architecture.md — storage strategies (session/DB/Redis/headless/hybrid), data model, cart merging, cart validation

references/express-checkout.md — Apple Pay, Google Pay, Shop Pay, Amazon Pay integration patterns and best practices

references/checkout-flow-tax-shipping.md — single-page vs. multi-step checkout, guest flow, address validation, shipping aggregators, tax engine integration

references/promotions-recovery-bopis.md — promotion engine architecture, discount types, Klaviyo/Omnisend cart recovery, BOPIS flow and technical requirements

Cart and Checkout

When to use

Designing or rebuilding a shopping cart (storage strategy, data model, merge logic)
Implementing express checkout methods (Apple Pay, Google Pay, Shop Pay, Amazon Pay)
Building or integrating a checkout flow (single-page, multi-step, guest checkout)
Wiring up shipping aggregators or tax engines (Avalara, TaxJar, ShipStation, EasyPost)
Building a promotion/discount engine with rules, stacking, and abuse prevention
Setting up abandoned cart recovery sequences (Klaviyo, Omnisend, or custom)
Implementing BOPIS with real-time store inventory and pickup notifications

Core principles

Validate the cart on every read — prices, stock, and promotions change; never trust a stale cart total
Express checkout above the fold — Apple Pay + Google Pay on product pages and cart converts before standard checkout even loads
Guest checkout is not optional — forced registration causes 10-25% abandonment; post-purchase signup instead
Shipping rate circuit breaker — always fall back to flat-rate if carrier APIs are down; never block checkout
Recovery sequence timing matters — T+1h (reminder), T+24h (urgency), T+72h (discount); discount-first burns margin

Reference Files

references/cart-architecture.md — storage strategies (session/DB/Redis/headless/hybrid), data model, cart merging, cart validation
references/express-checkout.md — Apple Pay, Google Pay, Shop Pay, Amazon Pay integration patterns and best practices
references/checkout-flow-tax-shipping.md — single-page vs. multi-step checkout, guest flow, address validation, shipping aggregators, tax engine integration
references/promotions-recovery-bopis.md — promotion engine architecture, discount types, Klaviyo/Omnisend cart recovery, BOPIS flow and technical requirements

domain-ecommerce:cart-checkout

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Supporting Files

SKILL.md

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domain-ecommerce:cart-checkout

Popularity

Invocation

Tool Access

Context Preview

Supporting Files

SKILL.md

Cart and Checkout

When to use

Core principles

Reference Files

Similar Skills

Help us improve

Cart and Checkout

When to use

Core principles

Reference Files