How do I install the Ecommerce skill?

Run npx skillmds@latest add modbender/ecommerce in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Ecommerce safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: docs only. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Ecommerce?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Ecommerce free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Ecommerce?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Ecommerce by modbender — Agent Skill

Name: Ecommerce
Rating: 4.2 (5 reviews)
Author: modbender

File contents

Quick Reference

Topic	File
Code traps that break production	`code-traps.md`
Platform comparison (costs, features)	`platforms.md`
Operations (stock, shipping, returns)	`operations.md`
Growth (CRO, upsells, LTV, benchmarks)	`growth.md`

Critical Code Traps

These break production and cost real money. See code-traps.md for full patterns.

Payment idempotency — Store payment_intent_id, check before processing. Webhooks retry.
Inventory race conditions — UPDATE ... WHERE stock > 0 with rowsAffected check, not read-then-write.
Frontend price trust — Backend recalculates everything. Never trust client totals.
Webhook signatures — Verify stripe-signature or equivalent. Reject unsigned requests.
Stock validation timing — Verify at payment moment, not just add-to-cart.

Core Rules

When Building Stores

Calculate ALL prices server-side — discounts, shipping, taxes, totals
Queue transactional emails — never inline in checkout flow
Add structured data (Schema.org Product) and canonical URLs from day one
Implement webhook signature verification before going live

When Operating Stores

Monitor stock thresholds, not just zero — alert at reorder point
Track orders stuck in "processing" >24h — detect before customer complains
Log payment failures with context — card decline reasons matter for recovery

When Optimizing

Checkout recovery: 1h, 24h, 72h sequence — discount on email 3, not 1
Free shipping threshold: current AOV + 20-30%
Mobile: sticky add-to-cart, Apple Pay/Google Pay, LCP <2.5s

Platform Decision Tree

Budget <€500/mo, <100 SKUs: Shopify Basic or WooCommerce self-hosted
Multi-marketplace: Dedicated sync tool (not manual updates)
>1000 SKUs or ERP: WooCommerce/custom with PIM integration

For Spain-specific costs (IVA, OSS, carriers), see platforms.md.

Scope

This skill helps with:

Store architecture and payment integration
Inventory and order management logic
Marketplace listing optimization
Conversion rate tactics with benchmarks
Legal/fiscal guidance for EU/Spain ecommerce

This skill does NOT:

Connect to live store APIs (explain how, not execute)
Store business data or credentials
Make purchasing or pricing decisions autonomously

---name: ecommercedescription: Build and operate online stores with payment security, inventory management, marketplace integration, and conversion optimization.--- ## Quick Reference | Topic | File | |-------|------| | Code traps that break production | `code-traps.md` | | Platform comparison (costs, features) | `platforms.md` | | Operations (stock, shipping, returns) | `operations.md` | | Growth (CRO, upsells, LTV, benchmarks) | `growth.md` | ## Critical Code Traps These break production and cost real money. See `code-traps.md` for full patterns. 1. **Payment idempotency** — Store `payment_intent_id`, check before processing. Webhooks retry. 2. **Inventory race conditions** — `UPDATE ... WHERE stock > 0` with `rowsAffected` check, not read-then-write. 3. **Frontend price trust** — Backend recalculates everything. Never trust client totals. 4. **Webhook signatures** — Verify `stripe-signature` or equivalent. Reject unsigned requests. 5. **Stock validation timing** — Verify at payment moment, not just add-to-cart. ## Core Rules ### When Building Stores - Calculate ALL prices server-side — discounts, shipping, taxes, totals - Queue transactional emails — never inline in checkout flow - Add structured data (Schema.org Product) and canonical URLs from day one - Implement webhook signature verification before going live ### When Operating Stores - Monitor stock thresholds, not just zero — alert at reorder point - Track orders stuck in "processing" >24h — detect before customer complains - Log payment failures with context — card decline reasons matter for recovery ### When Optimizing - Checkout recovery: 1h, 24h, 72h sequence — discount on email 3, not 1 - Free shipping threshold: current AOV + 20-30% - Mobile: sticky add-to-cart, Apple Pay/Google Pay, LCP <2.5s ## Platform Decision Tree - **Budget <€500/mo, <100 SKUs**: Shopify Basic or WooCommerce self-hosted - **Multi-marketplace**: Dedicated sync tool (not manual updates) - **>1000 SKUs or ERP**: WooCommerce/custom with PIM integration For Spain-specific costs (IVA, OSS, carriers), see `platforms.md`. ## Scope This skill helps with: - Store architecture and payment integration - Inventory and order management logic - Marketplace listing optimization - Conversion rate tactics with benchmarks - Legal/fiscal guidance for EU/Spain ecommerce This skill does NOT: - Connect to live store APIs (explain how, not execute) - Store business data or credentials - Make purchasing or pricing decisions autonomously

Frequently asked questions

Ecommerce