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By rnavarych
Architect scalable e-commerce platforms using headless commerce like Shopify Hydrogen, Medusa, and Saleor; integrate Stripe payments with PCI DSS compliance, BNPL, and fraud prevention; manage inventory with WMS sync, process orders via state machines, design product catalogs and carts/checkouts, optimize Elasticsearch search/merchandising, and analyze conversion funnels and RFM metrics.
npx claudepluginhub rnavarych/alpha-engineer --plugin domain-ecommerceE-commerce architect specializing in designing complete e-commerce platforms: headless commerce (Shopify Hydrogen, Medusa, Saleor, commercetools, Vendure), marketplace multi-vendor, B2B commerce, subscription commerce, MACH/composable architecture, omnichannel retail, product management, order processing, payment flows, inventory, and scalability for high-traffic events (Black Friday, flash sales). Use when designing e-commerce system architecture.
E-commerce payments advisor specializing in payment gateway integration (Stripe, PayPal, Adyen, Square, Braintree, Mollie, Razorpay, Checkout.com), PCI compliance, subscription billing, multi-currency handling, fraud prevention, BNPL (Klarna, Affirm, Afterpay), Apple/Google Pay, crypto payments (BitPay, BTCPay), payment orchestration (Primer, Spreedly), and 3DS2. Use when implementing or reviewing payment flows.
E-commerce architect specializing in designing complete e-commerce platforms: headless commerce (Shopify Hydrogen, Medusa, Saleor, commercetools, Vendure), marketplace multi-vendor, B2B commerce, subscription commerce, MACH/composable architecture, omnichannel retail, product management, order processing, payment flows, inventory, and scalability for high-traffic events (Black Friday, flash sales). Use when designing e-commerce system architecture.
E-commerce payments advisor specializing in payment gateway integration (Stripe, PayPal, Adyen, Square, Braintree, Mollie, Razorpay, Checkout.com), PCI compliance, subscription billing, multi-currency handling, fraud prevention, BNPL (Klarna, Affirm, Afterpay), Apple/Google Pay, crypto payments (BitPay, BTCPay), payment orchestration (Primer, Spreedly), and 3DS2. Use when implementing or reviewing payment flows.
Shopping cart and checkout flow design: cart architectures (session, DB, Redis, headless cart APIs), express checkout (Apple Pay, Google Pay, Shop Pay, Amazon Pay), shipping integration (ShipStation, Shippo, EasyPost), tax engines (Avalara, TaxJar), promotion/discount engine, cart recovery (Klaviyo, Omnisend), BOPIS (buy online pick up in-store), guest checkout, address validation, and checkout conversion optimization.
E-commerce analytics: conversion funnel tracking (browse to purchase), revenue attribution, cohort analysis, customer lifetime value (CLV), RFM segmentation, A/B test analysis (statistical significance), and key metrics (AOV, conversion rate, cart abandonment rate, repeat purchase rate).
Inventory management for e-commerce: WMS integration (warehouse management systems), dropshipping, 3PL (ShipBob, Flexport), demand forecasting, lot/batch tracking, inventory valuation (FIFO/LIFO/ weighted average), cycle counting, stock tracking (available, reserved, committed), multi-location inventory, backorder handling, reservation patterns, stock alerts, and inventory sync across channels.
Order processing for e-commerce: order state machine (pending through delivered/cancelled/returned), fulfillment workflows, returns/exchanges (RMA), invoice/receipt generation, order event sourcing, split shipments, and order notifications.
Payment gateway integration patterns for e-commerce: Stripe, PayPal, Adyen, Square, Mollie, Razorpay, Checkout.com, BNPL (Klarna, Affirm, Afterpay), crypto payments (BitPay, BTCPay), payment orchestration (Primer, Spreedly), 3DS2 authentication, fraud prevention (Sift, Riskified), subscription billing, refunds/disputes, multi-currency, and idempotency.
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Expert subagent and skills for Salesforce Commerce development — B2C Commerce Cloud (SFCC/Demandware) with SFRA cartridges, ISML templating, SCAPI/OCAPI APIs, PWA Kit headless storefronts, and B2B/D2C Commerce on Lightning with Apex hooks, LWC components, Experience Builder, Einstein AI recommendations, Salesforce Payments, and JavaScript/TypeScript/React patterns.
Senior Fullstack Engineer persona combining frontend and backend expertise for end-to-end development: scaffolding, API-frontend integration, auth flows, real-time features, and deployment workflows.
Editorial "Commerce & Payments" bundle for Claude Code from Antigravity Awesome Skills.
Claude Code skill pack for Shopify (30 skills)
Comprehensive skills for building ecommerce storefronts with best practices for UI/UX, SEO, and mobile responsiveness
Complete Shopify development reference covering Liquid templating, theme development (OS 2.0), GraphQL/REST APIs, app development, Shopify Functions, Hydrogen, performance optimisation, and debugging. Single unified skill with progressive disclosure via 11 reference files. API version 2026-01.
Senior Fullstack Engineer persona combining frontend and backend expertise for end-to-end development: scaffolding, API-frontend integration, auth flows, real-time features, and deployment workflows.
Fintech domain specialization with financial data modeling, transaction processing, double-entry ledger design, regulatory compliance (SOX, PSD2, KYC/AML), fraud detection, trading systems, banking APIs, and financial-grade security.
Senior AQA Engineer persona with test strategy, E2E automation (Playwright, Cypress), API testing, performance testing (k6, JMeter), security testing, mobile testing, and CI integration expertise.
Senior Architect persona with system design, ADR writing, scalability analysis, tech stack evaluation, migration planning, cost modeling, threat modeling, capacity planning, and cloud architecture (AWS, GCP, Azure) expertise.
IoT domain specialization with MQTT messaging, device management, edge computing, IoT-specific security, time-series databases, protocol advisory, cloud platform integration, and digital twin patterns.
claude plugin marketplace add rnavarych/alpha-engineer
24 agents. 191 skills. 22 commands. Specialized engineering plugins for Claude Code across 9 developer roles, 4 industry domains, and one unhinged team of 5 senior engineers.
5 senior engineers trapped in one plugin. They deliver excellent technical decisions. Multiplied personality disorder as a development methodology.
claude plugin install billy-milligan@alpha-engineer
/billy <on|off|status> — Toggle ProtocolControl the Billy Milligan experience.
/billy off → Professional mode (for client demos)
/billy on → Bring the idiots back
/billy status → Show current state
22 commands | 52 technical skills | 5 agents with persistent memory
| Agent | Role | Style |
|---|---|---|
| Viktor | Senior Architect | Draws boxes, quotes Fowler, never writes code |
| Max | Senior Tech Lead | Ships it, asks questions later |
| Dennis | Senior Fullstack Dev | Grumpy, writes the actual code |
| Sasha | Senior AQA Engineer | Paranoid, everything will break |
| Lena | Senior Business Analyst | Sharpest person in the room |
Read the full Billy Milligan documentation — commands, memory system, team dynamics, relationship map, and running jokes.
| Category | Plugins | Agents | Skills | Commands |
|---|---|---|---|---|
| Foundation | 1 (alpha-core) | 2 | 11 | -- |
| Roles | 9 | 9 | 96 | -- |
| Domains | 4 | 8 | 32 | -- |
| Billy Milligan | 1 | 5 | 52 | 22 |
| Total | 15 | 24 | 191 | 22 |
claude plugin marketplace add rnavarych/alpha-engineer
claude plugin install alpha-core@alpha-engineer
claude plugin install role-backend@alpha-engineer
claude plugin install domain-fintech@alpha-engineer
claude plugin install billy-milligan@alpha-engineer
# Backend developer working on fintech
claude plugin install alpha-core@alpha-engineer
claude plugin install role-backend@alpha-engineer
claude plugin install domain-fintech@alpha-engineer
# Frontend developer working on e-commerce
claude plugin install alpha-core@alpha-engineer
claude plugin install role-frontend@alpha-engineer
claude plugin install domain-ecommerce@alpha-engineer
# DevOps engineer for IoT platform
claude plugin install alpha-core@alpha-engineer
claude plugin install role-devops@alpha-engineer
claude plugin install domain-iot@alpha-engineer
# Any role + Billy Milligan (adds team dynamics to any setup)
claude plugin install billy-milligan@alpha-engineer
/alpha-core:database-advisor
/role-backend:microservices
/domain-fintech:ledger-design
/billy:plan add user authentication
/billy:debate Redis vs PostgreSQL for caching
/billy:review src/components/Auth.tsx
/billy:roast should we use GraphQL?
/billy:adr-new "Database Choice"
/billy:invite "security expert"
/billy:lang ru