Architecture & Migration
Headless commerce, composable architecture, and platform migration — the engineering decisions that determine whether re-architecting pays off or adds complexity.
10 articles
PCI DSS 4 Headless eCommerce: SAQ Scoping Guide (2026)
How headless engineering teams clear PCI DSS 4 headless eCommerce audits in 2026 — navigating SAQ-A vs SAQ-A-EP and securing Hydrogen or Catalyst.
Shopify Hydrogen Winter 2026: Production Migration Guide
Migrating from Remix to React Router v7 in Shopify Hydrogen Winter 2026 cuts build times by roughly 30% — here is our technical playbook.
Shopify CLI 4.0 Breaking Changes: Engineering Migration (2026)
Shopify CLI 4.0 ships SemVer, auto-upgrades, --force flag removal. CI/CD migration steps + the deprecated commands you must replace in 2026.
BigCommerce Web Development: Stencil vs Catalyst Costs (2026)
BigCommerce web development decision tree — when Stencil themes win, when Catalyst makes sense, and why headless builds typically cost £60K-£120K in 2026.
Hydrogen MCP → UCP Migration: Production Cutover Before June 15
Storefront Catalog MCP became UCP on April 22, 2026. The endpoint, tool names, and response schema all changed. Migration steps for Hydrogen before June 15.
Catalyst vs Hydrogen 2026: Next.js vs Remix Headless Compared
Shopify Catalyst (Next.js) vs Hydrogen (Remix) in 2026: performance benchmarks, build cost, hosting trade-offs, and which headless framework fits which storefront — engineering-led comparison.
Shopify Hydrogen 2.0: Is It Finally Production-Ready?
Hydrogen 2.0 in 2026 — what’s mature, what still bites, and whether the Remix + Oxygen stack is finally ready for production Shopify Plus storefronts.
Is Headless Commerce Worth It? A Practical Guide
When headless commerce actually pays off vs. when it adds complexity — real cost ranges, team requirements, and platforms worth considering in 2026.
Composable Commerce Explained: When MACH Pays Off (2026)
Composable commerce in 2026: what MACH actually means, when best-of-breed stacks beat monolithic Shopify Plus or BigCommerce, and the operational cost most posts skip.
Platform Migration Without the Nightmare
Platform migrations go wrong more often than they should. Here's what causes problems and how to avoid them.