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Shopify & BigCommerce Engineering Notes

Thoughts on eCommerce development, lessons from projects, and the occasional technical deep-dive.

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Security21 October 2026

PHP2Shell: Critical PHP Vulnerability Fixed on 21 October 2026

PHP2Shell (CVE-2026-109618, CVE-2026-109619) allows unauthenticated RCE. Patch to PHP 8.5.12, 8.4.27, 8.3.36 or 8.2.35. Shopify, WooCommerce and Magento: who must act.

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Security22 October 2026

Node.js Vulnerability: Brotli RCE Fixed on 21 October 2026

Node.js Brotli decoder RCE (CVE-2026-111497) and nine more CVEs fixed in 26.12.1, 24.22.1 and 22.23.4. What Vercel, Netlify and Shopify app teams must do.

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Security22 October 2026

Railway Security Breach: Rotate Environment Variables Now

Railway security breach: environment variables may have been exposed. Rotate every secret, Stripe keys first, deploy the changes and check for misuse.

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Security1 November 2026

GitLab CVE-2026-97229: Exploited Regex RCE, Patch Now

CISA lists GitLab CVE-2026-97229, a CVSS 10.0 regex flaw in CI/CD, as exploited. Fixed GitLab versions, the Ruby 3.4.12 fix and how to check your server.

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Security31 October 2026

Vercel Breach: The Context.ai Attack and What to Rotate

How the April 2026 Vercel breach started at Context.ai, who was affected, why Vercel closed it on 16 October, and which secrets to rotate and check now.

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Security30 October 2026

WordPress 7.1.4 Security Release: 22 Fixes, Update Now

WordPress 7.1.4 fixes 22 vulnerabilities, including a race condition in core updates that could lead to remote code execution. Fixed versions and how to update.

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Engineering28 October 2026

What Is Cloudflare? Speed Test, CDN and WAF for Ecommerce

What Cloudflare is, what the Cloudflare speed test measures, and how its CDN, cache, WAF and Turnstile apply to Shopify, WooCommerce and Magento stores.

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Security28 October 2026

PolyShell Magento Vulnerability (CVE-2026-48356): Patch Now

CISA says PolyShell (CVE-2026-48356) in Magento and Adobe Commerce is exploited. Affected versions, the APSB26-73 fix and how to check your store.

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Engineering27 October 2026

LiteLLM Alternatives: 5 LLM Gateways Compared (2026)

OpenRouter, Vercel AI Gateway, Cloudflare AI Gateway, Portkey and Kong compared with LiteLLM: hosting, open source, BYOK and pricing, from vendor docs.

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Security27 October 2026

Is My Next.js Version Vulnerable? How to Check and Fix

Check your installed Next.js version in one command, compare it with the 2026 security advisories, and upgrade to 16.4.1 or 15.5.28 or later.

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Security27 October 2026

Next.js RCE Vulnerability: Upgrade to 16.4.1 or 15.5.28

Two critical Next.js RCE flaws and a Server Actions DoS, fixed in 16.4.1 and 15.5.28 on 14 October 2026. Affected versions, workarounds and how to patch.

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Security27 October 2026

LiteLLM Supply Chain Attack: Was v1.107.0 in Your Stack?

LiteLLM 1.107.0 on PyPI and Docker carried a credential stealer on 21 October 2026. Exposure windows, how to check, what to rotate, and how it happened.

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Engineering26 October 2026

Which Ecommerce Shipping Software Fits Your Order Volume?

Packing by hand at a bench, or printing labels straight from a WMS? How order volume decides between a UI shipping platform and a shipping API.

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Security22 October 2026

Node.js Vulnerability: Brotli RCE Fixed on 21 October 2026

Node.js Brotli decoder RCE (CVE-2026-111497) and nine more CVEs fixed in 26.12.1, 24.22.1 and 22.23.4. What Vercel, Netlify and Shopify app teams must do.

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Security22 October 2026

Railway Security Breach: Rotate Environment Variables Now

Railway security breach: environment variables may have been exposed. Rotate every secret, Stripe keys first, deploy the changes and check for misuse.

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Engineering22 October 2026

How to Update PHP in WordPress Without Breaking Your Store

How to update PHP in WordPress: check the version in Site Health, back up, test plugins, switch PHP in your host panel and fix common errors after the update.

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Engineering22 October 2026

Your PHP Installation Appears to Be Missing the MySQL Extension

Fix the WordPress error "Your PHP installation appears to be missing the MySQL extension": enable mysqli for the new PHP version, restart PHP and verify.

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Engineering22 October 2026

PHP End of Life Dates and Supported Versions in 2026

PHP end of life dates and supported versions for 2026: 8.2 to 8.5 support dates, older EOL dates, PHP 8.6, and what WordPress, WooCommerce and Magento need.

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Security21 October 2026

PHP2Shell: Critical PHP Vulnerability Fixed on 21 October 2026

PHP2Shell (CVE-2026-109618, CVE-2026-109619) allows unauthenticated RCE. Patch to PHP 8.5.12, 8.4.27, 8.3.36 or 8.2.35. Shopify, WooCommerce and Magento: who must act.

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Automation19 October 2026

Shopify Flow Trigger Lifecycle Callback Extensions: Relative URLs

Shopify Flow trigger lifecycle callback extensions now accept relative paths, resolved against your tunnel in app dev and application_url on deploy.

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AI Commerce16 October 2026

MCP Events in Vercel Connect: What Changed and What to Do

Vercel Connect MCP Events is in public beta. What changed, the Node.js and Python prerequisites, OIDC linking, subscription lifetimes and how to verify deliveries.

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AI Commerce14 October 2026

Shop MCP: Catalog Search and Shop Pay Checkout for Agents

Shop MCP gives agents Shopify Catalog search, carts and Shop Pay checkout in one connection: the tool flows, the sign-in rules and the no-webhook gap.

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AI Commerce12 October 2026

Visa Mastercard PayPal Agentic AI Commerce: What UK Shops Can Use

Visa Mastercard PayPal agentic AI commerce for merchants: agent tokens, trusted-agent checks, Agent Ready, Store Sync limits and what to do first.

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Engineering12 October 2026

OpenAI Decisions API on Vercel AI Gateway: Setup and Limits

Use the OpenAI Decisions API through Vercel AI Gateway at /v1/decisions: the three question types, SDK minimums, a worked example and the limits.

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Engineering7 October 2026

Shopify QuickBooks Integration Not Syncing? Fix the Ledger

Shopify QuickBooks integration not syncing? Stop duplicate invoices with request ID tracking and reconcile payouts via GraphQL balance transactions.

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Engineering6 October 2026

BigCommerce vs Shopify vs WooCommerce: Which Platform Scales

BigCommerce vs Shopify vs WooCommerce compared on hosting, custom logic, API limits and selling abroad, with a decision sequence for growing stores.

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Engineering5 October 2026

Klaviyo vs Mailchimp: Which Data Model Fits Your Store?

Klaviyo vs Mailchimp on data models: Klaviyo events and profiles against Mailchimp stores and merge fields, and which fits a store built on custom events.

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AI Commerce3 October 2026

Agentic Commerce Journey Discovery to Transaction, Mapped

The agentic commerce journey discovery to transaction, step by step: what an AI agent asks your store for at each stage and what you must return.

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Engineering2 October 2026

ShopifyQL parseWarnings: What It Returns and What to Add

What the new ShopifyQL parseWarnings field returns, how it differs from parseErrors, and the selection to add to your queries.

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Engineering30 September 2026

Move Existing Subscriptions to Shopify App Pricing: Two Paths

Move existing subscriptions to Shopify App Pricing from the Partner Dashboard or Shopify CLI, with no merchant re-approval. Which path fits which plan.

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Engineering29 September 2026

WooCommerce PHP 8.1 Requirement: What Changed and What to Do

WooCommerce PHP 8.1 becomes the minimum in version 11.6. See what the 11.3 notice means, how to test extensions on staging, and when to upgrade the host.

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Shopify27 September 2026

Shopify SEO Tools, Native Settings or Theme Code Fixes?

Shopify SEO tools mostly edit fields the admin already has. See what native settings cover, when an app helps, and which fixes need theme code.

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Strategy26 September 2026

Custom Ecommerce Development: Configure, Extend or Rebuild?

Custom ecommerce development pays back in ERP-driven pricing, checkout logic and system syncs. See when to configure, extend via APIs, or rebuild.

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AI Commerce25 September 2026

Six AI Searchability Checks to Get Your Store Cited

AI searchability defines how assistants extract your catalogue. Check crawler rules, server-rendered HTML, and schema across your store to earn citations.

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Engineering24 September 2026

Shop Pay on Non-Shopify Stores: BigCommerce, WooCommerce, SFCC

Shop Pay on BigCommerce, WooCommerce, Magento or SFCC without replatforming: what Shopify handles, what you build, and why a Shopify store is still needed.

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BigCommerce23 September 2026

BigCommerce Multi-Language Storefront: Stencil or Catalyst

Run one BigCommerce multi-language storefront without a duplicate catalogue. What Stencil and Catalyst each need, plus the Translations Admin GraphQL API.

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BigCommerce23 September 2026

BigCommerce Catalyst CLI: Monorepo Upgrades in 2026

BigCommerce Catalyst CLI replaces monorepo forks with clean Next.js snapshots and three-way merge upgrades. Here is how to migrate, verified September 2026.

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AI Commerce23 September 2026

Agentic Commerce Risks and Mitigation Strategies in 2026

Control agentic commerce risks and mitigation strategies: manage AP2 mandates, ACP delegated tokens, and feed drift. Verified September 2026.

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Engineering23 September 2026

Ecommerce Development in 2026: Scope, Architecture and Delivery

Ecommerce development scoped layer by layer: what the work covers on Shopify Plus, BigCommerce and WooCommerce, how a build runs from discovery to hypercare.

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NetSuite22 September 2026

What NetSuite Pricing Actually Costs in 2026 (The Bill)

NetSuite pricing is quote-based. What drives the bill: service tier, modules, user seats, sandboxes, connectors and implementation partner fees.

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Strategy21 September 2026

What Stripe Stablecoin Checkout Costs and Where It Breaks

Stripe stablecoin checkout charges 0.8% into fiat, but disputes cannot be raised and UK accounts cannot enable it. Verified September 2026.

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Strategy18 September 2026

WooCommerce Alternatives for Scaling Past £1M GMV in 2026

Comparing WooCommerce alternatives: hosted platforms eliminate plugin conflicts and database locks above £1M GMV, verified September 2026.

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Strategy18 September 2026

Cloud Based Ecommerce Platforms: SaaS, PaaS or Composable?

Compare cloud based ecommerce platforms across SaaS, PaaS, and composable setups. Most UK mid-market brands need SaaS, verified September 2026.

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Engineering16 September 2026

Agentic Payments vs Standard Checkout: What Actually Changes

Agentic payments replace browser checkouts with scoped tokens from Stripe, Visa, and AP2. Here is who bears liability, verified September 2026.

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BigCommerce14 September 2026

What BigCommerce Development Cost Runs to in the UK (2026)

UK BigCommerce development starts from £5,000 to adapt a Stencil theme, £15,000 for a custom theme and £20,000 for Catalyst headless. What drives the bill.

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B2B12 September 2026

B2B Ecommerce Platform Comparison 2026: Which Fits Your Stack

B2B ecommerce platform comparison: company hierarchy, pricing and quoting on Shopify Plus, BigCommerce, Adobe, Salesforce, commercetools and OroCommerce.

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BigCommerce9 September 2026

What BigCommerce B2B Edition Pricing Covers in 2026

BigCommerce B2B Edition pricing is custom-quoted above standard plans, typically adding around £1,000-£2,500/month for buyer portals: verified September 2026.

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BigCommerce7 September 2026

BigCommerce REST Management API: Handling 429s and Seams

Tame the BigCommerce REST Management API: handle 429 rate limits, 250-item catalog pagination, and the V2 orders seam. Verified September 2026.

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Shopify7 September 2026

What Klaviyo Pricing Actually Costs a Shopify Store (2026)

Klaviyo pricing scales from around £16/month at 500 profiles to around £580/month at 50,000, driven by active contacts, not sends: verified September 2026.

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Shopify Plus5 September 2026

Shopify Checkout Extensibility Tracking: Web Pixels Guide

Fix shopify checkout extensibility tracking using Web Pixels and GTM. Rebuild GA4 purchase events inside the sandbox: verified September 2026.

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Shopify4 September 2026

Shopify Bundles Without App: Native API and Functions

Build Shopify bundles without app subscriptions using native APIs and Cart Transform Functions. Covers the 30-component limit, verified September 2026.

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Engineering2 September 2026

How Shopify Webhook Retries Break in Production (2026)

Shopify webhook retries run 8 times over 4 hours before subscriptions drop. How 5s timeouts lose orders and how to build safe queues (verified Sep 2026).

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Strategy1 September 2026

What Adobe Commerce Pricing Actually Costs in 2026

Adobe Commerce pricing is quote-based and scales with GMV. What drives the real bill: licence, hosting, implementation partner fees and upgrade retainers.

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AI Commerce30 August 2026

Shopify Sidekick in Production: Engineering Review (2026)

Shopify Sidekick is free on core plans but has no public REST API. We review its app extensions, Shopify's MCP servers and admin limits: verified August 2026.

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Shopify Plus29 August 2026

Shopify Advanced vs Shopify Plus Upgrade: When It Pays (2026)

The Shopify Advanced vs Shopify Plus upgrade pays once API throttles, checkout extensions or B2B catalogues block revenue, usually around £1M+ GMV.

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Shopify26 August 2026

Google Not Indexing PDFs: Migrate Merchant Docs to HTML

Google not indexing PDFs as before? Convert size charts and spec sheets to Shopify metaobjects and HTML pages. Verified August 2026.

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BigCommerce26 August 2026

BigCommerce Shipping Carrier Rates: Real-Time APIs (2026)

Calculate live BigCommerce shipping carrier rates without checkout timeouts. Compare ShipStation, ShipperHQ, and custom 3PL APIs. Verified August 2026.

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Shopify Plus26 August 2026

UK Consumer Law Shopify Checkout: What Must Be Shipped

Shipping a UK consumer law Shopify checkout requires 14-day cancellation rules, pre-pay totals, and CMA review flags: verified August 2026.

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Security24 August 2026

Ecommerce Supply Chain Security: Production Checklist (2026)

Hardening ecommerce supply chain security: CycloneDX SBOM generation, GitHub dependency review, npm provenance, and Cosign release signing in 2026.

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Engineering21 August 2026

Algolia vs Typesense vs Meilisearch: Engine Choice (2026)

Algolia vs Typesense vs Meilisearch: compare indexing speed, typo tolerance, and self-hosted server costs from £40/month for retail catalogues in 2026.

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Engineering19 August 2026

Ecommerce CDP 2026: Segment vs RudderStack vs Snowplow

Segment vs RudderStack vs Snowplow for ecommerce CDPs in 2026: how warehouse-first event pipelines cut MTU fees and fix identity resolution.

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Shopify17 August 2026

Polaris Web Components Migration: Moving Off React (2026)

A practical Polaris web components migration guide for embedded apps: ditching the 1MB React bundle, handling CDN updates, and rewriting event listeners.

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Salesforce Commerce Cloud16 August 2026

Salesforce Commerce Cloud Pricing 2026: Editions and GMV

Salesforce Commerce Cloud pricing is quote-only. What Salesforce publishes: edition entitlements, Premier Success at 30% of net licence fees, and add-ons.

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Shopify12 August 2026

Shopify Checkout Sheet Kit: Native Mobile Guide (2026)

Implement the Shopify Checkout Sheet Kit for iOS and Android. Handle cart session lifecycle, Apple Pay wallet passthrough, and preloading rules in 2026.

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Shopify Plus10 August 2026

Shopify Age Verification Checkout: Apps vs Custom (2026)

Shopify age verification checkout in 2026: where the gate must sit, why homepage popups fail, and when an off-the-shelf app loses to a custom Function.

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BigCommerce7 August 2026

BigCommerce SEO: The Complete Guide for 2026

BigCommerce SEO optimization requires configuring canonical tags, XML sitemaps, 301 redirects via the Redirects V3 API, and multi-storefront hreflang in 2026.

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Shopify5 August 2026

Outgrown Shopify Theme: When to Build Custom in 2026

Facing app sprawl or slow INP? Key signs you have outgrown shopify theme architecture and need custom Liquid or Functions in 2026.

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Shopify Plus3 August 2026

Hydrogen Vercel Deployment: The Rebuild Guide (2026)

Evaluating a Hydrogen vercel deployment in 2026: decoupling from Oxygen cuts glue code across Next.js and Svelte with p95 edge latency under 100ms.

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Strategy31 July 2026

Restricted Product Ecommerce Platform Selection Guide (2026)

Choosing a restricted product ecommerce platform requires underwriting first — compare BigCommerce and Shopify setups for CBD and vape in 2026.

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AI Commerce29 July 2026

Generative Engine Optimization Ecommerce: 2026 Playbook

4 schema and feed optimizations for generative engine optimization ecommerce visibility — turn product catalogues into AI citations in 2026.

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AI Commerce28 July 2026

AI for SEO: What Google Allows and What Actually Works (2026)

AI for SEO on an ecommerce store: what Google allows, which AI SEO tools measure crawler access, schema and citations, and the codebase fixes that earn them.

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Strategy24 July 2026

Algolia Pricing eCommerce: The Real Cost Guide (2026)

Evaluating algolia pricing ecommerce plans in 2026 — how record limits and search request overages impact your monthly bill, plus open-source alternatives.

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Engineering22 July 2026

Shopify Ecommerce Platform Detection Methods (2026)

The core shopify ecommerce platform detection methods used in 2026 — from analyzing X-ShopId HTTP headers to tracking headless Storefront API endpoints.

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Shopify20 July 2026

Shopify Digital Products Licence Delivery: Build vs Buy (2026)

A guide to Shopify digital products licence delivery in 2026 — comparing off-the-shelf download apps vs custom Webhook-driven key generation engines.

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Shopify Plus17 July 2026

Shopify POS Omnichannel Inventory: Engineering Guide (2026)

Why native Shopify POS omnichannel inventory sync breaks at scale — how to design locations API buffers, click-and-collect, and OMS fallback in 2026.

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Shopify Plus15 July 2026

Klarna Clearpay BNPL Engineering: A UK Shopify Guide (2026)

Handling £100+ AOVs with Klarna and Clearpay — how to engineer robust capture, refund, and reconciliation pipelines on Shopify Plus in 2026.

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AI Commerce13 July 2026

pgvector eCommerce Product Search: Supabase Setup (2026)

How to build pgvector ecommerce product search with Supabase — bypass Algolia fees with a hybrid Postgres FTS and HNSW index architecture in 2026.

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AI Commerce12 July 2026

How to Improve Brand Visibility in AI Search Engines (2026)

How to improve brand visibility in AI search engines in 2026: three levers that win citations in ChatGPT, Perplexity and AI Overviews, plus a 30-day plan.

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Engineering11 July 2026

Royal Mail API Integration Shopify: UK Carrier Patterns (2026)

Royal Mail API integration for Shopify: Pro Shipping vs Click & Drop, plus Evri and DPD UK patterns for sub-200ms label flows and rate shopping (2026).

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BigCommerce10 July 2026

Shop Pay for BigCommerce: Engineering Decision Guide (2026)

Using Shop Pay for BigCommerce via the Wallet API — how off-Shopify checkouts handle UK instalments, real-time events, and asynchronous webhooks in 2026.

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Strategy8 July 2026

Is Volusion Still Good? Replatform Decisions (2026)

Is Volusion still good for £1M-£10M GMV stores? We analyze legacy API constraints, PCI DSS 4 risks, and migration costs to BigCommerce in 2026.

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Engineering6 July 2026

Stripe Connect: Engineering Marketplace Payments (2026)

Stripe Connect custom vs express models — how to build a multi-seller payment engine with 10p payouts and automated split logic in 2026.

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BigCommerce4 July 2026

BigCommerce SEO: Fixing Stencil & Crawl Traps (2026)

Resolving 3 BigCommerce SEO crawl traps in Stencil themes — how to fix duplicate faceted URLs and canonical drift for enterprise stores in 2026.

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Security1 July 2026

Strong Customer Authentication: 3DS2 Engineering Guide (2026)

How to stop strong customer authentication from destroying up to 15% of checkout conversions using advanced 3DS2 exemptions and modern gateway APIs in 2026.

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Headless29 June 2026

Headless CMS in Production: 3 Architectural Patterns (2026)

Choosing a headless CMS for £5M+ stores: a raw comparison of Sanity, Contentful, and Storyblok performance trade-offs in 2026.

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Engineering27 June 2026

Shopify Returns RMA Integration: Engineering Custom Flows (2026)

A production-grade shopify returns rma integration requires idempotent middleware — prevent inventory drift and stop double-refund bugs in 2026.

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Shopify Plus24 June 2026

Shopify Editions Spring 2026: Rebuilt Hydrogen & UCP

With 150+ updates, Shopify Editions Spring 2026 decouples Hydrogen from Remix and pushes B2B features to all plans — what engineers must build in 2026.

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Strategy24 June 2026

Is Your Magento 2 Upgrade Cost Worth It? A 2026 Guide

The real Magento 2 upgrade cost runs between £15,000 and £45,000 — why the recurring 2.4.7 patch cycle makes replatforming the smarter choice in 2026.

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Engineering22 June 2026

Klaviyo Deliverability Shopify: Engineering Guide (2026)

Optimise your klaviyo deliverability shopify setup with a 100% aligned domain — debug webhook latency and secure inbox rates — 2026 guide.

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Headless19 June 2026

Apple Pay Google Pay eCommerce 2026: Native vs Headless Guide

Native and headless wallet wiring contrasted — configure Apple Pay and Google Pay across Next.js and Liquid without slowing mobile checkout in 2026.

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Strategy18 June 2026

Magento Alternatives: Engineering Decision Guide (2026)

Magento 2.4.7 support ends 31 May 2027. The Magento alternatives a UK brand can move to: Shopify Plus, BigCommerce or composable, compared on vendor docs.

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Engineering15 June 2026

Supabase Shopify Backend: Side-Car Architecture (2026)

Why a headless build from £20K needs a dedicated DB — modelling custom schemas and real-time inventory with a Supabase Shopify backend in 2026.

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AI Commerce12 June 2026

Claude Fable 5 eCommerce: Hype vs Production (2026)

Claude Fable 5 eCommerce pricing of $10/$50 per million tokens presents a steep contrast — here is how to deploy this frontier model in production in 2026.

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Shopify Plus10 June 2026

Recharge vs Shopify Subscriptions: 2026 Engineering Guide

Recharge vs Shopify Subscriptions in 2026 — an engineering breakdown of API limits, payment token migrations, and the £100K GMV threshold where native fails.

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Shopify Plus10 June 2026

Magento to Shopify Migration: Replatform Timeline (2026)

A Magento to Shopify migration starts from £15K — how to execute the replatform, map EAV data, and preserve SEO rankings in 2026.

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BigCommerce8 June 2026

Volusion to BigCommerce Migration: Technical Guide (2026)

How to execute a Volusion to BigCommerce migration in 2026 without losing SEO equity. Learn to map legacy ASP URLs and clean V1 vs VOLT data.

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Headless5 June 2026

Shopify Hydrogen Blue Green Deploy: Zero-Downtime Guide (2026)

Oxygen vs Vercel edge latency comparison — how to run a shopify hydrogen blue green deploy with a 10% canary split for zero-downtime releases in 2026.

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Engineering3 June 2026

GitHub Actions eCommerce CI CD: Production Blueprints (2026)

A 3-step github actions ecommerce ci cd setup blocks credential leaks — learn how we implement OIDC and Shopify CLI v4 for resilient deploys in 2026.

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BigCommerce2 June 2026

BigCommerce 2026 Pricing Changes: New Plans, GMV Caps & Fees

BigCommerce's June 1 2026 update renames every plan, cuts GMV thresholds, and adds a 2.0%/1.0%/0.6% Open Payment Provider fee. The real cost and what to do.

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Engineering1 June 2026

GA4 BigQuery Export Ecommerce: Production Pipeline (2026)

A production-grade ga4 bigquery export ecommerce pipeline processing over 10M events — how we bypass daily limits and partition datasets in 2026.

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Security29 May 2026

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.

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Strategy27 May 2026

Adyen vs Stripe UK: Fees, Pricing and When to Switch (2026)

Adyen vs Stripe UK fees: Stripe 1.5% + 20p blended against Adyen Interchange++ plus 0.60%, fraud tooling and the 0.20% Shopify Plus fee. Verified October 2026.

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Headless25 May 2026

Shopify Hydrogen Winter 2026: Production Migration Guide

Migrating from Remix to React Router v7 in Shopify Hydrogen Winter 2026: our technical playbook for dependencies, customer authentication and agentic commerce.

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Shopify24 May 2026

Shopify Customer Accounts API: Passwordless in Production (2026)

A 35% drop in login friction with the shopify customer accounts api — how to implement passwordless login and UI extensions in 2026.

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Engineering22 May 2026

Server-Side Tracking on Shopify Plus: GTM + Stape (2026)

Server-side tracking on Shopify Plus in 2026 — GTM server container, Stape vs self-hosted, Meta CAPI, Google Ads enhanced conversions migration steps.

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Engineering22 May 2026

Shopify CLI 4.0 Breaking Changes: Engineering Migration (2026)

Shopify CLI 4.0 brings SemVer, auto-upgrades and the --force flag removal. CI/CD migration steps, the five removed commands and what 4.4 to 4.7 added.

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Product22 May 2026

Anchor Loyalty is Live on the Shopify App Store (2026)

Anchor Loyalty & Rewards is now on the Shopify App Store. Points, VIP tiers, two-sided referrals, and a signed API for Hydrogen and headless stores.

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Security21 May 2026

GitHub VS Code Extension Breach 2026: Engineering Response

GitHub's May 2026 internal breach started with a poisoned VS Code extension on an employee device. Engineering response and policy lessons for teams.

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Engineering18 May 2026

Storefront API Cart Warnings: Handling Location Restrictions (2026)

The new PRODUCT_UNAVAILABLE_IN_BUYER_LOCATION warning code — handle cross-border cart state without leaking conversion — required for headless builds in 2026.

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BigCommerce16 May 2026

PIM for BigCommerce: Integration Patterns at 50K+ SKUs (2026)

How to integrate Akeneo, Plytix, Pimcore, and Salsify with BigCommerce in 2026 — handling delta syncs, MSF attribute mapping, and rate-limit recovery.

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Engineering14 May 2026

Shopify GraphQL Admin API: Production Rate Limit Strategy (2026)

Shopify GraphQL rate limits in 2026: 100 points/second on Standard, 1,000 on Plus, throttleStatus-driven retries and Bulk Operations. Verified September 2026.

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Engineering13 May 2026

Shopify Dropshipping at Scale: When DIY Apps Break (2026)

The 3 breaking points of Shopify for dropshipping — why DSers and Spocket drop orders at 500/day — and how to build custom middleware in 2026.

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Agentic Commerce13 May 2026

Shopify Quietly Auto-Shipped /llms.txt, /agents.md and /.well-known/ucp — Engineering Override Guide (2026)

Shopify now ships /llms.txt, /agents.md and /.well-known/ucp by default. Engineering guide: defaults, overrides via templates/agents.md.liquid, Markets fixes, CI.

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Engineering11 May 2026

Shopify AI Toolkit in Production: 19 Skills and Safe Execution (2026)

The 19 skills in the Shopify AI Toolkit — how to safely scope the --allow-mutations flag and run Claude Code against live stores — 2026 engineering guide.

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BigCommerce11 May 2026

BigCommerce Web Development: Stencil vs Catalyst Costs (2026)

BigCommerce web development decision tree — when Stencil themes win, when Catalyst makes sense, and what a headless build costs in 2026, from £20K.

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Headless9 May 2026

Hydrogen MCP to UCP Migration: Production Cutover Guide (2026)

Storefront Catalog MCP became UCP on 22 April 2026, and the catalog and cart tools on /api/mcp have now been removed. Migration steps for Hydrogen storefronts.

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Shopify Plus8 May 2026

What is Shopify Plus: UK Engineering Decision Guide (2026)

What is Shopify Plus? A direct breakdown of UK pricing (typically £1,800/month), the 11 million Wasm instruction limit, and when the platform pays off in 2026.

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AI Commerce5 May 2026

OpenAI Privacy Filter: Production Implementation Guide (2026)

OpenAI Privacy Filter in a Shopify stack: deploy the open-weight PII redaction model to mask customer data before it reaches a cloud LLM, UK GDPR in mind.

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AI Commerce5 May 2026

Introducing Workspace Agents in ChatGPT: Commerce Implications (2026)

Consumer agentic checkout stalled, but internal AI workers are here. How to safely connect ChatGPT workspace agents to your Shopify Plus Admin API via MCP in 2026.

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AI Commerce1 May 2026

Introducing GPT-5.5: Engineering Agentic Commerce (2026)

Introducing GPT-5.5 and the Agentic Commerce Protocol — how 1M-token context windows turn ChatGPT into a native checkout channel for Shopify Plus — 2026.

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Engineering30 April 2026

Shopify Dev Assistant in Production: Engineering Workflow Efficiency

An engineering perspective on integrating the Shopify Dev Assistant and MCP server into production teams to streamline Shopify Functions and Polaris development.

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Automation27 April 2026

Shopify Flow AI Assistant Prompts That Work (2026 Guide)

Copy-paste prompts for the Shopify Flow AI assistant (email chains, VIP tagging, fraud holds), plus the flowTriggerReceive pattern for AI agent handoffs.

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Headless26 April 2026

Catalyst vs Hydrogen 2026: Next.js vs React Router Compared

BigCommerce Catalyst (Next.js) vs Shopify Hydrogen (React Router): 2026 performance, build cost and hosting trade-offs, and which headless framework fits your build.

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Engineering22 April 2026

Scaling Shopify Storefront MCP in Production

Auth, caching, rate-limiting, and multi-tenancy patterns for a Shopify Storefront MCP server — what scales, what breaks under bursty agent traffic.

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Engineering17 April 2026

Shopify Functions in Production 2026: 5 Patterns That Scale

Five Shopify Functions patterns that survived Black Friday: binary testing, metaobject access, the 11M instruction budget, cart-transform caching, deploys.

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AI Commerce17 April 2026

Agentic Commerce Protocols: ACP, MCP, UCP

ACP, MCP, and UCP — the three protocols that now mediate how AI agents buy from Shopify, BigCommerce, and enterprise stores. What each is and what to implement.

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AI Commerce17 April 2026

Shopify MCP Server: Production Implementation Guide (2026)

Shopify MCP server guide for 2026: UCP catalog, cart and checkout at /api/ucp/mcp, Customer Accounts and Dev MCP, a CLI test, and when to build your own.

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AI Commerce16 April 2026

Optimising Shopify for AI Search: ChatGPT & Perplexity

ChatGPT Shopping, Perplexity Shop, and Google AI Mode recommend products directly. The structured data, feeds, and on-page signals that move the needle in 2026.

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Security15 April 2026

Security Headers for eCommerce: The Checklist

The 9 HTTP security headers every eCommerce store needs in 2026 — CSP, HSTS, COEP, COOP, and the Magecart-specific configs that block live skimmer attacks.

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Performance14 April 2026

Mobile PageSpeed Fixes for Slow eCommerce Stores

Most eCommerce stores score under 50 on Google's mobile PageSpeed test. The 12-step fix list we use to consistently hit 90+ on Shopify and BigCommerce in 2026.

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Shopify Plus13 April 2026

Shopify Plus Official UK Pricing 2026: From £1,800/mo Real Costs

Shopify Plus pricing for UK 2026: from £1,800/month, the variable platform fee, apps, retainer and the year-one costs the official price list does not show.

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Salesforce12 April 2026

Salesforce Commerce Cloud vs Shopify Plus

Salesforce Commerce Cloud vs Shopify Plus: published Plus pricing against quote-only SFCC licensing, build cost, SFRA vs Functions and a decision framework.

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Engineering11 April 2026

Shopify App Development Cost in 2026: What Drives the Price

Shopify app development cost and pricing: custom apps start from £4,000. Custom vs App Store apps, the plan limits that change the build, and how to get a quote.

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NetSuite10 April 2026

NetSuite SuiteCommerce: Connecting Store to ERP

For businesses where inventory accuracy and financial integration matter more than a pretty checkout. Here's what SuiteCommerce actually does well.

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Integration9 April 2026

Integrating Shopify with NetSuite: A Practical Guide

The most common integration we build. Here's how to get orders, inventory, and customer data flowing reliably between Shopify and NetSuite.

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Headless8 April 2026

Shopify Hydrogen 2.0: Is It Finally Production-Ready?

Hydrogen 2.0 in 2026 — what’s mature, what still bites, and whether the React Router + Oxygen stack is finally ready for production Shopify Plus storefronts.

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Compliance5 April 2026

European Accessibility Act: eCommerce Compliance

The European Accessibility Act is now in force. Here's what eCommerce stores need to fix for compliance and why accessibility is good for business.

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Shopify2 April 2026

Building Subscriptions on Shopify: What Actually Works

A practical guide to building subscription commerce on Shopify — comparing apps, custom builds, and the trade-offs of each approach.

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Automation30 March 2026

Shopify Flow: Beyond the Basics

Advanced Shopify Flow automation patterns that replace expensive apps and save hours of manual work every week.

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BigCommerce26 March 2026

BigCommerce Multi-Storefront: Architecture Guide

BigCommerce Multi-Storefront runs multiple stores from one back end: shared catalogue and stock, with category trees, prices, currencies and logins per channel.

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Shopify22 March 2026

Shopify Variant Limits: 2,048 Variants, 3 Options, Real Fixes

Shopify now allows 2,048 variants per product but still caps options at three. When combined listings, metafields or a configurator make sense.

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UX20 March 2026

Shopify Search at Sub-100ms: Algolia vs Search & Discovery (2026)

eCommerce search under 100ms — Algolia config, Shopify Search & Discovery API limits, 1536-dim vector embeddings, and buy-vs-build decision points for 2026.

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Automotive18 March 2026

Year/Make/Model Filtering on Shopify for Auto Parts (2026)

Build Year/Make/Model fitment filtering on Shopify with metaobjects and metafields — the data model, search layer, ACES/PIES, and what it costs. A 2026 engineering guide.

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Architecture15 March 2026

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.

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AI8 March 2026

AI Search Isn't Magic: What Actually Works

We've tested plenty of AI search tools. Here's what we've learned about what actually improves eCommerce search and what's just expensive hype.

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Shopify28 February 2026

Shopify Checkout Extensions: What You Can Do Now

The old checkout.liquid is gone. Here's what Checkout Extensibility actually lets you do, with examples from real projects.

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Strategy20 February 2026

Selling Internationally: Markets vs Multi-Store

Should you use Shopify Markets or run separate stores for each country? Here's how to decide based on your actual situation.

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Strategy12 February 2026

BigCommerce or Shopify? How to Actually Decide

We work with both platforms daily. Neither is better—they're different. Here's how to choose the right one for your situation.

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Performance5 February 2026

Your Shopify Store Is Probably Slow

Most Shopify stores we audit have the same problems: too many apps, bloated themes, and unoptimised images. Here's how to fix them.

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Architecture28 January 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.

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Social20 January 2026

TikTok Shop and Shopify: What Brands Need to Know

TikTok Shop is growing fast. Here's what we've learned about integrating it with Shopify and whether it's worth the effort.

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B2B12 January 2026

Shopify Plus B2B: Features by Plan and When You Need Plus

Shopify B2B works without Plus on Basic, Grow and Advanced. See which Shopify Plus B2B features justify the upgrade and what still needs custom work.

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Migration5 January 2026

Ecommerce Platform Migration Checklist (2026)

A six-phase ecommerce platform migration checklist built on Google's site move guidance: discovery, data, redirects, integrations, cutover and the 90 days after.

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Product20 December 2025

Building Anchor: What We Learned About Loyalty Apps

Most loyalty apps feel bolted-on. We spent six months figuring out how to build one that actually fits into the Shopify experience.

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Strategy10 December 2025

When Does Shopify Plus Actually Make Sense?

When does Shopify Plus actually make sense? The Plus-only capabilities, an honest cost breakdown, and the revenue band where the upgrade pays back. 2026 guide.

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