Insights, engineered.

Technical deep-dives, AI strategy, and engineering perspectives from the team building autonomous systems.

Sep 4, 2026 Headless Commerce

Shopify SimGym: What AI Shopper Simulation Can and Cannot Test (2026)

Shopify SimGym, part of the Winter 2026 Edition, runs AI shoppers through your storefront to simulate buyer behavior before you push changes live. The AI shoppers browse products and collections, use navigation and search, add items to the cart, and report the friction they hit, and they are trained on the behavioral data behind billions of Shopify purchases. It sounds like a way to test your store without waiting for real traffic, and for themed stores it is a useful directional screen. The catch that matters for anyone reading this on the headless side is that SimGym operates on Shopify themes, and a headless storefront is not a theme. This post covers what SimGym actually tests, what it explicitly does not, and how headless teams should think about pre ship validation when the tool cannot see their front end.

Sep 4, 2026 Headless Commerce

Shopify Storefront API 2026-07: Breaking Changes and the Headless Migration (2026)

Shopify's Summer 2026 edition, codenamed Compass, shipped 65 updates, and the one that lands on every headless team is Storefront API version 2026-07 with breaking changes to the cart and product query structures. On a themed Shopify store these version bumps are invisible; the platform absorbs them. On a headless build, where your storefront talks to the Storefront API directly, a breaking change to the query shapes you depend on is a scheduled outage if you ignore it. Shopify runs a quarterly versioning cadence and supports each version for a fixed window, so 2026-07 is not optional, it is a migration with a deadline attached. This post covers what changed in the cart and product queries, why headless builds are uniquely exposed to Storefront API versioning in a way themed stores are not, and how to run the migration behind a version pin so you upgrade on your schedule rather than on an outage.

Aug 27, 2026 AI Infrastructure

The State of AI Coding Agents (August 2026): Adoption, Terminal-Bench, and the Stack Devs Actually Run

The AI coding agent field in August 2026 has stopped being about who has the smartest model and started being about who fits the way developers actually work. The adoption data tells the story: awareness of Codex climbed from 27 percent of developers early in the year to 65 percent by mid year, while GitHub Copilot's share slid from 29 percent a year ago to 21 percent, according to JetBrains research. On raw capability the top agents are bunched together, with Terminal-Bench 2.1 putting GPT-5.6 Sol, Claude Opus 5, and Grok 4.6 all within roughly a point of each other. When the models are this close, the differentiator is workflow shape, not benchmark position. This post lays out where adoption is heading, what the benchmarks do and do not tell you, and the multi tool stack most working developers have converged on, because almost nobody uses just one agent anymore.

Aug 27, 2026 AI Infrastructure

GPT-5.6 Sol: Pricing, Terminal-Bench Numbers, and Where It Actually Wins (2026)

GPT-5.6 Sol is the flagship tier of OpenAI's GPT-5.6 family, released on July 9, 2026 alongside Terra and Luna. It ships a 1,050,000 token context window and, after OpenAI cut prices on August 22, sits near 4 dollars per million input tokens and 20 dollars per million output tokens. On Terminal-Bench 2.1, the agentic coding benchmark, it lands at the very top of the public leaderboards, though the exact number swings with the harness and the effort setting used. This post skips the launch-day cheerleading and treats Sol as a procurement decision: what it costs in production, what the benchmark numbers actually say once you account for effort tiers, and the specific workloads where it beats the cheaper Terra and Luna tiers or a rival like Claude Opus 5. If you are choosing a default model for an agent, the interesting question is not the headline score, it is the cost per solved task.