Serhii Nezhyhai — Notes https://portfolio.nezhihai.workers.dev/notes Write-ups on Shopify development, performance and AI commerce. en What a one-hour prototype is for https://portfolio.nezhihai.workers.dev/notes/a-one-hour-fog-prototype https://portfolio.nezhihai.workers.dev/notes/a-one-hour-fog-prototype A single HTML file that fakes volumetric fog on a storefront, built in an hour with an AI assistant, to answer one question before committing any real time. Thu, 27 Aug 2026 00:00:00 GMT A vision model as a catalogue QA pass https://portfolio.nezhihai.workers.dev/notes/catalog-image-qa-with-vision https://portfolio.nezhihai.workers.dev/notes/catalog-image-qa-with-vision A small script that checks the product images on your best sellers for blur, low resolution and wrong-language overlay text, and hands you a report instead of a fix. Mon, 17 Aug 2026 00:00:00 GMT A storefront assistant should read, not remember https://portfolio.nezhihai.workers.dev/notes/grounding-a-storefront-assistant https://portfolio.nezhihai.workers.dev/notes/grounding-a-storefront-assistant The rule that kept the Informatica chat agent honest — anything a shopper acts on is fetched live through a tool, never produced by the model. Mon, 20 Jul 2026 00:00:00 GMT Measure the change, then keep it or revert it https://portfolio.nezhihai.workers.dev/notes/measure-then-keep-or-revert https://portfolio.nezhihai.workers.dev/notes/measure-then-keep-or-revert A theme performance log is only useful if it has as many reverts in it as wins. Half the value is writing down what didn't work and why. Thu, 11 Jun 2026 00:00:00 GMT