The Cosmy blog
Guides, data and field notes on how AI assistants, shopping agents and marketplaces are changing the way products get found, compared and bought. From Amazon to every new place people shop.
FeaturedAlexa for Shopping and CoSMo
The field-level spec for Amazon's AI assistant: the 75-character title cap, item highlights, and which structured attributes get read first.
Guillaume Jacobs · 12 min read
Alexa for Shopping and CoSMoHow-to
Amazon already summarizes your reviews for shoppers. Diff that summary against your listing and fix the gaps Alexa for Shopping can see.
Guillaume Jacobs · 5 min read
Beyond AmazonGuide
Amazon, Walmart, ChatGPT, Gemini, Perplexity. What each AI surface reads to pick a product, and which of your work transfers between them.
Guillaume Jacobs · 10 min read
Operating modelGuide
The weekly cadence for running AI visibility across 20 client accounts: who does what, what gets checked, what gets reported, and what to skip.
Guillaume Jacobs · 10 min read
Beyond AmazonHow-to
Already optimized for Alexa for Shopping? Here is what carries over to Walmart Sparky, field by field, from Walmart's own seller docs.
Guillaume Jacobs · 6 min read
Beyond AmazonHow-to
Every guide says add Schema.org markup. Most assumes you own the site. Here is what actually applies when your product lives on a marketplace.
Guillaume Jacobs · 6 min read
Beyond AmazonComparison
OpenAI and Stripe shipped ACP. Google shipped UCP. What each one does, how they differ, and what a seller has to do to be eligible for either.
Guillaume Jacobs · 7 min read
AI shopping visibilityHow-to
There is no position to track in an AI answer. Here is the fixed-prompt method: what to ask, how often, what to count, and what the number means.
Guillaume Jacobs · 6 min read
AI shopping visibilityGuide
Where does your product show up when an AI decides what to recommend? The surfaces that pick products, what each one reads, and how to measure it.
Guillaume Jacobs · 12 min read
Alexa for Shopping and CoSMoHow-to
Amazon capped product titles at 75 characters on 27 July 2026. What the rule says, which categories are exempt, and where the lost detail goes.
Guillaume Jacobs · 4 min read
Alexa for Shopping and CoSMoNews
Amazon retired the Rufus name on 13 May 2026. What actually changed, what did not, and what sellers should do differently. Dated and sourced.
Guillaume Jacobs · 3 min read
Alexa for Shopping and CoSMoGuide
CoSMo is Amazon's commonsense knowledge graph. The 15 relations it maps, what a real listing misses, and how to write for them.
Guillaume Jacobs · 11 min readAlexa for Shopping and CoSMoGuide
The field-level spec for Amazon's AI assistant: the 75-character title cap, item highlights, and which structured attributes get read first.
Guillaume Jacobs · 12 min read