Journal
Ce que nous apprenons en chemin.
Des notes de terrain sur la recherche utilisateur, le design d'interface et la mise en production. Pas de tribune, pas de tendance : ce qui marche et ce qui rate.
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English Only Content
Offline on Purpose, and Saying Why
On 21 October 2026, governments, hospitals and even cybersecurity agencies took their own websites offline before anyone had broken in. The flaw was in PHP. The harder problem was explaining a deliberate outage to the people on the other side of it.
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English Only Content
What AI Changes About User Research, and What It Does Not
Generative models are often presented as a substitute for studying real people. The published evidence points the other way, and suggests research matters more once a product stops behaving the same way twice.
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English Only Content
Nobody Touches Production, Including the Agent
Coding agents did not create the problem of unsupervised access to production. They made an old discipline urgent, and they made one of its weakest links, the exception path, worth rebuilding properly.
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French Only Content
Cinq utilisateurs suffisent (et pourquoi on en teste quand même huit)
La règle des cinq participants est juste, mais on la cite presque toujours de travers. Ce qu'elle dit vraiment, et le jour où elle ne s'applique pas.
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French and English
Le métier que personne ne facture
Beaucoup de décideurs pensent qu'un projet mené de bout en bout suppose plusieurs intermédiaires. La recherche en économie de l'externalisation répond quelque chose de plus précis, et de moins confortable pour tout le monde, nous compris.
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English Only Content
Two Thousand Faces Every Morning
A field report from a Shanghai construction site, where augmented reality glasses had to identify up to two thousand workers against a government database before the day could start. The hardware turned out to be the easy part.