Working notes from the practice. Published when something earns a footnote.https://lucascufre.design/en-ushttps://lucascufre.design/field-notes/alert-systems-at-scale/https://lucascufre.design/field-notes/alert-systems-at-scale/Six months designing alerts for an industrial monitoring platform taught me the failure mode the spec couldn't see: alerts and silencing share the same off-switch, and once silenced, the system is structurally lying to itself. Mon, 04 May 2026 00:00:00 GMTfield-notesalertsindustrial-monitoringux-designsystem-designhttps://lucascufre.design/field-notes/what-the-next-person-inherits/https://lucascufre.design/field-notes/what-the-next-person-inherits/The PM role I left had 650 documents prepared for whoever came next. None of them said what the team would actually need. On transitions, inherited substrate, and what documentation can't catch. Mon, 04 May 2026 00:00:00 GMTfield-notestransitionsproduct-managementorganizational-designleadershiphttps://lucascufre.design/field-notes/four-kinds-of-user/https://lucascufre.design/field-notes/four-kinds-of-user/For years I treated "user" as a uniform noun. The data didn't. Four kinds of user — First-Level, Second-Level, Passive, Hostage — and what each one's feedback actually means. Sun, 05 Dec 2021 00:00:00 GMTfield-notesuser-researchtaxonomyux-design