For controls engineers who program the OBELISK: build strategies block-by-block in the browser wiresheet with live values, bind discovered I/O, organise a site with folders and naming that lasts, engineer honestly for dead sensors with null, master point paths and pickers, capture the semantic model that pays at handover, engineer alarms, histories and schedules with discipline, and package proven work as Program Catalogue templates with the .sgo backup as the engineering artefact. Everything happens in a web browser — nothing to install.