Four principles guide the system: data first, chrome second (every non-data pixel competes with data — hence a monochrome palette with surgical color accents: red for commands, green for values, blue for flags, amber for users); errors as first-class affordances that teach the grammar instead of apologizing; progressive disclosure through syntax, where novices run bal and power users script it into a cron job; and confirmation as a trust feature, not friction — destructive actions never execute silently. Deliberate exclusions: no dashboards, no default notifications, no spending psychology nudges, no gamified streaks, no in-UI upsell.