Use when designing, building, writing, OR validating any nightshift interface, marketing page, doc, slide, mock, prototype, or brand asset — covers the night-sky dark theme, terracotta accent, Inter + JetBrains Mono type, design tokens, React UI-kit components, the technical no-hype brand voice, and a runnable adherence gate (token-drift + WCAG-AA contrast + lint). Trigger on "nightshift", "design with the brand", "terminal/pipeline UI", "ships while you sleep", "check brand adherence", "validate nightshift design".