QUALITY.md

QUALITY.md: an open format to help humans and agents maintain and continuously improve the quality of the systems they ship, operate, and maintain by making easier to attend to, align on, and care for what matters most. QUALITY.md is an open format with a quality model in the YAML frontmatter: the quality characteristics (security, accessibility, test quality, etc.) and their quality requirements (docs, guides, sensors, etc) and the context for why these matter in the markdown body.