Build, design, edit, or read designs in Figma through the Figma MCP (the cloud connector: use_figma plugin-API calls + get_screenshot feedback loop), and do design-to-code. Use whenever the task is to create or change a Figma file, mock up a UI / logo / infographic / design system, build Figma styles or components, or pull a Figma design into code. Encodes the hard-won rules: server-side font limits, load-before-edit, page/layer access, geometry and shear math, styles + components, and organize-as-you-go layer hygiene so the file is clean by construction, not cleaned up after.