build-design
Build design
This skill turns a design into code that matches it. It reads the design at its source, builds with what the project already has, then compares the result against the design before calling it done.
The design decides. Values come from the design file, never from your taste or a pattern you liked elsewhere. A change the design does not show is a deviation, and a deviation is the user's call.
It owns no domain rules. Where the design breaks one, build it as designed and report the conflict with its owner. Contrast is a requirement in better-accessibility and a measurement in better-colors. Focus and semantics are better-accessibility, type is better-typography and spacing and structure are better-layout. Palette is better-colors, copy is better-writing and surfaces, icons and motion are better-ui. Reviewing finished work is interface-review, exploring alternatives is variant and stress testing a component is break.
1. Read the design at its source
A Figma link means the Figma MCP. Search the available and deferred tools for figma before saying it is unavailable, since the server often sits under a name you did not expect. A server that lists only an authenticate tool is connected but signed out, so ask the user to authenticate. With no Figma tool at all, ask the user to connect one, and do not build from memory or guesswork meanwhile. figma.md holds which tools to call and what each returns.
A screenshot or exported image has no values to read. Sizes are ratios to the capture, so state the scale you assumed and treat every measurement as an estimate. Ask for the Figma link when one exists, since it replaces the whole estimate.
Scope the run to the frames named. Frames that show the same thing at different widths are one piece at several breakpoints, not separate pieces.
This step is done when you hold a screenshot of every frame in scope and its values for spacing, size, radius, color, type and the components used. From a Figma file they are exact. From an image they are estimates at the scale you stated.