Sen Lin, writing in UX Collective, has a useful reference for designers who want Claude Code to fit their workflow instead of acting like a generic engineering agent:

Claude Code is an agent, and an agent is only as good as how you configure it. That’s the part worth paying attention to as a designer: Out of the box it leans engineering, but you can set it up to fit how you actually work — to understand design, respect your workflow, and carry the right capabilities — so it produces better results, faster.

A technical stack is the set of technologies you decide on before writing a line of application code. A design stack is the same idea, applied to Claude Code: the brief, the design knowledge, and the tools you hand the agent upfront.

The useful move is treating Claude Code setup as a design operation, not a prompt-writing trick. Give it a project brief, a design-system guide, and the right tools before it starts touching the work.

If CLAUDE.md is the brief, DESIGN.md is your design system translated into something an agent can read and obey. It’s a format specification that describes your visual identity to a coding agent: the exact values, and the reasoning behind them.

The file works on two layers, and both matter.

The first is machine-readable design tokens, written as YAML front matter — the exact values, so the agent never has to guess what gray-500 resolves to or which surface color a modal should use: […] The second is human-readable design rationale, written as prose — the part that explains why a value exists and how to apply it. Tokens tell the agent what primary is. The prose tells it there should never be more than one primary button per view, that a primary action is always paired with a neutral or subtle one for cancel, that button width is set by the parent and never hardcoded.

The tool/instruction split is the part worth saving:

MCP gives the agent access to tools.

Skills give it the knowledge to use those tools well.

Where MCP is access, a Skill is a markdown-based guide that teaches Claude how to perform a specific task in a specific way. It’s a set of instructions, scripts, and resources — a training manual that keeps the agent from wandering down expensive detours and burning tokens on the wrong approach.

Good checklist. The designer’s job is not just to ask Claude Code for UI. It is to onboard the agent into the product, the design system, and the working style before generation begins.