Will Newton: turn design judgment into an agent-readable harness

Will Newton outlines a design harness: a small, versioned setup where a coding agent builds against a design.md, selected production components, real product screenshots, and a private preview link. Instead of prompting from a blank canvas, the workflow gives the agent reference material and makes each revision inspectable. Why it matters: A coding agent can produce a convincing first pass without knowing a team's design decisions. Capturing rules, examples, and feedback in reusable files turns subjective corrections into constraints that can travel across tasks and teammates.

Try this: For one recurring interface task, inspect a design.md with five concrete rules, two production components, and a screenshot of the live surface. Run the agent once, compare its output against the screenshot, and record each mismatch in the file before the next task.