Writing
Design vocabulary, reference workflows, and how to write rules an agent will still be following forty files later.
Most CLAUDE.md and .cursorrules files get ignored by the third file. The ones that hold have a property in common, and it isn't length.
Make it look like that fails because that is a whole site. Naming the specific part you want is the entire skill.
Every designer works from references. The line between borrowing and copying is real, and it's easier to stay on the right side of it than people assume.
Hex roles, type scales, spacing systems and radii — what the words mean and why an agent needs them, for people who never had to name any of this.