Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.187 Home All releases olderv2.1.186 v2.1.190newer
Claude Code v2.1.187

Artifact design skill — comprehensive design guidance

The artifact-design skill has been expanded with detailed design principles covering typography, layout, color, copy writing, UI design, and an editorial workflow for higher-stakes creative pages.

Details
  • Guidance covers: honoring existing design systems, typeface pairing (with @font-face data URIs since CDNs are blocked), layout with flex/grid, CSS cascade specificity, writing copy, structural vs. decorative elements, and avoiding AI-generated design clichés
  • Adds an explicit process: sketch a compact token system (color, type, layout) before writing code
  • Adds an "editorial" mode for landing pages, games, and apps — with instructions to make opinionated calls and take one real aesthetic risk
  • Description updated from "Design guidance for Artifact pages" to "Design guidance and fundamentals for Artifacts"
Evidence

Skill content replaced (search for "Approach this as the design lead at a small studio")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.187 →