Source Intelligence
Follow Discord

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 v2.1.238 Home All releases ←olderv2.1.237 v2.1.239newer→
Claude Code v2.1.238

Artifact instructions now cover live data, actions and file hand-off

You'll notice
Useful2 Signal4
Artifacts

Artifacts now get guidance on using live data and actions, loading a capabilities skill first.

What

The instructions Claude follows when building an artifact gained a section on what to do when an idea needs real data or real actions, and it tells Claude to load a named capabilities skill before relying on any of them.

Details
  • The new section is headed ## When the idea needs real data or real actions.
  • It names three things as per-user runtime capabilities rather than things the page can just do: live or connected data, acting on the user's behalf from the published page, and handing the viewer a file.
  • Those capabilities are described as granted by the control plane and declared at publish time, so they are decided outside the artifact's own code.
  • This is prompt text assembled into the artifact instructions, not a gated feature.
Evidence

This is wired fidelity.

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.238 →