Group of 4 You'll notice
Artifacts can now carry a plain-word icon field alongside their favicon, and publish/deploy retries handle any rejected field, not just one
What
- Artifacts can now include a new
iconfield: a single short generic word (e.g. "chart", "calendar") meant as a plain page-type signifier, separate from the existing favicon. It's persisted across redeploys like the favicon, and is explicitly ignored on artifacts created from an Artifact type. - When publishing an artifact, if the publish endpoint rejects the request because of an unknown
iconordeadlinefield, Claude Code now automatically strips just that field and retries, instead of failing outright. This generalizes what used to be a retry that only handled a rejecteddeadlinefield, so the retry loop now keeps stripping whatever field gets rejected until nothing more is rejected. - The notice shown when extra fields are supplied on an Artifact-type create (which are ignored) now refers to the favicon/description as starting from "the type's ... emoji" instead of "icon", to avoid confusion with the new
iconfield.
Why
This gives artifacts a lightweight, generic type indicator distinct from their favicon, while making publish/deploy more resilient to servers rejecting fields Claude Code doesn't yet know are unsupported, and avoids the two similarly-named concepts (favicon vs. the new icon) being confused in user-facing text.
Names in the bundleicon
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Added since
A small documentation edit on Use Claude Code in VS Code touched a line naming icon after this was published.
* **Prompt cache clock**: a clock icon next to the context indicator estimates how much time the conversation's [prompt cache](/docs/en/prompt-caching) has left before it expires. It counts down from the cache's five-minute or one-hour [li…vs-code see the edit
Confirmed since
Anthropic's documentation has since written up icon, on Extensions Overview.
<Card title="modelcontextprotocol/ext-skills" icon="github" href="https://github.com/modelcontextprotocol/ext-skills">extensions/overview see the edit
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agrees
Anthropic's documentation has since written up icon, on Extensions Overview.