What
- A new
slidesartifact type stores each slide as its own HTML file (project/slides/<id>.html), with aproject/deck.jsonindex describing the deck's order, sections and fonts. - A new
designartifact type stores each artboard as its own file underproject/, with aproject/canvas.jsonindex. - The instructions Claude Code gives the model for these file-based types were rewritten to explain that content goes into files under
project/, tracked with acreatedOnFilesmarker object, and published together in one step.
Why Previously, artifact types like these worked through an older "store document" model. Storing slides and designs as individual files with an index lets Claude Code build and update multi-file artifacts (a slide deck, a set of design artboards) more directly, and lets the model describe changes file-by-file instead of as one document blob.
Names in the bundleslides
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 Commands touched a line naming slides after this was published.
| `/design [brief]` | **[Skill](/docs/en/skills#bundled-skills).** Draft UI mockups, screen flows, landing pages, or posters as artboards on one canvas, published as a Claude Design [artifact](/docs/en/artifacts#draft-a-design-canvas), for…commands see the edit
Confirmed since
Anthropic's documentation has since written up slides, on Create custom skills.
3. For slides, start from `assets/slide-template.md`.skills/how-to 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 slides, on Create custom skills.