Artifact file lookups now also check a project/ prefix, and saved design tokens can be installed directly
When Claude Code looks up type or design-system files for an Artifact (things like README.md or tokens.json), it now checks both the plain path and a project/-prefixed version of that path.
It also lets the model install a previously-saved design system directly: instead of re-reading and re-typing the file's contents, it can send the saved tokens.json (and, for the 'design' type, bundle.js, bundle.css, and index.d.ts) as a files entry that just points from a path with a contentType. There's also special handling for the 'slides' type's designSystems unpinned flag.
This avoids unnecessary re-reading and retyping of design-system content that's already saved, and makes file lookups more resilient by checking an additional common path location.