You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.221,
ImprovementsSection of the release
What
The prototyping skill prompt now includes a section pushing Claude toward live or connected data and toward acting on the user's behalf, rather than mocking things out, when building prototypes.
Details
The section instructs Claude to load the artifact-capabilities skill to check which capabilities the user actually has.
If a needed capability is not covered, the guidance is to stay fully static rather than fake it.
Gated on the artifact capabilities schema: the section is appended only when the artifact schema exposes a "capabilities" field, otherwise the prompt is unchanged.
Evidence
## When the idea needs real data or real actions
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
