You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.232,
ImprovementsSection of the release
What
Claude must load the design skill before writing an artifact file whether the output is HTML or Markdown, and choosing the format is treated as part of the design decision rather than a shortcut. Workshop documents remain the one exception.
Evidence
Format is part of that decision: choose Markdown because the deliverable calls for it, never for speed.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.