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 v2.1.321,
ImprovementsSection of the release
What
When Claude uploads an .xlsx spreadsheet as an asset for an artifact, the result it gets back now includes a warning. It says:
The file is only ever served as a download.
While a copy is stored, the artifact cannot be made public or shared outside your organisation, because the content scan cannot read .xlsx files.
Why
The warning steers Claude to delete .xlsx assets once they are no longer needed, so a leftover spreadsheet does not quietly stop you from sharing the artifact.
