You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.268,
ImprovementsSection of the release
What
When an Artifact (a piece of generated content Claude Code manages, like a shared document or canvas) declares a shared store, Claude Code gives the model guidance on how to write to it. That guidance now takes into account whether the artifact's type actually declares any endpoints (ways to write to the store). If it doesn't, the model is now told plainly that no store-write call is available for that type, rather than being pointed toward run_script as a possible option regardless.
Why
This stops the model from being nudged toward trying run_script to write to a store when that path doesn't actually exist for the artifact's type, avoiding wasted or confused attempts.
