You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
RemovedKind: in v2.1.309,
Bug FixesSection of the release
What
Artifacts are pages Claude can publish. Pages built with the artifact-pr-review machinery (a template for pull request reviews) no longer get special checks when published:
The template check is gone. It used to fail with "This page carries the artifact-pr-review machinery but failed publish-time validation" and the code pr_review_template_mismatch.
The single-file rule is gone. Publishing used to refuse with "artifact-pr-review pages are single-file: supporting files are not allowed alongside a review page (nothing was published)" when files came with a review page.
The composedPrReview and previewOnly options, which allowed mermaid diagram blocks and stamp bindings, are no longer used. composedPrReview is no longer passed to the page renderer, and previewOnly is removed from one render call.
The Artifact tool's input loses its prReviewOn switch and the related rules.
Why
PR-review pages are no longer checked against their template or limited to a single file when published. Together with the removed prReviewOn switch, this suggests the PR-review artifact flow was taken out or moved.
