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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.277 ·

Artifacts gain a live-room join declaration and stricter "open" tool semantics

Artifacts get a live-room join option and clearer rules for when to use "open" versus publish/create

Under the hood Internal Changes
JSON All of v2.1.277
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Artifact PublishArea: what it touches
Internal ChangesKind: in v2.1.277,
Internal ChangesSection of the release
What

The description text for artifact tools (used for things like documents, slides, or interactive content generated during a session) now covers a new room declaration: joining an artifact's live room means viewer page events arrive back as notifications, and any outbound sends from the artifact need approval first.

  • The guidance also tightens when the open action should be used versus when a publish or create call has already displayed the artifact, to avoid redundant opens.
  • It adds a note that a slide deck built for email or as an attachment, when made from the Slides type, downloads as a .pptx or PDF file.
Why

This gives the artifact tools clearer rules for interactive, live-updating artifacts and for exporting a deck in a usable file format, reducing confusion about which action to call when.

See this entry in the whole of v2.1.277 →

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