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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.248 ·

Published artifacts can now load a fixed list of CDNs

Published artifacts may now load scripts and fonts from a fixed short list of CDNs.

You'll notice New Features
JSON All of v2.1.248
You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
New FeaturesKind: in v2.1.248,
What probably matters to youSection of the release
What

Artifacts you publish are no longer required to be fully self-contained. Scripts may load from cdnjs.cloudflare.com (preferred), cdn.jsdelivr.net/npm/, cdn.tailwindcss.com and code.jquery.com; stylesheets only from fonts.googleapis.com and fonts.gstatic.com. Everything else, including unpkg, esm.sh and any non-script request even to an allowed CDN, is blocked silently by the content security policy. Available to anyone using artifact publishing on this build.

Details
  • Guidance now asks for pinned UMD builds placed before inline scripts.
  • Mermaid diagrams stay native: "no library needed, don't load one".
  • Previously the same text said self-contained only, with Google Fonts as the sole exception.
Evidence

External resources — CDN allowlist (CSP-enforced)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.248 →

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