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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.248

Preview pages may request the local diagram script but nothing else new

You'll notice
Useful2 Signal2
Artifacts

Previewed pages may fetch the local diagram bundle; everything else off-origin is still refused.

What

The check that stops previewed pages reaching the network now explicitly allows the diagram bundle path, provided it has no query string and is on the preview server's own origin. Everything else is still refused with "Preview refuses network-reaching paths".

Details
  • The list of permitted remote path prefixes is now a plain array: /css, /icon, /earlyaccess/, /s/, /l/, /ea/.
  • Preview remains gated overall; when the gate helper returns false the decision is a denial with reason "Preview gate closed at schema freeze".
Evidence

["/css", "/icon", "/earlyaccess/", "/s/", "/l/", "/ea/"]

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 →