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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 v2.1.221

Fetched artifact HTML has the server-appended comments island stripped

You'll notice
Useful3 Signal0
Artifacts

Reading back a published artifact no longer dumps the server's trailing comments blob into the HTML.

What

Reading a published artifact back no longer leaves the server's trailing comments payload embedded in the HTML you get.

Details
  • A trailing JSON script block holding the comments payload and its MAC is removed before the HTML is used.
  • The reported byte count is recomputed from the stripped text rather than the raw response.
  • The fetch result now also carries the page favicon.
  • The read telemetry event name is parameterized by caller instead of hardcoded.
Evidence

<script type="application/json" id="__frame_comments__">

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

See this entry in the whole of v2.1.221 →