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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.221 ·

Fetched artifact HTML has the server-appended comments island stripped

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

You'll notice Improvements
JSON All of v2.1.221
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.221,
ImprovementsSection of the release
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 →

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