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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 v2.1.224

Prototype runs and publishes now report their own telemetry

Under the hood
Useful1 Signal2
Elsewhere

Prototype runs and publishes now emit their own telemetry events with the artifact slug.

What

Claude Code emits two new events around prototype artifacts: one when a prototype run starts, and one when a prototype is published, carrying the artifact's slug and whether it was the first publish.

Details
  • The publish event records artifact_slug and is_first_publish.
  • Neither event name exists in the previous build.
  • The functions that emit these events are new; which artifact flow calls them was not traced, so it is not clear from the build itself which user actions trigger them.
Evidence

prototype_publish

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

See this entry in the whole of v2.1.224 →