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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 v2.1.238

CLAUDE_CODE_ARTIFACT_SYNC_BASE_URL env var for artifact sync

Use it now
Useful2 Signal3
Artifacts Notable not in their notes

You can point artifact syncing at a different host with a new environment variable.

CLAUDE_CODE_ARTIFACT_SYNC_BASE_URL
What

A new environment variable lets you point artifact syncing at a different host, alongside the existing asset, live and viewer base URLs. Unset by default, so nothing changes unless you set it.

Details
  • Added to the recognised artifact environment variables.
  • The file relay that moves artifact files now fetches each file by its own subpath instead of requesting the bare version root.
Evidence

CLAUDE_CODE_ARTIFACT_SYNC_BASE_URL

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.238 →