Source Intelligence

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.

All of v2.1.247 Home All releases olderv2.1.246 v2.1.248newer
Claude Code v2.1.247

Artifact deletion goes through the relay and can refuse in cloud sessions

Use it now
Useful3 Signal3
Artifacts Notable not in their notes

Artifact deletion now uses a verified relay route and still needs the delete environment variable.

Feature flag
tengu_cobalt_plinth_alder Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.247: on

Read once, for one account on one subscription tier, against v2.1.247. It isn't a statement about your account. What a flag value here can and cannot tell you

CLAUDE_CODE_ARTIFACT_DELETEtengu_cobalt_plinth_alder
What

Deleting an artifact no longer talks to the frame client directly; it uses a relay-only DELETE route that recognises when the relay is unavailable or not serving this session, verifies that 404s and success statuses really came from the Artifact service rather than an intercepting proxy, and shows a refusal message in cloud sessions that cannot delete. Delete itself still requires the CLAUDE_CODE_ARTIFACT_DELETE environment variable or the flag tengu_cobalt_plinth_alder, whose fallback is off.

Details
  • New outcomes handled on the relay leg: relay-unavailable and relay-not-served.
  • The provenance check means a proxy answering on the service's behalf cannot be read as a completed deletion.
Evidence

Deleting Artifacts isn't available in this cloud session right now

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

See this entry in the whole of v2.1.247 →