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 v2.1.227 Home All releases olderv2.1.226 v2.1.228newer
Claude Code v2.1.227

Republishing a stale artifact can now pull in the current version for you

You'll notice
Useful3 Signal2
Artifacts

Publishing over a stale artifact now fetches the current version so Claude can merge and retry.

Feature flag
tengu_cobalt_plinth_moss Off by default, switched on for this account

The shipped code defaults this off, and the flag server returned on for the one account this site reads on this version. That is the reading that makes the entry above worth a second look, and it still says nothing about your account.

This account: on · anonymous baseline: on · compiled default in v2.1.227: off

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.227. It isn't a statement about your account. What a flag value here can and cannot tell you

What

Previously a publish was refused when your session had not seen the latest version of a page you were about to overwrite. Claude can now fetch the live page itself, count it as viewed, and hand it back inline with instructions to merge your changes and republish. It applies only to pages you own that nobody else is co-writing, and only under a size cap and a read timeout.

Details
  • Controlled by tengu_cobalt_plinth_moss, which falls back to on when no remote value is present.
  • A successful auto-read raises stale_version_guard_seeded; the page is returned in full for you to merge.
  • Refusals are logged under artifact_guard_autoread with a reason: gate_off, over_cap, read_timeout or sibling_in_flight.
  • Pages containing control bytes are rejected rather than read.
Evidence

artifact_guard_autoread

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

See this entry in the whole of v2.1.227 →