Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.274 ·

Artifacts tool result text now distinguishes fully-public artifacts from org-internal ones

Artifacts tool now warns more strongly when a fully public artifact was made outside your organization

TierNothing to try yethow much it should matter to you
Useful2my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaArtifactswhat it touches
KindIn Developmentin v2.1.274,
Nothing to try yet No documentation found

Artifacts tool now warns more strongly when a fully public artifact was made outside your organization

What

When the Artifacts tool (used to create and view pages on claude.ai) reads or lists files, it now checks whether a result is marked as fully publicly readable. When an artifact is both public and was created outside the user's own organization, Claude now gets a stronger warning that the artifact could have been written by anyone on the internet. This is separate from the existing warnings about artifacts with outside writers or co-written artifacts.

Why

This gives Claude clearer signal about the trustworthiness of content it's reading from artifacts, so it can treat fully public, externally-authored content with appropriate caution.

Read from
Names in the bundletengu_cobalt_plinth_sedge
Feature flag
tengu_cobalt_plinth_sedge 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 v2.1.274: 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 v2.1.274. It isn't a statement about your account. What a flag value here can and cannot tell you

What has happened since
Flag reading moved The flag server now returns on for tengu_cobalt_plinth_sedge, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.

See this across every release →

See this entry in the whole of v2.1.274 →