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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.259 ·

Artifact-toolset tool-name substitution layer (data/comments/check)

A substitution layer can rewrite legacy artifact tool actions into consolidated data, comments and check tools, adding a spelling notice to prompts.

TierNothing to try yethow much it should matter to you
Useful4my rating, 1 to 5
Signal4worth watching, 1 to 5
AreaArtifactswhat it touches
KindIn Developmentin v2.1.259,
Nothing to try yet No documentation found

A substitution layer can rewrite legacy artifact tool actions into consolidated data, comments and check tools, adding a spelling notice to prompts.

A new indirection layer rewrites references to legacy tool actions, such as the artifact tool's action: "read_db"/"write_db", into new consolidated tool names covering data, comments, and check. When enabled, it also injects a "Tool spelling in this session" notice into prompts.

Read from
Feature flag
tengu_cobalt_plinth_damson 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 v2.1.259: 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 v2.1.259. 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_damson, 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 v2.1.259 →

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