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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 v2.1.257 ·

New artifact-tool actions: version, open, and handler invocation

Artifact tool output now renders version, open and handler actions including get_handlers, call_handler and run_script.

TierYou'll noticehow much it should matter to you
Useful4my rating, 1 to 5
Signal4worth watching, 1 to 5
AreaArtifactswhat it touches
KindImprovementsin v2.1.257,
You'll notice No documentation found

Artifact tool output now renders version, open and handler actions including get_handlers, call_handler and run_script.

The tool-use renderer for the artifacts/canvas tool now handles new action types: version (showing a target url/label), open, and a trio of handler actions, get_handlers, call_handler, and run_script, which delegate to a new handlersToolUseLine renderer. The list action also gained type-filtered display, showing entries of a given type as shared or mine.

Read from
Names in the bundleget_handlerscall_handlerrun_script
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 v2.1.257: 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 v2.1.257. 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 →

How sure we are
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this buildNew in this build: tengu_cobalt_plinth_damson

See this entry in the whole of v2.1.257 →

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