Whether an artifact auto-opens in a local browser is now behind a new env var, off by default.
Artifact "open action" behavior is now controlled by the CLAUDE_CODE_ARTIFACT_OPEN_ACTION env var, falling back to the tengu_cobalt_plinth_willow gate (off by default). This replaces the prior behavior of the same function, which built an internal --computer-use-mcp MCP config, so it's a genuine behavior swap rather than a rename. Surrounding code enumerates browser executable paths (Chrome, Chromium, Edge, Brave), suggesting this governs whether an artifact auto-opens in a local browser.
tengu_cobalt_plinth_willow Off in both readingsThe 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
New in this build: CLAUDE_CODE_ARTIFACT_OPEN_ACTION