The separate artifact-verify and artifact-preview capabilities are combined into a single tool called check. Its search hint dynamically lists "preview a page locally" and/or "read viewers' runtime diagnostics" depending on which capabilities are enabled for a given session. An offersLegacyVerb mechanism maps the old verify and preview verbs back to the new tool for compatibility.
This consolidates two related artifact tools into one, while offersLegacyVerb means existing usage of the old verb names should keep working.
tengu_osier_pylon_trace Not enough to sayNothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.
This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.280: 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.
tengu_cobalt_plinth_aspen Not enough to sayNothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.
This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.280: 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 v2.1.280. It isn't a statement about your account. What a flag value here can and cannot tell you
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Fast mode is not available on Claude Opus 4.6. Requests to `claude-opus-4-6` with `speed: "fast"` do not return an error: they run at standard speed and are billed at [standard rates](https://platform.claude.com/docs/en/about-claude/pricin…build-with-claude/fast-mode see the edit
| Organization and access > User provisioning (SCIM directory sync, Enterprise) | Supported in Claude Science | Provisioning and deprovisioning act on claude.ai membership, which Anthropic checks on every request the app makes, so a deprov…claude-science/admin-controls see the edit
Anthropic's documentation has since written up check, on Admin controls.