Unclear It's unclear whether the tengu_sage_compass2 gate plays any role in this check, since no reading of it has been taken.
What
A new internal tool/event kind called "advisor" has been introduced.
- It can be disabled with an environment variable, and otherwise requires a first-party Anthropic account plus an internal entitlement check before it's available.
- The availability check was refactored into a shared helper function, replacing inline checks that combined the disable env var, first-party account check, and entitlement check.
- When you change the advisor model setting mid-conversation (from the
/advisorUI or its slash command), Claude Code now shows a contextual note explaining when the new setting will actually take effect — for example, if the API already refused to use the advisor this turn, or if the conversation already locked in a different advisor model or tool declaration.
Why
This lays the groundwork for an advisor feature restricted to eligible accounts, and helps avoid confusion by telling you explicitly when a mid-conversation change to the advisor setting won't apply immediately.
tengu_sage_compass2 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 v2.1.275: not a boolean we can read
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 v2.1.275. 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.
| `400` errors on every request, in the gateway's own words rejecting an unrecognized tool type, such as `Input tag 'advisor_20260301'`, on Claude Code v2.1.275 | In a gradual rollout on that version, requests carry an [advisor tool](/docs…llm-gateway-connect see the edit
It's unclear whether the `tengu_sage_compass2` gate plays any role in this check, since no reading of it has been taken.
Anthropic's documentation has since written up CLAUDE_CODE_DISABLE_ADVISOR_TOOL, on Connect Claude Code to an LLM gateway.