[BUG] slash command /btw shown in tips but returns 'Unknown skill' when feature flag isn't enabled.

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

CC actually found the problem:

if((Zn()||zG()&&(aH(process.env.CLAUDE_CODE_BRIEF)||XA("tengu_kairos_brief",!1)))&&A&&!L)

The /btw feature is gated behind a feature flag called tengu_kairos_brief. It checks either:

• An environment variable CLAUDE_CODE_BRIEF is set, OR
• A server-side feature flag tengu_kairos_brief is enabled for your account

It's likely being rolled out gradually and your account hasn't been flagged yet.

The UI bug: the tips show that /btw is available, but it is advertising a feature that's still gated behind tengu_kairos_brief for your account. The hints are probably hardcoded in the binary without checking the feature flag.

What Should Happen?

/btw should be available, but it's not, even though it's advertised as available in the tips

Error Messages/Logs

Unknown skill: btw

Steps to Reproduce

Use /btw during a long / multi-step process

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

v2.1.73

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_