/brief is hidden unless the server enables it

/brief is hidden by server config, but brief mode still works via an environment variable.

Use it now Notable No documentation found In Development

JSON All of v2.1.248

Use it nowTier: how much it should matter to you

3Useful: my rating, 1 to 5

3Signal: worth watching, 1 to 5

Slash CommandsArea: what it touches

In DevelopmentKind: in v2.1.248, 27 Aug 26

What probably matters to youSection of the release

What

The /brief command for toggling brief-only replies only appears when the remote config tengu_kairos_brief_config returns enable_slash_command: true; the built-in fallback is false, so the command is hidden in this build. Brief mode is still reachable through the CLAUDE_CODE_BRIEF environment variable or the settings flag.

Details

Entering brief mode records tengu_brief_mode_enabled, with a gated marker when the entitlement check fails.

Usage

CLAUDE_CODE_BRIEF=1 claude

Evidence

tengu_kairos_brief_config

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Read from

Names in the bundle/briefCLAUDE_CODE_BRIEF

See this entry in the whole of v2.1.248 →

The build it came inv2.1.248

27 Aug 2026 · 876 entries, this one is #125.

Use it now64
You'll notice420
Nothing to try yet95
Under the hood297

Either side of it

v2.1.247Older
v2.1.250Newer

Open the release →

Names in this entry

slash/brief
/brief is hidden by server config, but brief mode still works via an environment variable.
flagtengu_kairos_brief_config
/brief is hidden by server config, but brief mode still works via an environment variable.
envCLAUDE_CODE_BRIEF
/brief is hidden by server config, but brief mode still works via an environment variable.
flagtengu_brief_mode_enabled
/brief is hidden by server config, but brief mode still works via an environment variable.

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