Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.248

/brief is hidden unless the server enables it

Use it now
Useful3 Signal3
Slash Commands Notable not in their notes

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

/briefCLAUDE_CODE_BRIEF
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.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.248 →