What probably matters to youSection of the release
Unclear What the launcher sign-in does, and whether it runs by default, is not established.
What
Claude Code reads a new environment variable, CLAUDE_CODE_DISABLE_LAUNCHER_SIGN_IN. An environment variable is a named value set in the shell or system that programs can read. When it is set, Claude Code treats sign-in through the launcher as switched off. It counts in either of these places:
the environment Claude Code runs in
the environment section of the machine's managed settings, which an administrator installs
The launcher sign-in also does not apply when Claude Code was not started by the launcher, is not using Anthropic directly, must go through a gateway, has a pinned login method, uses a custom base URL, or already has a launcher credential.
Why
It gives administrators of managed machines a way to opt out of the sign-in that starts from the launcher.