You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SessionsArea: what it touches
ImprovementsKind: in v2.1.302,
ImprovementsSection of the release
What
A background session is a Claude Code session that keeps running without you watching it. Claude Code changes which environment variables it passes to a new background session. An environment variable is a named value set in your shell that programs can read.
ANTHROPIC_BASE_URL is no longer passed when the background session starts in a different folder from the current one. This variable sends requests through a proxy or gateway instead of the default address. Claude Code notes in its log when it leaves the variable out.
If you route Claude Code through a proxy or gateway and start background sessions in other directories, those sessions do not pick up your ANTHROPIC_BASE_URL. Set it for those folders yourself if they should use the same endpoint.
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeAdded CLAUDE_CODE_AUTO_MODE_MODEL to choose the model the client-side auto mode classifier uses; it does not change the model for…
