A Claude Code environment variable, read out of the shipped bundle.
It was in the build from v2.1.158 and was gone by v2.1.207.
Accepted for compatibility with older releases and has no effect. Auto mode is available by default on every provider, including Amazon Bedrock, Google Cloud's Agent Platform, Microsoft Foundry, and signed-in Claude apps gateway sessions. In v2.1.158 through v2.1.206, setting this to 1 was required to make auto mode available on those providers
Auto mode no longer needs CLAUDE_CODE_ENABLE_AUTO_MODE; setting it now does nothing at all.
found in this entry's text
First cited
1
The earliest release whose published evidence quoted CLAUDE_CODE_ENABLE_AUTO_MODE was v2.1.268, 10 Sep 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.
v2.1.207 – v2.1.30890 builds10 Jul 2026 → 22 Oct 2026 ○not in the build
Build by build
131
One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the environment variable does. All environment variables.
