CLAUDE_CODE_BRIDGE_CHILD_AUTO_DEFAULT
A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.269, including the newest one read.
New env vars let a bridge-spawned child session default to auto permission mode and force-enable artifacts
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.269.
In the changelogs
4Releases whose published page names CLAUDE_CODE_BRIDGE_CHILD_AUTO_DEFAULT.
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v2.1.302
Non-interactive sessions no longer start in auto mode by default unless the server says so
Headless and SDK sessions no longer start in auto mode by default when the server sends no value; an environment variable still forces it
found in this entry's text
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v2.1.273
tengu_bridge_child_auto_mode now defaults on
The gate for defaulting bridge-spawned child sessions to Auto mode now compiles to true by default
found in this entry's text, named in this entry
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v2.1.269
New bridge-child env vars for auto permission mode and artifact publishing
New env vars let a bridge-spawned child session default to auto permission mode and force-enable artifacts
found in this entry's text
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v2.1.269
CLAUDE_CODE_BRIDGE_CHILD_ARTIFACT: new artifact-inheritance signal for bridge child sessions
New CLAUDE_CODE_BRIDGE_CHILD_ARTIFACT env var signals artifact settings to bridge child sessions
found in this entry's text
First cited
3The earliest release whose published evidence quoted CLAUDE_CODE_BRIDGE_CHILD_AUTO_DEFAULT was v2.1.269, 11 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.
Presence across releases
1Build by build
47One 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.