CLAUDE_CODE_HOST_GATEWAY_LINEAGE
A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.281, including the newest one read.
New CLAUDE_CODE_HOST_GATEWAY_LINEAGE variable keeps child processes of a Desktop-hosted gateway session treated as host-managed
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.281.
In the changelogs
2Releases whose published page names CLAUDE_CODE_HOST_GATEWAY_LINEAGE.
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v2.1.281
CLAUDE_CODE_HOST_GATEWAY_LINEAGE: new env var that marks sessions spawned by a Claude Desktop gatewayNew CLAUDE_CODE_HOST_GATEWAY_LINEAGE variable keeps child processes of a Desktop-hosted gateway session treated as host-managed
found in this entry's text, named in this entry
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v2.1.281
Background-session child environment: auth and new variables handled explicitly
Background sessions now start from a cleaned environment, with login variables added back and some internal variables left out
found in this entry's text
First cited
5The earliest release whose published evidence quoted CLAUDE_CODE_HOST_GATEWAY_LINEAGE was v2.1.281, 23 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
3One 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.