CLAUDE_CODE_PLUGIN_ATTRIBUTION
A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.246, including the newest one read.
You can declare where a plugin came from via a JSON file or an environment variable.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.246.
In the changelogs
4Releases whose published page names CLAUDE_CODE_PLUGIN_ATTRIBUTION.
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v2.1.259
CLAUDE_CODE_SKILL_ATTRIBUTION test/override env var
A new environment variable lets you inject per-content-hash skill and plugin attribution into command and skill telemetry.
found in this entry's text, named in this entry
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v2.1.259
New CLAUDE_CODE_SKILL_ATTRIBUTION environment variable
A new CLAUDE_CODE_SKILL_ATTRIBUTION variable lets entries declare a skill id alongside a plugin id for attribution.
found in this entry's text, named in this entry
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v2.1.259
Plugin attribution parsing now shares a size-capped, case-normalizing JSON parser
Plugin attribution parsing now goes through a size-capped JSON helper that logs exactly why a value was ignored.
found in this entry's text, named in this entry
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v2.1.246
Plugin provenance can be supplied via CLAUDE_CODE_PLUGIN_ATTRIBUTION
You can declare where a plugin came from via a JSON file or an environment variable.
named in this entry, found in this entry's text
First cited
1The earliest release whose published evidence quoted CLAUDE_CODE_PLUGIN_ATTRIBUTION was v2.1.246, 25 Aug 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
54One 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.