CLAUDE_CODE_DIFF_COPY_ROOT

A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.307, including the newest one read.

Releases whose published page names CLAUDE_CODE_DIFF_COPY_ROOT.

1. v2.1.307 21 Oct 2026
   Two new reserved environment variables for diff copies and found repositories

   CLAUDE_CODE_DIFF_COPY_ROOT and CLAUDE_CODE_FOUND_REPOSITORY_GIT join a protected list of environment variable names

   found in this entry's text

2. v2.1.307 21 Oct 2026
   Self-hosted runner options for proxies, checkout hook time limits and nested repositories

   The self-hosted runner reads its proxy from --agent-proxy-url, limits checkout hook time and tightens how nested-repository diffs are shown

   found in this entry's text

3. v2.1.307 21 Oct 2026
   Managed sessions protect a copy of the repository's git settings

   A new CLAUDE_CODE_DIFF_COPY_ROOT variable names a folder for a checked copy of git settings, and only the starting environment may set it

   found in this entry's text

The earliest release whose published evidence quoted CLAUDE_CODE_DIFF_COPY_ROOT was v2.1.307, 21 Oct 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.

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.