What it is
Set to 0 to turn off the [diff of the files that changed while a Bash command ran](/docs/en/hooks#bash), or 1 to record it in every permission mode. Takes precedence over the [bashEditDiffEnabled](/docs/en/settings-reference#basheditdiffenabled) setting. Requires Claude Code v2.1.269 or later
Anthropic's own wording. Read off Environment variables, captured 2026-09-22.
Presence across releases
1Build by build
10One 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.
First cited
1The earliest release whose published evidence quoted CLAUDE_CODE_BASH_EDIT_DIFF 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 above.
Names beside it
Every environment variable in the inventory starting claude_code_bash, up to twelve of them.
CLAUDE_CODE_BASH_OUTPUT_AUDIENCE_NOTEA new reminder can tell Claude that the user only sees a few lines of Bash output, so it must repeat what matters in its reply v2.1.235
CLAUDE_CODE_BASH_SANDBOX_SHOW_INDICATORNo description from anybody. v2.1.138
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.