CLAUDE_CODE_COMMIT_BETWEEN_KEYS
A Claude Code environment variable, read out of the shipped bundle. It was in the build from v2.1.281 and was gone by v2.1.284.
A new environment variable, CLAUDE_CODE_COMMIT_BETWEEN_KEYS, is read by the terminal display code and counts as off when unset
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.281.
In the changelogs
4Releases whose published page names CLAUDE_CODE_COMMIT_BETWEEN_KEYS.
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v2.1.284
Keys that arrive together are always handled one at a time, with no way to turn it off
CLAUDE_CODE_COMMIT_BETWEEN_KEYSno longer does anything; handling a burst of keys one by one is always onfound in this entry's text
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v2.1.283
Keys that arrive together can now be handled one at a time by default
Several keypresses arriving at once can now be drawn one by one without setting
CLAUDE_CODE_COMMIT_BETWEEN_KEYSfound in this entry's text, named in this entry
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v2.1.281
New env var CLAUDE_CODE_COMMIT_BETWEEN_KEYS for the terminal renderer
A new environment variable, CLAUDE_CODE_COMMIT_BETWEEN_KEYS, is read by the terminal display code and counts as off when unset
found in this entry's text, named in this entry
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v2.1.281
Terminal input flushes React work between keys in one read
When several keypresses arrive at once, the terminal interface can now finish its screen updates between each key
named in this entry
First cited
2The earliest release whose published evidence quoted CLAUDE_CODE_COMMIT_BETWEEN_KEYS 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
2Build by build
38One 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.