A Claude Code environment variable, read out of the shipped bundle.
It has been in the build since v2.1.233, including the newest one read.
In screen reader mode, how many milliseconds Claude Code waits, with the cursor at the start of the line, before it writes a new or changed line. Default 50. Set 0 to write immediately. Claude Code caps the wait at 5000. Requires Claude Code v2.1.233 or later
Screen-reader mode waits briefly before redrawing so bursts are announced once; tune the delay with an env var.
named in this entry, found in this entry's text
First cited
1
The earliest release whose published evidence quoted CLAUDE_AX_PREPARK_MS was v2.1.233, 14 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.
v2.1.233 – v2.1.30865 builds14 Aug 2026 → 22 Oct 2026 ◆in the build
Build by build
65
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.
