A Claude Code environment variable, read out of the shipped bundle.
It has been in the build since v2.1.163, including the newest one read.
Integer milliseconds (minimum 0), default 600000 (10 minutes). It applies only when CLAUDE_CODE_REMOTE_SESSION_ID is set. When an OAuth 401 cannot be recovered and there is no refresh token, Claude Code notes the time of the first such failure; at a later failure at least this long after it, it logs that it is exiting so the runner can restart the session with fresh credentials, and exits with status 1 two seconds later. A successful recovery resets the clock, and 0 turns the exit off.
Not Anthropic's. Written by Claude Opus 5.5 from reading the v2.1.286 bundle, and it can be wrong.
First seen v2.1.163 4 Jun 2026
Last seen v2.1.308 22 Oct 2026
Builds126 / 149on this box, as of v2.1.308
Written about v2.1.163 first named in a changelog, 4 Jun 2026
v2.1.163in the build not in the build never minedv2.1.308
In the changelogs
1
Releases whose published page names CLAUDE_CODE_AUTH_FAIL_EXIT_MS.
The earliest release whose published evidence quoted CLAUDE_CODE_AUTH_FAIL_EXIT_MS was v2.1.163, 4 Jun 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.
ReleaseDateThe span that was quoted
v2.1.1634 Jun 2026OAuth 401 unrecovered past CLAUDE_CODE_AUTH_FAIL_EXIT_MS
Presence across releases
1
BuildsHow manyDatesReading
v2.1.163 – v2.1.308126 builds4 Jun 2026 → 22 Oct 2026 ◆in the build
Build by build
126
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.
