CLAUDE_CODE_COORDINATOR_WORKER_CHECKIN_SECONDS
A Claude Code environment variable, read out of the shipped bundle. It was in the build from v2.1.246 and was gone by v2.1.283.
Set an interval and your coordinator session gets periodic worker status nudges listing each worker's activity.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.246.
In the changelogs
4Releases whose published page names CLAUDE_CODE_COORDINATOR_WORKER_CHECKIN_SECONDS.
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v2.1.283
Worker check-ins now follow a schedule set by CLAUDE_CODE_WORKER_CHECKIN_SCHEDULE
One schedule variable replaces the two single-interval check-in variables, and setting the old ones no longer changes anything
found in this entry's text
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v2.1.248
Three new environment variables
Three new env vars tune the read-only memory notice, async agent stall timeout and check-in interval.
named in this entry, found in this entry's text
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v2.1.246
Periodic status nudge for long-running dispatched workers
Set an interval and your coordinator session gets periodic worker status nudges listing each worker's activity.
named in this entry, found in this entry's text
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v2.1.246
A second kind of periodic check-in alongside goal check-ins
Coordinator worker check-ins are their own check-in type with their own interval setting and reset behaviour.
named in this entry, found in this entry's text
First cited
1The earliest release whose published evidence quoted CLAUDE_CODE_COORDINATOR_WORKER_CHECKIN_SECONDS was v2.1.246, 25 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.
Presence across releases
2Build by build
53One 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.