process.spawn
A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
Plugins can now spawn and stream a subprocess via a new process.spawn host operation
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.280.
In the changelogs
3Releases whose published page names process.spawn.
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v2.1.280
New plugin/hooks host op: process.spawn
Plugins can now spawn and stream a subprocess via a new process.spawn host operation
named in this entry, found in this entry's text
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v2.1.280
Process-spawn telemetry gains stdout/stderr chunk validation
Process-spawn telemetry now validates the shape of each stdout/stderr chunk it records
found in this entry's text
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v2.1.280
Plugin host ops gained a streaming pull/close protocol
Plugin hooks gained a streaming pull/close protocol underlying features like process.spawn
found in this entry's text
First cited
1The earliest release whose published evidence quoted process.spawn was v2.1.280, 22 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
0The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.
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 settings key does. All settings keys.