CLAUDE_CODE_HOST_SKILL_CATALOG
A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.292, including the newest one read.
In remote sessions, CLAUDE_CODE_HOST_SKILL_CATALOG can list the skills allowed to load, and invalid values are ignored with a warning
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.292.
In the changelogs
2Releases whose published page names CLAUDE_CODE_HOST_SKILL_CATALOG.
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v2.1.293
Host skill catalog now refuses "." and ".." as skill folder names
CLAUDE_CODE_HOST_SKILL_CATALOGnow rejects "." and ".." as folder names, and ignores the value with a warning if either appearsfound in this entry's text, named in this entry
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v2.1.292
New
CLAUDE_CODE_HOST_SKILL_CATALOGvariable limits which skills loadIn remote sessions,
CLAUDE_CODE_HOST_SKILL_CATALOGcan list the skills allowed to load, and invalid values are ignored with a warningfound in this entry's text, named in this entry
First cited
3The earliest release whose published evidence quoted CLAUDE_CODE_HOST_SKILL_CATALOG was v2.1.292, 6 Oct 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
1Build by build
4One 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.