typeCatalogOn
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.
Listing artifact types when the catalog is off no longer throws, just returns empty.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.260.
In the changelogs
4Releases whose published page names typeCatalogOn.
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v2.1.277
Cowork/artifact tool catalog gains docs-type gating flags
A docs/type-related artifact tool is now gated behind new typeCatalogOn, typeCreateOn, quickstartOn and docsTypeOn flags
found in this entry's text, named in this entry
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v2.1.274
Type-locked artifact reads can skip the raw-HTML disk save ("fresh read")
Artifact reads for type-locked artifacts can now return data without first writing it to disk
found in this entry's text
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v2.1.271
list_types error message now conditioned on typeCatalogOn gate
Artifacts tool's list_types error message now differs depending on whether the type-catalog feature is enabled
found in this entry's text
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v2.1.260
list_types now degrades gracefully instead of throwing when the type catalog is off
Listing artifact types when the catalog is off no longer throws, just returns empty.
found in this entry's text
First cited
1The earliest release whose published evidence quoted typeCatalogOn was v2.1.277, 18 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.