`defineTheme`

setting never mined JSON

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.

The plugin theme.set call now accepts colours as well as a backdrop, and needs at least one of the two

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.321.

First seen — never in a mined build

Last seen — never in a mined build

Builds0 / 161on this box, as of v2.1.322

Written about v2.1.321 first named in a changelog, 9 Nov 2026

In the changelogs

Releases whose published page names defineTheme.

v2.1.321 9 Nov 2026
Plugins can set theme colours with theme.set, not only the backdrop
The plugin theme.set call now accepts colours as well as a backdrop, and needs at least one of the two

named in this entry, found in this entry's text

First cited

No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.

Presence across releases

The 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.