Follow Discord
Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
Home / Reference / Settings keys

contentType

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.

Publishing an artifact data file with an unknown extension fails early and tells you to set contentType.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.246.

First seen — never in a mined build
Last seen — never in a mined build
Builds0 / 149on this box, as of v2.1.308
Written about v2.1.246 first named in a changelog, 25 Aug 2026

In the changelogs

5

Releases whose published page names contentType.

  1. v2.1.277
    Artifact publish rejects remote {artifact,path} file references, requires local copies

    Artifact publish now rejects file references into other artifacts, requiring a local copy instead

    found in this entry's text

  2. v2.1.274
    Artifact type/design-system file resolution now checks project/ prefix and supports installing saved design-system tokens directly

    Artifact file lookups now also check a project/ prefix, and saved design tokens can be installed directly

    found in this entry's text

  3. v2.1.274
    Artifact create now accepts per-file content type

    Artifact file uploads can now specify a content type per file

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

  4. v2.1.268
    Artifact publish files copy-by-artifact now infers contentType from destination path

    Publishing an artifact file copy now figures out its content type from the destination path automatically

    found in this entry's text

  5. v2.1.246
    Artifact data files need a known file type

    Publishing an artifact data file with an unknown extension fails early and tells you to set contentType.

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

First cited

4

The earliest release whose published evidence quoted contentType was v2.1.268, 10 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.

ReleaseDateThe span that was quoted
v2.1.26810 Sep 2026!wmr.has(hG(C.contentType))
v2.1.26810 Sep 2026...ec(L, U.contentType, tc(P))
v2.1.27416 Sep 2026Je({ from: o().min(1).max(512), contentType: o().optional() })
v2.1.27718 Sep 2026Publish this file from a local copy: a source path inside root, or {from, contentType}.

Presence across releases

0

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.

Feedback