format
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.
Code display component gains a validated 'diff' format alongside plain source, plus a wrap/truncate display option
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.265.
In the changelogs
7Releases whose published page names format.
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v2.1.288
Side requests retry without a reply format when the model rejects it
If the API rejects the requested reply format on a side request, Claude Code now remembers that model and retries without it
found in this entry's text
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v2.1.275
Query-string redaction helper for logged URLs
URLs shown in logs now have most query-string values redacted
found in this entry's text
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v2.1.274
Git tag/GPG signing config keys defined but apparently unused
New git config entries for tag and commit signing (like tag.gpgSign, gpg.format) added, purpose unclear
found in this entry's text
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v2.1.271
Artifacts gain automatic reference-doc bundling with new telemetry
Artifacts now auto-bundle in reference docs like format and font guides, tracked with a new telemetry event
found in this entry's text
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v2.1.265
Code block renderer gains a 'diff' format with unified-diff parsing and validation
Code display component gains a validated 'diff' format alongside plain source, plus a wrap/truncate display option
found in this entry's text
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v2.1.119
Enhanced JSON Schema Generation
found in this entry's text
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v2.1.38
Output Format Deprecation
found in this entry's text
First cited
0No 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
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.