mantle
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.
Your selected model is passed along whenever Claude Code re-executes itself.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.228.
In the changelogs
7Releases whose published page names mantle.
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v2.1.283
Gateway can now forward to Bedrock Mantle and to Google Cloud's Anthropic endpoint
The gateway configuration accepts two new upstream providers,
mantlefor Bedrock Mantle andanthropicGoogleCloudfor Google Cloudnamed in this entry, found in this entry's text
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v2.1.281
Bootstrap config: new flat (v1) JSON schema and per-value version stamps
The shared bootstrap configuration gains a flat (v1) format, and each setting is now tagged with the first Desktop release that reads it
found in this entry's text
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v2.1.266
CLAUDE_CODE_USE_GATEWAY no longer selects gateway auth mode directly
Setting CLAUDE_CODE_USE_GATEWAY alone no longer switches Claude Code into gateway auth mode
found in this entry's text
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v2.1.248
More model providers recognised, each with its own auth-skip variable
More model providers are accepted, each with an environment variable to skip its auth step.
found in this entry's text
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v2.1.228
Model selection forwarded on restart-in-place
Your selected model is passed along whenever Claude Code re-executes itself.
found in this entry's text
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v2.1.218
Pricing Records:
canonicalModelandproviderFieldsfound in this entry's text
- v2.1.170
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.