experimental
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.
MCP task results and cancellations now use standard requests instead of an experimental helper.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.221.
In the changelogs
8Releases whose published page names experimental.
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v2.1.285
Browser MCP server setup now runs a bundled Playwright script
Claude Code can build a browser MCP server that runs a bundled Playwright script with node and sets CLAUDE_TEST_PROJECT_DIR
found in this entry's text
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v2.1.283
Plugin validation checks more manifest paths
claude plugin validatenow checks paths for more plugin parts and flags a .json path that is really a folderfound in this entry's text
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v2.1.248
Agents can set their own prompt cache lifetime in frontmatter
An agent file can set its own prompt cache lifetime under experimental cacheTtl.
named in this entry, found in this entry's text
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v2.1.235
claude plugin eval --eval-dirshipped, with ownership checks on where cases and results are writtenplugin eval's --eval-dir flag ships with checks that it isn't writing results to a symlinked or foreign-owned directory
found in this entry's text
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v2.1.235
plugin evalgains --eval-dir and a manifest eval directory, still early accessplugin eval gets a configurable case directory via --eval-dir or a manifest key, still gated as early access
found in this entry's text
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v2.1.235
plugin evalcan target a non-default eval directoryclaude plugin evalgets an--eval-dir <dir>flag to target a non-default eval directoryfound in this entry's text
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v2.1.221
MCP tasks use raw requests instead of the experimental client helpers
MCP task results and cancellations now use standard requests instead of an experimental helper.
found in this entry's text
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v2.1.129
Better Plugin Authoring Diagnostics
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.