What it is
Plugins can now list, register, and run slash commands, and open or close a UI surface
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.265.
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.
First cited
5The earliest release whose published evidence quoted command.run was v2.1.265, 8 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 above.
Names beside it
Every settings key in the inventory starting command, up to twelve of them.
commandYour MCP allow and deny rules now match servers whose commands or URLs use environment variables. v2.1.138
command.describePlugins can now register, run, list and describe their own slash commands via a new command API never mined
command.listPlugins can now list, register, and run slash commands, and open or close a UI surface never mined
command.registerPlugins can now list, register, and run slash commands, and open or close a UI surface 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.