What
The check that runs before a plugin's command.run operation executes used to reject the call with an error if its arguments exceeded a maximum length. That rejection has been removed: the check now only records the argument length for telemetry (internal usage tracking) and always allows the call to proceed.
Why
Plugin commands with very long arguments that would previously have been blocked can now run instead, since the length limit is no longer enforced, only measured.
Names in the bundlecommand.run
Documented inclaude-code/plugins/mods/api
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Confirmed since
Anthropic's documentation has since written up command.run, on Troubleshoot a mod.
### `no command.run hook answered it`plugins/mods/troubleshoot see the edit
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agrees
Anthropic's documentation has since written up command.run, on Troubleshoot a mod.