Unclear What the check looks up, and which plugins it matches, is not clear.
What
Plugins are add-on packages for Claude Code. During install, Claude Code now runs an extra check on each plugin. When it matches, install stops with failureCode: "not_found" and an explanatory message.
Why
Some plugins that used to install may now be refused.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
What the check looks up, and which plugins it matches, is not clear.