Under the hood
Plugin install/publish now handles npm-based marketplace plugins via a dedicated resolution path
What
When installing or publishing a plugin whose id matches an npm-marketplace naming pattern, Claude Code now marks the operation with an isNpmMarketplaceLane flag and resolves its version through npm resolution, rather than through the normal git/archive-based resolution used for other plugins.
Why
This lets Claude Code properly support plugins distributed via npm marketplaces, using version resolution appropriate to npm packages instead of the git-based flow.