Under the hood
A new helper classifies where a plugin was loaded from, for telemetry and error messages
What
A new internal function classifies how a plugin was loaded into one of three categories: marketplace_not_available (for plugins from reserved registries such as pip, uv, cargo, github, or gh), builtin, or directory_loaded.
Why
This gives Claude Code a consistent way to label a plugin's load source in telemetry and error reporting, which can help diagnose plugin-loading issues.