What
Plugins add features to Claude Code. Several of the helpers they use have changed. Some of these helpers deal with MCP servers. MCP, the Model Context Protocol, is a standard way of connecting Claude Code to outside tools.
- Connecting to an MCP server: the helper now accepts a provider, and it can connect a server that is listed but not yet connected.
- Listing tools and calling an MCP tool: these helpers now wait for a particular event before they run.
- Tool listing errors: if a tool causes an error while tools are being listed, Claude Code logs that the tool has no description and carries on.
- Git commands run by plugins: these now run with a filtered set of environment variables, so a plugin's git does not get everything in your environment.
Why
One bad tool no longer stops a tool listing. Plugins can bring up servers that were listed but not connected. Git commands started by plugins now see less of your environment.