Problem

The clangd plugin is missing the lspServers field in .claude-plugin/marketplace.json. Claude Code reads LSP configuration from this field, not from .lsp.json files in plugin directories.

Impact

The LSP tool reports "No LSP server available for file type" for C/C++ files even when the plugin is installed.

Solution

Add lspServers configuration to the clangd plugin entry in marketplace.json, following the pattern used by claude-plugins-official.