[FEATURE] Add mcp_config option to use Claude Desktop MCP servers

[lelouvincx]

Feature Description

Add a new mcp_config configuration option that allows claudecode.nvim to automatically configure Claude Code CLI to use MCP servers from Claude Desktop's configuration file.

Use Case

Currently, Claude Desktop and Claude Code CLI maintain separate MCP server configurations. Users who have already configured MCP servers in Claude Desktop (filesystem, GitHub, SQLite, etc.) must manually reconfigure the same servers in Claude Code CLI's ~/.claude.json file to use them with claudecode.nvim.

This creates:

• Configuration duplication and maintenance overhead
• Potential for configuration drift between the two systems
• Poor user experience when switching between Claude Desktop and claudecode.nvim

Proposed Solution

Add a new mcp_config field to the plugin configuration:

opts = {
    -- Server Configuration
    port_range = { min = 10000, max = 65535 },
    auto_start = true,
    log_level = "info",
    terminal_cmd = "claude",
    mcp_config = "/Users/username/Library/Application Support/Claude/claude_desktop_config.json"
}

When mcp_config is specified, claudecode.nvim would automatically modify the Claude Code CLI launch command to include the --mcp-config flag:

claude --mcp-config='/Users/username/Library/Application Support/Claude/claude_desktop_config.json'

This leverages Claude Code CLI's existing --mcp-config flag to point to an external configuration file.

Alternatives Considered

1. Manual configuration copying - Users manually copy MCP server configs from Claude Desktop to ~/.claude.json (current workaround)
2. Configuration sync utility - A separate tool to sync configurations between the two systems
3. Environment variable approach - Using environment variables to specify the config path

The proposed solution is cleaner as it uses existing Claude Code CLI functionality and keeps the configuration declarative within the plugin setup.

Additional Context

Default Claude Desktop config locations by OS:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/claude/claude_desktop_config.json

This feature would provide a seamless experience for users who want to use their existing Claude Desktop MCP configurations with claudecode.nvim without manual duplication.

[ThomasK33]

You can append that flag to the terminal_cmd, no need to add new configs.

opts = {
    -- Server Configuration
    port_range = { min = 10000, max = 65535 },
    auto_start = true,
    log_level = "info",
    terminal_cmd = "claude --mcp-config='/Users/username/Library/Application Support/Claude/claude_desktop_config.json'"
}