feat: MCP server — codebase intelligence tools for Claude Code - #10
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Implements #9: ArbiterX as a local stdio MCP server. Tools exposed: - arbiterx_query(query) — search symbols in the codebase map - arbiterx_overview() — project structure, languages, top symbols - arbiterx_gate(code, language) — score code quality 0-100 - arbiterx_file_symbols(file_path) — list symbols in a specific file Integration: - .mcp.json at plugin root for auto-discovery by Claude Code - CLI subcommand: arbiterx mcp-serve (stdio transport) - Always-on skill updated to instruct AI to use MCP tools first - Uses CLAUDE_PROJECT_DIR env var to find .arbiterx/map.db Architecture: - Uses FastMCP from the 'mcp' package - Runs as stdio transport (local process, no network) - Single-process, reads from existing SQLite map - Falls back gracefully if no map exists Install: pip install arbiterx-gate[mcp] Closes #9
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Summary
Implements #9: ArbiterX as a local MCP server so Claude Code can query the codebase map directly instead of reading raw files.
How It Works
Tools Exposed
arbiterx_query(query)arbiterx_overview()arbiterx_gate(code, language)arbiterx_file_symbols(file_path)Files Changed
src/arbiterx/mcp_server.py— MCP server with FastMCP (stdio transport)src/arbiterx/cli.py— Addedarbiterx mcp-servecommand.mcp.json— Plugin MCP server config (auto-discovered by Claude Code)skills/arbiterx/SKILL.md— Updated to instruct AI to use MCP tools firstpyproject.toml— Addedmcpoptional dependencyUsage
Testing
pip install mcp(optional dep)Closes #9