MCP Servers

xcode-build-optimizer-mcp

MCP server for Xcode build optimization, providing build-timing analysis, DerivedData/module-cache management, and build-speed config linting for AI coding agents.

README

xcode-build-optimizer-mcp

An MCP server for deterministic Xcode build-time optimization: build-timing analysis, DerivedData/module-cache management, and build-speed config linting — for AI coding agents (Claude Code, Claude Desktop, and other MCP clients).

This is deliberately not a build/test/simulator orchestration tool — use it alongside XcodeBuildMCP or any other build runner.

Install

npx xcode-build-optimizer-mcp

Add to your MCP client config (e.g. Claude Code ~/.claude.json or Claude Desktop claude_desktop_config.json):

{
  "mcpServers": {
    "xcode-build-optimizer": {
      "command": "npx",
      "args": ["xcode-build-optimizer-mcp"]
    }
  }
}

Tools

Tool	Purpose
`build_run`	Run an instrumented `xcodebuild` build; returns structured errors/warnings and a `buildId`.
`build_timing_report`	Ranked slow build task categories/functions/expressions for a `build_run` result.
`cache_inspect`	DerivedData/module-cache size, staleness, and bloat report.
`cache_clean`	Delete a specific cache path reported by `cache_inspect` (requires `confirm: true`).
`config_lint`	Scan `.pbxproj`/`.xcconfig` for 8 known build-speed anti-patterns.

Requirements

macOS with Xcode Command Line Tools installed.
Node.js >= 20.

For per-expression timing, pass deep: true to build_run; build_timing_report then reports deepSource: "debug-time-function-bodies".

Not yet implemented: an opportunistic XCLogParser enhancement was prototyped but is not wired up in v0.1 — its JSON output shape and the .xcactivitylog naming convention it depends on have not been verified against a real XCLogParser install. build_timing_report never invokes xclogparser, whether or not it is on PATH.

Contributing

Issues and PRs welcome. Run npm test before submitting; npm run test:integration additionally requires a full Xcode install and runs a real build against the fixture project in test/integration/.

License

MIT

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