Engine MCP

This is an MCP server to help Gemini CLI work on the engine.

It runs over stdout. The CWD is assumed to be //engine/src/flutter. That matches the CWD when executing Gemini CLI from that directory where it is set up.

Testing

The server can be run an queried manually with the following example queries. Automated testing is a bit lacking until we can get it integrated with the dart workspace.

{ "jsonrpc": "2.0", "id": 1, "method": "tools/list" }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "engine_build", "arguments": { "config": "host_profile_arm64", "target": "//flutter/tools/licenses_cpp"} } }

You can test it through gemini too with the following:

cd //engine/src/flutter
gemini -p "what impellerc targets are there for host_debug_unopt_arm64?"