Feature Proposal: Add MCP (Model Context Protocol) Server Support to DeSmuME #950
Description
Summary
I would like to propose adding support for an MCP (Model Context Protocol) server to DeSmuME.
I have already implemented a working prototype based on the current codebase here:
https://github.com/suhli/desmume/tree/mcp
This branch demonstrates that integrating an MCP server into DeSmuME is feasible with minimal intrusion into the existing architecture.
Motivation
Adding MCP server support would allow:
- External AI agents (e.g., Cursor, LLM-based tools) to interact with the emulator programmatically
- Automated testing and scripted control of emulator state
- Memory inspection and manipulation through a standardized protocol
- Remote debugging and tooling integration
- Advanced automation workflows
This would make DeSmuME significantly more extensible for modern AI-assisted workflows.
What the Prototype Implements
The mcp branch currently includes:
- Embedded MCP server inside DeSmuME
- Emulator state control (start, stop, reset, etc.)
- Memory read/write APIs
- Frame stepping support
- Basic structured command interface
The implementation is isolated and does not interfere with the normal UI execution path.
Design Considerations
- The MCP server runs in a separate thread.
- Communication is JSON-based.
- The feature can be compiled optionally (e.g., via a build flag).
- No changes to core emulation logic were required.
If maintainers prefer, this can be:
- A compile-time optional feature
- A separate build target
- Or maintained as a plugin-style integration
Questions for Maintainers
-
Would you be open to integrating MCP server support?
-
Should this be implemented as:
- A core optional module?
- A plugin?
- Or kept as a separate fork?
-
Are there architectural constraints I should follow before preparing a PR?
Next Steps
If there is interest, I can:
- Clean up the branch
- Split into smaller reviewable commits
- Add documentation
- Submit a formal PR
Looking forward to your feedback.