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MCP++ Implementation Summary

This document summarizes the implementation of the MCP++ (MCP Plus Plus) module, which provides a Trio-native implementation of the Model Context Protocol with peer-to-peer capabilities.

Module name: ipfs_accelerate_py.mcplusplus_module (named with underscores instead of ++ due to Python naming constraints)

Overview

The ipfs_accelerate_py/mcplusplus_module/ module has been created to implement the MCP++ blueprint from the Mcp-Plus-Plus repository, following the roadmap detailed in docs/MCP_TRIO_ROADMAP.md.

What Was Implemented

1. Submodule Addition ✅

Added the Mcp-Plus-Plus repository as a git submodule:

  • Location: ipfs_accelerate_py/mcplusplus/
  • Purpose: Provides testing infrastructure and MCP++ specification
  • Configuration: Added to .gitmodules

2. Module Structure ✅

Created the ipfs_accelerate_py/mcplusplus_module/ directory with the following structure:

ipfs_accelerate_py/mcplusplus_module/
├── README.md              # Module documentation
├── __init__.py            # Module initialization and exports
├── trio/                  # Trio-native MCP implementation
│   ├── __init__.py
│   └── bridge.py         # Trio bridge utilities (run_in_trio, etc.)
├── p2p/                   # P2P networking layer
│   └── __init__.py
├── tools/                 # MCP tools for P2P operations
│   ├── __init__.py
│   └── taskqueue_tools.py # P2P taskqueue MCP tools (partial)
└── tests/                 # Test infrastructure
    ├── __init__.py
    └── test_trio_bridge.py # Trio bridge tests

3. Trio Bridge Implementation ✅

File: ipfs_accelerate_py/mcplusplus_module/trio/bridge.py

Implements key utilities for running Trio code in different contexts:

  • run_in_trio(func, *args, **kwargs): Runs a callable in a Trio context, handling both asyncio-to-Trio and native Trio execution
  • is_trio_context(): Checks if currently in a Trio event loop
  • require_trio(): Raises error if not in Trio context
  • TrioContext: Context manager for ensuring Trio execution

This replaces the inline _run_in_trio helper from the original MCP implementation with a reusable, well-documented module.

4. P2P Module Structure ✅

File: ipfs_accelerate_py/mcplusplus_module/p2p/__init__.py

Defines the P2P networking layer components (to be implemented):

  • P2PTaskQueue: Task queue client
  • RemoteQueue: Remote queue connection
  • P2PWorkflowScheduler: Workflow scheduler
  • P2PPeerRegistry: Peer discovery and registry
  • SimplePeerBootstrap: Bootstrap helpers

5. MCP Tools for P2P ✅

File: ipfs_accelerate_py/mcplusplus_module/tools/taskqueue_tools.py

Started refactoring P2P taskqueue tools from the original implementation:

  • Uses the new run_in_trio from the trio module
  • Simplified structure
  • Ready for full implementation of all taskqueue tools

6. Test Infrastructure ✅

File: ipfs_accelerate_py/mcplusplus_module/tests/test_trio_bridge.py

Comprehensive tests for the Trio bridge:

  • Tests for is_trio_context() in and out of Trio
  • Tests for require_trio() behavior
  • Tests for run_in_trio() with async and sync functions
  • Integration tests for Trio nurseries and cancel scopes

7. Documentation ✅

File: ipfs_accelerate_py/mcplusplus_module/README.md

Comprehensive module documentation including:

  • Overview of MCP++ features
  • Architecture diagram
  • Key differences from original MCP
  • Migration guide
  • Usage examples
  • Testing instructions
  • Roadmap reference

Key Design Decisions

1. Trio-First Architecture

Instead of bridging asyncio-to-Trio at every call site, the mcp++ module is designed to run natively on Trio:

  • Direct Trio event loop integration
  • No thread hops for P2P operations
  • Uses Trio nurseries, cancel scopes, etc.

2. Separate Module

Rather than modifying the existing ipfs_accelerate_py/mcp/ module, we created a separate mcplusplus_module module:

  • Pros: Clean separation, no risk to existing code, can evolve independently
  • Cons: Code duplication (addressed via refactoring plan), module name with underscores instead of ++
  • Future: Can gradually migrate from old MCP to new MCP++

Note: The module is named mcplusplus_module instead of mcp++ because Python module names cannot contain special characters like +.

3. Testing Infrastructure from Submodule

The Mcp-Plus-Plus submodule provides:

  • MCP++ specification and documentation
  • Testing infrastructure (tests-py, tests-go, tests-rs, tests-ts)
  • Validation tools

4. Backward Compatibility

The original MCP implementation remains unchanged:

  • Existing code continues to work
  • Migration is opt-in
  • Both implementations can coexist

Roadmap Alignment

Following docs/MCP_TRIO_ROADMAP.md:

✅ Completed

  1. Bridge everywhere - Created trio/bridge.py with run_in_trio helper
  2. Module structure - Set up mcp++/ with proper organization
  3. Submodule integration - Added Mcp-Plus-Plus as submodule

🔄 In Progress

  1. Refactor P2P code from original MCP module:
    • ✅ Started with tools/taskqueue_tools.py
    • ⏳ Need to complete all taskqueue tools
    • ⏳ Refactor p2p_workflow_tools.py
    • ⏳ Refactor github_cli/p2p_*.py files

⏳ Next Steps

  1. Implement Trio-native MCP server (trio/server.py)
  2. Implement Trio-native MCP client (trio/client.py)
  3. Add comprehensive integration tests
  4. Document migration path from asyncio-based MCP

Migration Path

For users wanting to adopt MCP++:

Option 1: Keep asyncio + bridge (current state)

  • Continue using FastAPI/Uvicorn
  • Use run_in_trio for P2P operations
  • Minimal changes to deployment

Option 2: Full Trio migration (future)

  • Use Hypercorn with Trio worker
  • Run entire MCP server under Trio
  • Direct P2P integration without bridges

Files Modified/Added

Added Files

  1. ipfs_accelerate_py/mcplusplus/ (submodule)
  2. ipfs_accelerate_py/mcplusplus_module/__init__.py
  3. ipfs_accelerate_py/mcplusplus_module/README.md
  4. ipfs_accelerate_py/mcplusplus_module/trio/__init__.py
  5. ipfs_accelerate_py/mcplusplus_module/trio/bridge.py
  6. ipfs_accelerate_py/mcplusplus_module/p2p/__init__.py
  7. ipfs_accelerate_py/mcplusplus_module/tools/__init__.py
  8. ipfs_accelerate_py/mcplusplus_module/tools/taskqueue_tools.py
  9. ipfs_accelerate_py/mcplusplus_module/tests/__init__.py
  10. ipfs_accelerate_py/mcplusplus_module/tests/test_trio_bridge.py

Modified Files

  1. .gitmodules (added Mcp-Plus-Plus submodule)

Testing

To run the tests:

# Test Trio bridge functionality
pytest ipfs_accelerate_py/mcplusplus_module/tests/test_trio_bridge.py -v

# Run all mcp++ tests
pytest ipfs_accelerate_py/mcplusplus_module/tests/ -v

# Run with Trio markers
pytest ipfs_accelerate_py/mcplusplus_module/tests/ -v -m trio

Dependencies

The mcp++ module requires:

  • trio - Structured concurrency
  • anyio - Async portability layer
  • sniffio - Async library detection

These are likely already in requirements.txt from the original MCP implementation.

References

  1. MCP Trio Roadmap - Implementation roadmap
  2. MCP++ Spec Baseline - MCP++ conformance and migration baseline
  3. MCP++ Module Architecture - Module architecture details
  4. Original MCP Implementation - Existing asyncio-based MCP

Next Actions

To complete the MCP++ implementation:

  1. Complete P2P Tool Refactoring:

    • Copy all remaining tools from mcp/tools/p2p_taskqueue.py
    • Refactor mcp/tools/p2p_workflow_tools.py to mcplusplus_module/p2p/workflow.py
    • Refactor github_cli/p2p_*.py to mcplusplus_module/p2p/

  2. Implement Trio MCP Server:

    • Create trio/server.py with TrioMCPServer class
    • Support Hypercorn for Trio-based ASGI
    • Integration with P2P tools

  3. Implement Trio MCP Client:

    • Create trio/client.py with TrioMCPClient class
    • Native Trio transport support

  4. Expand Test Coverage:

    • P2P taskqueue tests
    • Integration tests with libp2p
    • End-to-end workflow tests

  5. Documentation:

    • Add examples directory
    • Create migration guide
    • Update main README.md with MCP++ reference

Success Criteria

The implementation will be considered complete when:

  1. ✅ Submodule added and integrated
  2. ✅ Module structure created
  3. ✅ Trio bridge implemented and tested
  4. ⏳ All P2P code refactored into mcplusplus_module
  5. ⏳ Trio-native MCP server working
  6. ⏳ Integration tests passing
  7. ⏳ Documentation complete
  8. ⏳ Can run P2P tasks without asyncio bridges

Status: Phase 1 Complete (Foundation)
Next: Phase 2 (P2P Code Refactoring)
Date: 2026-02-13