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Copilot d8269fbdfb Document MCP integration and tool scopes implementation status (#2852 )

* Initial plan

* Add comprehensive project status analysis and update roadmap

Co-authored-by: asim <17530+asim@users.noreply.github.com>

* Add executive summary of project status

Co-authored-by: asim <17530+asim@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: asim <17530+asim@users.noreply.github.com>

2026-02-12 07:24:31 +00:00

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Go Micro - Current Status Summary

Updated: February 11, 2026

🎯 Executive Summary

Go Micro's MCP integration is 3-4 months ahead of schedule, with Q1 2026 goals complete and significant Q2/Q3 2026 features already delivered.

Quick Status

✅ Q1 2026 (MCP Foundation): 100% COMPLETE
🟢 Q2 2026 (Agent DX): 60% COMPLETE (ahead of schedule)
🟢 Q3 2026 (Production): 40% COMPLETE (ahead of schedule)
🟡 Q4 2026 (Ecosystem): 0% COMPLETE (on track)

📊 What's Been Built

✅ Core MCP Integration (Q1 - COMPLETE)

MCP Gateway Library (gateway/mcp/) - 2,083 lines
- HTTP/SSE transport
- Stdio JSON-RPC 2.0 transport
- Service discovery & tool generation
- Schema generation from Go types
CLI Commands (micro mcp)
- micro mcp serve - Start MCP server (stdio or HTTP)
- micro mcp list - List available tools
- micro mcp test - Test tools (placeholder)
Documentation
- Complete API documentation
- 2 working examples (hello, documented)
- Blog post: "Making Microservices AI-Native with MCP"

✅ Advanced Features (Q2/Q3 - DELIVERED EARLY)

🔒 Security & Auth

Per-Tool Scopes
- Service-level: server.WithEndpointScopes("Blog.Create", "blog:write")
- Gateway-level: Options.Scopes map for overrides
- Bearer token authentication
- Scope enforcement before RPC execution

📊 Observability

Tracing
- UUID trace IDs per tool call
- Metadata propagation (Mcp-Trace-Id, Mcp-Tool-Name, Mcp-Account-Id)
- Full call chain tracking
Audit Logging
- Immutable audit records per tool call
- Captures: tool, account, scopes, allowed/denied, duration, errors
- Callback function: Options.AuditFunc

🚦 Rate Limiting

Per-tool rate limiters
Configurable requests/second and burst
Token bucket algorithm

📝 Documentation Extraction

Auto-extract from Go doc comments
@example tag support for JSON examples
Struct tag parsing for parameter descriptions
Manual override via WithEndpointDocs()

🚀 What Works Today

For Claude Code Users

# Start MCP server for Claude Code
micro mcp serve

# Add to ~/.claude/claude_desktop_config.json:
{
  "mcpServers": {
    "my-services": {
      "command": "micro",
      "args": ["mcp", "serve"]
    }
  }
}

For Library Users

package main

import (
    "go-micro.dev/v5"
    "go-micro.dev/v5/gateway/mcp"
)

func main() {
    service := micro.NewService(micro.Name("myservice"))
    service.Init()

    // Add MCP gateway (3 lines!)
    go mcp.ListenAndServe(":3000", mcp.Options{
        Registry: service.Options().Registry,
        Auth:     authProvider,  // Optional: auth.Auth
        Scopes: map[string][]string{  // Optional: per-tool scopes
            "myservice.Handler.Create": {"write"},
        },
        RateLimit: &mcp.RateLimitConfig{  // Optional
            RequestsPerSecond: 10,
            Burst:             20,
        },
        AuditFunc: func(r mcp.AuditRecord) {  // Optional
            log.Printf("[audit] %+v", r)
        },
    })

    service.Run()
}

For Service Developers

// Just add Go comments - docs extracted automatically!

// GetUser retrieves a user by ID. Returns full profile with email and preferences.
//
// @example {"id": "user-123"}
func (s *UserService) GetUser(ctx context.Context, req *GetUserRequest, rsp *GetUserResponse) error {
    // implementation
}

// Register with scopes
handler := service.Server().NewHandler(
    new(UserService),
    server.WithEndpointScopes("UserService.Delete", "users:admin"),
)

📈 Test Coverage

568 lines of comprehensive tests covering:

✅ Scope validation & enforcement
✅ Auth provider integration
✅ Trace ID generation & propagation
✅ Audit record creation
✅ Rate limiting
✅ HTTP & Stdio transports
✅ Tool discovery & schema generation

🎯 What's Next (Recommended Priorities)

Immediate (Next 2 Weeks)

Complete micro mcp test command (~1 day)
- Implement actual tool testing with JSON input/output
LangChain SDK (~1 week)
- Python package: go-micro-langchain
- Auto-generate LangChain tools from registry
- Example multi-agent workflow
- Impact: Largest agent framework integration
Interactive Playground (~1 week)
- Web UI for testing services with AI
- Real-time tool call visualization
- Impact: Critical for demos and sales

Short-Term (Next Month)

WebSocket Transport (~3 days)
- Bidirectional streaming for long-running operations
LlamaIndex SDK (~1 week)
- Python package for RAG integration
Case Studies (ongoing)
- Document real-world usage

📊 By The Numbers

Metric	Value
Production Code	2,083 lines
Test Code	568 lines
Documentation Files	4+
Working Examples	2
CLI Commands	3
Transports	2 (HTTP/SSE, Stdio)
Q1 Completion	100%
Ahead of Schedule	3-4 months

🔍 Where We Are on the Roadmap

Q1 2026: MCP Foundation

Status: ✅ COMPLETE (100%)

All 6 planned deliverables complete
Production-ready implementation
Comprehensive documentation

Q2 2026: Agent Developer Experience

Status: 🟢 IN PROGRESS (60% complete)

COMPLETED (ahead of schedule):

✅ Stdio transport for Claude Code
✅ micro mcp serve and list commands
✅ Tool descriptions from comments
✅ @example tag support
✅ Schema generation from struct tags
✅ HTTP/SSE with auth

NOT YET STARTED:

❌ micro mcp test (full implementation)
❌ micro mcp docs and export commands
❌ Agent SDKs (LangChain, LlamaIndex, AutoGPT)
❌ Interactive Agent Playground
❌ Multi-protocol (WebSocket, gRPC, HTTP/3)

Q3 2026: Production & Scale

Status: 🟢 IN PROGRESS (40% complete)