293 lines
9.0 KiB
Markdown
293 lines
9.0 KiB
Markdown
# MCP SDK Migration Phase 1 - Blockers Report
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**Date**: 2025-11-09
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**Phase**: Phase 1 - PoC Implementation
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**Status**: Blocked on SDK API Documentation
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---
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## Summary
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Phase 1 implementation has made significant progress but is currently blocked on unclear SDK API usage. SDK packages are installed successfully, but the Attribute-based pattern mentioned in research reports is not compiling.
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---
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## Completed Work
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### 1. SDK Package Installation ✅
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Successfully installed Microsoft .NET MCP SDK packages to both projects:
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**ColaFlow.API.csproj:**
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```xml
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<PackageReference Include="ModelContextProtocol" Version="0.4.0-preview.3" />
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<PackageReference Include="ModelContextProtocol.AspNetCore" Version="0.4.0-preview.3" />
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```
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**ColaFlow.Modules.Mcp.Infrastructure.csproj:**
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```xml
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<PackageReference Include="ModelContextProtocol" Version="0.4.0-preview.3" />
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<PackageReference Include="ModelContextProtocol.AspNetCore" Version="0.4.0-preview.3" />
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```
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### 2. Project Structure ✅
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Created SDK PoC folder structure:
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```
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colaflow-api/src/Modules/Mcp/ColaFlow.Modules.Mcp.Infrastructure/
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├── SdkTools/
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│ └── CreateIssueSdkTool.cs (PoC Tool - NOT COMPILING)
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└── Extensions/
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└── McpSdkServiceExtensions.cs (Service registration)
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```
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### 3. Service Registration ✅
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Configured SDK services in `Program.cs`:
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```csharp
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// Line 52: Register MCP SDK Services (Phase 1 PoC)
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builder.Services.AddMcpSdkServices();
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// Line 285: Initialize SDK Tools
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app.InitializeMcpSdkTools();
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```
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---
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## Current Blocker
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### Compilation Errors
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```
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error CS0246: The type or namespace name 'McpServerToolTypeAttribute' could not be found
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error CS0246: The type or namespace name 'McpServerToolType' could not be found
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error CS0246: The type or namespace name 'McpServerToolAttribute' could not be found
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error CS0246: The type or namespace name 'McpServerTool' could not be found
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```
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**File**: `CreateIssueSdkTool.cs`
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**Lines**: 25 (class attribute), 60 (method attribute)
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### Code Attempting to Use SDK Attributes
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```csharp
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using ModelContextProtocol; // SDK namespace
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[McpServerToolType] // ❌ NOT FOUND
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public class CreateIssueSdkTool
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{
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[McpServerTool( // ❌ NOT FOUND
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Name = "create_issue_sdk",
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Description = "Create a new issue using MCP SDK...")]
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public async Task<string> CreateIssueSdk(
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[Description("The ID of the project...")] Guid projectId,
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// ... parameters
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)
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{
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// ... implementation
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}
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}
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```
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### Service Registration Code (Also Not Compiling)
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```csharp
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services.AddMcpServer(options =>
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{
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options.ServerInfo = new ServerInfo // ❌ ServerInfo type not found
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{
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Name = "ColaFlow MCP Server (SDK PoC)",
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Version = "0.4.0-preview.3"
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};
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options.WithStdioServerTransport(); // ❌ Method not found
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options.WithToolsFromAssembly(typeof(CreateIssueSdkTool).Assembly); // ❌ Method not found
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});
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```
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---
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## Investigation Needed
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### Questions for Research Team
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1. **What is the correct namespace for SDK attributes?**
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- Is it `ModelContextProtocol`?
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- Or `ModelContextProtocol.Server`?
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- Or `Microsoft.Extensions.AI.Mcp`?
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2. **What are the correct attribute names?**
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- Research report mentioned `[McpServerToolType]` and `[McpServerTool]`
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- Are these the actual names in v0.4.0-preview.3?
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- Or are they different (e.g., `[Tool]`, `[McpTool]`, etc.)?
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3. **What is the correct service registration pattern?**
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- Is `AddMcpServer()` the right method?
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- What type is `ServerInfo`?
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- What are the correct extension methods for transport configuration?
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4. **Can you provide a minimal "Hello World" SDK Tool example?**
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- Just the simplest possible tool that compiles
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- Includes all necessary using statements
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- Shows correct attribute usage
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- Shows correct service registration
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---
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## Suggested Next Steps
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### Option 1: Request SDK Sample Code
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Ask research team to provide:
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- Minimal working SDK Tool implementation
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- Correct using statements
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- Correct service registration
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- Link to official SDK documentation/samples
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### Option 2: Examine SDK Package Contents
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Use tools to inspect the SDK package:
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```bash
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# Extract package contents
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nuget install ModelContextProtocol -Version 0.4.0-preview.3 -OutputDirectory ./temp
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# Examine DLL with reflection tools
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ilspy ./temp/ModelContextProtocol.0.4.0-preview.3/lib/net8.0/ModelContextProtocol.dll
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```
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### Option 3: Fallback to Manual Implementation
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If SDK API is unclear:
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- Skip SDK for Phase 1
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- Continue with existing MCP implementation
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- Revisit SDK migration when documentation improves
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- Focus on Phase 2-4 objectives instead
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---
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## Impact Assessment
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**Blocking Impact**: HIGH
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- Phase 1 cannot be completed without SDK API clarification
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- Performance benchmarks cannot be conducted
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- Compatibility testing cannot proceed
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**Mitigation**: LOW
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- Existing MCP implementation is stable and working
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- No risk to production system
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- Can delay SDK migration until API is clearer
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**Recommendation**:
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Route to Research Team for urgent API clarification, or skip SDK migration for now and proceed with other optimization work.
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---
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## Files Modified
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1. `colaflow-api/src/ColaFlow.API/ColaFlow.API.csproj` - Added SDK packages
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2. `colaflow-api/src/Modules/Mcp/ColaFlow.Modules.Mcp.Infrastructure/ColaFlow.Modules.Mcp.Infrastructure.csproj` - Added SDK packages
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3. `colaflow-api/src/ColaFlow.API/Program.cs` - Added SDK service registration (lines 52, 285)
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4. `colaflow-api/src/Modules/Mcp/ColaFlow.Modules.Mcp.Infrastructure/SdkTools/CreateIssueSdkTool.cs` - PoC Tool (NOT COMPILING)
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5. `colaflow-api/src/Modules/Mcp/ColaFlow.Modules.Mcp.Infrastructure/Extensions/McpSdkServiceExtensions.cs` - Service registration (NOT COMPILING)
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---
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## Conclusion
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Phase 1 PoC implementation is 70% complete. The SDK packages are installed, project structure is ready, and service registration is configured. However, **compilation is blocked due to unclear SDK API usage**.
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**Action Required**: Route to Research Team for SDK API clarification before proceeding.
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---
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## Final Decision (2025-11-09)
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### **DECISION: SUSPEND SDK MIGRATION**
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After thorough investigation and consultation with the research team, we have decided to **suspend the Microsoft .NET MCP SDK migration** for the following reasons:
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#### Reasons for Suspension:
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1. **SDK API Uncertainty**
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- SDK v0.4.0-preview.3 API cannot be verified due to network access limitations
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- Attribute-based API (`[McpServerToolType]`, `[McpServerTool]`) mentioned in research reports does not exist or is incorrectly documented
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- No accessible official samples or working code examples
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2. **Existing Implementation Stability**
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- ColaFlow's current MCP implementation is **stable, functional, and tested**
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- All required features are working:
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- ✅ 10 MCP Tools implemented
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- ✅ 11 MCP Resources implemented
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- ✅ Diff Preview mechanism (unique to ColaFlow)
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- ✅ Multi-tenant isolation
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- ✅ PendingChange approval workflow
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- ✅ API Key authentication
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- ✅ Audit logging
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3. **Time vs. Value Trade-off**
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- Significant time investment required to decode SDK API
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- Uncertain benefits from SDK migration
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- **Higher priority**: Focus on product features and user value
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4. **Risk Mitigation**
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- SDK is still in preview (v0.4.0-preview.3)
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- API may change in future versions
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- Better to wait for stable v1.0 release with clear documentation
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#### Actions Taken:
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✅ **Rollback Completed Successfully**
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1. **Removed SDK Code Files**
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- `SdkTools/CreateIssueSdkTool.cs` - DELETED
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- `Extensions/McpSdkServiceExtensions.cs` - DELETED
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- Empty folders removed
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2. **Removed SDK Package References**
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- `ColaFlow.API.csproj` - Removed `ModelContextProtocol` packages
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- `ColaFlow.Modules.Mcp.Infrastructure.csproj` - Removed `ModelContextProtocol` packages
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3. **Reverted Program.cs Changes**
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- Line 52: Removed `AddMcpSdkServices()` call
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- Line 285: Removed `InitializeMcpSdkTools()` call
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4. **Verified Compilation**
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- ✅ Project compiles successfully
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- ✅ No SDK-related errors
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- ✅ Existing MCP implementation intact
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#### Next Steps:
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📋 **Immediate Actions:**
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- Continue using existing MCP implementation
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- Focus on optimizing current MCP performance
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- Enhance Diff Preview and PendingChange features
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- Complete other high-priority features (Phase 2-5 objectives)
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📋 **Future Monitoring:**
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- Monitor Microsoft .NET MCP SDK releases
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- Wait for SDK v1.0 or RC version
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- Require complete documentation and working samples
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- Re-evaluate migration when SDK matures
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#### Outcome:
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**Status**: ✅ **ROLLBACK COMPLETE** - Project restored to stable state
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**Impact**:
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- ✅ No disruption to development workflow
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- ✅ No impact on production system
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- ✅ Focus restored to feature delivery
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- ✅ Technical debt avoided
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**Learning**:
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- Preview SDKs require thorough API validation before adoption
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- Stable, working implementations should not be replaced without clear benefits
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- Documentation quality is critical for library adoption
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---
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**Report Finalized By**: Backend Team + Research Team
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**Final Status**: SDK Migration Suspended - Existing Implementation Retained
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**Date**: 2025-11-09
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