Reviewing files that changed from the base of the PR and between fae0b2e and 0af6a56.

• core/go.sum is excluded by !**/*.sum
• tests/core-chatbot/go.sum is excluded by !**/*.sum

• core/go.mod (2 hunks)
• core/mcp.go (21 hunks)
• core/schemas/mcp.go (1 hunks)
• docs/mcp.md (18 hunks)
• tests/core-chatbot/go.mod (1 hunks)
• tests/core-chatbot/main.go (1 hunks)
• transports/README.md (1 hunks)

tests/core-chatbot/go.mod (2)

31-31: LGTM: Testing utility dependencies added.

The addition of github.com/google/go-cmp and github.com/kr/pretty as indirect dependencies enhances testing capabilities and aligns with the MCP library update.

Also applies to: 35-35

---

39-39: Verify if the old MCP dependency can be removed.

The old github.com/metoro-io/mcp-golang v0.13.0 dependency is still present as an indirect dependency despite the migration to the new mark3labs/mcp-go library. This could indicate incomplete migration or dependency conflicts.

#!/bin/bash
# Check if the old MCP dependency is still being used anywhere in the codebase
echo "Searching for references to the old MCP library..."
rg -i "metoro-io/mcp-golang" --type go

echo -e "\nChecking go.mod files for the old dependency..."
fd "go.mod" --exec grep -l "metoro-io/mcp-golang" {}

echo -e "\nChecking for any imports of the old library..."
rg "github\.com/metoro-io/mcp-golang" --type go

core/go.mod (2)

9-9: LGTM: Clean migration to new MCP library.

Successfully migrated from metoro-io/mcp-golang to mark3labs/mcp-go v0.32.0, providing enhanced MCP capabilities including SSE support.

---

28-32: Verify new dependency versions are secure and current.

The new indirect dependencies introduced with the MCP library migration should be verified for security vulnerabilities and currency.

Are there any known security vulnerabilities in these Go packages and versions: github.com/google/uuid v1.6.0, github.com/spf13/cast v1.7.1, github.com/yosida95/uritemplate/v3 v3.0.2?

core/schemas/mcp.go (2)

15-15: LGTM: Unified connection string field design.

Replacing HTTPConnectionString with the more generic ConnectionString field that works for both HTTP and SSE connections is a clean design improvement that reduces schema duplication.

---

25-27: LGTM: Proper SSE support implementation.

The addition of MCPConnectionTypeSSE constant and updated documentation properly extends MCP connection types to support Server-Sent Events alongside existing HTTP and STDIO options.

transports/README.md (2)

121-124: LGTM: Documentation updated to reflect schema changes.

Correctly updated from "http_connection_string" to "connection_string" to match the unified schema design, and properly included the required empty arrays for tool configuration.

---

125-131: LGTM: Comprehensive SSE connection example.

The new SSE MCP client configuration provides a clear, practical example of how to use the Server-Sent Events connection type with proper field structure and naming conventions.

tests/core-chatbot/main.go (1)

251-256: LGTM: Proper SSE MCP client test configuration.

The new SSE MCP client configuration properly demonstrates the usage of MCPConnectionTypeSSE and provides practical test coverage for the Server-Sent Events functionality. The integration with existing configuration is clean and follows established patterns.

docs/mcp.md (3)

46-50: Great addition of SSE connection type documentation.

The documentation clearly explains the new Server-Sent Events connection type and its automatic cleanup behavior, which aligns well with the implementation in core/mcp.go.

---

134-138: Well-structured configuration examples for the new API.

The examples clearly demonstrate:

• Migration from HTTPConnectionString to ConnectionString for HTTP connections
• New SSE client configuration with proper structure
• Consistent field naming across connection types

Also applies to: 190-202

---

419-425: API documentation is accurate and complete.

The struct definitions and constants correctly reflect the implementation:

• ConnectionString field properly documented as required for HTTP/SSE
• Envs field added to STDIO configuration
• SSE connection type constant included

Also applies to: 991-997, 1008-1009, 1020-1023

core/mcp.go (5)

8-18: Excellent migration to the new MCP library with proper SSE support.

The changes effectively:

• Update imports to use mark3labs/mcp-go
• Add slices package for cleaner slice operations
• Include cancelFunc for proper SSE connection cleanup
• Update server and client types to match the new library

Also applies to: 46-60

---

474-483: Well-designed connection lifecycle management for different transport types.

The implementation correctly:

• Handles SSE as a new connection type
• Uses long-lived contexts for SSE connections (persistent streams)
• Uses timeout contexts for HTTP/STDIO connections
• Stores cancel functions for proper SSE cleanup

Also applies to: 490-510, 552-557

---

826-905: Clean implementation of transport-specific connection methods.

The connection creation methods are well-designed:

• Clear separation of concerns for each transport type
• Proper environment variable validation for STDIO
• Consistent error handling and connection info structure
• Appropriate use of the new library's transport APIs

---

907-954: Excellent cleanup implementation with proper resource management.

The cleanup method thoroughly:

• Cancels SSE contexts before closing connections (critical for SSE)
• Closes all client transport connections
• Clears tool maps and client references
• Properly logs all cleanup operations
• Handles errors gracefully without failing the entire cleanup

---

244-276: Smart architectural change to STDIO-based local server.

The migration from HTTP to STDIO for the local server:

• Eliminates port configuration complexity
• Simplifies in-process communication
• Reduces potential port conflicts
• Maintains the same functionality with less overhead

Also applies to: 309-375