fix: update MCP SDK to v1.20.0 for 2025-06-18 protocol support

[roomote]

Summary

This PR updates the @modelcontextprotocol/sdk dependency from version 1.12.0 to 1.20.0 to add support for MCP servers using protocol version "2025-06-18".

Problem

As reported in #8683, Roo was unable to connect to MCP servers implementing the 2025-06-18 protocol version, showing the error:

Server's protocol version is not supported: 2025-06-18

This was because the SDK version 1.12.0 only supported protocol versions up to 2025-03-26. Support for 2025-06-18 was added in SDK version 1.13.0.

Solution

• Updated @modelcontextprotocol/sdk from 1.12.0 to 1.20.0 in src/package.json
• Added type casting in McpHub.ts to maintain backward compatibility with the existing McpToolCallResponse type structure

Changes

• src/package.json: Updated MCP SDK dependency version
• pnpm-lock.yaml: Updated lock file with new dependency version
• src/services/mcp/McpHub.ts: Added type casting for CallToolResultSchema compatibility

Testing

• ✅ All existing MCP tests pass (McpHub.spec.ts, useMcpToolTool.spec.ts)
• ✅ TypeScript compilation successful
• ✅ Lint checks pass

Impact

This is a non-breaking change that extends MCP server compatibility to include servers using the 2025-06-18 protocol version.

Fixes #8683

---

Important

Update MCP SDK to v1.20.0 for 2025-06-18 protocol support and add type casting for backward compatibility.

• Dependencies:
  • Update @modelcontextprotocol/sdk from 1.12.0 to 1.20.0 in package.json for 2025-06-18 protocol support.
• Type Casting:
  • Add type casting for CallToolResultSchema in McpHub.ts to maintain backward compatibility with McpToolCallResponse.
• Testing:
  • All existing tests pass (McpHub.spec.ts, useMcpToolTool.spec.ts).
  • TypeScript compilation and lint checks successful.
• Impact:
  • Non-breaking change extending MCP server compatibility to 2025-06-18 protocol version.

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[roomote]

Code Review Summary

✅ Review Complete - No Issues Found

I've thoroughly reviewed this pull request and found no issues that require changes.

Changes Reviewed

• ✅ Dependency update: @modelcontextprotocol/sdk from 1.12.0 to 1.20.0
• ✅ Type casting added in McpHub.ts for backward compatibility
• ✅ Lock file updates in pnpm-lock.yaml

Validation

• All existing MCP tests pass as reported
• TypeScript compilation successful
• Lint checks pass
• The type cast maintains compatibility with existing McpToolCallResponse type structure

The changes are minimal, focused, and achieve the stated goal of adding support for MCP servers using protocol version 2025-06-18.

Recommendation: ✅ Approve

[hsuyuming]

I can connect to the MCP server using Roo and mcp-remote. However, when I set up a basic Roo configuration with the type set to "streamable-http", I receive the following error: "Streamable HTTP error: Failed to open SSE stream: Not Acceptable".

• mcp-remote

• Roo configuration with the type set to "streamable-http"

{
  "mcpServers": {
    "snowflake-mcp2": {
      "type": "streamable-http",
      "url": "https://<domain>/mcp>",
      "headers": {
        "Authorization": "Bearer <token>"
      },
      "disabled": false,
      "alwaysAllow": []
    },
  }
}

[hsuyuming]

Maybe this is the MCP server issue, investigating

[hsuyuming]

It appears that the issue is due to the mcp server only supporting non-streaming responses. So this PR should be good
https://docs.snowflake.com/en/user-guide/snowflake-cortex/cortex-agents-mcp