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@overheadhunter overheadhunter commented Dec 13, 2025

ignore unknown values during deserialization of ClientCapabilities.Elicitation

Motivation and Context

This fixes a deserialization issue in the initialization request sent from clients using the 2025-11-25 protocol.

How Has This Been Tested?

Test added

Breaking Changes

No, deserialization is now less strict.

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Documentation update

Checklist

  • I have read the MCP Documentation
  • My code follows the repository's style guidelines
  • New and existing tests* pass locally
  • I have added appropriate error handling
  • I have added or updated documentation as needed

* I had local issues with starting docker.io/tzolov/mcp-everything-server:v3 used in one of the tests. Up until this test, everything was green.

Additional context

see #724

@overheadhunter overheadhunter changed the title fix #724 fix #724, restore compliance to 2025-11-25 spec Dec 13, 2025
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lgtm

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2 participants